MAKING MODERN LIVING POSSIBLE Technical brochure Modulating liquid level regulators, servo-controlled / PMFH and SV For modulating liquid level control in refrigeration, freezing and air conditioning plant, a system comprising a modulating servo-controlled main expansion valve type or PMFH, controlled by a pilot float valve type SV, is used. and SV systems are used on the evaporator side. PMFH and SV systems are used on the condenser side. The system is suitable for use with aonia or fluorinated refrigerants. The and PMFH can be used in liquid lines to or from evaporators separators intermediate coolers condensers receivers Modulating liquid level regulation provides liquid injection that is proportional to the actual capacity. This gives a constant amount of flashgas, thus ensuring stable regulation and economic operation because variations in pressure and temperature are held to a minimum. Features Applicable to all coon, non-flaable refrigerants, including R 717, and noncorrosive gases/liquids - dependent on sealing material compatability /PMFH are based on PM valve family housings Same flange prograe as for PM valve series Valve housing in low temperature cast iron (spherical) - EN GJS 4-18-LT Manual operation possible Position indicator available Pressure gauge connection to monitor inlet pressure Simple installation Main valve top cover can be located in any position without affecting the function Approvals Pressure Equipment Directive (PED) The / PMFH valves are approved and CE marked in accordance with Pressure Equipment Directive - 97/23/EC. For further details / restrictions - see Installation Instruction. /PMFH-valves* Nominal bore DN (1 in.) DN -1 (1 1 / 4-5 in.) DN 15 (6 in.) Classified for Fluid group I Catagory Article 3, paragraph 3 II III * CE is only applicable to the EN GJS 4-18-LT Danfoss A/S (AC.MCI/MWA), 212-5 DKRCI.PD.GH.A5.2 / H764 1
Technical data Refrigerants R 717, R 22, R 134a, R 44A and other fluorinated refrigerants. Max. working pressure / H: MWP = 28 bar SV: MWP = 28 bar Max. test pressure / H: Max. test pressure = 42 bar SV: Max. test pressure = 42 bar Temperature of media: 6 C to +12 C. Note: Max. working pressure is limited to MWP = 21 bar when media temperatures are: below 2 C for valves made of GGG-4.3 and below 1 C for valves made of GG-. 2 DKRCI.PD.GE.C5.2 / H39 Danfoss A/S (AC.MCI/MWA), 212-5
Design/Function 6. Seal plug 1. Valve spindle 12. Valve seat 19. Valve body 19a. Channel in valve body 2. Bottom cover 23. Main spring 24. Servo piston 24a. Channel in servo piston 3. Top cover 3a.b.c. Channels in top cover 31. Valve cone 43. Supplementary spring 44. Manometer connection 53. Spindle cap 6. Setting spindle 73. Pilot connection When the liquid level inside the float drops, the float orifice opens. This relieves the higher pressure, ps, acting on the servo piston to the low pressure side causing the to open. Variations in liquid level will result in variations To SV float in pressure over the piston and variation in the amount of liquid injected. It is important to choose the correct spring set when designing the plant. The spring set should be selected from the table below: Subcooling Pressure difference over main valve bar psi bar psi K F 4-15 58-218 1.2-4. 