i.PM380-125.07.05.en

8/10/2019 i.PM380-125.07.05.en

1/8

RI4XQ102 Danfoss A/S (RC-CMS), 02-2004 1

Fig. 4

Instructions PM3 (80-125)

027R9526

027R9526

Pos.item

Tightening Torque in Nm

80 100 125

a 50

b 65

c 25

d 140

e 80 80 125

f 105 135 200

g 75 80 125

i 9

k 25 40 60

l 45 60 90

m 150 220 310

Nm kpm lbf-ft

10 1 7.4

Installation

Table 1

Fig. 1

Fig. 3

Fig. 2

8/10/2019 i.PM380-125.07.05.en

2/8

2 RI4XQ102 Danfoss A/S (RC-CMS), 02-2004

Fig. 5

Fig. 6

Fig. 7

Fig. 8

8/10/2019 i.PM380-125.07.05.en

3/8


Installation

RefrigerantsApplicable to all common non-ammablerefrigerants, including R717 and non-corrosive gases/liquids dependent onsealing material compatibility.Flammable hydrocarbons are notrecommended. The valve is only

recommended for use in closed circuits. Forfurther information please contact Danfoss.

Temperature rangePM: 60/+120C (76/+248F)

Pressure rangePM: The valves are designed for a max.working pressure of 28 bar g (406 psi g).

Technical dataThe PM 3 can be used in suction, liquid,hot-gas and liquid/vapour lines.The PM 3 regulates the ow of themedium by modulation or on/o function,

depending on the control impulse from thescrewed-on pilot valves.The PM 3 has three connections for pilotvalves: two in series, marked S I and S II,and one in parallel with these two, markedP, see gs. 2 and 3.

Schematic examples of pilot valvesconnected to the PM can be seen in gures5, 6, 7, and 8.

If only two pilot valves are necessaryfor the function required, the third pilotconnection must be sealed with a blankingplug (see g. 5). A blanking plug is suppliedwith the valve.

Regulating rangeDependent on pilot valves.

Opening diferential pressure (p)The PM main valve requires a minimumopening dierential pressure of 0.07 bar(1 psi) to begin to open and 0.2 bar (2.8 psi)to be completely open.Note: The valve opens when dierentialpressure against the direction of owoccurs.

InstallationFlange set for the PM is deliveredseparately. The valve must be installedwith the arrow in the direction of the owand the top cover upwards (g. 4). The topcover can be rotated 4 90 in relation tothe valve body.The valve is tted with a spindle for manualopening.If an external pilot valve is used, the pilotline must be connected to the upper sideof the main line so that any dirt and oilfrom the plant will not nd its way into thepilot line.If the PM 3 is to be used as a solenoid valve

in a liquid line, external control pressurecannot be recommended because it cancause liquid hammer.

The valve is designed to withstand a highinternal pressure. However, the pipingsystem should be designed to avoid liquidtraps and reduce the risk of hydraulicpressure caused by thermal expansion. Itmust be ensured that the valve is protectedfrom pressure transients like liquidhammer in the system.

WeldingIf using welding anges, only materialsand welding methods, compatible with

the ange material must be welded to theanges. The anges should be cleanedinternally to remove welding debris oncompletion of welding and before thevalve is inserted.

The valve housing and anges must befree from stresses (external loads) afterinstallation.

PM valves must not be mounted in systemswhere the outlet side of the valve is opento atmosphere. The outlet side of the valvemust always be connected to the systemor properly capped o, for example with a

welded-on end plate.

Colours and identicationThe PM valves are Zinc-Chromated in thefactory. If further corrosion protection isrequired, the valves can be painted.Precise identication of the valve is madevia the ID plate on the top cover.The external surface of the valve housingmust be prevented against corrosionwith a suitable protective coating afterinstallation and assembly.

Protection of the ID plate when repaintingthe valve is recommended.

