mankenberg float valves

Level Control Valves

Float Valvesfor Installation in Tanks

Compact stainless steel valvefeed or drain valvefor use as feed valve only in closed tanksall stainless steel SST 316 constructionPN......p.........Kvs......

160 - 2, 0 - 4, 0 - 8 bar0.3 - 21 m3/h

G......... G 3/8 - 1 1/2AT..........130/300 C

NV 94

NV 98 Universal Valvefeed valve for open or closed tanksavailable with parallel guideall stainless steel SST 316 constructionPN......p..........Kvs......

160 - 2, 0 - 4, 0 - 8 bar0.3 - 82 m3/h

DN...... 40 - 80G.........T..........

3/8 - 1 1/2A130 C

Standard feed valve, cast bodyNV 12P with parallel guidebody grey cast iron, spheroidal cast ironPN.......p..........Kvs......

160 - 2, 0 - 4, 0 - 8 bar2.8 - 195 m3/h

DN.......T..........

20 - 150110 C

NV 66e Large Capacity, stainless steelfeed or drain valveall stainless steel SST 316 constructionPN.......p..........Kvs......

Large Capacity, cast body

16 DN...... 20 - 1500 - 2, 0 - 4, 0 - 84 - 100 m3/h

T.......... 80/130 C

NV 12

NV 16feed or drain valveNV 16 single seat, NV 16e single seat balanced, NV 26 double seatbody grey cast iron, spheroidal cast iron, cast steelPN.......p..........

DN.......

16 - 40NV 16: 0 - 1, 0 - 4 bar NV 16e: 0 - 16 barNV 26: 0 - 1, 0 - 4, 0 - 16 barNV 16: 15 - 100 NV 16e: 15 - 150NV 26: 125 - 400

Kvs...... 2.6 - 1800 m3/h T..........130 C

Mankenberg GmbH Spenglerstrae 99 D-23556 Lbeck Tel. +49-451-8 79 75 0 Fax +49-451-8 79 75 99 [email protected] www.mankenberg.de

WIR REGELN DAS SCHONFIRMLY IN CONTROLWIR REGELN DAS SCHON

12P

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Float Valvesfor Pipelines

16e26

Top Seller

Top Seller

Special versions on request. All the pressure has always been indicated as overpressure. We reserve the right to alter technical specifications without notice.

Float Valvesfor Installation at Tanks

Large Capacity, stainless steelfeed or drain valve, single seat balancedall stainless steel SST 316 constructionPN......p.........Kvs......

160 - 16 bar4 - 100 m3/h

DN......T..........

15 - 100130 C

NV 67e

NV 71 Direct feed or drain valvethe tank is filled or drained via the mounting flange on the tankbody steel, stainless steelPN......p.........Kvs......

Large capacity, cast body

10 DN...... 25 - 1500 - 2, 0 - 4, 0 - 8 bar1.6 - 81 m3/h

T.......... 110 / 300 C

NV 55vertical flow directionNV 55 single seat, NV 55e single seat balancedNV 56 double seatbody grey cast iron, spheroidal cast iron, cast steelPN.......p..........

DN.......

16 - 40NV 55: 0 - 1, 0 - 4 bar NV 55e: 0 - 16 barNV 56: 0 - 1, 0 - 4, 0 - 16 barNV 55: 15 - 100 NV 55e: 15 -150

DN....... 15 - 150

Kvs......

NV 36SF For flammable liquidsNV 36SF body cast steelPN.......p..........Kvs......

NV 56: 125 - 4002.6 - 1800 m3/h T..........130 C

160 - 4, 0 - 16 bar11 - 230 m3/h

DN....... 32 - 200T.......... 80 C

For systems fitted with accumulatorscompressed air shutoff valve for water supply systemsfitted with accumulatorbody steel, stainless steelPN......p.........v..........

10 - 160 - 8 barmax. 1.5 m/sec flow velocity

DN...... 15 - 200T..........80 C

NV 80

Level Control Valves


WIR REGELN DAS SCHONFIRMLY IN CONTROL

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Overfill Preventer Valvewith PTB approval

Compressed Air Shutoff Valvefor Drinking or Industrial Clean Water supplies

82

55e56

Special versions on request. All the pressure has always been indicated as overpressure. We reserve the right to alter technical specifications without notice.

Know how Float ValvesS

heet

. no.

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Level controller or float valveYou should use a level controller with float chamber if the floatcannot be mounted in the vessel. It is mounted in the pipelineand connected to the vessel by means of balancing lines. Float valves have no float chamber. The float is always moun-ted in the vessel.

Feed and drain valves Feed valves (code letter "Z") close as the float rises and pre-vent overflowing. Drain valves (code letter "A") close as thefloat sinks and ensure that the liquid level does not drop belowthe required level.

Mounting of float-controlled valves - Float valves for installations in vessels are mounted

inside the vessel complete with float. - Float valves for installation on vessels are flange-

mounted on the outer skin of the vessel. - Float valves for installation in pipe lines are installed in the

feed/drain pipe. The float lever either projects into the vessel or the float move-mens is transferred by means of a cable.

Flow direction of float valves The flow direction determines the mounting arrangement andtype of float lever used:- horizontal, flow direction towards or away from the vessel

code letter "w"- vertical, flow direction upwards

code letter "o") - vertical, flow direction downwards

(code letter "u")

Selecting valve type and nominal diameter To select the valve type and determine the required nominaldiameter you should calculate first the operating performanceparameter Kv based on the maximum operating values and mi-nimum pressure drop Dp. You should choose a valve having aKvs value which is 30 % greater than the calculated Kv figure.

Selecting the operating pressure range The maximum operating pressure of your system must bewithin the operating pressure range of the valve; if not, thefloat valve will not close or open.

Pressure inside the vessel Check whether the vessel in which the float is to be mounted isnot pressurised. If the vessel is pressurised a pressure-resi-stant ball float has to be fitted. Cylindrical floats may only beused in non-pressurised vessels.

Temperature If the valve is to be used for temperatures above 80 C or a li-quid other than water, the compatibility of the elastomers mustbe checked. For hydrocarbons like gasoline, petrol etc., for ex-ample, the valves are fitted with FPM elastomers, whilst forhigher temperatures they are fitted with EPDM or, if necessary,with a metallic cone seal.