17-58 - 8-14 Normal spring set Weak spring set 8-4 14-72 Strong spring set The setting spindle, pos. 6, has not been set from factory. It is imperative that the setting spindle is adjusted before the valve is put into operation. The outer spring, pos. 23, is preset and the inner spring, pos. 43, is adjusted when turning the spindle. The following tables shows the adjustment of the inner spring in number of turns of the spindle as a function of valve size, spring type and pressure difference: C/w normal (factory mounted) spring set, subcooling -8 K ~ -14 F Pressure difference (Dp) over in bar or psi < 5 bar 5-8 bar 8-1 bar 1-12 bar > 12 bar < 72 psi 72-116 psi 116-145 psi 145-174 psi > 174 psi 8 No tension 2-3 3-4.5 4.5-6 ca. 7 1 No tension 3-5 5-7 7-9 ca. 1 2 No tension 3-5 5-7 7-9 ca. 1 3 No tension 4-6 6-9 9-12 ca. 14 C/w strong spring set, subcooling 8-4 K ~ 14-72 F Pressure difference (Dp) over in bar or psi 6-9 bar > 9 bar 87-131 psi > 131 psi 8 4 Max. tension 1 6 Max. tension 2 3 C/w stong spring set, subcooling 8-4 K ~ 14-72 F Pressure difference (Dp) over in bar or psi 6-16 bar 87-2 psi Spring must always be set to max. tension C/w weak spring set, low pressure plants Pressure difference (Dp) over in bar or psi 1.2-1.8 bar 1.8-2.5 bar 2.5-3 bar 3-4 bar 17-26 psi 26-36 psi 36-43 psi 43-58 psi 8 No tension 3-4 4-6 Max. tension 1 No tension 4-6 6-8 Max. tension 2 No tension 4-6 6-8 Max. tension 3 No tension 5-7 5-7 Max. tension Danfoss A/S (AC.MCI/MWA), 212-5 DKRCI.PD.GE.C5.2 / H39 3
Design/Function (continued) The values for spindle turns are an indication for an initial setting only. If a position indicator is used, a more precise modulation can be achieved when fine tuning the valve setting. If the is not opening fully, the spring tension must be reduced. If the is operating in a ON/OFF function, the spring tension should be increased. The condenser pressure will have an effect on the fine tuning and large variations in condensing pressure might call for readjustment. The subcooling is measured just before the and the pressure difference is for the valve only excluding piping and armatures. The can be used together with SV 4 as a pilot valve. The orifices determines the k v (C v ) value of the pilot and the following table can be used as an initial selection guide: 8 X 1 X 2 X SV 4-6 Ø 2.5 Ø 3 (SV 4) 3 X The final choice of orifice may vary depending on refrigerant and pressure levels. Smaller pressure levels needs a bigger orifice. Pressure difference levels below 3 bar (43 psi) need SV 4-6 with Ø3 orifice. function example From compressor To compressor From evaporator Condenser Alarm Alarm float switch Overflow valve Liquid level Through type receiver Filter Oil drain valve Low pressure float system (for explanatory purposes only) To evaporator SV floats for SV 4 can be used for low pressure control system. the float must be connected as shown. P-port: When using the P-port, it is possible to force open the valve to a fully open position. This is practical for service purposes or to confirm if the float has sufficient capacity for the and the operating conditions. However, when P-port connection is used it is possible to overfill a system due to constant bleeding or unauthorised tampering. In this case, its advisable to introduce a shut off when the liquid level reaches a preset point. Shut off can be done via an electrical switch if an EVM valve is mounted in the SII port in the top of the. It is only advisable