Modulating liquid level regulators, servo-controlled · Technical leaflet Modulating liquid level regulators, servo ... by a pilot float ... Technical leaflet Modulating liquid level

Modulating liquid level regulators, servo-controlledType PMFL / PMFH and SV

REFRIGERATION AND AIR CONDITIONING Technical leaflet

� RD�CB40� Danfoss A/S (RC-CMS/MWA), 10 - �004

Technical leaflet Modulating liquid level regulators, servo-controlled, type PMFL / PMFH and SV

Contents Page

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

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

Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Design/Function

PMFL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

PMFH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Capacity in kW

R 717 (NH3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

R �� . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Material specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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

Dimensions and weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Danfoss A/S (RC-CMS/MWA), 10 - �004 RD�CB40� 3


Introduction

For modulating liquid level control in refrigeration,freezing and air conditioning plant, a system comprising a modulating servo-controlled main expansion valve type PMFL or PMFH, controlled by a pilot float valve type SV, is used .

PMFL and SV systems are used on the evaporatorside . PMFH and SV systems are used on thecondenser side .The system is suitable for use with ammonia orfluorinated refrigerants . The PMFL and PMFH can be used in liquid lines to or from

evaporators

separators

intermediate coolers

condensers

receivers

Modulating liquid level regulation provides liquidinjection that is proportional to the actualcapacity . This gives a constant amount of flashgas, thus ensuring stable regulation andeconomic operation because variations inpressure and temperature are held to a minimum .

Technical data RefrigerantsR 717, R ��, R 134a, R 404A and other fluorinatedrefrigerants .

Max. working pressurePMFL / H: MWP = �8 barSV: MWP = �8 bar

Max. test pressurePMFL / H: Max . test pressure = 4� barSV: Max . test pressure = 4� bar

Features Applicable to all common, non-flammable refrigerants, including R 717, and non-corrosive gases/liquids - dependent on sealing material compatability

PMFL/PMFH are based on PM valve family housings

Same flange programme as for PM valve series

Valve housing in low temperature cast iron (spherical) - EN GJS 400-18-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

Pressure Equipment Directive (PED)The PMFL / PMFH valves are approved and CEmarked in accordance with Pressure Equipment

Directive - 97/�3/EC .For further details / restrictions - see InstallationInstruction .

* CE is only applicable to the EN GJS 400-18-LT

PMFL/PMFH-valves*

Nominal bore DN≤ �5 (1 in .) DN 3�-1�5 mm (11/4 - 5 in .) DN 150 mm (6 in .)

Classified for Fluid group I

Catagory Article 3, paragraph 3 II III

Temperature of media: –60°C to +1�0°C .

Note: Max . working pressure is limited toMWP = �1 bar when media temperatures are:below –�0°C for valves made of GGG-40 .3 andbelow –10°C for valves made of GG-�5 .

4 RD�CB40� Danfoss A/S (RC-CMS/MWA), 10 - �004


Design/Function

PMFL

6 . Seal plug10 . Valve spindle1� . Valve seat19 . Valve body19a . Channel in valve body�0 . Bottom cover�3 . Main spring�4 . Servo piston�4a . Channel in servo piston30 . Top cover30a .b .c . Channels in top cover31 . Valve cone43 . Supplementary spring44 . Manometer connection53 . Spindle cap60 . Setting spindle73 . 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 PMFL to open . Variations in liquid level will result in variations

The setting spindle, pos . 60, 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 . �3, is preset and the inner spring, pos . 43, is adjusted when

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:

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:

