
DeZURIK
November 2020
Page 21
D10322
Seat Replacement
Removing Valve From Pipeline
Pipeline pressure can cause personal injury or equipment damage. Relieve the
pressure in the pipeline before removing flange bolts and flanges.
1. Relieve pressure in the pipeline and drain the pipeline.
2. Close the valve.
Accidental operation of powered actuator can cause personal injury or equipment
damage. Disconnect and lock out power to actuator before servicing.
3. If the actuator is powered, disconnect and lock out the power to the actuator.
4. Support the valve, remove the flange bolts and remove the valve from the pipeline.
Note:
Lifting the valve incorrectly can damage it. Do not fasten lifting devices to the actuator or disc,
or through the seat opening in the body. Lift the valve with slings fastened around the valve body, or
attach them to bolts or rods run through holes for the pipeline flanges.
Replacing the Seat
1. Place the valve in a horizontal position, with the seat side up.
2. Refer to Figure 1 (page 6) for component identification.
3. Remove the seat retainer screws (A23), the seat retainer (A20) and all of the seat components.
Note:
The seat retainer on valve sizes 14" (350mm) and larger has two tapped holes. Screws may
be threaded into these holes to remove the seat retainer.
4. Clean the seat cavity in the body and the seat cavity in the seat retainer.
5. Close the valve.
6. Refer to the appropriate seat option:
Resilient Seat Options (TT, TI, RT and RI)
—see page 21
Metal Seat Option (S2)
—see page 22
Fyre-Block Seat Options (RTS2, TTS2, TIS2, and RIS2)
—see page 23
Intelli-Seal Seat Options
—see page 24