Adapting the float Float valves are normally designed for media with the specificgravity of water. By choosing a different float geometry, by fil-ling the float or by altering the operating pressure range, wecan adapt the floats to other media.

Balance and double seatSingle seat non-balanced float valves are used for low pressu-res. They are relatively insensitive to contamination and dirtdeposits.Single seat balanced valves can be used for larger pressuredrops and feature smaller floats. Double seat valves are specially suitable for large flow rates.

Overflow preventers A special product are the PTB-approved overflow preventersTypes 36S and 36SF. These are mechanical safety devices forflammable liquids.

Seat leakage Level controllers and float valves are control valves which arenot required to provide a leak-proof seal (VDI/VDE Guideline2174). For leakproof shutoff, shut-off valves must be used.Normally our valves leave the factory with perfectly leakproofvalve seats. During operation, however, solid particles (e.g.sand, welding nuggets etc.) often cause damage and seat lea-kage. Any low leakage requirement must be expressly speci-fied when ordering. Valve leakage can be considerably redu-ced by special measures such as lapping the valve seat, usingspecial cone seals and increasing the valve closing force bychanging the lever geometry or increasing the size of the float.

Adjustable filling level In the case of valves fitted with float rod and adjustable float,the level in the vessel can be adjusted by sliding the floatalong the rod.

Float rod guideFor float rods a guide must be provided in the vessel to pre-vent the float oscillating. Float valves with parallel guide orspecial designs featuring a top-mounted float do not require arod guide.

Level controllers and float valves control the liquid level in a vessel



Know how Float Valves

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Operation Make sure that no pressure surges or water hammer occur inthe system, which could destroy the float. In the case of foa-ming media and the resulting reduction of the specific gravity,a float valve cannot operate reliably. In this case a foam abate-ment circuit should be provided.

Maintenance Float valves and level controllers should be cleaned and servi-ced at regular intervals. This rule applies especially to valveswhich are rarely operated e.g. valves fitted in sprinkler sy-stems. Thorough cleaning is important in the case of liquids containingsubstances which easily form deposits (such as iron, lime, sus-pended solids etc). Sand and abrasive particles carried along in the liquid can cau-se rapid wear. Please ask for specially adapted valves.

Valves free of oil and grease or siliconePlease pay attention to order an fit only spares free of oil andgrease resp. free of silicone.

Please consult our engineer if extreme operating conditi-ons apply or whenever you are in doubt.

Notes on Safety, operarting instruction etc. MUST be fol-lowed

Samples of installation for inflow valvesfor installation in vessels

for installation in pipelines, horizontal installation

for installation in pipelines, vertical installation

for installation at tanks

Overflow preventer for flammable liquids

Pilot operated float valve

Legend

Level controllers and float valves control the liquid level in a vessel

float valve

float valve pilot operated

shut off valve

shut off valve



Selection Float ValvesS

heet

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for installation in vesselsFlow directionW S E

Operatingpress. bar

Kvs-valuem3/h

P P

P

P

88

2.80.3

8 0.3

--

19521

- 82

for installation in pipelinesFlow directionWP

SP

E

P

P

P

P

P

P

Operating Kvs-valuepress. bar

4m3/h

3 - 801640

44

40 46

--

100160

- 1800

Connectionscrewed flanged DN

3/8 -3/8 -

1 1/220

1 40

****

SS

- 150

- 80**** P

**** P


151515

125

- 100

SS****

--

100150

- 400

**** P

Notes Type

inflow valve made of GG-25inflow or outflow valve, inflow only for closed vessels

1294

inflow or outflow valve, for open or closed vessels 98

Notes Type

economical valve up to 4 bar 16economical stainless steel valve, single seat, balancedstandard valve, single seat, balanced

66e16e

double seat 26

for installation on vesselsFlow directionWP

SP

E

P

P

P

P

P

P

P

Operating Kvs-valuepress. bar

4m3/h

3 - 808

1624

4040

446

--

81100

--

1601800

Pilot controlled float valvesFlow directionW S EP

Level regulatorsFlow direction

P P

Operatingpress. bar

Kvs-valuem3/h

40 20

Operating Kvs-value

- 3200


15251515

125

- 100

SS****

-100100

--

150400

****

**** P


Connection

50****

SS

- 600

SS

Notes Type

economical valve up to 4 bar 55direct feed or drain through the mounting flange at the vesseleconomical stainless steel valve, single seat, balanced

7167e

standard valve, single seat, balanceddouble seat

55e56

Notes Type

Design and price on request 8,50

Notes TypeW S

P

E

P

P

Overflow ProtectionFlow directionW S E

press. bar10

m3/h

1016

0.40.43.3

Operatingpress. bar

Kvs-valuem3/h

Compressed Air Shutoff Valves

P

P

Flow directionW S E

P

P

1616

1111

--

230230

Operatingpress. bar

Kvs-valuem3/h

88

22

--

510510

screwed1/2

3/41/2-

flanged DN

1 20


- 25

****

**** P

****

****

P

P

****

SS

3232


1515

--

200200

--

200200

****

SS

WSE

= horizontal==

verticalangled

small level regulator 10small level regulator with sight glasslevel regulator for higher flow rates

1160

Notes Type

with PTB approval for flammable liquids, body grey cast ironwith PTB approval for flammable liquids, body cast steel

36S36SF

Notes Type

safety device for waterworks with pressure vessel (compressed air) safety device for waterworks with pressure vessel (compressed air)

8082

**** other connections available P stainless steel deep drawn







Special designs on request. The pressure has always been indicated as overpressure.Mankenberg reserves the right, to alter or improve the designs or specifications of the products described herein without notice.



Level Control Valves NV 12, 12P

DescriptionFloat valves automatically control liquid levels in sealed or open(non-pressurised) tanks and vessels without requiring externalenergy. The float registers the liquid level and directly controls thevalve via a lever. A change in the liquid level immediately results ina changed flow volume.

The NV 12 and NV 12 P float valves are standard inlet (feed) val-ves for installation in tanks; they are made of cast iron. The valvecone is fitted with a soft seal.