PMFL

→ To SV float

SubcoolingPressure difference over main valve

bar psi bar psi

K F 4 - 15 58 - �18 1 .� - 4 .0 17 - 58

0 - 8 0 - 14 Normal spring set Weak spring set

8 - 40 14 - 7� Strong spring set

PMFL

C/w normal (factory mounted) spring set, subcooling 0-8 K ~ 0-14 F

Pressure difference (Dp) over PMFL in bar or psi

< 5 bar 5 - 8 bar 8 - 10 bar 10 - 1� bar > 1� bar

< 7� psi 7� - 116 psi 116 - 145 psi 145 - 174 psi > 174 psi

80 No tension � - 3 3 - 4 .5 4 .5 - 6 ca . 7

1�5 No tension 3 - 5 5 - 7 7 - 9 ca . 10

�00 No tension 3 - 5 5 - 7 7 - 9 ca . 10

300 No tension 4 - 6 6 - 9 9 - 1� ca . 14

PMFL

C/w strong spring set, subcooling 8-40 K ~ 14-7� F


6 - 9 bar > 9 bar

87 - 131 psi > 131 psi

80 4 Max . tension

1�5 6 Max . tension

PMFL C/w stong spring set, subcooling 8-40 K ~ 14-7� F


6 - 16 bar

87 - �3� psi

�00Spring must always be set to max . tension

300

PMFL

C/w weak spring set, low pressure plants


1 .� - 1 .8 bar 1 .8 - � .5 bar � .5 - 3 bar 3 - 4 bar

17 - �6 psi �6 - 36 psi 36 - 43 psi 43 - 58 psi

80 No tension 3 - 4 4 - 6 Max . tension

1�5 No tension 4 - 6 6 - 8 Max . tension

�00 No tension 4 - 6 6 - 8 Max . tension

300 No tension 5 - 7 5 - 7 Max . tension



Design/Function(continued)

The values for spindle turns are an indication foran initial setting only . If a position indicator is used, a more precise modulation can be achieved when fine tuning the valve setting . If the PMFL is not opening fully, the spring tension must be reduced . If the PMFL 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 PMFLand the pressure difference is for the valve onlyexcluding piping and armatures .

The PMFL can be used together with either SV 1-3or SV 4-6 as the pilot valve .

The final choice of orifice may vary depending onrefrigerant and pressure levels . Smaller pressurelevels needs a bigger orifice . Pressure differencelevels below 3 bar (43 psi) need SV 3 or SV 4-6with Ø3 mm orifice .

PMFL function example

From compressor To compressor

From evaporator

Condenser Alarm Alarmfloat switch

Through type receiver

Liquid level

Overflowvalve

Filter

Oil drain valve

To evaporatorLow pressure float system(for explanatory purposes only)

Both the SV 1-3 and SV 4-6 can be used for PMFLlow pressure control system . If SV 4-6 is used asshown above, the float must be connected asshown .

If SV 1-3 float is used, this has � different pilotconnections: S-port (series connection with thePMFL) or P-port (parallel connection with thePMFL) .

P-port:When using the P-port, it is possible to force openthe PMFL valve to a fully open position . This ispractical for service purposes or to confirm if thefloat has sufficient capacity for the PMFL and theoperating conditions . However, when P-portconnection is used it is possible to overfill a system due to constant bleeding or unauthorisedtampering . In this case, its advisable to introduce a shut off when the liquid level reaches a presetpoint . Shut off can be done via an electrical

switch if an EVM valve is mounted in the SII port in the top of the PMFL . 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 PMFL stays open when the float is closed, set a smaller bleed .

S-port:The S-port offers the advantage of a preorificewhich divides the pressure drop and any wearpossibility 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 PMFL has a modulating function . The kv (Cv) value of the SV is higher using S-port than using

SV floats for PMFL

The orifices determines the kv (Cv) value of the pilot and the following table can be used as an initial selection guide:

PMFLSV 1-3 SV 4-6

SV 1 SV 3 Ø � .5 Ø 3 (SV 4)

80 X X

1�5 X X

�00 X X

300 X X



Design/Function(Continued)

PMFH

If the liquid level inside the SV float rises, the floatorifice opens and relieves pressure through thepilot line to the top of the PMFH, increasing thepressure, 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:

PMFH

PMFH function exampleFrom low stagecompressor(s)

To high stagecompressor(s)

From high stagecompressor(s)

To low stageseparator

Condenser

Alarmfloatswitch

Intermediatepressurevessel

Liquid trapreceiver

Filter

Tocompressorcooling

High pressure float system(for explanatory purposes only)

Alarm

3 . Manometer connection6 . Seal plug10 . Valve spindle19 . Valve body19a . Channel in valve body�0 . Bottom cover�1a . Channel in servo piston�3 . Main spring�4 . Servo piston30 . Top cover30a .b .c . Channels in top cover31 . Valve cone53 . Spindle cap60 . Manual opening73 . Pilot connection

The PMFH can be used together with either SV 1or 3 whith the SV mounted with the bleed valvedownwards, refer to the drawing below . Thisreverses the opening so that rising float opens the orifice .

