this specification is approved for use by the naval seasys

MILITARY SPECIFICATION

ITWI-I-POUNDA41LV-24’722(SH)15 June 1990

VALVE AND SUBPLA~ SERVO FLOW-CONTROL ELE(XROHYDRAULI~GENERAL SPECIFICATION FOR

This specification is approved for use by the Naval S e a S y s t emsCo i nma r @ Departmentof the Navy, and is available for use @ all departmem$s and agencies of theDepartment of Define.

L SCOPE

1.1 Scope. This specikation rovers the requirementsfor electrohydrautic,flcnv-controlservovalvesand theirassociatedsubplates.This typeof valvewillbe instakl intoa closed-loop,positioncontrolsavosyskm. The valvesare designedforekher standardor quietoperationandu* quii-typeor facesealmounting configurations.

1.2 Classification.Electrohydraulicservo-controlvalves shallbe furnishedin theconfigurations,flowrang% and noisegradeslistedtitheapplicablespecificationsheet.Subplatesshallbe furnkhedk accordancewith thewe@ht and configurationrtxpdrementsof theapplicableSpecilimtionsheet

2 APPLICABLE DOCUMENT’S

2.1 Government doemnent.s.

2.1.1 Specifications$stindmds, and handbooks. The following specifications, standards, andhandbooks form a part of this document to the extent specified herein. UrIkss othexwise specified,the issues of these documents are those listed in the issue of the Department of Defense Indexof Specifications and Standards (DODES) and supplement thereto, cited in the solicitation (see62).

Benefk!iat amm f m t s(mxwnmendal~ additi~deletions) and any pertinent data which maybe of use ioimproving this docurmmt should be Wlreswl to Commander,NavalSeaSystemsConunm@ SEA 55753,13epan-mealoftheNavy,Wmbhqpoa,DC 20362-5101byW@ tieself-addressedSumkudma“ lionDocume@ lnlpKwe-memlI%oposd(IIDForm 1426)appearingattieendoftindocumemorbyIewer.

AMSC WA Fsc 4810

DEI’R.IBUTION STATEMENT A. Approved for public rcleasq distribution is unlimited.

Downloaded from http://www.everyspec.com

MIL-V-24722(SH)

SPECIFICATIONS

MILITARY

MIL-V-3

MIL-W-76

MIL-W-16878

M1l.-W-l6878/l7

MIL-L-19140

MIL-V-24722/l

MIL-V-24722/2

MIL-V-24722/3

FEDERAL

J-W-1177

PPP-F-320

STANDARDS

MILITARY

MIL-STD-105

MIL-STD-202

Valves, Fittings, and Flanges (Except for Systems Indicatedherein); Packaging of

Wire and Cable, Hookup, Electrical, Insulated

Wh-e, Electrical, Insulated, General Specification for

Wire, Electrical, Polyvinyl Chloride (PVC) Insulated, 105”C,600 Volts, Polyamide Jacket

Lumber and Plywood,Fh-e-RetardantTreated

Valve and Subplate, Servo Flow-Control, Electrohydraulic, forO to 50 Gallons Per Minute (GPM) and O to 80 GPM FlowRanges

Valve, Sewo Flow-Control, Electrohydraulic, for O to 10 GPMFlow Range

Valve and Subplate, Servo Flow-Control, Electrohydraulic, forO to 80 GPM Flow Range

Wke, Magnet, Electrical, General Specification for

Fiberboard: Corrugated and Solid, Sheet Stock (ContainerGrade) and Cut Shapes

Sampling Procedures and Tables for Inspection by Attributes

Test Methods for Electronic and Electrical Component Parts


MILV-24722(SH)

MIL.-STD-74O-2 Structw4xme Vibrato~ Acceleration Measurements andAcceptance Criteria of Shipboard Equipment

DOD-STD-1399 Interface Standard for Shipboard Systems, section 070-Part 1,Section 070 D.C. Magnetic Field Enviromnen& (Metric)

M3L-STD-2193 Hydraulic System Components, Ship; (Metric)

MS3102 Connectors, Receptacle, Electric, Box Mounting, SolderContacts,AN Type

MS3112 Ckmnectors, Receptacle, Electriq Series 1, Box Mounting,Flange, Bayonet Coupling, Solder Contact

(Unless otherwise indicated, copies of federal and mijitary specifications, standards, and handbooksare available horn the Naval Publications and Forms Center, (A-. NPODS), 5801 TaborAvenuq Philadelphia, PA 19120~5099.)

22 No ’ n amemme n t publications The following document(s) form a part of this documentto the extent specified herein. Unless otherwise specified, the issuesof the documents which areDOD adopted are those listed in the issue of the DODISS cited in the solicitation, Unlessotherwise specfied, the issues of documents not liited in the DODISS are the issues of thedocuments cited in the solicitation (see 6.2).

AMERICAN NATIONAL STANDARDS INSTHWTE (ANSI)

Y321O Fluid Power Diagrams, Graphic Symbols for; (DOD Adopted]

(Applications for copies should be made to the American National Standards Institute, 1430Broadwayl New York NY 10018.)