The following note applies to float valves fitted with float bars:If the liquid level is below the float bar i.e. if the float points down-wards, a guide for the float bar should be installed.NV 12P is fitted with a parallel guide which prevents float oscillati-on if a float bar guide is not fitted in the tank.

Please state working pressure range when enquiring or ordering.

STANDARD EQUIPMENT Ball or cylindrical float (see overleaf) NV 12P with parallel guide

OPTIONS Various seal materials suitable for your medium

Operating instructions, Know How and Safety instructions must beobserved.The pressure has always been indicated as overpressure.We reserve the right to alter technical specifications without notice.

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Technical DataConnectionNominal Pressure

DN 20 - 150PN 16

Kvs-valueDesign

2.8 - 195 m3/hfeed valvehorizontal inflow

for installation in vessels with or without parallel guideup to 110 C

Kvs-values [m3/h]nom. dia. DNKvs-value m3/h

20-252.8

32-409.5

5012

6525

8044

10070

125110

150195

Pressure Ranges [bar]operating pressure [bar] 0 - 2 0 - 4 0 - 8



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*only for type 12 DN 20 + 25 working pressure ranges 0 - 2 and 0 - 4 bar.(without float rod)

parallel guidefor type 12P

MaterialsBody

Cone

up to DN 25 grey cast ironfrom DN 32 spheroidal cast iron

CrNiMo-steelCone GuideSeatValve SealFloat Rod

grey cast irongrey cast ironEPDMCrNiMo-steel

Float CrNiMo-steel

Dimensions [mm]

sizenominal diameter DN

20 25 32 40 50 65 80 100 125 150ABCE

35068

35068

10030

10030

45588

45588

12540

12540

47095

610104

14050

17050

710113

875135

18060

22560

1160165

1350180

310100

350100

FG

555

555

805

805

8010

8010

10010

10020

10020

10020

Weight without float [kg]nominal diameter DN

20 25 32 40 50 65 80 100 125 1501.8 2 4.5 5 7 9 11 18 27 35

Float Dimensionpressure

rangenominal diameter DN20 25 32 40 50 65 80 100 125 150

bar0 - 20 - 4

ball float SR 3 in mm *160 160160cylindrical float SR 8 = height in mm

160

0 - 20 - 40 - 8

--

--

200 200

200200

200200

200 200

200200

200240

240 280

240240

240280

280 340

280305

305340

380 420

G

C

A

F

BE

Level Control Valve NV 12, 12Pfor installation in vessels with or without parallel guideup to 110 C

Special designs on request.The pressure has always been indicated as overpressure.Mankenberg reserves the right, to alter or improve the designs or specifi-cations of the products described herein without notice.



Level Control Valves NV 16, 26

DescriptionThe NV 16 and NV 26 float valves automatically control liquidlevels in sealed or open (non-pressurised) tanks and vessels wi-thout requiring external energy. The float registers the liquid leveland directly controls the valve via a lever. A change in the liquidlevel immediately results in a changed flow volume.

NV 16 and NV 26 are pipeline valves for horizontal or vertical flow.The standard soft seal ensures perfect sealing of the valve. Thevalves are fitted with a float bar on which a float featuring an innertube is mounted (cylindrical float SR 8). By changing the positionof the float on the bar the required liquid level is infinitely variable.The following note applies to float valves fitted with float bars:If the liquid level is below the float bar i.e. if the float points down-ward, a guide for the float bar should be installed.

When enquiring or ordering please quote the suffix letters givenbelow:Z = Inlet. Valve closes when float risesA = Outlet. Valve closes when float dropsw = Horizontal flowo = Upward flowu = Downward flowExample: Float valve NV 16Z/w (inlet valve for horizontal flow).

STANDARD EQUIPMENT Float bar stainless steel Cylindrical float SR 8 stainless steel

OPTIONS Rubber or plastic coating for corrosive media Various seal materials suitable for your medium


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Technical DataConnection NV 16

NV 26::

Nominal Pressure

Operating Pressure

DN 15 - 350DN 400

::

NV 16NV 26

::

DN 15 - 100DN 125 - 400PN 16 - 40PN 10 - 16up to 4 barup to 16 bar

Kvs-valueDesign

2.6 - 1800 m3/hNV 16 :NV 26 :

single seatdouble seat

Float Valve, single seated, balanced, installation in pipelinesfor liquids up to 130 C

Please state working pressure range, when inquiring orordering

Pressure Ranges [bar] and Kvs-values [m3/h]Type

press. rangeNV 16nominal diameter DN

bar0 - 10 - 4

152.6

203.5

2.6 3.5

253.5

325.7

3.5 5.7

407.6

5015

7.6 7.6

6527

8047

15 27

1008047

Pressure Range [bar] and Kvs-values [m3/h]Type


bar000

- 1--

416

125140

150230

8446

14084

200380

250570

230140

380230

3001000

3501000

570380

570380

40018001000570

NV 16

NV 26



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MaterialsBody PN 16 up to DN 25 grey cast iron

from DN 32 spheroidal cast iron

Cone and SeatCone Guide

PN 25 - 40PN 16 - 40

cast steeloptional CrNiMo-steel *Cr-steel optional CrNiMo-steelgun metal optional CrNiMo-Stahl

Valve SealLinkageFloat RodFloat

EPDMsteel zinced or steel, optional CrNiMo-steelCrNiMo-steelCrNiMo-steel

*dimensions and weights see sheet no. SR/2.1.041.1

A/w

Z/wB

CA

EF

D F

A

B

B

BC

FF

G

GZ/u, Z/o

A/u, A/o

Dimensions [mm] and Weights [kg] NV 16 PN 10/16*

size nominal diameter DN

15 20 25 32 40 50 65 80 100ABCD

130175

150175

55360

55360

160175

180195

55360

125480

200195

230195

125480

125480

290290

310290

105640

105640

350290105640

EFGkg

270315

270315

456

457

270315

360420

458

6011

360420

360420

6014

6019

480560

480560

8040

8048

4805608060



125 150 200 250 300 350 400ABCD

400325

480400

185760

200895

600440

730490

2101120

2501280

850540

980540

2901440

2901440

1100555385

1600EFGkg

570665

675785

9593

110128

840980

9601120

140198

160276

10801260

10801260

180480

180535

12001400200690

NV 16 necessary Cylindrical Float SR 8 [mm] ( = hight)*press. range

bar nominal diameter DN

15 20 25 32 40 50 65 80 10000

--

14

200240

200240

200240

200240

200280

240280

280305

280340

305420



125 150 200 250 300 350 400000

--

14

- 16

240280

305340

380 420

305340

340380

460 500

380420

380420

600 600

380460600

*dimension and weights see sheet no. SR/2.1.041.1

* up to DN 100 made of CrNiMo-steel use NV 66e

*PN 25/40 on request

*PN 25/40 on request

Level Control Valve NV 16, 26Float Valve, single seated, balanced, installation in pipelinesfor liquids up to 130 C




