Danfoss VCM 46 Manuale utente

The Service guide covers the instruction for

disassembling and assembling the VCM 46 Non-

return valve.

IMPORTANT:

It is essential that the VCM 46 is serviced in

conditions of absolute cleanliness.

WARNING:

Do not use silicone when assembling the VCM

46. Do not reuse disassembled O-rings; they

might be damaged.

Always use new O-rings.

For a better understanding of the VCM 46, please

see the sectional view.

Tools needed:

• Snap ring pliers or nylon mandrel

• Screwdriver

Disassembling

1. Mount the VCM 46 into a vice with

aluminum trays. 2. Turn the nut CCW with snap ring pliers.

Service guide

Non-return valve

VCM 46

Disassembling and Assembling

180R9420 | AX323840049566en-000101 | 1

© Danfoss | DCS (im) | 2019.11

3. Alternatively use a mandrel made of nylon. 4. Remove the nut.

5. Remove the spring. 6. Remove the valve cone.

7. Remove the O-ring at the cone with a small

screw driver. 2. Remove the O-ring at the thread end of the

valve with a small screw driver.

Service guide |Disassembling and Assembling VCM 46

© Danfoss | DCS (im) | 2019.11 180R9420 | AX323840049566en-000101 | 2

2. Mount the lubricated O-ring at the thread

end of the valve.

3. Mount the water lubricated O-ring on the

cone. Ensure the O-ring is pushed fully into

the O-ring groove.

4. Mount the the cone.

5. Mount the spring on the rod of the cone. 6. Lubricate the threads of the nut.

Assembling

1. Lubrication:

• To prevent seizing-up, lubricate threads

with PTFE lubrication type.

• O-ring inside VCM 46 may be lubricated

only with clean ltered water.

• O-rings at the thread end must be

lubricated.

• It is important to lubricate ALL parts to

be assembled with clean ltered water.

Service guide |Disassembling and Assembling VCM 46

© Danfoss | DCS (im) | 2019.11 180R9420 | AX323840049566en-000101 | 3

7. Screw in the nut. 8. Tighten the nut with a snap ring pliers.

9. Alternatively use a plasitc mandrel.

Service guide |Disassembling and Assembling VCM 46

© Danfoss | DCS (im) | 2019.11 180R9420 | AX323840049566en-000101 | 4

Spare part list and

sectional drawing

Pos. Qty. Designation Material Seal set

180H4000

4 1 O-ring 35.00 x 3.00 NBR x

6 1 O-ring 58.00 x 2.00 NBR x

Spare part list

Danfoss A/S

High Pressure Pumps

Nordborgvej 81

DK-6430 Nordborg

Denmark

© Danfoss | DCS (im) | 2019.11 180R9420 | AX323840049566en-000101 | 5

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