SOCXEI’Y OF AUTOMOTIVE ENGINEERS (SAE)

AR? 490 Aerospace Recommended Practice - EkdrohydraulicFlow-Control Semwalves

(Applications for copies should be made to the Society of Automotive Engineers, Inc., 400Commonwealth Drive, Warrendale, PA 15096.)

(NorM30vanment standards and other publications are normally available from the organizationstiiat prepare or distribute the documents. These documents also may be available in or throughlibraries or other informational semices.)

3


MIL-V-24722(SH)

23 Order of precedence. In the event of a conflict between the text of this document andthe references cited herein (except for related specification sheets), the text of this document takesprecedence. Nothing in this document, however, supersedes applicable laws and regulations unlessa specific exemption has been obtained.

3.1 Specification sheets. The individual valve and subplate requirements shall be as specifiedherein and in accordance with the applicable specification sheet. In the event of any conflictbetween the requirements of this specification and the specification sheet, the latter shall govern.

3.2 Fmt article. When specified (see 6.2), a valve shall be subjected to first article inspection(see 6.6) in accordance with 4.2.1.

33 General requirements. General requirements shall be in accordance with MIL-STD-2193.Specific definitions of technical terms used throughout this specification which pertain to servovalvedesign, construction, performance and testing may be found in the Recommended Terminologysection of SAE ARP 490.

3.4 Materials. Materials shall be limited to those specified in MIL-STD-2193 and theapplicable specification sheets. Materials shall be compatible with the fluid, temperature, se~iceand performance requirements specified herein.

3.4.1 Internal parts. Flow metering elements within the equipment subject to movement orwear shall be hardened on the friction surfaces to a minimum of Rockwell C-56 or equivalent.

3-5 Design and construction- The general design and construction requirements shall be inaccordance with MIL-STD-2193 (see 6.3).

3.5.1 Structural desigm

3.5.1.1 Presmre boundary.

3.5.1.1.1 Proof pressure. The valve and subplate pressure boundaries shall withstand proofpressure levels of 1.5 times the design operating pressures required by the applicable specificationsheet.

35.1.1.2 Fatigue. Valve and subplates shall be rated and tested in accordance withMIIAWD-2193 design requirements when specified in the applicable specification sheet.

4


MI.LV-24722(SH)

3.S.1.13 E&mid leakage No sign of external leakage, other than slight wetting insufficientto form a drop shall be exhibited, when subjected to any of the tests required by the applicablespecification sheeL

35.12 In@aIiation inte&ce&

35.121 Patterm The interface pattern for porting and mounting holes shall be in accordancewith the applicable specification sheet.

3JLCL2 13mmlo~ Dimensions shall be within the envelope requirements of the applicablespecification sheet

3S.KL3 Ekctrical connection. Electrical connection to the valve shall be provided by acircular, environment resistant receptacle. Specific mnnector sizes and pin-to-pin electricalcharacteristics sha~l meet the requirements of the individual specification sheets.

332 Electrical d~igm

351U Fungus-resistant materials. Nonmetallic parts shall be inherently nonfimgus-nutrientOr treatedtO resistfungusgrowth.

33.Z2 h%~et wire. Unless othenvise specified in the applicable specification shee~ magnetwire shall conform to J-W-1177. Class and Type of insulation shall meet the requirements of theapplicable specification sheet.

3523 Lead wk Lead wire shall conform to MIL-W-76 or MIL-W-M87&

33.24 Coils. Coils shall be evenly wound and insulated to meet the performancerequirements specified hercim The cuils shall be completely insulated from the frame and othergrounded parts. Tlie coil leads shall not be internally grounded. Coils shall be suitably taped andimpregnated as requir@ to prevent damage under prolonged exposure to humidity and saIt-fogenvironmental conditions. Coils sb.11 be securely anchored to the frame or other stationary partsin a manner to prevent mil movement or strain on the coil leads.

35= Cawz Unless otherwise specified in the applicable spedkation shee~ the coil housingshall be enclosed and shall be electrically isolated from any ekctrical circuit and shall bemagnetically shielded.

3.526 Insulation resistance. The insulation resistarme between separate coils of the sameelectrical device or between the coils and case ground shall be greater than 10 megohms followinga 10 to 15 second application of 500 volts direct current (Vdc).

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MIL-V-24722(SH)

35.27 Gil resistance. The servovalve torque motor shall have pin-to-pin resistances asspecified in the applicable specification sheet.

3.5.28 Dielectric strength The unit shall be designed to withstand an initial test potentialof 450 volts root mean square (Vrms) plus the rated voltage at 60 hertz (Hz) for a period of 60seconds when applied between the input leads and the case.

3329 Magnetic field effects. Electrical components of the servovalve shall meet therequirements of this specification when exposed to an ambient or steady state magnetic field of Oto 20 oersteds (Oe) and a magnetic field rate of change of 20 oersteds per second (Oels) unlessdeleted or otherwise specified in the applicable specification sheet.

35.3 Hydraulic design. The valve shall meet the static, null and dynamic requirements ofthis specification when operated at the environmental and operating conditions specified in theapplicable specification sheet with a test fluid that shall meet the class of cleanliness specified inthe applicable specification sheet.