Level Control Valves NV 16e, 55e


NV 16e is a pipeline valve for horizontal or vertical flow. NV 55e isa pipeline valve complete with tank connecting flange for verticalflow. The valve cone is fitted with a soft seal. The valves are fittedwith a float bar on which a float featuring an inner tube is mounted(normally a cylindrical float type SR 8). By changing the position ofthe float on the bar the required liquid level is infinitely variable.The float of discharge valves must be provided with sand filling bythe customer.

The following note applies to float valves fitted with float bars:If the liquid level is below the float bar i.e. if the float points down-ward, a guide for the float bar should be installed.

When enquiring or ordering please quote the suffix letters givenbelow:Z = Inlet. Valve closes when float risesA = Outlet. Valve closes when float dropsw = Horizontal flowo = Upward flowu = Downward flowExample: Float valve NV 16e Z/w (inlet valve for horizontal flow).

STANDARD EQUIPMENT Float bar stainless steel Cylindrical float SR 8 stainless steel

OPTIONS Rubber or plastic coating for corrosive media Various seal materials suitable for your medium


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Technical DataConnectionsNominal Pressure

DN 15 - 150PN 16 - 40

Kvs-value 4 - 160 m3/h

Float Valve, single seated, balanced, installation in pipelines and at tanksfor liquids up to 130 C

Kvs-values [m3/h]nom. dia. Kvs-value

DNm3/h

154

205

256

4020

5032

NV 16e

NV 55e

Kvs-values [m3/h]nom. dia. Kvs-value

DNm3/h

6550

8080

100100

125140

150160

Dimensions [mm] and Weights [kg] NV 55e PN 16*


15 20 25 40 50 65 80 100 125 150ABCD

130180

150180

5595

5595

160180

200200

5595

125115

230200

290300

125115

105175

310300

350300

105175

105175

400340

480410

185235

200255

EF

DNWeights without float

21030

21030

100 100

kg 10 11

21030

28040

100 125

28040

42060

125 200

12 21 24 45

42060

42060

200 200

42060

49070

250 250

53 65 103 133



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MaterialsBody PN 16 up to DN 25 grey cast iron


Cone and SeatPiston and SpindleValve Seal

PN 25/40 cast steelgrey cast iron / Cr-steelCr-steelEPDM

LinkageFloat RodFloat

steel zinced / steelCrNiMo-steelCrNiMo-Stahl

Dimensions [mm] and Weights [kg] NV 16e PN 16*


15 20 25 40 50 65 80 100 125 150ABCD

130175

150175

55360

55360

160175

200195

55360

125480

230195

290290

125480

105640

310290

350290

105640

105640

400325

480400

185760

200895

EFG

Weights without float

270315

270315

45 45

kg 6 7

270315

360420

45 60

360420

480560

60 80

8 14 19 40

480560

480560

80 80

570665

675785

95 110

48 60 98 128* PN 25/40 on request

Necessary cylindrical float SR 8 [mm] ( = hight) *nom. diameterfloat

DNmm

15200

20200

25200

40240

50240

65305

80305

100305

125340

150340

*dimensions and weights see sheet SR 2.1.041.1

* PN 25/40 on request

A/w

NV 16e

NV 55e

tank add-on flangenominal diameter DN

Z/wB

CA

EF

DF

A

B

B

BC

FF

G

GZ/u, Z/o

A/u, A/o

Z/u, Z/o

A/u, A/o

A

B

BD

C

F

F

E

E

Level Control Valve NV 16e, 55eFloat Valve, single seated, balanced, installation in pipelines and at tanksfor liquids up to 130 C





DescriptionThe NV 55 and NV 56 float valves automatically control liquidlevels in sealed or open (non-pressurised) tanks and vessels wi-thout requiring external energy. The float registers the liquid leveland directly controls the valve via a lever. A change in the liquidlevel immediately results in a changed flow volume.

NV 55 and NV 56 are pipeline valves with tank connecting flangefor vertical flow. The standard soft seal ensures perfect sealing ofthe valve.

The valves are fitted with a float bar on which a float featuring aninner tube is mounted (cylindrical float SR 8). By changing the po-sition of the float on the bar the required liquid level is infinitely va-riable.


When enquiring or ordering please quote the suffix letters givenbelow:Z = Inlet. Valve closes when float risesA = Outlet. Valve closes when float dropso = Upward flowu = Downward flowr = includes sealed spindleExample: Float valve NV 55Z/o (inlet valve for upward flow).

STANDARD EQUIPMENT Tank connecting flange Float bar stainless steel Cylindrical float SR 8 stainless steel

OPTIONS Rubber or plastic coating for corrosive media Various seal materials suitable for your medium Spindle sealed against the tank (for example with Rieler plants)


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Technical DataConnection NV 55

NV 56::

Nominal Pressure

Operating Pressure

DN 15 - 350DN 400

::

NV 55NV 56

::

DN 15 - 100DN 125 - 400PN 16 - 40PN 10 - 16up to 4 barup to 16 bar

Kvs-valueDesign

2.6 - 1800 m3/hNV 55 :NV 56 :

single seatdouble seat

Float Valve, single and double seated, installation at tanksfor liquids up to 130 C


Pressure Range [bar] and Kvs-values [m3/h]type


bar0 - 10 - 4

152.6

203.5

2.6 3.5

253.5

325.7

3.5 5.7

407.6

5015

7.6 7.6

6527

8047

15 27

1008047

Pressure Range [bar] and Kvs-values [m3/h]type


bar000

- 1--

416

125140

150230

8446

14084

200380

250570

230140

380230

3001000

3501000

570380

570380

40018001000570

NV 56

NV 55



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tank add-on flangenominal diameter DN

