High pressure float valve, type HFI REFRIGERAION AND AIR CONDIIONING echnical leaflet
Contents Page Introduction........................................................................................3 Features............................................................................................3 Design.............................................................................................4 echnical data......................................................................................4 he principle of high pressure control...............................................................4 Insert for the high pressure float valve, type.................................................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...................................................................................... Dimensions and weights.......................................................................... 11 Volumes.......................................................................................... 12 Ordering......................................................................................... 12 DKRCI.PD.GB0.A3.02 / 5H2143 Danfoss A/S (AC-AKC / frz), 12-07
Introduction HFI is a high pressure float valve with internal liquid measuring device. he float valve is designed for direct flange mounting or welding on to plate heat exchanger type condensers, as illustrated in fig 1. HFI is sturdy and reliable owing to its simple design. he float valve is equipped with a purge valve for purging non condensable gases e.g. air from the top of the valve housing. his facility is also useful if the valve has to be serviced. HFI is direct acting, therefore no differential pressure is required to activate the valve. Fig. 1 Features Designed for direct flange mounting on to plate heat exchanger type condensers Can be mounted directly on vessels emperature range: /+80 C ( 58/+176 F) Equipped with purge valve for purging non condensable gasses Maximum operating pressure is 25 bar g (363 psi g) Suitable for aonia and other refrigerants with a density of 0 through 0 kg/m 3 (31.21-43. lb/ft 3 ). 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 application Classification: o get an updated list of certification on the products please contact your local Danfoss Sales Company. Danfoss A/S (AC-AKC / frz), 12-07 DKRCI.PD.GB0.A3.02 / 5H2143 3
Design Available connections Flange: Inlet: Flange DN 0 or DN 1 (DIN-2635/DIN 2512-F) Outlet: Welding connection DN (EN 2) Butt-weld, DIN: Inlet: DN 0 or DN 1 (EN 2) Outlet: Welding connection DN (EN 2) Butt-weld, ANSI: Inlet: DN 0 (4 ) or DN 1 (6 ) (ANSI B 36.) Outlet: Welding connection DN (2 ) (ANSI 36.) Housing Housing i.e. shell and flange is made of special steel approved for low temperature operation. Installation Refer to installation instruction for HFI. Identification: Pressure Equipment Directive (PED) he 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 Nominal bore Classified for Catagory HFI valves DN 0 and 1 (4 and 6 ) Fluid group I III echnical data Refrigerants HFI as standard can be used for R 717 (aonia) and other refrigerants with a density of 0 through 0 kg/m 3 (31.21-43. lb/ft 3 ). If the density of the refrigerant in question