DMN-WESTINGHOUSE AL-BL Rotary Valves
Code: AL-E.B.01.B 11-2012
12
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.
DMN-WESTINGHOUSE valves have been manufactured with great care. To reduce
air leakage’s, internal running clearances are kept extremely small during manufacture
and assembly of the valve.
- do not use heavy or rough tools;
- avoid damages like scratches and burrs;
- clean all parts thoroughly.
In case of repair work to the valve, please follow safety instructions
of chapter 1.
- Turn off the electrical supply, lock the switch and/or remove the fuses;
- If necessary, disengage the chain to ensure that the rotor does not turn.
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