to use the P-port connection at low subcooling, < 8 K (< 14 F). In general: If the float system is unstable, set a larger bleed. If the stays open when the float is closed, set a smaller bleed. S-port: The S-port offers the advantage of a preorifice which divides the pressure drop and any wear possibility due to cavitation. S-port connection must be used if the subcooling is higher than 8 K (14 F). The spindle should be opened 4 turns initially before adjustment. Adjustment should be done in steps of ¼ turn until the has a modulating function. The k v (C v ) value of the SV is higher using P-port than using S-port. A higher P-band can thus be obtained. 4 DKRCI.PD.GE.C5.2 / H39 Danfoss A/S (AC.MCI/MWA), 212-5
Design/Function (Continued) PMFH 3. Manometer connection 6. Seal plug 1. Valve spindle 19. Valve body 19a. Channel in valve body 2. Bottom cover 21a. Channel in servo piston 23. Main spring 24. Servo piston 3. Top cover 3a.b.c. Channels in top cover 31. Valve cone 53. Spindle cap 6. Manual opening 73. Pilot connection PMFH If the liquid level inside the SV float rises, the float orifice opens and relieves pressure through the pilot line to the top of the PMFH, increasing the pressure, ps, moving the pushrod downwards and opening the PMFH. The pilot line is connected in the topcover at SI. Override of the pilot signal can be made by using an EVM valve at SII. It is important to choose the correct spring set when designing the plant. The spring set should be selected from the table below: The PMFH can be used together with either SV 1 or 3 whith the SV mounted with the bleed valve downwards, refer to the drawing below. This reverses the opening so that rising float opens the orifice. Pressure difference over main valve bar psi bar psi - 4.5-65 > 4.5 > 65 Weak spring set Normal spring set PMFH function example From low stage compressor(s) To high stage compressor(s) From high stage compressor(s) Alarm float switch Alarm Condenser To low stage separator Intermediate pressure vessel Liquid trap receiver Filter To compressor cooling High pressure float system (for explanatory purposes only) Danfoss A/S (AC.MCI/MWA), 212-5 DKRCI.PD.GE.C5.2 / H39 5
Design/Function (Continued) SV 1-3 SV 1-3 float has 2 different pilot connections: S-port (series connection with PMFH) or P-port (parallel connection with the PMFH). P-port: When using the P-port, it is possible to force open the PMFH valve to a fully open position. This is practical for service purposes or to confirm if the float has sufficient capacity for the PMFH and the operating conditions. However, when P-port connection is used it is possible to overfill a system due to constant bleeding or unautorised tampering. In this case, it is advisable to introduce a shut off when the liquid level reaches a preset point. Shut off can be done via an electrical switch if an EVM valve is mounted in the SII port in the top of the PMFH. It is only advisable to use the P-port at low pressure difference. S-port: The S-port offers the advantage of a preorifice which divides the pressure drop and any wear possibility due to cavitation. S-port connection must be used at high pressure differences, dp > 1 bar (145 psi). The k v (C v ) value of the SV is higher using P-port than using S-port. A higher P-band can thus be obtained. Sizing Sizing example for Refrigerant R 717 (NH 3 ) Evaporator capacity Q e = 6 kw Evaporating temperature t e = C ( p e = 2.9 bar abs.) Condensing temperature t c = +3 C ( p c = 11.9 bar abs.) Liquid temperature ahead of valve t l = +2 C at max. capacity Subcooling t sub = t c t l = 3 C 2 C = 1 K Calculations do not take into account pressure loss in pipelines. Pressure drop across valve p = p c p e = 11.9 bar 2.9 bar = 9 bar Correction factor for 1 K subcooling.98 Corrected capacity 6 kw.98 = 588 kw The corrected capacity can be found in the capacity table. It will be seen from the table that valve type 8-4 should be chosen. Refering to ordering table, code number 27F53 can be found. For details of flanges, accessories and pilot valve, see the ordering table. Since p = 9 bar and t sub = 1 K, it will be seen from the C/w strong spring set for that a STRONG spring set must be used. The pilot line is connected to SV at connection S. In the ordering table the code number for the spring set can be found: 27F118. Sizing example for PMFH Refrigerant R 717 (NH 3 ) Evaporator capacity Q e = 22 kw Evaporating temperature t e = C ( p e = 2.9 bar abs.) Condensing temperature t c = +3 C ( 11.9 bar abs.) Liquid temperature ahead of valve t l = +2 C Subcooling t sub = t c t l = 3 C 2 C = 1 K Calculations do not take into account pressure loss in pipelines. Pressure drop across valve p = p c p e = 11.9 bar 2.9 bar = 9 bar Correction factor for 1 K subcooling.98 Corrected capacity 22 kw.98 = 2156 kw The corrected capacity can be found in the capacity table. It will be seen from the table that valve type PMFH 8-7 should be chosen. In the ordering table the code number for the valve can be found: 27F36 for CE-approved valve. For details of flanges, accessories and pilot valve, see the ordering table. Correction factors When dimensioning, multiply the evaporator capacity by a correction factor k dependent on the subcooling t sub just ahead of the valve. The corrected capacity can then be found in the capacity table. R 717 (NH 3 ) t K 2 4 1 15 2 3 35 4 45 5 k 1.1 1..98.96.94.92.91.89.87.86.85 R 22 t K 2 4 1 15 2 3 35 4 45 5 k 1.1 1..96.93.9.87.85.83.8.78.77 6 DKRCI.PD.GE.C5.2 / H39 Danfoss A/S (AC.MCI/MWA), 212-5
Capacity in kw Type Evaporating temperature t e C Rated capacity in kw at pressure drop across valve p bar Type Evaporating temperature t e Rated capacity in kw at pressure drop across valve p bar.8 1.2 1.6 2. C 4. 8. 12. 16. R 717 (NH 3 ) R 717 (NH 3 ) 8-1 +1 2 4 5 8-2 +1 2 4 5 8-3 +1 2 4 5 8-4 +1-2 4 5 8-5 +1 2 4 5 8-6 +1 2 4 5 8-7 +1 2 4 5 1 +1 2 4 5 2 +1 2 4 5 3 +1 2 4 5 5 51 53 54 55 56 56 8 83 85 86 88 89 9 127 131 134 137 139 14 139 26 214 219 222 224 223 219 5 336 344 347 345 338 7 565 584 591 587 571 546 881 99 91 887 844 794 75 14 145 146 145 14 133 126 2 2 234 231 222 211 2 342 353 356 35 337 319 33 6 62 64 65 66 67 67 97 11 13 15 16 17 16 154 159 163 164 167 166 164 9 264 267 267 263 7 394 46 413 414 47 396 383 682 7 75 692 666 636 68 16 18 17 13 975 921 875 169 173 174 17 163 155 1 271 277 278 271 9 2 234 411 421 421 41 391 371 354 69 71 73 74 75 79 75 111 115 118 119 12 12 119 176 182 186 188 188 187 184 286 295 31 33 31 295 288 449 463 47 468 458 444 429 773 792 795 777 746 712 684 119 121 119 115 19 13 984 191 195 195 193 182 173 166 36 312 312 33 289 275 263 465 474 473 459 437 416 398 76 79 81 82 83 86 82 123 127 13 1 133 1 131 194 21 27 27 21 316 7 333 334 