TYPE 3500 INSTALLATION, OPERATION & MAINTENANCE MANUAL
6. USE OF THE ANGLE SEAT VALVE
1. Make sure the air is clean and dry.
2. Check the regulator for correct air pressure and correction (3-8 Bar).
3. Check the environmental temperature (-10°C to 80°C)
4. Check the uid temperature (PTFE:-20°C to 180°C)
5. Verify on/o positions in the valve.
7. WELD END VALVES
While welding the valves with the pipeline, ensure absolute cleanliness as dirt can
enter the body and damage the sealing of the stem guide and seats.
Dismantle the top of the valve before welding.
10. OPERATION
Before putting new valve into service, check the size, ends, material and pressure
temperature limitation of the valve with the operating parameters for capacity and
compatibility.
11. MAINTENANCE
Parts of the valves are generally maintenance free. The materials of the sliding parts
have been selected to keep wear to a minimum. However, for reasons of safety and to
reduce maintenance and repair costs, all valves, especially those which are operated
occasionally shuld be inspected at least two times a year.
12. DISMANTLING
If the valves do not seal tight, it indicates that the seat is damaged and the valve
must be dismantled.
Before removing the complete valve from the pipeline or prior to repair of the valve in
the pipeline itself, the entire valve must be depressurized and suciently cooled down
so that the temperature is below the evaporation temperature of the ow medium
(in stung box too) and scalding prevented.
The seating surfaces and gasket should then be examined. If damaged please change
the valve or seat.
