Sentry Saf-T-Vise STV-LP1 Installation, Operation & Maintenance Manual page 15

Seal Leaks
Saf-T-Vise STV-LP1 Seal Replacement:
1. Remove the hex plug using the stub hex socket . (The bleed valve may need to be loosened to allow the stub socket
to reach the hex plug .)
2. Insert the threaded end of the tube or rod into the top of the LP1 body to push out the old seal and backing ring .
The threaded end grips the old seal and backing ring in order to push them out of the LP1 body ID pocket .
3. Install a new seal using the seal insertion hand tool .
a. Place the seal and backing ring on the seal insertion hand tool as shown in the image .
b. Use the stub hex socket and a 6-inch extension to start the hex plug hand tight into the LP1 body .
 NOTE
Using a standard hex tool will damage the seal .
4. Torque the ID hex plug to 35 ft-lb to complete seal installation .
Teflon Seal:
If the holder is leaking from the top of the holder body where the rod/shaft and body meet, the Teflon seal is damaged
and requires replacement . See section on Seal Replacement .
Graphoil Seal:
If the holder is leaking from the top of the holder body where the rod/shaft and body meet, the graphoil seal is most
likely loose .
1. Adjust the top body to tighten the seal .
a. Loosen the set screw on the upper body . The set screw typically has a hex head .
b. Using an adjustable wrench on the top body wrench flats, turn the upper body clockwise in 1/4-turn increments
until the leak stops .
c. Turn the upper body an additional 1/4 turn clockwise .
d. Re-tighten the set screw on the upper body to prevent the body from loosening .
2. If leak persists, the graphoil seal is damaged and requires replacement . See section on Seal Replacement .
Connection Leaks
1. If the holder leaks from any threaded portion, immediately isolate the holder from the line and remove process
pressure .
2. Remove the holder from the isolation valve .
3. Follow the procedure for Prepping a Holder for Reinstallation .
– This procedure can be used for all connection points on a holder including the fluid inlet assembly, probe shaft
adapters, bleeder valves, and any other connections that may be on the holder .
Saf-T-Vise STV-LP1 & Saf-T-Vise STV-LP2 15