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MAINTENANCE INSTRUCTIONS
Disassembly of valve to change internal components or gaskets.
Note that this service must be done while the valve is not under pressure.
1.
To make the service easier, the valve should be fully open before starting.
2.
Remove the handwheel or any other operating device present.
3.
Loosen the screws in the head of the valve.
4.
Carefully remove the head from the valve. Be careful not to damage the seals in the head when removing the
head.
5.
Unscrew the spindle from the spindle nut (only applicable to SVM-TG & RVM-TG)
6.
If the gasket must be changed a thin piece of plastic has to be inserted into valve between the gate and the
gasket, before removing the gate. Otherwise reinserting the gate is impossible without damaging the gate. Gasket
chance is only possible on sizes DN400/NPS16 and up, and not on valves with double seals (RVM-TG).
14
SVM-TG and RVM-TG
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