Z/u, Z/o

A/u, A/o

A

B

BD

C

F

F

E

EDimensions [mm] and Weights [kg] NV 55 PN 10/16*


15 20 25 32 40 50 65 80 100ABCD

130180

150180

5595

5595

160180

180200

5595

125115

200200

230200

125115

125115

290300

310300

105175

105175

350300105175

EF

DNkg

21030

21030

10010

10011

21030

28040

10012

12519

28040

28040

12521

12524

42060

42060

20045

20053

42060

20065


sizenominal pressure

125 150 200 250 300 350 400ABCD

400340

480410

185235

200255

600460

730500

210295

250350

850550

980550

290380

290380

1100550385380

EF

DNkg

42060

49070

25098

250133

63090

700100

300222

350302

770110

770110

400510

400570

770110500725



15 20 25 32 40 50 65 80 10000

--

14

200240

200240

200240

200240

200280

240280

280305

280340

305420

NV 56 necessary Cylindrical Float SR 8 [mm] ( = hight)*Druckbereich

bar Nennweite DN

125 150 200 250 300 350 400000

--

14

- 16

240280

305340

380 420

305340

340380

460 500

380420

380420

600 600

380460600


*dimensions and weights see sheet no. SR 2.1.041.1

MaterialsGehuse PN 16 up to DN 25 grey cast iron


Cone and SeatCone Guide

PN 25 - 40PN 16 - 40

cast steeloptional CrNiMo-steel *Cr-steel optional CrNiMo-steelgun metal optional CrNiMo-steel

Valve Seal EPDM



Level Control Valve NV 55, 56Float Valve, single and double seated, installation at tanksfor liquids up to 130 C

* up to DN 100 made of CrNiMo-steel use NV 67e




Level Control Valves NV 66e, 67e


NV 66 and NV 67e are pipeline valves for tank mounting capableof handling large volumes. NV 66e is a pipeline valve for horizontalor vertical flow. NV 67e is a pipeline valve with tank connectingflange for vertical flow. Both valves are made from deep-drawnstainless steel featuring excellent corrosion resistance. The valvecone is fitted with a soft seal.

Top and bottom sections of the valve body are connected by aclamp ring and two bolts. Servicing/maintenance is easy and doesnot call for special tooling.

The valves are fitted with a float bar on which a float featuring aninner tube is mounted (cylindrical float SR 8). By changing the po-sition of the float on the bar the required liquid level is infinitely va-riable.


When enquiring or ordering please quote the suffix letters givenbelow::Z = Inlet. Valve closes when float risesA = Outlet. Valve closes when float dropsw = Horizontal flowo = Upward flowu = Downward flowExample: Float valve NV 66e Z/w (inlet valve for horizontal flow).

STANDARD EQUIPMENT Float bar stainless steel Cylindrical float SR 8 stainless steel Quick-release body clamp ring



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DN 15 - 100PN 16

Kvs-values 4 - 100 m3/h

Float Valve, single seated, balanced, installation in pipelines and at tanksfor liquids up to 130 C

Kvs-values [m3/h]nominal diameter DN

15 20 25 40 50 65 80 1004 5 6 20 32 50 80 100

NV 67e

NV 66e



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MaterialsBodyCone, Seat

CrNiMo-steelCrNiMo-steel

Piston, SpindleValve SealLinkageFloat Rod

CrNiMo-steelEPDMCrNiMo-steelCrNiMo-steel

Float CrNiMo-steel

Dimensions [mm]


15 20 25 40 50 65 80 100ABDE

160185

160185

360270

360270

160185

200220

360270

480360

230220

290325

480360

640480

310325

350325

640480

640480

FG

31545

31545

31545

42060

42060

56080

56080

56080

Weights [kg]nominal diameter DN

15 20 25 40 50 65 80 1005.8 6.2 6.5 14 14.5 28.5 30.5 31.5

Cylindrical Float SR 8 [mm] ( = height) *nominal diameter DNfloat mm

15200

20200

25200

40240

50240

65305

80305

100305

Weights [kg]nominal diameter DN

15 20 25 40 50 65 80 10011.5 12 15 22.5 23 44.5 46.5 47.5

Dimensions [mm]


15 20 25 40 50 65 80 100ABCF

160185

160185

125210

125210

160185

200220

125210

145280

230220

290317

145280

211420

310317

350317

211420

211420

GH

30DN 100

30DN 100

30DN 100

40DN 125

40DN 125

60DN 200

60DN 200

60DN 200


B

BC

A

G

F

G

F

A/u,A/o

Z/u,Z/o

NV 67e

Z/w

A/w

A/u,A/o

Z/u,Z/o

A

B B

F

FE

F

F

G

A

B

B

DNV 66e

G

H

H

Level Control Valve NV 66e, 67eFloat Valve, single seated, balanced, installation in pipelines and at tanksfor liquids up to 130 C




Level Control Valves NV 71


NV 71 is a pipeline valve for tank mounting complete with tankconnecting flange for direct inlet/outlet. The valve cone can be fit-ted with a soft seal (up to 110 C) or a metallic seal (up to 300 C).NV 71 is supplied with a ball float type SR 3 fixed to the float bar.

When enquiring or ordering please quote the suffix letters givenbelow:Z = Inlet. Valve closes when float risesA = Outlet. Valve closes when float dropsw = Horizontal flowo = Upward flowu = Downward flowExample: Float valve NV 71 Z/u (inlet valve for downward flow).