3-53.1 Rated flow. Flow from either valve control port shall be adjustable to within ratedflow limits specified in the applicable specification sheet when operated at required fluid pressureand temperature conditions.

3.532 Flow limit adjustments- Unless specifically deleted by the applicable specificationsheet, each valve shall have two external, manually adjustable, mechanical devices that shall limitmaximum flow to the amount required by the applicable specification sheet. These stops shall notaffect the valve operation until the torque motor electrical command signal exceeds the stopsetting. All adjustments shall be designed in accordance with MITSIT)-2193 requirements forfunction adjustment screws.

3533 Intefflow. Unless permitted by the applicable specification sheet, there shall be nointerflow between supply and return ports when shifting from one position to another.

353.4 Noise. The assembled valve and subplate shall be designed to operate below thestructurebome noise level required by the applicable specification sheet.

3535 Pilot stage porting. Requirements for multistage valve porting and hydrauliccommunication shall be satisfied as required by the applicable specification sheet.

353.6 Internal leakage. The fluid leakage with cylinder ports looped together and with thevalve at null shall not exceed the allowable limit of the applicable specification sheet for a newvalve. Total internal leakage shall not increase by more than the amount allowed by the applicablespecification sheet when retested after 2 million cycles of operation.


M.ILV-24722(SH)

353.7 Contamination sensitivity. When required by the applicable specification shee~ thevalve shall satis~ the internal leakage and hydraulic shifting force requirements of the applicablespecification sheet when subjected to a cyclic contamination sensitivity test performed in accordancewith specification sheet and MIL-STD-2193 requirements.

353.7.1 CM15ces Orifices, if required, shall be designed and installed with strainer screendevices in accordance with h41LSTD-2193. The location of each strainer screen shall be marked,and each strainer screen shall be c~eanable and replaceable without removing or disassembling thevake.

333.8 Fluid temperature The valve shall meet internal leakage, flow gain characteristicsand noise requirements of this specification when the specified hydraulic fluid is held within theapplicable specification sheet temperature or viscosity limits. When required by the applicablespecification sheet, the valve shall also meet the extreme temperature functioning requirementsin accordance with MIL-STD-2193.

353.9 Air removal. Valves designed for quiet operation shall incorporate provisions forremoving entrapped air.

333.10 Special seal design. Gland and seal designs w~~ch involve the use of either slipperrings or caps to minimize seizing of smooth surfaces under high pressure must be specificallyapproved by the contracting activity.

3.52.11 Fluid pressure. The valve shaU meet internal leakage flow gain characteristics andnoise requirements of thii specification when the specified hydraulic fluid is held withkn theapplicable specification sheet pressure limits. When required by the applicable specification sheet,the valve shall also meet extreme pressure functioning requirements.

33.4 Static ptxformmce.

35.4.1 Polarity. Positive voltage applied to pins designated by the applicable specificationsheet shall open control port Cl to supply pressure and mntrol port C2 to return pressure.

33.42 Flow @m Flow gain shall be within the torque motor current/control flow envelopespecified in the applicable specification shee~

33.43 Temperature and pressure sensitivity. Requirements which characterize semovalvesensitivity to high and low fluid temperature and surrounding environmental ambient temperatureshall be met when required by the applicable specification sheet When required by the applicablespecification sheet the valve shall also operate in conformance to requirements for specified fluidsystem pressure levels above and below normal operating levels.

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MIL-V-24722(SH)

35.4.4 Null lap. Sliding spool lap tolerances shall be controlled to obtain blocked-load,zero-flow cylinder port pressures that are within the allowable limits of the applicable specificationsheet.

3.5.4.5 Hysteresis. The valve hysteresis shall be measured in terms of the valve electricalinput signal and shall not exceed the percent of the maximum rated current allowed by theapplicable specification sheet.

3.5.4-6 Flow threshold. The algebraic difference of the positive and negative torquemotorcurrent required to cause a valve output shift, as defined in the applicable specification sheets,shall not exceed the allowable output limit specified in the applicable specification sheet.

3-5.4.7 Pressure @m The pressure gain shall meet or exceed the specified percent of theallowable load pressure drop required by the applicable specification sheet.

3.55 Dynamic requirements.

353.1 Amplitude ratio. Amplitude ratio values of the valve output with respect to thesinusoidal torque motor input electrical signal throughout the specified frequency range, ascalculated in accordance with SAE ARP 490, shall fall within the acceptance boundaries definedby the applicable specification sheet.

355.2 Phase lag- Phase angle values of the valve output with respect to the input sinusoidalelectrical signal throughout the frequency range required by the applicable specification sheet shallfall within the acceptance boundaries defined by the applicable specification sheet and SAE ARP490.

3.5.6 Endurance. The valve shall operate for 2 million cycles under normal conditions beforereplacement of parts, other than seals and strainer screen. Duty cycle magnitude and frequencyis defined as a three second sequence of torque motor signal commands which starts from null,steps to maximum Cl flow rated current for one second, reverses to maximum C2 flow ratedcurrent for one second, and reverses to null for one second.

3.6 Operational environments.

3.6.1 Ambient conditions. The valve shall meet the operating requirements of thisspecification throughout the ambient temperature and pressure ranges specified in MIL-STD-2193,unless otherwise specified in the applicable specification sheet.