Pressure difference over main valve

bar psi bar psi

0 - 4 .5 0 - 65 > 4 .5 > 65

Weak spring set Normal spring set



SV 1-3 float has � 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 openthe PMFH valve to a fully open position . This ispractical for service purposes or to confirm if thefloat has sufficient capacity for the PMFH and theoperating conditions . However, when P-portconnection 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 preorificewhich divides the pressure drop and any wearpossibility due to cavitation . S-port connection must be used at high pressure differences, dp > 10 bar (145 psi) . The kv (Cv) value of the SV is higher using S-port than using P-port . A higher P-band can thus be obtained .

Design/Function(Continued)

SV 1-3



Sizing Sizing example for PMFL

RefrigerantR 717 (NH3)

Evaporator capacityQe = 600 kW

Evaporating temperaturete = −10°C (∼ pe = � .9 bar abs .)

Condensing temperaturetc = +30°C (∼ pc = 11 .9 bar abs .)

Liquid temperature ahead of valvetl = +�0°C at max . capacity

Subcooling∆tsub = tc − tl = 30°C − �0°C = 10 KCalculations do not take into account pressureloss in pipelines .

Pressure drop across valve∆p = pc − pe = 11 .9 bar − � .9 bar = 9 bar

Correction factor for 10 K subcooling0 .98

Corrected capacity600 kW × 0 .98 = 588 kW

The corrected capacity can be found in thecapacity table . It will be seen from the table thatvalve type PMFL 80-4 should be chosen .Refering to “ordering table”, code number027F0053 can be found .For details of flanges, accessories and pilot valve,see the ordering table .

Since ∆p = 9 bar and ∆tsub = 10 K, it will beseen from the “C/w strong spring set” for PMFLthat a “STRONG” spring set must be used . Thepilot line is connected to SV at connection S . In the ordering table the code number for the spring set can be found: 027F0118 .

Sizing example for PMFH

RefrigerantR 717 (NH3)

Evaporator capacityQe = ��00 kW

Evaporating temperaturete = −10°C (∼ pe = � .9 bar abs .)

Condensing temperaturetc = +30°C (∼ 11 .9 bar abs .)

Liquid temperature ahead of valvetl = +�0°C

Subcooling∆tsub = tc − tl = 30°C − �0°C = 10 KCalculations do not take into account pressureloss in pipelines .

Pressure drop across valve∆p = pc − pe = 11 .9 bar − � .9 bar = 9 bar

Correction factor for 10 K subcooling0 .98

Corrected capacity��00 kW × 0 .98 = �156 kW

The corrected capacity can be found in thecapacity table . It will be seen from the table thatvalve type PMFH 80-7 should be chosen .In the ordering table the code number for thevalve can be found: 027F3060 for CE-approvedvalve .

For details of flanges, accessories and pilotvalve, see the ordering table .

Correction factorsWhen dimensioning, multiply the evaporatorcapacity by a correction factor k dependent on

the subcooling ∆tsub just ahead of the valve .The corrected capacity can then be found in the capacity table .