is outside this range, please contact your local Danfoss Sales Company. Flaable hydrocarbons are not recoended. For further information please contact your local Danfoss Sales Company. emperature range /+80 C ( 58/+176 F) Pressure he float valve is designed for: Maximum operating pressure: 25 bar g (363 psi g). Strength test without float ball: bar g (725 psi g). Leakage test: 25 bar g (363 psi g). Valves for higher pressure are available on request. he principle of high pressure control Introduction In 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. herefore the system will equalize automatically and the compressor can start up without excessive back pressure. he 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. herefore under normal conditions no high pressure receiver is necessary when using the HFI for high pressure control. 4 DKRCI.PD.GB0.A3.02 / 5H2143 Danfoss A/S (AC-AKC / frz), 12-07
Insert for the high pressure float valve Detail A Fully closed Detail B Fully open A Fig. 3 B Fig. 4 Computation and selection In R 717 plants (aonia) 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. he 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 aonia he 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: 0 to 0 kg/m 3. Valve type Nominal capacity [kw] (R 717, /+35 C) Valve constant [K] HFI 0 FD 0 16.79 HFI 0 FD 800 33.58 FD 10.36 For densities outside this range please contact your local Danfoss Sales Company. FD 0 Mass flow G = p = differential pressure [bar] ρ = density of liquid [kg/m 3 ] K = valve constant (from the above table) Danfoss A/S (AC-AKC / frz), 12-07 DKRCI.PD.GB0.A3.02 / 5H2143 5
Computation and selection capacity tables - SI units HFI 0 - R 717, evaporating capacity [kw] Evaporating temperature ( C) 35 25 15 5 0 5 15 temp. ( C) 45 35 25 15 5 0 5 475 460 4 4 0 380 3 315 290 2 245 2 480 460 4 4 0 380 355 335 3 285 260 235 2 480 460 4 4 0 375 355 3 5 280 255 225 0 475 460 4 415 395 3 3 325 295 2 2 2 180 475 455 435 415 390 365 3 315 285 255 225 190 155 475 455 4 5 385 3 0 2 2 5 165 115 4 445 425 0 375 345 315 285 2 215 175 1 460 4 415 390 3 0 265 225 185 125 455 4 5 375 345 315 280 2 195 135 445 4 390 325 290 2 0 1 4 5 375 3 0 260 2 1 415 385 3 315 2 2 155 395 325 280 2 160 HFI 0 - R 717, evaporating capacity [kw] temp. ( C) 45 35 25 15 5 0 5 Evaporating temperature ( C) 35 25 15 5 0 5 15 955 9 880 845 805 765 7 675 6 585 5 490 4 955 9 880 845 800 760 715 6 625 575 525 475 4 955 9 880 8 800 755 5 660 6 560 5 455 395 955 915 875 835 790 745 695 645 595 5 485 425 9 9 8 825 780 7 680 6 5 515 4 385 5 945 905 860 815 765 715 660 605 545 480 5 325 2 935 895 8 800 7 695 635 5 5 4 345 2 925 880 8 780 725 665 600 5 455 365 255 9 860 8 755 695 6 555 480 385 2 890 835 780 7 655 580 0 5 285 865 805 745 680 605 5 4 295 8 7 0 625 5 4 3 790 725 645 560 455 3 - R 717, evaporating capacity [kw] Evaporating temperature ( C) 35 25 15 5 0 5 15 temp. ( C) 45 35 25 15 5 0 5 14 1380 1325 1265 15 1145 80 15 945 875 805 735 660 1435 1380 1325 1265 15 11 05 935 860 785 7 635 1435 1380 13 1260 1195 11 60 990 915 8 760 680 595 14 1375 1315 12 1185 1115 45 9 890 8 725 635 5 1425 13 15 12 11 10 9 860 7 675 575 460 14 1 1290 12 11 75 990 905 815 7 6 490 3 15 13 12 10 11 9 860 755 645 5 1385 