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

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ITT
Engineered Valves, LLC Page 15 of 24
Technical Manual No. IOT4400F Effective 8/31/2018
REV LEVEL B
Unscrew seal retainer screws (Item 80) and remove Seal (Item 78) and Retainer
(Item 79) from Inlet Valve Subassembly. There are retaining Loctite on the treads
of the screws.
Remove Inlet Valve Seat Ring Retaining Screw (Item 45); there are retaining
Loctite on the threads of the screws. Seat Ring Puller (P/N 49111) can be uses to
extract the Inlet Seat Ring. Insert puller behind the Seat Ring (Item 44) while the
longer bar on lower flange of Valve Body (Item 2), turn hex nut on stud to pull
the Inlet Seat Ring (Item 44) from Lower Body (Item 2).
Discard old Seat Ring Gasket (Item 46) and clean surfaces of sealant.
Remove the Outlet Valve Subassembly through the bottom of the valve body.
Remove the Outlet Valve Retaining Screw (Item 95) from Outlet Valve
Subassembly, there are retaining Loctite on the threads of the screws (Item 95).
Lift Outlet seal retainer (Item 94) and remove Seal (Item 93).
Remove Spring Bucket Subassembly by unscrewing Mounting Screws (Item 31),
there are retaining Loctite on the threads of the screws. Remove Spring Bucket
Gasket (Item 32) and clean the surfaces of sealant. Remove Vent Shaft Seals
(Item 30) from Spring Bucket Subassembly. Unthread the Spring Guide (Item 66)
from the Spring Bucket (Item 65) and remove the O-ring (Item 64). Caution
should be taken not to damage the bushings.
Remove the Outlet Seat Ring retaining screws (Item 37); there are retaining
Loctite on the threads of the screws. Seat Ring Puller (P/N 49111) can be uses to
extract the Outlet Seat Ring. Insert puller behind the Outlet Seat Ring (Item 36)
while the longer bar on the upper flange of Upper Body (Item 1), turn hex nut on
stud to pull the Outlet Seat Ring (Item 36) from Upper Body (Item 1) through the
top of the body.
Discard old Seat Ring Gasket (Item 38) and clean surfaces of sealant.
Discard all seals that were removed from valves.
B. Maintenance
Periodic leak testing of both block valves and verification of proper operation of
both proof of closure switches and open limit switch (when equipped) is
recommended per applicable codes. See Section VI for leak testing and Section
VII for switch setting techniques.