R 717 (NH3)∆t K � 4 10 15 �0 �5 30 35 40 45 50

k 1 .01 1 .00 0 .98 0 .96 0 .94 0 .9� 0 .91 0 .89 0 .87 0 .86 0 .85

R 22∆t K � 4 10 15 �0 �5 30 35 40 45 50

k 1 .01 1 .00 0 .96 0 .93 0 .90 0 .87 0 .85 0 .83 0 .80 0 .78 0 .77



Capacity in kW

Type Evaporatingtemperature te

°C

Rated capacity in kWat pressure drop across valve ∆p bar


°C


0 .8 1 .� 1 .6 � .0 4 .0 8 .0 1� .0 16 .0

R 717 (NH3) R 717 (NH3)PMFL 80-1 +10

0−10−�0−30−40−50

50515354555656

606�6465666767

69717374757975

7679818�83868�

PMFL 80-1 +100

−10−�0−30−40−50

104107110111111111109

14014�14314314314�140

16116516616616516�160

176178179179177175

PMFL 80-� +100

−10−�0−30−40−50

80838586888990

97101103105106107106

1111151181191�01�0119

1�31�713013�13313�131

PMFL 80-�PMFH 80-�

+100

−10−�0−30−40−50

16717�176177177175173

��4��7��8�38��7��5��

�57�64�65�64�6��58�53

�81�84�85�84�81�77

PMFL 80-3 +100

−10−�0−30−40−50

1�7131134137139140139

154159163164167166164

17618�186188188187184

194�01�05�07�07�05�01

PMFL 80-3PMFH 80-3

+100

−10−�0−30−40−50

�64�71�76�78�76�7��67

353356357356353349343

404414416413407400393

440444445443438431

PMFL 80-4 +100

−10-�0−30−40−50

�06�14�19��4��3�19

�50�59�64�67�67�63�57

�86�95301303301�95�88

3163�73333343303�3315

PMFL 80-4PMFH 80-4

+100

−10-�0−30−40−50

4�74384444454394�94�0

57157357�56856155�543

6516646656576476356�4

704709709704696685

PMFL 80-5 +100

−10−�0−30−40−50

3�53363443473453383�7

394406413414407396383

4494634704684584444�9

49651151851450�486470

PMFL 80-5PMFH 80-5

+100

−10−�0−30−40−50

66767968568066664963�

88788387486485�8378�3

101010�010�01000984966948

108010801080107010601040

PMFL 80-6 +100

−10−�0−30−40−50

5655845915875715465�0

68�70070569�666636608

77379�79577774671�684

851869871850816781751

P MFL 80-6PMFH 80-6

+100

−10−�0−30−40−50

11301130113011101080105010�0

1490146014301410138013601340

1670169016701640161015701540

178017801770176017301710

PMFL 80-7 +100

−10−�0−30−40−50

881909910887844794750

10601080107010309759�1875

11901�101190115010901030984

1300131013001�50119011301080

PMFL 80-7PMFH 80-7

+100

−10−�0−30−40−50

1690167016601630158015301490

��0�150�090�050�01019701940

�480�500�470�410�350�300��50

�610�610�610�590�550�510

PMFL 1�5 +100

−10−�0−30−40−50

1400145014601450140013301�60

1690173017401700163015501480

191019501950193018�017301660

�100�140�140�080199019001830

PMFL 1�5PMFH 1�5

+100

−10−�0−30−40−50

�770�770�770�7�0�650�570�490

3650357035003430337033�03�60

410041404090401039�038403770

43504350434043004�404180

PMFL �00 +100

−10−�0−30−40−50

��50�3�0�340�310��0�110�000

�710�770�780�710�590�480�340

306031�031�03030�890�750�630

336034�034103310316030�0�900

PMFL �00PMFH �00

+100

−10−�0−30−40−50

441044�0440043304�1040803960

581056805550545053605�605170

65306590651063706�4061105990

69�069�06900683067406640

PMFL 300 +100

−10−�0−30−40−50

34�0353035603500337031903030

41104�104�104100391037103540

4650474047304590437041603980

4990518051705010478045604380

PMFL 300PMFH 300

+100

−10−�0−30−40−50

6690669066606550636061705990

8810860084008�408100796078�0

988099809850965094309�409050

1050010500104001030010�0010000

PMFH 500 +100

−10−�0−30−40−50

107001070010600104001010098309540

141001370013400131001�9001�7001�400

15800159001570015400150001470014400

167001670016700165001630016000



Capacity in kW (continued)