13 1245 11 85 995 900 795 680 5 380 1365 1290 1215 11 9 835 715 580 5 1335 1255 11 80 980 8 7 605 425 1295 12 11 905 780 635 445 1245 1155 55 9 8 660 465 1190 85 9 8 685 485 - R717, evaporating capacity [kw] Evaporating temperature ( C) temp. ( C) 35 25 15 5 0 5 15 45 35 2445 25 15 5 0 5 14 1325 1725 1575 1425 1265 1835 1680 15 1 1190 90 19 1785 16 14 12 80 23 2195 1885 1715 15 13 11 9 2145 1980 18 16 1435 12 980 685 2680 2545 2245 80 1900 1715 1515 1295 725 2775 26 2490 2335 21 1995 1800 1595 1365 10 765 2725 2580 2425 2260 80 1885 16 1435 1160 8 2665 25 23 2160 1960 1745 12 8 2590 24 2235 35 1815 1565 1265 890 2495 23 25 1880 1625 13 9 2375 21 19 1680 13 965 6 DKRCI.PD.GB0.A3.02 / 5H2143 Danfoss A/S (AC-AKC / frz), 12-07
Computation and selection capacity tables - US units HFI 0 - R 717, evaporating capacity [R] temp. ( F) 1 1 0 90 80 60 Evaporating temperature ( F) 0 60 80 134 129 123 117 1 3 97 90 82 75 67 59 135 129 123 117 1 3 96 88 81 73 65 56 135 129 122 116 9 2 94 86 78 61 51 134 128 122 115 7 0 92 83 75 65 55 44 134 127 1 113 5 97 89 80 59 47 33 132 126 118 111 2 94 84 74 63 51 35 131 123 116 7 99 89 79 67 54 38 128 121 112 3 94 83 71 57 125 117 8 98 87 75 60 42 121 112 2 91 78 63 44 116 6 94 81 66 47 9 98 84 69 49 1 87 71 HFI 0 - R 717, evaporating capacity [R] Evaporating temperature ( F) temp. ( F) 0 60 80 1 1 0 90 80 60 268 258 246 234 221 7 193 179 165 1 135 119 269 258 246 233 2 6 191 176 161 145 129 112 269 257 245 232 218 3 188 172 156 139 121 2 269 256 243 229 215 0 184 167 149 1 1 88 267 254 241 226 211 194 177 159 1 118 95 65 265 251 237 221 5 187 169 149 127 2 261 247 232 215 197 178 157 134 8 75 256 241 224 7 187 166 142 114 80 2 233 215 196 174 149 121 84 242 224 4 181 156 127 89 231 211 189 163 132 93 218 195 169 138 97 1 175 143 1 - R 717, evaporating capacity [R] Evaporating temperature ( F) 0 60 80 temp. ( F) 1 1 0 90 80 60 3 386 369 3 331 3 290 269 247 225 2 178 4 387 368 3 329 9 287 265 242 218 194 168 4 386 367 348 327 5 282 259 234 9 182 153 3 384 365 344 322 299 275 2 224 196 165 132 1 381 361 339 316 292 266 239 9 178 142 98 397 377 355 332 7 281 253 223 190 152 6 392 3 347 322 296 267 236 2 162 113 385 362 337 3 281 249 213 172 1 375 3 323 293 261 224 181 126 363 335 5 272 234 190 133 347 317 283 244 199 1 327 293 253 7 146 2 262 214 151 - R717, evaporating capacity [R] Evaporating temperature ( F) temp. ( F) 0 60 80 1 1 0 90 678 80 60 517 4 357 483 436 387 336 469 418 364 7 599 551 0 448 391 331 263 632 583 532 477 419 355 284 195 7 664 615 562 6 446 380 5 211 784 741 695 645 592 534 472 3 325 226 769 723 673 6 561 497 426 343 2 7 0 646 587 521 447 362 253 725 671 611 544 469 380 267 694 633 566 489 397 279 654 586 7 413 292 603 524 428 2 Danfoss A/S (AC-AKC / frz), 12-07 DKRCI.PD.GB0.A3.02 / 5H2143 7
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 pressure Float Valve - HFI High pressure condenser Fig. 5, Example Water chiller (evaporator) 8 DKRCI.PD.GB0.A3.02 / 5H2143 Danfoss A/S (AC-AKC / frz), 12-07