STANDARD EQUIPMENT SR 3 ball float stainless steel

OPTIONS Stainless steel construction all components stainless steel Rubber or plastic coating for corrosive media Various seal materials suitable for your medium


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DN 25 - 150PN 10

Operating PressureKvs-value

up to 8 bar, in 3 ranges1.6 - 81 m3/h

Single and double seated Float Valve, installation in pipelines and at tankselbow design, for liquids up to 110 / 300 C


Pressure Ranges [bar], Kvs-values [m3/h]

press. rangebar

nominal diameter DN25 32 40 50

000

--

24

- 8

5.13.3

105.1

1.6 2.9

158.7

2112

4.5 6.4

65 80 100, 125, 1503120

5735

10 17

814928

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8

MaterialsBodyCone, Seat

steel optional CrNiMo-steelgun metal optional CrNiMo-steel

Cone GuideValve SealLinkageFloat

Cr-steel optional CrNiMo-steelEPDM up to 110 C or metallic up to 300 Csteel optional CrNiMo-steelCrNiMo-steel

Dimensions [mm] and Weights [kg]


25 32 40 50 65 80 100 125 150ABCE

120125

140150

200310

240350

140150

140150

240380

240415

160170

175180

300495

310630

200200

200200

350775

350775

200200395775

Fball float SR 3

Weights

DN125 DN150

110 130

kg 10 15

DN150 DN150

160 200

DN200 D 200

220 250

17 19 41 44

DN250 DN250

280 280

DN250

280

58 60 62

from DN 40 float fitted through manhole

NV 71 A/u

NV 71 A/o

C

B

AE

F

AE

B

FC

NV 71 Z/u

NV 71 Z/o

B

AE

F

C

C

B

AE

F

Level Control Valve NV 71Single and double seated Float Valve, installation in pipelines and at tankselbow design, for liquids up to 110 / 300 C








NV 94 is a float valve for horizontal or vertical installation inside atank as inlet or outlet valve. This valve is made entirely of stainlesssteel featuring excellent corrosion resistance. The valve cone canbe fitted with a soft seal (up to 130 C) or a metallic seal (up to 300C). NV 71 is supplied with a ball float type SR 3 fixed to the floatbar.

When enquiring or ordering please quote the suffix letters givenbelow:Z = Inlet. Valve closes when float risesA = Outlet. Valve closes when float dropsw = Horizontal flowo = Upward flowu = Downward flowExample: Float valve NV 94 Zw (inlet valve for horizontal flow).

STANDARD EQUIPMENT All stainless steel construction SR 3 ball float stainless steel



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G 3/8A - 1 1/2A (Zapfen)PN 16

Kvs-value 0.3 - 21 m3/h

Float Valves for installation in closed vesselsup to 300 C


Kvs-values [m3/h]nom. diameter G .... Apress. range 0 - 2 bar

3/81.2

1/22.8

3/45.1

110

1 1/415

1 1/221

press. range 0 - 4 barpress. range 0 - 8 bar

0.70.3

1.90.9

2.81.9

5.12.8

8.74.4

126.4

Pressure Ranges [bar]0 - 2 0 - 4 0 - 8



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MaterialsBodyCone


Seat

Valve Seal

Float

CrNiMo-steelEPDM up to 130 Cmetallic up to 300 CCrNiMo-steel

Dimensions [mm]

sizenominal diameter G...A

3/8 1/2 3/4 1 1 1/4 1 1/2BCDE

956

13.575

1234

1642

15.575

19.597

1642

2055

24110

26120

2263

2563

FG

11043

16557

19057

22572

28580

32090

Weights [kg]nominal diameter G ... A

3/8 1/2 3/4 1 1 1/4 1 1/20.6 0.9 1.3 2 3.5 4.5

Dimensions Ball Float SR 3 [ mm]nominal diameter G ... A

3/8 1/2 3/4100 110 130

1 1 1/4 1 1/2150 180 200

D

GC

B F

Z/u

D

GC

BFA/u

D

GC

FBZ/o

Z/w, (A/w)

G

C

B E

FD

Level Control Valve NV 94Float Valves for installation in closed vesselsup to 300 C






NV 98 is a float valve for horizontal installation inside a tank as in-let valve with outlet at the bottom. This valve is made entirely ofstainless steel featuring excellent corrosion resistance. NV 98 R(spigot connection) is fitted with a SR 3 ball float, NV 98 F (flangeconnection) is fitted with a SR 8 cylindrical float that is adjustableon its float bar. NV 98 FP is fitted with a parallel float guide whichprevents oscillation of the float. The valve cone is fitted with a softseal.

The following note applies to float valves fitted with float bar:If the liquid level is below the float bar i.e. if the float points down-wards, a guide for the float bar should be installed.

When enquiring or ordering please quote the suffix letters givenbelow:R = Spigot connetionF = Flange connectionP = Parallel guideZ = Inlet. Valve closes when float risesu = Downward flowExample: Float valve tape 98 R Z/u (inlet valve with spigot connec-tion, downward flow).

STANDARD EQUIPMENT All stainless steel construction NV 98 R with ball float SR 3 NV 98 F with cylindrical float SR 8 NV 98FP with cylindrical float SR 8

and float bar parallel guide



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Technical DataConnection G 3/8A - 1 1/2 A (Zapfen)