°C



°C


0 .8 1 .� 1 .6 � .0 4 .0 8 .0 1� .0 16 .0

R 22 R 22PMFL 80-1 +10

0−10−�0−30−40−50

111�1�1�131313

13141515151616

15161717171818

17181819191919

PMFL 80-1 +100

−10−�0−30−40−50

��3�4�5�5�5�4

�8�930303030�9

313�3�3�3�3�31

3�333434333�3�

PMFL 80-� 100

−10−�0−30−40−50

1819�0�0�1�1�1

��3�4�4�5�5�5

�5�6�7�8�8�8�8

�7�93030313131

PMFL 80-�PMFH 80-�

100

−10−�0−30−40−50

36383940404039

46474848484847

515�5�5�5�5149

5�535454535�51

PMFL 80-3 100

−10−�0−30−40−50

�930313�333434

35363739394040

39414344444544

43464748484948

PMFL 80-3PMFH 80-3

100

−10−�0−30−40−50

57606�63636�61

7�747676767573

808�8�8�817977

8�848585838179

PMFL 80-4 100

−10−�0−30−40−50

4749515�545455

57596163646464

646770717�7�71

71747778787877

PMFL 80-4PMFH 80-4

100

−10−�0−30−40−50

9498

10110�1019997

1181�11�31�31��1�0117

13013313313�1301�71�4

1331361381371341311�7

PMFL 80-5 100

−10−�0−30−40−50

74788083848484

89949699999997

10�10711011�11�110108

11�1171�11��1��1�0117

PMFL 80-5PMFH 80-5

100

−10−�0−30−40−50

14715315715715615�148

184188190189187184179

�0��05�05�03199195189

�06�11�1��10�06�00194

PMFL 80-6 100

−10−�0−30−40−50

1�913514014�143141137

15616�167168167163158

177184188189186181175

194�0��06�05�0�196189

PMFL 80-6PMFH 80-6

100

−10−�0−30−40−50

�51�60�63�6��57�49�41

31031431531330830��94

3413433413353�83�031�

34535�3533483403313�1

PMFL 80-7 100

−10−�0−30−40−50

�0��11�16�18�15�09�00

�4��51�56�55�49�40�30

�73�83�86�83�75�65�54

�99308311307�98�86�75

PMFL 80-7PMFH 80-7

100

−10−�0−30−40−50

381390393389378366353

466467465461454444433

510510504495483471458

5155�45�3516503489473

PMFL 1�5 100

−10−�0−30−40−50

3�133634635�35�346335

38640�41�415410399386

43745546446445544�4�6

479498507505494478461

PMFL 1�5PMFH 1�5

100

−10−�0−30−40−50

6�06396476436�8609589

7637707717677557397�0

83784�8358�180478476�

847864865853834810785

PMFL �00 100

−10−�0−30−40−50

51553855556356155053�

61864566066365363561�

7007�874�7407�570�677

76779681080578676073�

PMFL �00PMFH �00

100

−10−�0−30−40−50

99010�0103010�01000969937

1��01�301�301��01�0011701150

13301340133013101�801�501�10

135013801380136013301�901�50

PMFL 300 100

−10−�0−30−40−50

78�819843855851833804

940980

100010109909619�5

10601110113011�01100106010�0

11701�101�301��0119011501110

PMFL 300PMFH 300

100

−10−�0−30−40−50

15001550156015501510147014�0

185018601860185018�017801730

�0�0�030�0101980193018901830

�050�080�090�060�01019501890

PMFH 500 100

−10−�0−30−40−50

�410�480�500�480�4�0�340��60

�950�970�970�950�900�840�770

3�403�503�10316030903010�930

3�70333033303�903�1031�030�0



Material specification

No . Part Material DIN/EN ISO ASTM

� Gasket between body and flange

Non-metalNon-asbestos

3 Bolts for flange Stainless steel A�-70 A�-70 Type 308

4 Flange PM 5 - 65 Steel RSt . 37-�, 100�5 Fe360 B, 630 Grade C, A �83

6 Plug Steel 9SMn�81651

Type �R683/9

1�13SAE J 403

10 Valve spindle Steel 9SMn�81651

Type �R683/9

1�13SAE J 403

1� Valve seat Teflon [PTFE]

19 Valve body Low temperature cast iron (spherical)

EN-GJS-400-18-LTEN-1693

�0 Bottom cover Low temperature cast iron (spherical)

EN-GJS-400-18-LTEN-1693

�3 Spring Steel

�4 Servo piston Cast iron GG-�5 Grade �50 Class 40B

30 Cover Low temperature cast iron (spherical)

EN-GJS-400-18-LTEN-1693

31 Trottle cone Steel 9SMn�81651

Type �R683/9

1�13SAE J 403

3� Gasket between body and bottom cover

Non-metalNon-asbestos

34 Bolts for top and bottom cover

Stainless steel A�-70 A�-70 Type 308

41 Gasket Non-metalNon-asbestos

43 Spring Steel

53 Spindle cap Steel 9SMn�81651

Type �R683/9

1�13SAE J 403

60 Setting / manual operating spindle

Steel 9SMn�81651

Type �R683/9

1�13SAE J 403

73 Pilot connection Steel 9SMn�81651

Type �R683/9

1�13SAE J 403

Material specification for PMFL/PMFH valves

PMFL PMFH

1� RD�CB40� Danfoss A/S (RC-CMS/MWA), 10 - �004


Rated capacity in kW (1 kW = 0.284 TR)

The rated capacity is given at evaporating temperature te = +5°C, condensing temperature tc = +3�°C and liquid temperature tl = +�8°C .

