Danfoss HFI 040 FD, HFI 050 FD, HFI 060 FD, HFI 070 FD, HFI Data sheet

Data Sheet

Float valve Type HFI

Robust and reliable solution for high pressure control

HFI is a high pressure oat valve with internal liquid measuring device. The oat valve is designed for direct ange mounting or welding on to plate heat exchanger type condensers, as illustrated in Figure 1: Plate heat exchanger

HFI is direct acting, therefore no dierential pressure is required to activate the valve.

HFI is robust and reliable due to its simple design. The oat valve is equipped with a purge valve for purging non condensable gases e.g. air from the top of the valve housing. This feature is also useful if the valve has to be serviced.

The HFI is available with two external connections on the housing for drainage and pressure equalizations.

AI220786430153en-001101

Float valve, type HFI

Features

• Designed for direct ange mounting on to plate heat exchanger type condensers

• Can be mounted directly on vessels

• Temperature range: -50 °C /+80 °C (-58 °F/+176 °F)

• Equipped with purge valve for purging non condensable gasses

• Available with external connections for drainage and pressure equalizations

• Maximum operating pressure is 25 bar (363 psig)

• Suitable for R717 (ammonia), HCFC and HFC with a density of 500 through 700 kg/m3 (31.21 - 43.70 lb/ft3). For densities outside this range please contact your local Danfoss sales company.

• Housing i.e. shell and ange are made of special steel approved for low temperature application

• Classication: DNV, CRN, BV, EAC etc. To get an updated list of certication on the products please contact your local Danfoss Sales Company.

Figure 1: Plate heat exchanger

Float valve, type HFI

Media

Refrigerants

Refrigerants Suitable for R717 (ammonia), HCFC and HFC with a density of 500 through 700 kg/m3 (31.21 - 43.70 lb/ft3). For densities 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.

New refrigerants

Danfoss products are continually evaluated for use with new refrigerants depending on market requirements.

When a refrigerant is approved for use by Danfoss, it is added to the relevant portfolio, and the R number of the refrigerant (e.g. R513A) will be added to the technical data of the code number. Therefore, products for specic refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.

Description

Values

Temperature range

-50 °C / +80 °C (–58 °F /+176 °F)

The oat valve is designed for: Maximum operating pressure

Housing PED 28 bar (407 psig) Ball (oat) 25 bar (363 psig)

Float valve, type HFI

Product specication

Design

Housing

Housing i.e. shell and ange is made of special steel approved for low temperature operation.

Installation

Refer to installation instruction for HFI.

Figure 2: Identication:

Pressure and temperature data

Table 1: Pressure and temperature

If test pressure exceeds 25 bar (363 psi g) the ball should be removed during test.

Valves for higher pressure are available on request.

The principle of high pressure control

Introduction

In installations with one application high pressure control is an eective 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 oat valve.

When capacity demands increase, the liquid level in the oat 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 o 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 dened 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.

ΔpρK

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

1200

50.36

HFI 070 FD

2400

100

dierential pressure [bar]

density of liquid [kg/m3]

valve constant (from the above table)

Condens‐

ing temp.

(°C)

Evaporating temperature (°C)

–40

–35

–30

–25

–20

–15

–10–505101520

50 45 40 35

475 460 440 420

480 460 440 420

475 460 440 415

475 455 435 415

475 455 430 405

470 445 425 400

460 440 415 390

455 430 405 375

445 420 390 360

430 405 375 340

415 385 350 315

395 360 325 280

30 25 20 15

400 380 360 340

400 380 355 335

400 375 355 330

395 370 350 325

390 365 340 315

385 360 330 300

375 345 315 285

360 330 300 265

345 315 280 240

325 290 250 200

300 260 210 150

270 220 155

230 160

10

5 0

–5

–10

315 290 270 245 220

310 285 260 235 210

305 280 255 225 200

295 270 240 210 180

285 255 225 190 155

270 240 205 165 115

250 215 175 120

225 185 125

195 135

140

Float valve, type HFI

Insert for the high pressure oat valve

Figure 3: Detail A Fully closed Figure 4: Detail B Fully open

Computation and selection

In R 717 plants (ammonia) On the following pages you will nd tables with capacities of the oat valve at various operating conditions.

Select a valve using the specic 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 oat 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.