DN 40 - 80Nominal PressureKvs-value

PN 160.3 - 82 m3/h

Float Valves for installation in vesselsup to 130 C


Kvs-values [m3/h]nom. diameter

0 - 2G..Abar

3/80.7

1/21.95

3/45

17.9

1 1/413.3

1 1/217.8

press. range 0 - 40 - 8

barbar

0.70.3

1.950.7

2.91.95

52.9

7.95

13.36.4

Pressure Rangesnom. diameterG 3/8 - 1

pressure range [bar]0 - 2 0 - 4 0 - 8

DN 40 - 80 0 - 8

Kvs-values [m3/h]nom. diameterpress. range 0 - 8

DNbar

4020

5032

6550

8082

NV 98 FZ/u



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MaterialsBodyCone


SeatValve SealFloat

CrNiMo-steelG 3/8 FPM, G 1/2 - 1 1/2 EPDMCrNiMo-steel NV 98 RZ/u

Dimensions [mm] NV 98 F + NV 98 FP


40 50 65 80ABCD

8560

9575

105 70

125 90

9575

11080

125 90

140 125

EFHK

145 43

165 53

330 280

330 305

LM

28055

30555

165 64

180 80

440 340

530 380

34080

38080

Weights [kg] NV 98 F + NV 98 FPnominal diameter DN

40 50 65 806.5 9.5 12.5 13.5

D

E

H

K

L

C

D

E

B

H

K

L

M

1000

1000

NV 98 FPZ/u

A

A

F

CB

F

Level Control Valve NV 98Float Valves for installation in vesselsup to 130 C

Dimensions [mm] NV 98 R

sizenominal diameter G..A

3/8 1/2 3/4 1 1 1/4 1 1/2ABCD

4060

4060

85 60

85 60

4060

4565

85 60

90 60

4772

4777

96 60

101 60

EFGH

11016

11016

3/8200

1/2200

IK

135 100

145 110

11020

11520

1/2200

3/4200

12323

12825

1200

1 1/4200

165 130

185 150

215 180

235 200

Weights [kg] NV 98 Rnominal diameter G ... A

3/8 1/2 3/4 1 1 1/4 1 1/20.9 0.9 1.4 1.5 2.7 3


C

D

EB

H

K

F

A

IG



Level Control Valves NV 36SF

DescriptionThis overfill preventer valve has been tested by Physikalisch-Tech-nische Bundesanstalt, the Technischer berwachungsverein(TV) and the Deutscher Ausschu fr brennbare Flssigkeitenand approved for systems subject to the above regulations. Eachoverfill preventer valve is given its own factory ID number.

An overfill preventer valve operates under direct float control andrequires no external energy. It is installed in the vertical filler pipein the storage tank. At the end of the filling process the float is lif-ted by the fluid and closes the filler pipe. The valve closes softlyand without pressure surges.

Features: Robust, proven and reliable design Easy installation Requires no energy input Can be installed at any site, independent of supply networks

According to the revised version of the German "Verordnung berbrennbare Flssigkeiten" (VbF) (Directive governing flammable li-quids) dated 5.6.1970 and the associated German "TechnischeRegeln ber brennbare Flssigkeiten" (TRbF) (Technical Rules forflammable liquids), systems or system components used in Ha-zard Areas Zone 0 (TRbF 510), must have design approval in ac-cordance with 11a of VbF.

STANDARD EQUIPMENT Lenticular float SR 5 or SR 6 (see overleaf)


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2.1.

061.

1 - i

ssue

12.

06.2

006


DN 32 - 200PN 16

Operating PressureKvs-value

0 - 4 and 0 - 16 bar11 - 230 m3/h

Overflow Protection for flammable liquidsup to 80 C


Test Symbol of thePhysical Technical Federal Institutenominal diameter DN test symbol

32405065

III B/S 1610 FIII B/S 1611 FIII B/S 1612 FIII B/S 1613 F

80100125150

III B/S 1614 FIII B/S 1615 FIII B/S 1616 FIII B/S 1617 F

200 III B/S 1618 F

Kvs-values m3/hnominal diameter

DNpressure range bar

0 - 4 0 - 1632405065

1111

1111

1111

1111

80100125150

2346

1123

84140

4684

200 230 140



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6

B

C

D

F

G

E

F

G

A

SR 5

SR 6

Level Control Valve NV 36SFOverflow Protection for flammable liquidsup to 80 C

ABC

A filling tube with flame protection and overflow protection

B outlet pipe with flame protectionC inspection tube

MaterialsBodyDouble Seat and Cone

cast steelCrNiMo-steel

SpindleValve SealFloat

brassFPMCrNiMo-steel

Dimensions [mm]

sizepress. range

barnominal diameter DN32 40 50 65 80 100 125 150 200

ABCD

0 - 4180180

0 - 16 60420

200180

230180

60420

60420

290235

310255

65455

75525

350275

400300

90630

95700

480360

600395

110784

140980

E 0 - 40 - 16

185210

175200

160185

125150

110130

80130

8515

6530

15110

Float Dimensions [mm]

sizepress. range


F

G

0 - 40 - 16

350550

0 - 40 - 16

280300

350550

350550

280300

280300

350550

450550

280300

275300

450570

500500

275330

300300

570570

570570

330330

330330

UFloat Typepressure range


0 - 40 - 16

SR 5SR 5 SR 6

Weights [kg] including floatnominal diameter DN

32 40 50 65 80 100 125 150 20018 20 26 40 50 62 87 137 215





DescriptionPneumatic shutoff valves are independent stop valves for water in-stallations fitted with accumulators. These valves prevent air esca-ping from accumulators into the pipe network once a pump has fai-led owing to lack of water, power cut, pipe blockage etc. In thisway dangerous water hammer in the pipe network and loss ofcompressed air is prevented.

The accumulator must be installed in a pipe spur. As long as theaccumulator is filled with water up to the level of the lower connec-ting spigot, the float of the pneumatic shutoff valve keeps the valveopen in both directions if there is a flow of water. As soon as airpasses from the accumulator into the pneumatic shutoff valve thelatter closes tightly preventing air entering the pipe network. Whenthe pump starts delivering the pneumatic shutoff valve automati-cally opens again and allows water to flow into the accumulator.When the water level is rising the pneumatic shutoff valve willopen only if the pressure inside and downstream of the valve isapproximately zero. The water flow velocity in the valve must notexceed 1.5 m/s (1 m/s for valve size DN 200).

NV 80 is a pneumatic shutoff valve of angled design, whereas NV82 is a straight valve. The valve body is of welded steel construc-tion; the float is precisely guided in two bushes; the valve cone isfitted with a soft seal.

OPTIONS Stainless steel construction all components stainless steel Rubber or plastic coating for corrosive media Various seal materials suitable for your medium


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6

Technical DataConnection DN 15 - 200

DN 250 - 400 on requestNominal PressureOperating PressureFlow Rate

PN 16bis 8 bar1 - 115 m3/h

Compressed Air Shutoff Valve for pipelines, straight and angled versionsup to 80 C

Q = max. [m3/h]nominal diameter DN

15 20, 25 32, 40 50 651 3 7 11 18

Q = max. [m3/h]nominal diameter DN

80 100 125 150 20027 42 68 100 115

NV 80

NV 82



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Dimensions [mm] NV 80, NV 82 PN 10


15 20 25 32 40 50 65 80A1A2BD

300320

300320

60285

65285

300320

360355

75285

85285

370360

390360

100285

120285

500460

540475

130340

165340



100 125 150 200 250 300 350 400A1A2CD

680580

720580

205395

245395

875700

12501100

285445

310445

on request

Weights [kg] NV 80, NV 82 nominal diameter DN

100 125 150 200 250 300 350 400PN 10PN 16

103106

108112

137148

153164

on request

Weights [kg] NV 80, NV 82 nominal diameter DN

15 20 25 32 40 50 65 80PN 10PN 16

2626

26.526.5

2727

29.529.5

3030

3131

5657

5859



15 20 25 32 40 50 65 80A1A2BD

300320

300320

60285

65285

300320

360355

75285

85285

370360

390360

100285

120285

500460

540475

130340

165340



100 125 150 200 250 300 350 400A1A2BD

680580

720580

205405

245405

875700

900800

285460

310460

on request

D

A1

MaterialsTemperatureBody

80 Csteel optional CrNiMo-steel

Body SealInternalsFloatValve Seal

Nova UniversalCr-steel optional CrNi-steel or CrNiMo-steelCrNi-steel optional CrNiMo-steelNBR

NV 82

A2

D

BNV 80

Level Control Valve NV 80, 82Compressed Air Shutoff Valve for pipelines, straight and angled versionsup to 80 C


Floats SR 3, 4, 7, 8S

heet

no.

