ITT Skotch Trifecta T4405F, Инструкции по установке, эксплуатации и обслуживанию

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ITT
Engineered Valves, LLC Page 12 of 24
Technical Manual No. IOT4400F Effective 8/31/2018
REV LEVEL B
Item numbers refer to drawings, 117923 and 117924.
WARNING
Verify the T4400F gas valve is in CLOSED position. Ensure
all manual isolation valves are closed and tagged out, all
electrical circuits are de-energized and that the pneumatic
supply and valve are isolated and depressurized before
performing any work on the valves.
IMPORTANT : Special tools are needed for disassembly and assembly. They should be
procured before work begins.
Special tools include:
ITT P/N: 49088, Spring Compressor T4300F/T4400F. Uses to compress the outlet
return spring during disassembly and assembly.
ITT P/N: 49111, Tool Seat Ring Puller T4400F. Use to remove seat rings from
valve body.
A. Disassembly
WARNING
Individual valve components can be very heavy and difficult
to remove. Use proper caution.
A clean dry area should be provided for valve disassembly. Before disassembling
the valves, the location of the junction box, vent and flange subassemblies should
be marked to facilitate ease of reassembly. Commence system disassembly by
removing accessories such as switch covers, solenoids, switches and junction
boxes from mounting surfaces on the top and bottom of the valve. Uncouple the
vent connection piping.