type hfi - danfossfiles.danfoss.com/technicalinfo/dila/01/dkrci pd gb0 a3... · 2008-02-18 · high...

High pressure float valve, type HFI

REFRIGERATION AND AIR CONDITIONING Technical leaflet

Technical leaflet High pressure float valve, type HFI

� DKRCI.PD.GB0.A3.0� / 5�0H�143 © Danfoss A/S (AC-AKC / frz), 1�-�007

Contents Page

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

The principle of high pressure control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Insert for the high pressure float valve, type HFI 070 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Computation and selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Capacity tables - SI units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Capacity tables - US units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

High pressure control in refrigeration system with condenser/evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Material specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Dimensions and weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Volumes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1�

Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1�


© Danfoss A/S (AC-AKC / frz), 1�-�007 DKRCI.PD.GB0.A3.0� / 5�0H�143 3

Introduction

HFI is a high pressure float valve with internal liquid measuring device. The float valve is designed for direct flange mounting or welding on to plate heat exchanger type condensers, as illustrated in fig 1.

HFI is direct acting, therefore no differential pressure is required to activate the valve.

HFI is sturdy and reliable owing to its simple design. The float valve is equipped with a purge valve for purging non condensable gases e.g. air from the top of the valve housing. This facility is also useful if the valve has to be serviced.

Fig. 1

Features Designed for direct flange mounting on to plate heat exchanger type condensersCan be mounted directly on vesselsTemperature range: –50/+80°C (–58/+176°F)Equipped with purge valve for purging non condensable gassesMaximum operating pressure is �5 bar g (363 psi g)

Suitable for ammonia and other refrigerants with a density of 500 through 700 kg/m3 (31.�1 - 43.70 lb/ft3). For densities outside this range please contact your local Danfoss sales company.Housing i.e. shell and flange are made of special steel approved for low temperature applicationClassification: To get an updated list of certification on the products please contact your local Danfoss Sales Company.


4 DKRCI.PD.GB0.A3.0� / 5�0H�143 © Danfoss A/S (AC-AKC / frz), 1�-�007

Available connectionsFlange:Inlet: Flange DN 100 or DN 150 (DIN-�635/DIN �51�-F)Outlet: Welding connection DN 50 (EN 10��0)

Butt-weld, DIN: Inlet: DN 100 or DN 150 (EN 10��0)Outlet: Welding connection DN 50 (EN 10��0)

Butt-weld, ANSI: Inlet: DN 100 (4 in.) or DN 150 (6 in.) (ANSI B 36.10)Outlet: Welding connection DN 50 (� in.) (ANSI 36.10)

HousingHousing i.e. shell and flange is made of special steel approved for low temperature operation.

InstallationRefer to installation instruction for HFI.

Identification:

Design

Technical data Refrigerants HFI as standard can be used for R 717 (ammonia) and other refrigerants with a density of 500 through 700 kg/m3 (31.�1 - 43.70 lb/ft3). If the density of the refrigerant in question is outside this range, please contact your local Danfoss Sales Company. Flammable hydrocarbons are not recommended. For further information please contact your local Danfoss Sales Company.Temperature range –50/+80°C (–58/+176 °F)

Pressure The float valve is designed for: Maximum operating pressure: �5 bar g (363 psi g). Strength test without float ball: 50 bar g (7�5 psi g). Leakage test: �5 bar g (363 psi g). Valves for higher pressure are available on request.

Pressure Equipment Directive (PED)The HFI-valves are approved in accordance with the European standard specified in the Pressure Equipment Directive and are CE marked.For further details / restrictions - see Installation Instruction

HFI valves

Nominal bore DN 100 and 150 mm (4 in. and 6 in.)

Classified for Fluid group I

Catagory III

The principle of high pressure control

IntroductionIn installations with one application high pressure control is an effective and cost saving way of expanding liquid from the condenser to the low pressure side.

High pressure refrigerant entering the condenser will start to condense, consequently condensate will accumulate at the bottom of the condenser and in the float valve.

When capacity demands increase, the liquid level in the float valve will rise, which will cause the valve to open and the refrigerant to expand into the separator at the low pressure side.

When the valve is closed, there will still be a small by-pass over the seat, so any remaining liquid will equalize slowly to the low pressure side, for instance during an off cycle. Therefore the system will equalize automatically and the compressor can start up without excessive back pressure. The size of the bypass is predetermined and defined by geometry of the elements.