3.6.2 Ambient pressure range. The valve shall meet the operating requirements of thisspecification after exposure to an ambient pressure range of 0.7 to 2.0 bars (10.2 to 29 pounds persquare inch (psi).

8


Mnv-24XZ2(sH)

3.63 Shock. The valve shall nm.et the requirements of the applicable specificaticm sheetfollowing completion of the shock test performed in accordance with MIL-STD-2193.

3.&4 Vilntiom T%e valve shall meet the requirements of the applicable specification sheetfollowing completion of the vibration test performed in accordance with MIL-STD-2193.

3.65 Salt fog. Valves and subplates shall withstand the salt fog test required byMIL-STD-2193.

3.7 Idedicatim marlkin~

3.7.1 Component identification. Valves and subplates shall be identified and marked inaccordance with the requirements of MIL-STD-2193.

3.72 Port identification $ubpiate fluid ports shall be clearly and permanently marked. Themarkings shall be vis~%lewhen the mating connector flanges are installed. Valves not requiringsubplates shall have their port locations indicated by permanent markings on the perimeter of themounting base, unkss otherwise specified in the applicable specification shee~ The portidentification shall be as follows:

a. Main supply port - Pb. Pilot supply port - PP~ Main return port - Rd. Pilot return port - PRe. Control pressure port – ClL Control pressure port - C2g. Main stage positioning pressure - PV1k Main stage positioning pressure - PV2

38 I&xchangeability. Parts having the same manufacturer’s part numbers shall be directlyand completely interchangeable in accordance with MXJXI’D-2193. Parts of components that aremanufactured and identified as a matched subassembly, such as a lapped spool and sleevesubassembly shall, however, be interchanged only as a uni~

3.9 Maintainability. Urdess otherwise specified in the specification shee~ the mean time torepair (MTX’R) of the valve shall not exceed 60 minutes. MTll? is to be limited to fault isolationand repair either by replacing the complete valve assembly or by parts replacement. Partsreplacement shall be limited to seals, filter screens, and subassemblies that can be replaced by usingstandard tools that are listed in the Federal Supply Catalog. (Copies of this catalog may beconsulted h the office of the Defense Contract Administration Services Management Area(DCASMA)’.)

9


MIL-V-24722(SH)

4. QUALITY ASSURANCE PROVISIONS

4.1 Responsibility for inspeetiom Unless otherwise specified in the contract of purchaseorder, the contractor is responsible for the performance of all inspection requirements(examinations and tests) as specified herein. Except as otherwise specified in the contract orpurchase order, the contractor may use his own or any other facilities suitable for the performanceof the inspection requirements specified herein, unless disapproved by the Government. TheGovernment reserves the right to perform any of the inspections set forth in the specificationwhere such inspections are deemed necessary to ensure supplies and services conform to prescribedrequirements.

4.1.1 Responsibility for compliance- All items shall meet all requirements of sections 3 and5. The inspection set forth in this specification shall become a part of the contractor’s overallinspection system or quality program. The absence of any inspection requirements in thespecification shall not relieve the contractor of the responsibility of ensuring that all products orsupplies submitted to the Government for acceptance comply with all requirements of the contract.Sampling inspection, as part of the manufacturing operations, is an acceptable practice to ascertainconformance to requirements, however, this does not authorize submission of known defectivematerial, either indicated or actual, nor does it commit the Government to accept defectivematerial.

4-2 Classificationof inspections.The inspection requirements specified herein are classifiedas follows:

First articleinspection(see4.2.1)~ Qualityconformance inspection(see4.2.2).

4.21 Fmt article inspeetiom First article inspection shall consist of the tests specified intables I and II (see 6.3). The detailed technical test requirements and tests are specified in theapplicable specification sheets. Unless otherwisespecified in the applicable specification sheet, thefirst article tests are to be conducted in sequence by groups in the order listed after completionof the general inspections of tables I and 11. (Tests within a group need not be conducted insequence unless specifically stated.)

10


i+


..

MIL-V-24722(SH)

43.1.1 Fmt article inspection. The selected units shall be specifically identified according tospecification sheet number, noise grade, part number and serial number. The units must be visuallyand dimensionally examined prior to testing to certi& form, fit and function conformance to specificcritical requirements contained in the documents required by 3.5 and the appendix.

43.12 Quality conformance. Each valve and subplate shall be subjected to a visual anddimensional examination to verify conformance with the interface and installation dimensionrequirements of the applicable specification sheet.

4.3.2 Proof pressure tes~

43.21 Fmt article proof test- The unit shall be hydrostatically tested to the pressure testlevel of the applicable specification sheet for a period of not less than three minutes. The valveshall be visually examined for external leakage while pressurized during the proof pressure test.No sign of external leakage, other than slight wetting insufficient to form a drop shall beacceptable. No permanent deformation is acceptable.

43.2.2 Quality cxmformance proof tes~ Each valve and subplate shall be hydrostatically testedto the pressure test levels of the applicable specification sheet for a period of not less than oneminute. The valve shall be visually examined for external leakage while pressurized during theproof pressure test. No sign of external leakage, other than slight wetting insufficient to form adrop shall be acceptable. No permanent deformation is acceptable.