Ordering

Main valve

The code nos . stated apply to main valves typePMFL or PMFH incl . flange gaskets, flange bolts,blanking plug and pilot connection with Ø6 .5 / Ø10 mm weld nipple (3/8 in . flare connection can be supplied, code no . 027F0115) .

Weak/Strong

Spring set Special spring set for PMFL

Special spring set for PMFH

Valve type R 717 R �� R 134a R 404A R 1� R 50�

PMFL/H 80-1PMFL/H 80-�PMFL/H 80-3PMFL/H 80-4PMFL/H 80-5PMFL/H 80-6PMFL/H 80-7PMFL/H 1�5PMFL/H �00PMFL/H 300PMFL/H 500

139�09348558835

1395�080348055808350

13900

�7 .841 .870

105174�78435700

10501740�780

�� .135 .353 .188 .9133��135355�889

1333��10

3349 .78� .71�4�07330569831

1�43�0683300

17 .4�7 .841 .870

105174�78435700

10501740

3045 .�75 .�113188300470755

113018803000

Valve typeCode no.

GG �5 EN GJS 400-18-LT

PMFL 80-1 027F0050 027F3054

PMFL 80-� 027F0051 027F3055

PMFL 80-3 027F0052 027F3056

PMFL 80-4 027F0053 027F3057

PMFL 80-5 027F0054 027F3058

PMFL 80-6 027F0055 027F3059

PMFL 80-7 027F0056 027F3060

PMFL 1�5 027F0057 027F3061

PMFL �00 027F0058 027F3062

PMFL 300 027F0059 027F3063

Valve typeCode no.

GG �5 EN GJS 400-18-LT

PMFH 80-� 027F0061 027F3065

PMFH 80-3 027F0062 027F3066

PMFH 80-4 027F0063 027F3067

PMFH 80-5 027F0064 027F3068

PMFH 80-6 027F0065 027F3069

PMFH 80-7 027F0066 027F3070

PMFH 1�5 027F0067 027F3071

PMFH �00 027F0068 027F3072

PMFH 300 027F0069 027F3073

PMFH 500 027F0070 027F3074

Subcooling ∆tu

K

Pressure drop ∆p in PMFL Pilot connection

on SVPos . Type PMFL

"WEAK" "STRONG"4 → 15 bar 1 .� → 4 bar

Spring set Code no.

0-8 "STANDARD" "WEAK" P �3 + 43 80-1 → 80-71�5�00300

027F0123 027F0124 027F0125 027F0126

027F0118 027F0119 027F0120 027F0121

8-40 "STRONG" S

Pressure drop in PMFH∆p bar

Type "WEAK"

Code no.

1 → 4

PMFH 80 .1 → 7PMFH 1�5PMFH �00PMFH 300PMFH 500

027F2190027F2191027F2192027F2193027F2194



Flanges 2)

Stainless steel: flanges, bolts for flanges and topand bottom covers, see spare parts catalogue .

Ordering(continued)

Pilot valves SV 1-3

Spare parts and accessoriesSmaller orifices for the SV 4 are availableas spare parts .− Seal kit: 027B2070

Special orifice code no. for SV 4

1) The code no . includes orifice and all necessary gaskets

Pilot valves SV 4

1) Flange for mounting without housing Code no . 0�7B�0�7 .�) Approved and CE-marked in accordance with Pressure Equipment Directive - 97/�3/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 .

Pilot valve kits (EVM and coil)Can be screwed on to the PMFL or PMFH insteadof the blanking plug .