It follows from the above, that almost all the refrigerant will be accumulated on the low pressure side under normal conditions. Therefore under normal conditions no high pressure receiver is necessary when using the HFI for high pressure control.



Computation and selection In R 717 plants (ammonia)

On the following pages you will find tables with capacities of the float valve at various operating conditions.

Select a valve using the specific operating conditions. The chosen valve must have a capacity higher than the required capacity during nominal operation, as well as during plant start up.

In plants using other refrigerants than ammonia

The capacity of the float valve can be calculated by using the values and the equation to the right. However, the density of the refrigerant must be in the range: 500 to 700 kg/m3.

For densities outside this range please contact your local Danfoss Sales Company. Mass flow G =

∆p = differential pressure [bar]ρ = density of liquid [kg/m3]K = valve constant (from the above table)

Valve type Nominal capacity [kW]

(R 717, –10/+35°C)

Valve constant [K]

HFI 040 FD 400 16.79

HFI 050 FD 800 33.58

HFI 060 FD 1�00 50.36

HFI 070 FD �400 100

Fig. 3 Fig. 4

Insert for the high pressure float valve

A

Detail AFully closed

B

Detail BFully open



Computation and selectioncapacity tables - SI units

Condensingtemp. (°C)

Evaporating temperature (°C)

–40 –35 –30 –�5 –�0 –15 –10 –5 0 5 10 15 �0

50454035

9559�0880845

9559�0880845

9559�0880840

955915875835

9509108708�5

945905860815

935895850800

9�5880830780

910860810755

8908357807�0

865805745680

8307707006�5

7907�5645560

30�5�015

8057657�0675

800760715670

800755705660

790745695645

780730680630

765715660605

750695635570

7�5665600530

695630555480

655580500405

6055�04�0�95

540440310

4553�0

1050

–5–10

630585540490440

6�55755�54754�0

610560505455395

5955404854�5360

570515450385305

5454804053�5�30

505430345�40

455365�55

385�70

�85

HFI 040 - R 717, evaporating capacity [kW]





–40 –35 –30 –�5 –�0 –15 –10 –5 0 5 10 15 �0

50454035

1430138013�51�65

1435138013�51�65

1435138013�01�60

1430137513151�50

14�5137013051�40

14�013601�901��0

140513401�701200

138513�01�451170

13651�901�151130

13351�5511701080

1�951�1011�010�0

1�4511551055940

11901085970840

30�5�015

1�05114510801015

1�05114010701005

119511301060990

118511151045970

1170110010�0940

11501075990905

11�01040950860

1085995900795

1040940835715

980870750605

905780635445

810660465

685485

1050

–5–10

945875805735660

935860785710635

915840760680595

8908107�5635540

860770675575460

8157�0610490340

7556455�0360

680550380

580405

4�5



–40 –35 –30 –�5 –�0 –15 –10 –5 0 5 10 15 �0

50454035

4754604404�0

4804604404�0

4804604404�0

475460440415

475455435415

475455430405

4704454�5400

460440415390

455430405375

4454�0390360

430405375340

415385350315

3953603�5�80

30�5�015

400380360340

400380355335

400375355330

3953703503�5

390365340315

385360330300

375345315�85

360330300�65

345315�80�40

3�5�90�50�00

300�60�10150

�70��0155

�30160

1050

–5–10

315�90�70�45��0

310�85�60�35�10

305�80�55��5�00

�95�70�40�10180

�85�55��5190155

�70�40�05165115

�50�151751�0

��51851�5

195135

140

HFI 070 - R717, evaporating capacity [kW]Condensing

temp. (°C)Evaporating temperature (°C)

–40 –35 –30 –�5 –�0 –15 –10 –5 0 5 10 15 �0

50454035 �445

�680�5452400

�775�640�490�335

�7�5�580�4�5��60

�665�510�340�160

�590�4�0��35�035

�495�310�1051880

�375�17019401680

30�5�015

�0901940

�340�195�0401885

�300�14519801810

��45�08019001715

�170199518001595

�080188516701435

1960174515001�10

181515651�65890

16�513�0930

1370965

1050

–5–10

147013�5

17�5157514�51�65

1835168015�013601190

178516�014501�701080

17151540135011509�0

163014351��0980685

15151�9510407�5

13651100765

1160810

850



Computation and selectioncapacity tables - US units

HFI 040 - R 717, evaporating capacity [TR]Condensing

temp. (°F)Evaporating temperature (°F)