433 Run-in. The valve control pressure ports shall be connected across a throttling valve andcycled plus or minus 100 percent of rated torque motor current for at least 100 cycles while in atest configuration which generates maximum design operating fluid pressures, unless otherwisespecified in the applicable specification sheet. There shall be no evidence of external leakageduring the run-in period. The valve shall demonstrate the necessary polarity and functionabilityto ensure that it is ready for the remainder of either the first article or quality conformanceinspection test program.

43.4 Insulation resistance. Insulation resistance between separate coils or between the coilsand case ground shall be performed in accordance with method 302 of MIL-STD-202 and must begreater than 10 megohms after 500 Vdc have been applied between the coil terminations for aperiod of 10 to 15 seconds. Unacceptable damage to insulation may result if more than 60 secondsof cumulative test time is imposed.

12

433 Coil resistance. The resistance of each coil of the valve shall be measured separatelyafter the valve has been filled with fluid that has been allowed to stabilize at room temperature.A resistance/temperature correction may be required in order to compare the measured values tothe resistance value required by the applicable specification sheet at design conditions.


MLV-24722[SH)

436 “IkkctricstnzngthThe dielectric strengthof the valve shall be tested in accordancewith method 301 of IWL-STD-202 by applying 450 volts alternating current (Vat) (rms) plus rateddesign voltage at 60 Hz between the coil terminations and the fluid filled servcuvalve body. Thefirst article test unit shall withstand this condition for a period of 60 mconds. Production unitsshall withstand quality conformance testing under this condition for a period of 5 to 15 seconds.Satisfactory performance shall be that no damage, arcing, breakdown, or leaking current in excessof 05 milliampere is present (see 6.7).

43.7 Magnetic field &&ts. The valve flow gain characteristic shall, when required by theapplicable specification shee~ remain within the required limits while being subjected to thespecified magnetic field conditions per section 70-Part 1 of DQD-STD-1,399.

43-8 Flow @m Each valve shall bc tested at pressure and fluid temperature conditionsrequired by the applicable specification sheet to generate torque motor curre@low gain curves.After cross-connecting the control pressure ports, increase torque motor current from zero to thefirst torque motor current test set ,point and then adjust supply pressure (P) until net valvepressure drop is within the limits allowed by the applicable specification sheet. No furthersemwalve adjustments shall ‘be made. Maintain pilot pressure level(PP) withinthelimitsrequiredby the applicablespecificationsheet.Measured flows at intermediate torque motor current levelsettings and at both the positive and negative rated torque motor current level slmli be withinlimits required by the specification sheet.

4.3.9 Rated flow. During the flow gain test (see 43.8), veri~ that the rated discharge flowfrom each control port is within the required limits of the applicable specification sheet at thespecified pressure and fluid temperature conditions.

43.10 Flow limit adjustments. During the flow gain test (see 4.3.8), verify that the flowcontrol limiting adjustments of the valve are operational throughout the specified range of flowsand satis~ the requirements of the applicable specification sheet at specified pressure and fluidtemperature conditions.

43.11 Internal leakage Control ports Cl and (22 shall be initially cross-connected and torquemotor current oscillations reduced from 2S percent to zero before blocking Cl and C2 andremoving the torque motor signal. Fluid temperature shall be maintained within the limits requiredby the applicable specification sheet. Pilot pressure (PP) and main pressure (P) shall be set inaccordance with the applicable specification shee~ Internal leakage over a period of 3 to 5 minutesshall not exceed the allowable limit of the applicable specification sheet.

43.12 Null kp Pressures, temperature and torque motor current shall be set perrequirements of the applicable specification shee~ Testing and evaluation shall be performed inaccordance with SAE ARP 490. Zero-flow cylinder port pressures (Cl and C2) shall be within theallowable limits of the applicable specification sheet.


MIL-V-24722(SH)

43.13 Hysteresis. Pressures and fluid temperature shall be set in accordance withrequirements of the applicable specification sheet. The valve output measurement proceduresspecified by the applicable specification sheet shall be followed while varying the servo inputcurrent between the required limits. Hysteresis shall not exceed the percent of the maximum ratedcurrent required by the applicable specification sheet.

43.14 Threshold. The amount of control signal current required to cause a detectable valveoutput reversal shall not exceed the percent of maximum rated current allowed by the applicablespecification sheet.

43.15 Pressure gain. The pressure gain slope, as defined in SAE ARP 490, shall be greaterthan the value specified in the applicable specification sheet. The pressure gain shall be calculatedin terms of percent of load pressure drop divided by percent of maximum rated current at 40percent of maximum load pressure drop in both the positive and negative torque motor currentdirections with control ports blocked.

43.16 Amplitude ratio. A signal generator capable of supplying a pure sine wave input withan amplitude of not less than 25 percentof ratedinputcurrentabout electricalnullshallbe setup in accordancewith SAE ARP 490 to drivethe servovalve.The ratioof the measured valveoutput amplitudewith respectto the amplitudeof the inputcommand signalover a frequencyrangespecifiedintheapplicablespecificationsheetshallbe plottedon a Bode diagram.Thisdatashallsatis~the requirementsof the applicablespecificationsheet.