33 3 315 496 511 518 514 6 47 851 869 871 85 816 781 751 13 131 13 1 119 113 18 21 214 214 28 199 19 183 336 342 341 331 316 29 499 518 517 51 478 456 438 8-1 +1 2 4 5 8-2 PMFH 8-2 8-3 PMFH 8-3 8-4 PMFH 8-4 8-5 PMFH 8-5 P MFL 8-6 PMFH 8-6 8-7 PMFH 8-7 1 PMFH 1 2 PMFH 2 3 PMFH 3 +1 2 4 5 +1 2 4 5 +1-2 4 5 +1 2 4 5 +1 2 4 5 +1 2 4 5 +1 2 4 5 +1 2 4 5 +1 2 4 5 PMFH 5 +1 2 4 5 14 17 11 111 111 111 19 167 172 176 177 177 175 173 264 271 276 278 276 272 267 427 438 444 445 439 429 42 667 679 685 68 666 649 6 113 113 113 111 18 15 12 169 167 166 163 158 153 149 277 277 277 272 265 7 249 441 442 44 433 421 396 669 669 666 655 636 617 599 17 17 16 14 11 983 954 14 142 143 143 143 142 14 224 227 228 238 227 2 222 353 356 357 356 353 349 343 571 573 572 568 561 5 543 887 883 874 864 8 837 823 149 146 143 141 138 136 134 222 215 29 21 197 194 365 357 35 343 337 3 6 581 568 555 545 536 6 517 881 86 84 824 81 796 782 141 137 134 131 129 127 124 161 165 166 166 165 162 16 7 264 265 264 262 8 3 44 414 416 413 47 4 393 651 664 665 657 647 635 624 11 12 12 1 984 966 9 167 169 167 164 161 157 154 2 247 241 235 23 2 41 414 49 41 392 384 377 653 659 651 637 624 611 599 988 998 985 965 943 924 95 158 159 157 154 15 147 144 176 178 179 179 177 175 281 284 285 284 281 277 44 444 445 443 438 431 74 79 79 74 696 685 18 18 18 17 16 14 178 178 177 176 173 171 261 261 261 9 5 1 435 435 434 43 424 418 692 692 69 683 674 664 15 15 14 13 12 1 167 167 167 165 163 16 Danfoss A/S (AC.MCI/MWA), 212-5 DKRCI.PD.GE.C5.2 / H39 7
Capacity in kw (continued) Type Evaporating temperature t e C 8-1 +1 2 4 5 8-2 1 2 4 5 8-3 1 2 4 5 8-4 1 2 4 5 8-5 1 2 4 5 8-6 1 2 4 5 8-7 1 2 4 5 1 1 2 4 5 2 1 2 4 5 3 1 2 4 5 Rated capacity in kw at pressure drop across valve p bar Type Evaporating temperature t e Rated capacity in kw at pressure drop across valve p bar.8 1.2 1.6 2. C 4. 8. 12. 16. 11 12 12 12 13 13 13 18 19 2 2 21 21 21 29 3 31 33 34 34 47 49 51 54 54 55 74 78 8 83 84 84 84 129 135 14 142 143 141 137 22 211 216 218 215 29 2 1 336 346 3 3 346 335 515 538 555 563 561 55 5 782 819 843 855 851 833 84 13 14 15 15 15 16 16 22 23 24 24 35 36 37 39 39 4 4 57 59 61 63 64 64 64 89 94 96 99 99 99 97 156 162 167 168 167 163 158 242 1 6 5 249 24 23 386 42 412 415 41 399 386 618 645 66 663 653 635 612 94 98 1 11 99 961 9 15 16 17 17 17 18 18 26 27 28 28 28 28 39 41 43 44 44 45 44 64 67 7 71 72 72 71 12 17 11 112 112 11 18 177 184 188 189 186 181 175 273 283 286 283 275 265 4 437 455 464 464 455 442 426 7 728 742 74 7 72 677 16 111 113 112 11 16 12 R 22 R 22 17 18 18 19 19 19 19 27 29 3 3 31 31 31 43 46 47 49 71 74 77 78 78 78 77 112 117 121 122 122 12 117 194 22 26 22 196 189 299 38 311 37 298 286 275 479 498 57 55 494 478 461 767 796 81 85 786 76 7 117 121 123 122 119 115 111 8-1 +1 2 4 5 8-2 PMFH 8-2 8-3 PMFH 8-3 8-4 PMFH 8-4 8-5 PMFH 8-5 8-6 PMFH 8-6 8-7 PMFH 8-7 1 PMFH 1 2 PMFH 2 3 PMFH 3 1 2 4 5 1 2 4 5 1 2 4 5 1 2 4 5 1 2 4 5 1 2 4 5 1 2 4 5 1 2 4 5 1 2 4 5 PMFH 5 1 2 4 5 22 23 24 24 36 38 39 4 4 4 39 57 6 62 63 63 62 61 94 98 11 12 11 99 97 147 153 157 157 156 1 1 1 26 263 262 7 249 241 381 39 393 389 378 366 353 62 639 647 643 628 69 589 99 12 13 12 1 969 937 15 155 156 155 151 147 142 241 2 2 242 234 226 28 29 3 3 3 3 29 46 47 47 72 74 76 76 76 75 73 118 121 123 123 122 12 117 184 188 19 189 187 184 179 31 314 315 313 38 294 466 467 465 461 454 444 433 763 77 