–40 –30 –�0 –10 0 10 �0 30 40 50 60 70 80

1�011010090

1341�91�3117

1351�91�3117

1351�91��116

1341�81��115

1341�71�0113

13�1�6118111

1311�3116107

1�81�111�103

1�511710898

1�111�10�91

1161069481

109988469

101877150

80706050

1101039790

1101039688

10910�9486

1071009�83

105978980

10�948474

99897967

94837157

8775604�

786344

6647

49

4030�010

8�756759

81736556

78706151

75655544

70594733

635135

5438

40

HFI 050 - R 717, evaporating capacity [TR]Condensing


–40 –30 –�0 –10 0 10 �0 30 40 50 60 70 80

1�011010090

�68�58�46�34

�69�58�46�33

�69�57�45�3�

�69�56�43��9

�67�54�41��6

�65�51�37��1

�61�47�3��15

�56�41��4�07

�50�33�15196

�4��4�04181

�31�11189163

�18195169138

�01175143101

80706050

��1�07193179

��0�06191176

�18�0318817�

�15�00184167

�11194177159

�05187169149

197178157134

18716614�114

1741491�184

1561�789

13�93

97

4030�010

165150135119

1611451�911�

1561391�110�

14913011088

1401189565

1�710�70

10875

80

HFI 060 - R 717, evaporating capacity [TR]

Condensingtemp. (°F)

Evaporating temperature (°F)

–40 –30 –�0 –10 0 10 �0 30 40 50 60 70 80

1�011010090

403386369350

404387368350

404386367348

403384365344

401381361339

39737735533�

39�3703473��

38536�337310

3753503�3�93

363335305�7�

347317�83�44

3�7�93�53�07

30��6��14151

80706050

331310�90�69

3�9309�87�65

3�7305�8��59

3��99�75�50

316�9��66�39

307�81�53��3

�96�67�36�0�

�81�49�1317�

�61��41811�6

�34190133

199140

146

4030�010

�47��5�0�178

�4��18194168

�34�0918�153

��419616513�

�0917814�98

19015�106

16�113

1�0

HFI 070 - R717, evaporating capacity [TR]Condensing


–40 –30 –�0 –10 0 10 �0 30 40 50 60 70 80

1�011010090 678

710664

784741695645

7697�36736�0

750700646587

7�5671611544

694633566489

654586507413

6035�44�830�

80706050 517

599551500

63�58353�477

61556�506446

59�53447�403

5614974�6343

5�144736��53

469380�67

397�79

�9�

4030�010

404357

483436387336

469418364307

448391331�63

419355�84195

380305�11

3�5��6

�40



High pressure control in refrigeration system with condenser/evaporator

Fig. 5 shows a water chiller with plate heat exchanger as both condenser and evaporator. HFI is flanged directly on to the condenser.

Compressor

Vapor

Liquid

High pressureFloat Valve - HFI

High pressurecondenser

Water chiller (evaporator)

Fig. 5, Example



Fig. 6

Material specification

No Part Material DIN/EN ISO ASTM1 Housing:

a. Shellb. Flange (shell)c. Flange (inlet)d. Branch (discharge)

Steel SteelSteelSteel

TTSt 35 N, 17173P�75 NL1, EN 10 0�8-3P�75 NL1, EN 10 0�8-3TTSt 35 N/V, 17173

TW6, �604/3

TW6, �604/3

Grade 1, A333, A334

Grade 1, A333, A3343 End cover with cylinder Steel P�75 NL1, EN 10 0�8-34 Set screw Stainless steel A�-70 A�-705 Tube Steel6 Gasket Aluminium7 Purge valve, SNV-ST 1)8 Gasket Non asbestos9 Float Ball Steel

1) for further information please see the datasheet for SNV-ST valves.



Connections

*Inlet flange and DIN outlet

Butt welding ANSI B 36.10ANSI - Inlet

ANSI - Outlet Butt welding ANSI B 36.10

Butt welding EN10220DIN - Outlet

Butt welding EN 10220DIN - Inlet

Inlet flange 40 bar / DIN 2635 / DIN 2512-F*

Size mm

Size in.

OutletFor use with valve typeOD

mm T

mmOD in.

T in.

100 4 60.3 �.9 �.37 0.11

HFI 040HFI 050HFI 060HFI 070

150 6 60.3 �.9 �.37 0.11HFI 050HFI 060HFI 070

Size mm

Size in.