43.17 Phase lag. The phase angle response of the valve output with respect to the inputcommand signal shall satisfy the requirements of the applicable specification sheet within thefrequency range required by the applicable specification sheet when utilizing the same equipment,input signal and Bode diagram as used in the amplitude ratio test (see 4.3.16).

43.18 Noise test

43.18-1 F~t article noise test When required, the valve shall be subjected to astructureborne noise test in accordance with MIL-STD-740-2 and the requirementsof theapplicablespeci13cationsheet (see 6.3).The descriptionof the testprocedure,facility,andmeasurement systemmust have NAVSEA approvalin advance of the test(see6.3).Ifthevalvefailsto meet firstarticletestrequirementsforreasonsotherthansealreplacement,thecontractorshallident@ the causeof failureand recommend correctiveaction(see6.3).

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MILV-24722(SH)

43.182 Quality conformance noise teat Valves that have specified noise levels shall beassembled and tested with their subplate (see 6.3). A production series of 10 or fewer valves thathave a specified noise level shall require full compliance structur+orne noise testing of each valve.A production series shall be defined as valves with same spoo!/sleeve assembly and same flowrequirements. A production series of more than 10 valves that have a specii%cl noise level shallbe sampled for quality conformance structurebome noise testing according to the followingsampling procedure:

a. Unless otherwise specified in the specification sheet or contrac~ 3 valves chosen atrandom by the Government from each productionseriesshal~be tested(wheremorethan one configuration exists within a production series at least one of eachconfiguration must be tested).

b. If a~l 3 valves tested passed the noise test, use a sampling plan in accordance withMIMT.D-105, general inspection level, II.

c-. If one of the valves tested failed the noise test and required rework other than sealreplacernenh then the next five valves shall be tested. Tbe 5 valves must pass the noisetest to implement the sampling plan from MIL-STD-105.

c1. If any of the 5 valves tested failed, then the process is repeat~ starting from step (c],until the requirement is met

Each valve shajl be installed and instrumented in accordance with MIL-STD-740-2 With the valveoperated in offiet positions of 5, ‘1O,25, 50, 75, and 100 percent of maximum rated torquemotorcurrent on either side of neutral, record the strm.mreborne noise levels for the valve in eachone-third octave band and flow position for test conditions specified in the applicable specificationsheet. When required by the applicable specification shee~ the narrowband (1/10 octave)structureborne noise level shall also be recorded for the noisiest offket position associated witheach of the test conditions. The peak transient noise produced when shifting from each positionto every other position, with the valve adjusted for the maximum rated flow, shall be recordedwhile monitoring the broadband viiration level (10 HZ - 10 kilohertz (kHz). The shift time shailbe within the requirements specified in the applicable specification sheet. Valves shall meet thestructureborne noise level requirements specified in the applicable specification sheet. The causeand corrective action associated with valve repair required to correct unacceptable noise levelsshall be identified for each valve tested (see 63).

43.19 Maintainability demonstration trot. Conformance to the requirements specified in 3.9shall be demonstrated. The demonstration shall include MTT’R and ease of disassembly/assembly.Failure to comply with any or aMof the specified requirements shall result in rejection.

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MIL-V-24722(SH)

4320 Endurance The valve shall be subjected to an endurance test of 2,000,000 cycles withperiodic measurement of valve characteristics in accordance with the applicable specification sheetat intervals of 25, 50, 75, and 100 percent throughout the duration of the test. The duty cyclecharacteristics shall be defined and administered in accordance with the applicable specificationsheet. Replacement of any operating parts, with the exception of filters or screens at 25, 50, and75 percent test completion; shall constitute a failure of the test.

43.21 Shock. The valve shall be subjected to a shock test in accordance with therequirements of MIIAW?D-2193, unless otherwise specified in the applicable specification sheet.

43.22 Vibratiom The valve shall be filled with hydraulic fluid and subjected to a vibration testin accordance with the requirements of MIL-STD-2193, unless otherwise specified in the applicablespecification sheet.

4323 Temperature and pressure sensitivity. When required by the applicable specificationsheet, the valve shall be subjected to above and below normal temperature and pressure operatingconditions to monitor and assess its temperature and pressure sensitivity.

432?4 Contamination sensitivity. The “testcomponent” shall be replaced with a test valveloop in the MIXA3TD-2193 test circuit. The test valve loop shall consist of test valve, by-pass loopand isolation valves. The isolation valves shall be located before and after the test valve and inthe by-pass line. The MIL-STD-2193 test circuit shall be initially cleaned to the level required bythe applicable specification sheet while operating in the by-pass mode with the test valve isolated.After the system has been cleaned to the prescribed level, and the filter placed on-line, the valveshall be actuated at 6 cycles per minute (c/m) for 60 minutes. Flow, pressure and temperatureoperating requirements shall be in accordance with the applicable specification sheet. At thecompletion of the run-in period, the valve performance criteria required by the applicablespecification sheet shall be measured. The filter shall then be by-passed and the first contaminantsample shall be injected. The valve shall remain in the continuous flow position without cyclingfor 30 minutes. Valve performance shall be re-measured and be within the allowable limits requiredby the applicable specification sheet. Then the filter shall be replaced on-line and the systemoperated in the cleaning mode for 30 minutes. The sequence shall be repeated until allcontaminant samples have been injected.