771 767 755 739 72 122 123 123 122 12 117 115 185 186 186 185 182 178 173 295 297 297 295 29 284 277 31 31 51 51 49 8 82 82 82 81 79 77 13 133 133 1 13 127 124 22 23 199 195 189 341 343 341 335 8 312 51 51 54 495 3 471 458 837 842 835 821 84 784 762 133 134 133 131 128 1 121 22 23 21 198 193 189 183 4 5 1 316 39 31 293 33 34 34 33 53 54 54 53 51 82 84 85 85 83 81 79 133 136 138 137 134 131 127 26 211 212 21 26 2 194 345 3 353 3 34 331 1 515 4 3 516 53 9 473 847 864 865 853 834 81 785 135 138 138 136 133 129 1 28 29 26 21 195 189 7 333 333 9 1 312 8 DKRCI.PD.GE.C5.2 / H39 Danfoss A/S (AC.MCI/MWA), 212-5
Material specification PMFH Material specification for /PMFH valves No. Part Material DIN/EN ISO ASTM 2 Gasket between body and flange Non-metal Non-asbestos 3 Bolts for flange Stainless steel A2-7 A2-7 Type 38 4 Flange PM 5-65 Steel RSt. 37-2, 1 Fe36 B, 63 Grade C, A 283 6 Plug Steel 9SMn28 1651 1 Valve spindle Steel 9SMn28 1651 12 Valve seat Teflon [PTFE] 19 Valve body Low temperature cast iron (spherical) 2 Bottom cover Low temperature cast iron (spherical) 23 Spring Steel EN-GJS-4-18-LT EN-1693 EN-GJS-4-18-LT EN-1693 Type 2 R683/9 Type 2 R683/9 1213 SAE J 43 1213 SAE J 43 24 Servo piston Cast iron GG- Grade Class 4B 3 Cover Low temperature cast iron (spherical) 31 Trottle cone Steel 9SMn28 1651 Gasket between body and bottom cover 34 Bolts for top and bottom cover Non-metal Non-asbestos 41 Gasket Non-metal Non-asbestos 43 Spring Steel EN-GJS-4-18-LT EN-1693 Type 2 R683/9 1213 SAE J 43 Stainless steel A2-7 A2-7 Type 38 53 Spindle cap Steel 9SMn28 1651 6 Setting / manual operating spindle Steel 9SMn28 1651 73 Pilot connection Steel 9SMn28 1651 Type 2 R683/9 Type 2 R683/9 Type 2 R683/9 1213 SAE J 43 1213 SAE J 43 1213 SAE J 43 Danfoss A/S (AC.MCI/MWA), 212-5 DKRCI.PD.GE.C5.2 / H39 9
Ordering Rated capacity in kw (1 kw =.284 TR) Valve type R 717 R 22 R 134a R 44A R 12 R /H 8-1 /H 8-2 /H 8-3 /H 8-4 /H 8-5 /H 8-6 /H 8-7 /H 1 /H 2 /H 3 /H 5 139 29 3 558 835 1395 28 3 558 835 139 27.8 41.8 7 15 174 278 435 7 15 174 278 22.1 35.3 53.1 88.9 133 221 353 5 889 1333 221 33 49.7 82.7 124 27 33 569 831 1243 268 33 17.4 27.8 41.8 7 15 174 278 435 7 15 174 3 45.2 75.2 113 188 3 47 755 113 188 3 The rated capacity is given at evaporating temperature t e = +5 C, condensing temperature t c = + C and liquid temperature t l = +28 C. Main valve Valve type 8-1 8-2 8-3 8-4 8-5 8-6 8-7 1 2 3 EN GJS 4-18-LT 27F354 27F355 27F356 27F357 27F358 27F359 27F36 27F361 27F362 27F363 Valve type PMFH 8-2 PMFH 8-3 PMFH 8-4 PMFH 8-5 PMFH 8-6 PMFH 8-7 PMFH 1 PMFH 2 PMFH 3 PMFH 5 EN GJS 4-18-LT 27F365 27F366 27F367 27F368 27F369 27F37 27F371 27F372 27F373 27F374 The code nos. stated apply to main valves type or PMFH incl. flange gaskets, flange bolts, blanking plug and pilot connection with Ø6.5 / Ø1 weld nipple ( 3 / 8 in. flare connection can be supplied, code no. 27F115). Spring set Special spring set for Subcooling t u K Pressure drop p in 4 15 bar 1.2 4 bar Spring set Pilot connection on SV 1-3 only Pos. Type -8 "STANDARD" "WEAK" P 23 + 43 8-1 8-7 8-4 "STRONG" S 1 2 3 "WEAK" 27F123 27F124 27F1 27F126 "STRONG" 27F118 27F119 27F12 27F121 Weak/Strong Special spring set for PMFH Pressure drop in PMFH p bar 1 4 Type PMFH 8.1 7 PMFH 1 PMFH 2 PMFH 3 "WEAK" 27F219 27F2191 27F2192 27F2193 1 DKRCI.PD.GE.C5.2 / H39 Danfoss A/S (AC.MCI/MWA), 212-5