Table 2: Valve capacity values

Mass ow

G = K Δp × ρ

[kg / h]

Computation and selection capacity tables - SI units

Table 3: HFI 040 - R 717, evaporating capacity [kW]

Condens‐

ing temp.

(°C)

Evaporating temperature (°C)

–40

–35

–30

–25

–20

–15

–10–505101520

50 45 40 35

955 920 880 845

955 920 880 840

955 915 875 835

950 910 870 825

945 905 860 815

935 895 850

800

925 880 830 780

910 860 810 755

890 835 780 720

865 805 745 680

830 770 700 625

790 725 645 560

30 25 20 15

805 765 720 675

800 760 715 670

800 755 705 660

790 745 695 645

780 730 680 630

765 715 660 605

750 695 635 570

725 665 600 530

695 630 555 480

655 580 500 405

605 520 420 295

540 440 310

455 320

10

5 0

–5

–10

630 585 540 490 440

625 575 525 475 420

610 560 505 455 395

595 540 485 425 360

570 515 450 385 305

545 480 405 325 230

505 430 345 240

455 365 255

385 270

285

Condens‐

ing temp.

(°C)

Evaporating temperature (°C)

–40

–35

–30

–25

–20

–15

–10–505101520

50 45 40 35

1430 1380 1325 1265

1435 1380 1325 1265

1435 1380 1320 1260

1430 1375 1315 1250

1425 1370 1305 1240

1420 1360 1290 1220

1405 1340 1270 1200

1385 1320 1245 1170

1365 1290 1215 1130

1335 1255 1170 1080

1295 1210 1120 1020

1245 1155 1055

940

1190 1085

970 840

30 25 20 15

1205 1145 1080 1015

1205 1140 1070 1005

1195 1130 1060

990

1185 1115 1045

970

1170 1100 1020

940

1150 1075

990 905

1120 1040

950 860

1085

995 900 795

1040

940 835 715

980 870 750 605

905 780 635 445

810 660 465

685 485

10

5 0

–5

–10

945 875 805 735 660

935 860 785 710 635

915 840 760 680 595

890 810 725 635 540

860 770 675 575 460

815 720 610 490 340

755 645 520 360

680 550 380

580 405

425

Condens‐

ing temp.

(°C)

Evaporating temperature (°C)

–40

–35

–30

–25

–20

–15

–10–505101520

50 45 40 35

2445

2680 2545 2400

2775 2640 2490 2335

2725 2580 2425 2260

2665 2510 2340 2160

2590 2420 2235 2035

2495 2310 2105 1880

2375 2170 1940 1680

30 25 20 15

2090 1940

2340 2195 2040 1885

2300 2145 1980 1810

2245 2080 1900 1715

2170 1995 1800 1595

2080 1885 1670 1435

1960 1745 1500 1210

1815 1565 1265

890

1625 1320

930

1370

965

10

5 0

–5

–10

1470 1325

1725 1575 1425 1265

1835 1680 1520 1360 1190

1785 1620 1450 1270 1080

1715 1540 1350 1150

920

1630 1435 1220

980 685

1515 1295 1040

725

1365 1100

765

1160

810

850

Condens‐

ing temp.

(°F)

Evaporating temperature (°F)

–40

–30

–20

–10010203040506070

80

120 110 100

90

134 129 123 117

135 129 123 117

135 129 122 116

134 128 122 115

134 127 120 113

132 126 118 111

131 123 116 107

128 121 112 103

125 117 108

98

121 112 102

91

116 106

94 81

109

98 84 69

101

87 71 50

80 70 60 50

110 103

97 90

110 103

96 88

109 102

94 86

107 100

92 83

105

97 89 80

102

94 84 74

99 89 79 67

94 83 71 57

87 75 60 42

78 63 44

66 47

49

40 30 20 10

82 75 67 59

81 73 65 56

78 70 61 51

75 65 55 44

70 59 47 33

63 51 35

54 38

40

Float valve, type HFI

Table 4: HFI 050 - R 717, evaporating capacity [kW]

Table 5: HFI 060 - R 717, evaporating capacity [kW]

Table 6: HFI 070 - R717, evaporating capacity [kW]

Table 7: HFI 040 - R 717, evaporating capacity [TR]

Danfoss HFI 040 FD, HFI 050 FD, HFI 060 FD, HFI 070 FD, HFI Data sheet

Specifications and Main Features

Frequently Asked Questions

User Manual