43-25 Salt fog. Valves and subplates shall be subjected to a salt fog test in accordance withthe requirements of MIIAWD-2193.

43.26 Fatigue test. Valves and subplates shall be subjected to a fatigue test in accordancewith the requirements of MIL-STD-2193, unless otherwise specified in the applicable specificationsheet.

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MILV-24722(SH)

4327 F~ article noise retes~ At the conclusion of the contamination sensitivity test andother tests required by the applicable specification sheet. the valve shall be retested forst.rwtureborne noise in accordamx with 43.18. If the unit’s noise level has increased above theapplicable specifkation sheet allowable levels, the contractor shall use additional narrow band noiseevaluation techniques before proceeding to disassemble the uni< check dimensions, and so forth,to determine why the noise level increased,. The fiidings shall be verified by replacing orrefurbishing, as requir~ until a successful noise test can be completed (see 6.3). The Governmentwill have the option of requiring further testi,ng before the first article test is considered to besatisfactorily completed

4&23 Burnt p~ test. When a burnt test is specified in Iieu of the fatigue test (see4.3.26), the valve and subplate assembly shall be hydrostaticd~y tested to the pressure test levelsof the applicable specification sheet, and in mxordanee with the requirements and acceptancecriteria of MIL-STD-2193.

4.4 Inspection of paclmgin~ Sample packs, and the i,nspect,ion of the presemation, packingand marking for shipment and storage shall be in accordance with the requirements of section 5and the documents specified herein.

5. PACKAGING

me packaging requirements specified herein apply only for direct Government acquisition Forextent of applicability of the packaging requirements of referenced documents listed “h section 2,S= 6.&7.)

5.1 Packaging requirements. Valves shall be presaved level ,& C, or commercial, packedlevel &B, ~ or cam,mercial, marked in accordance with ME-V-3, and shall include bar codes andapplicable packaging acquisition options therein as specified (see 6.2). In addition, for Navyacquisitions, the following applies:

a. Navy shipboard stowage fire-retardant requirements

(1) Treated furnber andp&woud Unless othemise specified (see 6.2),all lumber and plywood including laminated veneer material usedin shipping conta~iners and pallet construction, members, bbckin~bracing, and reinforcing shall be fire-retardant treated materialconforming to MIL-L1914Q as follows:

Levels A and B - Type II - weather resistantCategory I - general use

Level C - Type I- non-weather resistantCategory I - general use.


MIL-V-24722(SH)

(2) Fiberboard Unless otherwise specified (see 6.2), fiberboard usedin the construction of classdomestic, non-weather resistantfiberboard and cleated fiberboard boxes including interiorpackaging forms shall meet the flamespread and the specific opticdensity requirements of PPP-F-320 amendments thereto.

52 Critical close tolerance equipment. In addition to any presewation and packagingrequirements specified by the product specification or packaging requirements code, equipmentswhich are identified to MIL-STD-740 shall be protected against damage resulting fromenvironmental conditions, multiple handling and the hazards of transportation (rough handling,shock vibration, and so forth). Shipping containers or method of packing utilizing shock and/orvibration mitigation systems shall only use mounts which have “captive features” incorporated intheir design. Unit packs and shipping containers shall be marked as specified in 5.2.1.

5.21 Critical close tolerance equipmen~ Unit packs and shipping containers and unpackedshipments shall be marked with the following

cRITIcAL

CLOSE TOLERANCE OPERATING EQUIPMENTHANDLE WITH CAREDO NOT DROP OR SUBJECT TO SHOCKS OR JARS

Markings,includingarrowsand theword “UP,”shallbe stenciled,red color,and applkxlon twosidesand both ends of the containeror shipment,lettersshallbe of minimum 1 1/2”high,exceptforsmallcontainerswith insufficientspace,in which case lettersshallbe of such sizeas to belegible.

6. NOTES

(This section contains information of a general or explanatory nature that maybe helpful, but isnot mandatory.)

6.1 Intended use. Valves and subplates covered by this specification are intended for use inshipboard hydraulic systems utilizing petroleum base hydraulic fluids. With proper selection ofpreservative fluid, the valves and subplates can be used in hydraulic systems utilizing otherhydraulic fluids compatible with MIL-R-83248 seals.

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MI.LV-24722(SH)

6.2 Acquisition requirements. Acquisition documents must specify the following

a.

b.

c.

d.

e.

f-

g“

h.

TWe, number and date of this specification

Issue of DODISS to be cited in the solicitation, and if required, the specific issue ofthe individual documents referenced (see 21.1 and 2.2)

Qu a n t i t yo f i t emsrequired with applicable standard part number (see applicablespedlkation sheet)

Requirements for first article testing (see 3.2)

When fire-retardant treated materials are not required (see 5.1)

Level of packaging, packing and marking required (see 5.1)

Nameplate data

Prescnmtive fluid if other than I’vfILH-6083 for petroleum based systems.

