DMN-WESTINGHOUSE Explosion-Proof Rotary Valves
Code: RV-Ex.pro-E.B.01.D 05-2016
13
Before installing the rotary valve in the system check the
clearances between rotor and Body/Cover. (See 5.1)
When installing the valve make sure it is not unevenly loaded by
external forces or subject to vibrations.
Rotary valve external no zone.
It is not allowed to have explosive atmosphere out side.
No dust layers are allowed.
Pay specific attention to the shaft seal and the shaft seal area
- Gland seals
In case of gland seals by means of gland packing it is necessary before starting the
system to fasten the gland in order to set the gland packing in such a way that it seals
and the rotor will be able to run.
After running in tighten gland follower to ensure sealing.
- Shaft sealing with air purge.
When using an air purge gland oil-free dry air must be used. The diameter of the air
pipe supply should be equal to or larger than the connection on the valve. The pressure
of this purging air should be 0.5 bar higher than the pressure in the valve. The air
pressure must be applied before product enters the valve and before conveying
pressures are applied.
The air supply must always be present when there is product in the valve, and
especially after conveying ceases.
After running in tighten gland follower to ensure sealing.
Check adjustment and functioning purge air, if necessary re-adjust.
For more information about adjustment and replacement instructions
for shaft sealing see Standard operation instructions. (Appendix)
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