Valve type Flange type Weld flanges Solder flanges

in . Code no. 1) in . Code no. 1) mm Code no. 1)

PMFL 80 /PMFH 80

1� 3/4

111/4

027N1220027N1225027N1230

7/8

11/8

027L1223027L1229

��8

027L1222027L1228

PMFL 1�5 /PMFH 1�5

�3 11/4

11/�

027N2332027N2340

13/8 027L2335 35 027L2335

PMFL �00 /PMFH �00

�4 11/�

�027N2440027N2450

15/8 027L2441 4� 027L2442

PMFL 300 /PMFH 300

�5 ��1/�

027N2550027N2565

�1/8 027L2554 54 027L2554

PMFH 500 �6 �1/�

3027N2665027N2680

�5/8 027L2666 76 027L2676

1) Code no . applies to one flange set consisting of one inlet and one outlet flange .�) Dimension sketch see spare part catalogue .

Type Connection Code no.

Float pilot valvetype SV

Balance tubeliquid / vapour

Pilot line SV 1:027B2021027B2021CE �)

SV 3:027B2023027B2023CE �)1 in .

weldØ 6 .5 / Ø 10 mm

weld 1)1) 3/8 in . flare connection can be supplied under code no . 027B2033 .�) Approved and CE-marked in accordance with Pressure Equipment Directive - 97/�3/EC .

Valve typeOrifice

diameterCode no.

Code no. without

housing1)

SV 4 Ø 3 .0 mm 027B2024 �) 027B2014 �)

Orifice diameter kv Code no .1)

Ø 1 .0 mm 0,0�6 027B2080

Ø 1 .5 mm 0,06 027B2081

Ø � .0 mm 0 .10 027B2082

Ø � .5 mm 0,16 027B2083

Ø � .8 mm 0 .�0 027B2084

Coils, 10 W a .c .

a .c .: 0�7B11��xx

where xx can be

d .c .: 0�7B11�4yy

where yy can be

�4 V, 50 Hz 16 0� (�4 V)

110 V, 60 Hz �1 09 (��0 V)

115 V, 50 Hz ��

��0 V, 50 Hz 31

��0 V, 50/60 Hz 3�

�40 V, 50 Hz 33



Optional accessories

Fundtion indicator

Ordering(continued)

Electronic position indicator, type AKS 45

AKS 45-26

a/flats 3�

Calibration/LED

AKS 45 is an electronic transmitter that provides astandard 4 - �0 mA output signal in accordancewith the opening degree of a PMFL/PMFH valve,and digital signals for fully open/closed valve .

AKS 45 is designed on the induction/eddy currentprinciple . This means that the measuring circuit isnot in physical contact with mineral oils and diverse refrigerants .

Accessories L L1 L� H H1 B B1

Electronic position indicator, type AKS 45

AKS 45 - �6mm �8 45 48 1� 78

NV 3� M �4 × 1 .5in . 1 .10 1 .77 1 .89 0 .47 3 .07

Electronic position indicator Code no.

Type AKS 45 - �6 084H4045

Description Code no.

Pressure gauge connectionØ 6 .5 / Ø 10 mm weld / solder

027B2035

Pressure gauge connection1/4 in . flare (self-closing)(Must not be used in ammonia plant)

027B2041

Pressure gauge connectionCutting ring connection

6 mm10 mm

027B2063027B2064

Pressure gauge connection 1/4 NPT 027B2062

Damping cylinder for PMFH 80 → 500 027F2195

Description Code no.

Function indicatorCan be fitted in place of the main valve bottom plug . When the protective cap of the indicator isremoved, the degree of opening of the PMFL-regulator can be observed in relation to the degree ofopening 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 .

027F0085

Manual operating unit for PMFL . Can be fitted in place of the regulator bottom plug 027F01283/8 in . flare pilot connection for PMFL and PMFH 027F01153/8 in . flare pilot connection for SV 027B2033



Dimensions and weights

PMFL/PMFH

Type

H1

mmH�

mmH3

mmH4

mmH5

mmL

mmL1

mm

L5 max .

B1

mmB�

mmB3

mm

Weight excl . solenoid valve

kg10 Wmm

�0 Wmm

PMFL PMFH

80 66 16� 79 113 176 177 106 130 140 75 87 7 .0

1�5 7� 178 96 1�8 193 �40 170 130 140 84 8� 94 11 .3

�00 79 187 105 138 �0� �54 170 130 140 94 89 10� 14 .�

300 95 �05 1�3 155 ��0 �88 �00 130 140 104 106 113 19 .8

PMFH 500 109 ��7 146 176 �4� 34� �50 130 140 1�7 113 135 �8 .3



Documents

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