6.3 Consideration of data requirements The foIknv@ data requirementsshouki bemnsidered when this specificationisapplied on a contrac~ The applicable Data Item Descriptions(DIDs] should be reviewed in conjunction with the specific acquisition to ensure that only essentialdata are reque+sted/provided and that the DIDs are tailored to reflect the requirements of thespeeific acquiitiom To ensure correct contractual application of the data requirements, a ContractData Requirements List (DD Form 1423) must be prepared to obtain the data, except whereDOD FAR Supplement 27.475-1 exempts the requirement for a DD Form 1423.

Reference paragraph DID number DID title suggested tailoring

3.5 DI-DRPR-8Q651 Engineering drawings

421 UDI-T-23790 First article t=t report

4.22 DI-T-2072 Test reports

4..3.18.1 DI-H.FAC-80273 Equipment structureborne -viimtory accelerationmeasurement plan


MIL-V-24722(SH)

Referen= paragraph DID number DID title suggested tailoring

4.3.18.1, DI-HFAC-80271 Sound test failure4.3.18.2 and 4.3.27 Notification and

recommendation report

6.3 DI-T-23731 Notification of tests —

4.3.18.1 and 4.3.18.2 DI-HFAC-80274 Equipment structureborne –vibratory accelerationmeasurements test report

The above DIDs were those cleared as of the date of this specification. The current issue of DOD501O.12-L, Acquisition Management Systems and Data Requirements Control List (AMSDL), mustbe researched to ensure that only current, cleared DIDs are cited on DD Form 1423.

6.4 Technical manuals. The requirement for technical manuals should be considered whenthis specification is applied on a contract. If technical manuals are required, military specificationsand standards that have been cleared and listed in DOD 5010.12-L, Acquisition ManagementSystems and Data Requirements Control List (AMSDL) must be listed on a separate ContractData Requirements List (DD Form 1423), which is included as an exhibit to the contract. Thetechnical manuals must be acquired under separate contract line item in the contract.

6.5 Provisioning. Provisioning Technical Documentation (PTD), spare parts, and repair partsshould be furnished as specified in the contract.

65.1 When ordering spare parts or repair parts for the equipment covered by thisspecification, the contract should state that such spare parts and repair parts should meet the samerequirements and quality assurance provisions as the parts used in the manufacture of theequipment. Packaging for such parts should also be specified.

6-6 Fmt article. When first article inspection is required, the contracting officer shouldprovide specific guidance to offerors whether the item(s) should be a preproduction sample, a firstarticle sample, a first production item, a sample selected from the first production items, a standardproduction item from the contractor’s current inventory (see 3.2), and the number of items to betested as specified in 4.2.1. The contracting officer should also include specific instructions inacquisition documents regarding arrangements for examinations, approval of first article test resultsand disposition of first articles. Invitations for bids should provide that the Government reservesthe right to waive the requirement for samples for first article inspection to those bidders offering

20


MILV-24722(SH)

a product which, has been previously acquired or tested by the Government, and that biddersoffering such products, who wish to rely on such production or tes$ must furnish evidence with thebid that prior Govemmen~ approval is presently appropriate for the pending contract. ‘Biddersshould not submit alternate bids unless specificdy requested to do so on the solicitation.

6-7 Material safety precautio~ ?%e dielectric strength test of 4.3.6 is degrading and is notto be applied to del~wered valves. If a dielectric strength test is to be applied at valve overhaul theapplied voltage shall be in accordance with tbc original manfacturer’s recommendations but not lessthan 500 volts.

68 Sulxzmtracted material and_ TIE packaging requirements of referenced documentslisted in, section 2 do not apply when material and parts are acquired by the contractor forincorporation into the equipment and lose their separate identity when the equipment is shipped.

6S Subjectterm(keyword)kiting.

HydraulicQ t i e tOperationTorquemotor

Preparing activity:NAVY - SH

(l%ojed 4810-N075)

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MIL-V-24722(SH)

APPENDIX

Engineering Drawings Technical Content Requirements

10. scope.

10.1 Scope. This appendix covers the technical requirements that shall be included ondrawings when required by the contractor order. This appendix is mandatory only when data itemdescription DI-DRPR-80651 is cited on the DD Form 1423.

20. Applicable Documents

(This section is not applicable to this appendix.)

30. Drawings

30.1 Assembly Drawings- When required by the contract or order, assembly drawings shallshow a cutaway section of details and subassemblies. The following data shall be furnished on, ortogether with, the assembly drawings:

:c.d.e.f.g“h.i.j.k.1.m.n.o.

Outline dimensions of complete valve assemblyDimensional locations of all portsDimensional locations and sizes of all mounting holesDimensional locations and sizes of all valve-to-subplate interfacesCross-sectional views of regulating, metering and adjustment assembliesInternal porting and flow pathsPort identification markingsLocation of nameplates and indicator platesTorque requirements for all fastenersComplete list of all parts and their material of construction and part numberDetails of new or nonstranded materials and processesFluid power symbol of the valve in accordance with ANSI Y32.1OIdentification of subassemblies which require match marks to avoid improper assemblyCross-sections of electrical devicesElectrical circuits, connector pin/key orientation, electrical parameters, and operationalrequirements.

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