Maintenance

ServiceThe PM valves are easy to dismantle andmost of its parts are replaceable. When thebottom cover is removed, the strainer canbe taken out for cleaning.Do not open the valve while the valve isstill under pressure.

- Check that the gasket has not beendamaged. Ideally, the gasket should bereplaced.

- Check that the spindle is free of scratchesand impact marks.

- If the teon ring has been damaged, theparts must be replaced.

AssemblyRemove any dirt from the body before thevalve is assembled. Check that all channelsin the valve are not blocked with particlesor similar.

TighteningTightening torquesSee g. 1 and table 1.

Use only original Danfoss parts, includingpacking glands, O-rings and gaskets forreplacement. Materials of new parts arecertied for the relevant refrigerant.

In cases of doubt, please contact Danfoss.Danfoss accepts no responsibility forerrors and omissions. Danfoss IndustrialRefrigeration reserves the right to makechanges to products and specicationswithout prior notice.

ENGLISH

8/10/2019 i.PM380-125.07.05.en

4/8


8/10/2019 i.PM380-125.07.05.en

5/8


8/10/2019 i.PM380-125.07.05.en

6/8


8/10/2019 i.PM380-125.07.05.en

7/8


Name and Address of Manufacturer within the European CommunityDanfoss Industrial Refrigeration A/SStormosevej 10PO Box 60DK-8361 HasselagerDenmark

DeclarationWe hereby declare that below-mentioned equipment are classied for Fluid Group I (all refrigerants (toxic, non-toxic, ammable andnon-ammable)), and that all are covered by Article 3, paragraph 3.

For further details / restrictions see Installation InstructionDescription of Pressure EquipmentRefrigerant main regulating valvesType PM, PMC, PMFH, PMFL, MRV, MEV

Nominal bore DN 25 mm.(1 in)

DECLARATION OF CONFORMITYThe Pressure Equipment Directive 97/23/EC

References of other Technical Standards and Specications usedprEN 12284 DIN 3158EN 1563 AD-Merkbltter

Authorised Person for the Manufacturer within the European Community

Name: Morten Steen Hansen Title: Production Manager

Signature: Date: 19/03/2002

148B9715 - rev. 1

8/10/2019 i.PM380-125.07.05.en

8/8


Name and Address of Manufacturer within the European CommunityDanfoss Industrial Refrigeration A/SStormosevej 10PO Box 60DK-8361 HasselagerDenmark

Description of Pressure EquipmentRefrigerant main regulating valvesType PM, PML, PMLX, PMFH, PMFL, MRV, MEV

Conformity and Assessment Procedure Followed

Nominal bore DN 32-150 mm(11/4 - 6 in.)

Classied for Fluid Group I (all refrigerants (toxic, nontoxic, ammable and nonammable)).For further details / restrictions see Installation Instruction.

Temperature range

All

60C (76F) to 120C (248F)

Maximum allowableworking pressure

28 bar(406 psi)

Name and Address of the Notied Body which carried out the InspectionTV-Nord e.V.

Grosse Bahnstrasse 3122525 Hamburg, Germany (0045)

Name and Address of the Notied Body monitoring the Manufacturer's Quality Assurance SystemTV-Nord e.V.Grosse Bahnstrasse 3122525 Hamburg, Germany

References of Harmonised Standards used

References of other Technical Standards and Specications usedprEN 12284 DIN 3158EN 1563 AD-Merkbltter

DECLARATION OF CONFORMITYThe Pressure Equipment Directive 97/23/EC

Authorised Person for the Manufacturer within the European Community

Name: Morten Steen Hansen Title: Production Manager

Signature: Date: 19/03/2002

148B9704 - rev. 1

Category II III

Module D1 B1+D

Certicate IDD1: 07 202 0511 Z 0009/1/H-0002

B1: 07 202 0511 Z 0074/1/H-0001D: 07 202 0511 Z 0009/1/H-0001

Nominalbore

DN 32-125 mm (11/4 - 5 in) DN 150 mm (6 in)

Documents

i.PM380-125.07.05.en