Material specification Fig. 6 No Part Material DIN/EN ISO ASM 1 Housing: a. Shell b. Flange (shell) c. Flange (inlet) d. Branch (discharge) Steel Steel Steel Steel St 35 N, 17173 P275 NL1, EN 028-3 P275 NL1, EN 028-3 St 35 N/V, 17173 W6, 2604/3 W6, 2604/3 3 End cover with cylinder Steel P275 NL1, EN 028-3 4 Set screw Stainless steel A2- A2-5 ube Steel 6 Gasket Aluminium 7 Purge valve, SNV-S 1 ) 8 Gasket Non asbestos 9 Float Ball Steel 1 ) for further information please see the datasheet for SNV-S valves. Grade 1, A333, A334 Grade 1, A333, A334 Danfoss A/S (AC-AKC / frz), 12-07 DKRCI.PD.GB0.A3.02 / 5H2143 9
Connections DIN - Outlet Butt welding EN2 Outlet For use with valve type 0 4 60.3 2.9 2.37 0.11 1 6 60.3 2.9 2.37 0.11 HFI 0 HFI 0 HFI 0 ANSI - Outlet Butt welding ANSI B 36. Outlet For use with valve type 0 4 60.3 2.9 2.37 0.11 1 6 60.3 2.9 2.37 0.11 HFI 0 HFI 0 HFI 0 DIN - Inlet Butt welding EN 2 Inlet For use with valve type 0 4 114.3 3.6 4. 0.14 1 6 168.3 4.5 6.63 0.18 HFI 0 HFI 0 HFI 0 ANSI - Inlet Butt welding ANSI B 36. Inlet For use with valve type 0 4 114.3 3.6 4. 0.14 1 6 168.3 4.5 6.63 0.18 HFI 0 HFI 0 HFI 0 Inlet flange bar / DIN 2635 / DIN 2512-F* D b k d 42 d 43 F d 2 Z 0 (4 ) 235 24 190 129 149 4.5 22 9.3 0.94 7.48 5.08 5.87 0.18 0.97 1 (6 ) 0 28 2 183 3 4.5 26 11.8 1. 9.84 7. 7.99 0.18 1.02 *Inlet flange and DIN outlet 8 pcs. 8 pcs. DKRCI.PD.GB0.A3.02 / 5H2143 Danfoss A/S (AC-AKC / frz), 12-07
Dimensions and weights Fig. 7 High pressure float valve without flange (Fig. 7) Valve size A 1 A 2 A 3 B C ØD F m Weight HFI 0 192 113 25 276 435 219 0 37 kg 7.56 4.45 0.98.87 17.13 8.62 7.87 81.5 lb HFI 1 167 113 276 435 219 0 37 kg 6.57 4.45.87 17.13 8.62 7.87 81.5 lb Specified weights are approximate values only. Fig. 8 High pressure float valve with flange (Fig. 8) Valve size A 1 A 2 A 3 B C ØD F m Weight HFI 0 192 180 25 9 2 219 0 41 kg 7.56 7.09 0.98 12.17 19.76 8.62 7.87 90.4 lb HFI 1 167 189 317 511 219 0 41 kg 6.57 7.44 12.48.12 8.62 7.87 90.4 lb Specified weights are approximate values only. Danfoss A/S (AC-AKC / frz), 12-07 DKRCI.PD.GB0.A3.02 / 5H2143 11
Volumes Fig. 9 Internal volume (gross): 8.2 3 m 3 (2.17 USgal) Internal volume with float ball: 6.4 3 m 3 (1.69 USgal) Liquid volume at max. level: 4.6 3 m 3 (1.22 USgal) Liquid volume at m level: 1.6 3 m 3 (0.42 USgal) Ordering FD = inlet flange DIN D = Butt welding DIN A = Butt welding ANSI he table below is used to identify the valve required. Example: HFI 0 D 0 = 148G92 ype Inlet connection size Nozzle size Code numbers HFI 0 FD 0 148G32 HFI 0 FD 0 148G33 0 (4 ) DIN Flange FD 0 60 148G34 FD 0 148G3422 HFI 0 FD 1 148G35 FD 1 1 (6 ) DIN Flange 60 148G36 FD 1 148G3423 HFI 0 D 0 148G92 HFI 0 D 0 148G93 0 (4 ) DIN BW D 0 60 148G94 D 0 148G3418 HFI 0 D 1 148G95 D 1 1 (6 ) DIN BW 60 148G96 D 1 148G3419 HFI 0 A 0 148G97 HFI 0 A 0 148G98 0 (4 ) ANSI BW A 0 60 148G99 A 0 148G34 HFI 0 A 1 148G30 A 1 1 (6 ) ANSI BW 60 148G31 A 1 148G3421 Insert for (complete insert with float ball - without float housing) Insert for HFI 60 ( complete insert with float ball - without float housing) Insert for HFI ( complete insert with float ball - without float housing) Insert for HFI ( complete insert with float ball - without float housing) 148G3584 148G3663 148G3662 148G3661 Specials Special HFI valves with extra connections for drainage and pressure equalization are available on request. Please contact your local Danfoss sales office. 12 DKRCI.PD.GB0.A3.02 / 5H2143 Danfoss A/S (AC-AKC / frz), 12-07