SR

3/3

.1.0

61.1

- Is

sue

12.0

6.20

06

Floats made of 316LSR 3 and SR 4 for pressure-vessels, SR 7 and SR 8 for depressurised vessels

SR 3 with fork SR 4 with internal tube

SR 7 with fork SR 8 with internal tube

Buoyancy SR 3 and SR 4 [kg] in cold water600.06

700.08

800.14

900.22

1000.30

1100.42

1200.595

1300.69

1501.14

Dimensions SR 3 and SR 4 [mm]diameterthikness

mmmm

600.5

700.8

800.8

900.8

1000.8

1100.8

1200.8

1301

1501

pressure K 120 Csocketinternal tube filling screw

barG

341/8

mmG

--

521/8

421/8

--

--

321/8

301/8

--

--

261/8

241/8

121/4

121/4

311/8

241/8

121/4

121/4

Weight SR 3 and SR 4 [kg]600.67

701.23

801.53

901.88

1002.37

1102.94

1203.87

1305.35

1508.14

Displacement SR 3 and SR 4 [dm3]600.06

700.08

800.14

900.22

1000.30

1100.42

1200.595

1300.69

1501.14

Dimensions SR 3 and SR 4 [mm]diameterthikness

mmmm

1601

1801.5

2001.5

2201.5

2501.5

2801.5

3201.5

3801.5

4601.5

pressure K 120 Csocketinternal tube filling screw

barG

211/4

mmG

163/8

331/4

301/4

163/8

163/8

263/8

243/8

163/8

163/8

213/8

163/4

163/8

203/4

133/4

73/4

203/4

203/4

Buoyancy SR 3 and SR 4 [kg] in cold water1601.47

1801.79

2002.66

2203.70

2505.81

2808.55

32013.29

38023.38

46042.81

Weight SR 3 and SR 4 [kg]1600.67

1801.26

2001.53

2201.88

2502.37

2802.94

3203.87

3805.35

4608.14

Displacement SR 3 and SR 4 [dm3]1602.14

1803.05

2004.19

2205.58

2508.18

28011.19

32017.16

38028.73

46050.95

Dimensions SR 7 and SR 8 [mm]diameterheight

mmmm

200200

240240

280280

305305

340340

buoyancy *displacementweightinternal tube

kgdm3

4.25.5

kgmm

1.316

77.29.5

11.815

2.316

3.216

15.619.4

21.726.3

3.820

4.620

filling screw G 3/8 3/8 3/8 3/8 3/4

Dimensions SR 7 and SR 8 [mm]diameterheight

mmmm

380380

420420

460460

500500

600600

buoyancy *displacementweightinternal tube

kgdm3

31.237

kgmm

5.820

42.149

55.165

6.920

9.920

71.283

130147

11.824

1724

filling screw G 3/4 3/4 3/4 3/4 3/4



Special designs on request.The pressure has always been indicated as overpressure.Mankenberg reserves the right, to alter or improve the designs orspecifications of the products described herein without notice.

Pressure Reducing ValvesoverviewKnowHowcalculation of pressure regulatorsselectionDM 152DM 307, 308DM 401DM 462DM 502DM 505DM 506DM 510 - 518DM 512, 513, 517DM 603DM 604DM 613DM 652DM 662DM 664DM 701DM 762DM 765DM 810DM 814, 815DM 818DM EU115DM 3, 4

Overflow ValvesoverviewknowhowselectionUV 1.2UV 1.8UV 1.9UV 3.2UV 3.5UV 3.8UV 3.9UV 4.1UV 4.7, 4.8UV 5.1UV 6.7, 6.8UV 8.2UV 820UV 824, 824UV EU116UV 6.2K

Vacuum ValvesoverviewknowhowselectionVV 34, 35, 36VV 59

Burst Pipe Isolating Valves, Safety ValvesoverviewknowhowselectionRS 219RS 659SV 4, 40SV 6, 60SV 29SV 29V

Bleeding and Venting ValvesoverviewknowhowselectionEB 1.10, 1.11EB 1.12, 1.32EB 1.59EB 1.74EB 1.84EB 3.50EB 3.52

Float ValvesoverviewknowhowselectionNV 12NV 16, 26NV 16e, 55eNV 55, 56NV 66e, 67eNV 71NV 94NV 98NV 36SFNV 80, 82floats

Steam Trapsoverviewselection guidelinesselectionKA 2, 2XKA 3NiagaraAxomatKA RV2KA RX1, RX2KA RH1, RH2AS 2

Sightglasses, Flow IndicatorsoverviewknowhowselectionDA 1.10, 1.30, 1.40DA 2.00, 4.00DA 3.10 - 3.40, DA 4.10 - 4.40DA 4.11DA 6.00, 6.10, 6.12, 6.30DA 7.00, 7.10sensitivy

Strainers, FiltersoverviewknowhowselectionSF 1.00SF 2.00SF 3.00SF 1.22SF 6.00FI 1.01FI 6.01FI 6.06

Flow Switches, Float SwitchesoverviewSW 6.14SW 1.10, 1.20, 1.40NS 5, 6, 15, 16

Approvals & Certificates

mankenberg float valves

Documents

bar nv

stainless steelpn

spheroidal cast ironpn

valveall stainless steel

sf body cast steelpn

double seatbody grey

e large capacity

e single seat balancednv