Ordering (continued) Flanges 2 ) Valve type Flange type Weld flanges Solder flanges 8 / PMFH 8 1 / PMFH 1 2 / PMFH 2 3 / PMFH 3 12 3 / 4 1 1 1 / 4 in. 1 ) in. 1 ) 1 ) 27N122 27N12 27N123 23 1 1 / 4 27N23 1 1 / 2 27N234 24 1 1 / 2 2 PMFH 5 26 2 1 / 2 3 27N244 27N245 2 27N5 2 1 / 2 27N65 27N2665 27N268 1 ) applies to one flange set consisting of one inlet and one outlet flange. 2 ) Dimension sketch see spare part catalogue. 7 / 8 27L1223 1 1 / 8 27L1229 22 28 27L1222 27L1228 1 3 / 8 27L2335 35 27L2335 1 5 / 8 27L2441 42 27L2442 2 1 / 8 27L54 54 27L54 2 5 / 8 27L2666 76 27L2676 Stainless steel: flanges, bolts for flanges and top and bottom covers, see spare parts catalogue. Pilot valves SV 1-3 Type Connection Float pilot valve type SV Balance tube liquid / vapour 1 in. weld Pilot line SV 1: 27B221 Ø 6.5 / Ø 1 weld 1 ) 27B221CE 2 ) 1 ) 3 / 8 in. flare connection can be supplied under code no. 27B233. 2 ) Approved and CE-marked in accordance with Pressure Equipment Directive - 97/23/EC. SV 3: 27B223 27B223CE 2 ) Pilot valves SV 4 Valve type Orifice diameter without housing 1 ) SV 4 Ø 3. 27B224 2 ) 27B214 2 ) 1 ) Flange for mounting without housing 27B227. 2 ) Approved and CE-marked in accordance with Pressure Equipment Directive - 97/23/EC. The code nos. stated apply to liquid level regulators type SV 4, 5 and 6 with two 1 weld connections for balance tubes and two ½ weld joints for liquid and evaporator connections respectively. Spare parts and accessories Smaller orifices for the SV 4 are available as spare parts. Seal kit: 27B27 Special orifice code no. for SV 4 Orifice diameter k v 1 ) Ø 1.,26 27B28 Ø 1.5,6 27B281 Ø 2..1 27B282 Ø 2.5,16 27B283 Ø 2.8.2 27B284 1 ) The code no. includes orifice and all necessary gaskets Pilot valve kits (EVM and coil) Can be screwed on to the or PMFH instead of the blanking plug. Coils, 1 W a.c. a.c.: 27B1122xx where xx can be 11 V, 6 Hz 21 22 V, 5 Hz 31 22 V, 5/6 Hz 24 V, 5 Hz 33 Danfoss A/S (AC.MCI/MWA), 212-5 DKRCI.PD.GE.C5.2 / H39 11
Ordering (continued) Optional accessories Description Pressure gauge connection Ø 6.5 / Ø 1 weld / solder Pressure gauge connection 1 / 4 in. flare (self-closing) (Must not be used in aonia plant) Pressure gauge connection Cutting ring connection 6 1 27B235 27B241 27B263 27B264 Pressure gauge connection 1 / 4 NPT 27B262 Damping cylinder for PMFH 8 5 27F2195 Function indicator Description Function indicator Can be fitted in place of the main valve bottom plug. When the protective cap of the indicator is removed, the degree of opening of the -regulator can be observed in relation to the degree of opening of the SV pilot valve. Note: The function indicator must be considered as a very important tool for the accurate adjustment of the spring pressure. Manual operating unit for. Can be fitted in place of the regulator bottom plug 27F85 27F128 3 / 8 in. flare pilot connection for and PMFH 27F115 3 / 8 in. flare pilot connection for SV 27B233 Dimensions and weights /PMFH Type PMFH H 1 H 2 H 3 H 4 H 5 L L 1 1 W L 5 max. 2 W B 1 B 2 B 3 Weight excl. solenoid valve kg 8 66 162 79 113 176 177 16 13 14 75 87 7. 1 72 178 96 128 193 24 17 13 14 84 82 94 11.3 2 79 187 15 138 22 4 17 13 14 94 89 12 14.2 3 95 123 155 22 288 2 13 14 14 16 113 19.8 PMFH 5 19 227 146 176 242 342 13 14 127 113 135 28.3 www.danfoss.com/ir 12 DKRCI.PD.GE.C5.2 / H39 Danfoss A/S (AC.MCI/MWA), 212-5