InletFor use with valve typeOD

mm T

mmOD in.

T in.

100 4 114.3 3.6 4.50 0.14


150 6 168.3 4.5 6.63 0.18HFI 050HFI 060HFI 070

Size mm

Size in.

OutletFor use with valve typeOD

mm T

mmOD in.

T in.

100 4 60.3 �.9 �.37 0.11


150 6 60.3 �.9 �.37 0.11HFI 050HFI 060HFI 070

Size mm

Size in.

InletFor use with valve typeOD

mm T

mmOD in.

T in.

100 4 114.3 3.6 4.50 0.14


150 6 168.3 4.5 6.63 0.18HFI 050HFI 060HFI 070

D b k d4� d43 F d� Z

Size 100 (4 in.)mm �35 �4 190 1�9 149 4.5 ��

8 pcs.in. 9.3 0.94 7.48 5.08 5.87 0.18 0.97

Size 150 (6 in.)mm 300 �8 �50 183 �03 4.5 �6

8 pcs.in. 11.8 1.10 9.84 7.�0 7.99 0.18 1.0�



Dimensions and weights

Fig. 7

Fig. 8

High pressure float valve without flange (Fig. 7)Valve size A1 A� A3 B C ØD Fmin. Weight

HFI 100mm 19� 113 �5 �76 435 �19 �00 37 kg

in. 7.56 4.45 0.98 10.87 17.13 8.6� 7.87 81.5 lb

HFI 150mm 167 113 �76 435 �19 �00 37 kg

in. 6.57 4.45 10.87 17.13 8.6� 7.87 81.5 lb

Specified weights are approximate values only.

High pressure float valve with flange (Fig. 8)Valve size A1 A� A3 B C ØD Fmin. Weight

HFI 100mm 19� 180 �5 309 50� �19 �00 41 kg

in. 7.56 7.09 0.98 1�.17 19.76 8.6� 7.87 90.4 lb

HFI 150mm 167 189 317 511 �19 �00 41 kg

in. 6.57 7.44 1�.48 �0.1� 8.6� 7.87 90.4 lb

Specified weights are approximate values only.


1� DKRCI.PD.GB0.A3.0� / 5�0H�143 © Danfoss A/S (AC-AKC / frz), 1�-�007

Volumes

Internal volume (gross): 8.2 × 10–3 m3 (2.17 USgal)Internal volume with float ball: 6.4 × 10–3 m3 (1.69 USgal)Liquid volume at max. level: 4.6 × 10–3 m3 (1.22 USgal)Liquid volume at min. level: 1.6 × 10–3 m3 (0.42 USgal)

Fig. 9

Ordering The table below is used to identify the valve required. Example: HFI 040 D 100 = 148G309�

FD = inlet flange DIND = Butt welding DINA = Butt welding ANSI

Type Inlet connection size Nozzle size Code numbers

HFI 040 FD 100

100 (4 in.) DIN Flange

40 148G3102

HFI 050 FD 100 50 148G3103

HFI 060 FD 100 60 148G3104

HFI 070 FD 100 70 148G3422

HFI 050 FD 150

150 (6 in.) DIN Flange

50 148G3105

HFI 060 FD 150 60 148G3106

HFI 070 FD 150 70 148G3423

HFI 040 D 100

100 (4 in.) DIN BW

40 148G3092

HFI 050 D 100 50 148G3093

HFI 060 D 100 60 148G3094

HFI 070 D 100 70 148G3418

HFI 050 D 150

150 (6 in.) DIN BW

50 148G3095

HFI 060 D 150 60 148G3096

HFI 070 D 150 70 148G3419

HFI 040 A 100

100 (4 in.) ANSI BW

40 148G3097

HFI 050 A 100 50 148G3098

HFI 060 A 100 60 148G3099

HFI 070 A 100 70 148G3420

HFI 050 A 150

150 (6 in.) ANSI BW

50 148G3100

HFI 060 A 150 60 148G3101

HFI 070 A 150 70 148G3421

Insert for HFI 070 (complete insert with float ball - without float housing) 148G3584

Insert for HFI 60 ( complete insert with float ball - without float housing) 148G3663



Special HFI valves with extra connections for drainage and pressure equalization are available on request.Please contact your local Danfoss sales office.

Specials

type hfi - danfossfiles.danfoss.com/technicalinfo/dila/01/dkrci pd gb0 a3... · 2008-02-18 · high...

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