Force
– Two Piece Trunnion
Mounted Ball Valve
Document Number:
Revision:
Release Date:
EDC 514
A
05/09/2022
IOM: Installation, Operation and Maintenance Manual
18/43
Ⅳ. Valve installation
3
Valve installation procedure
3.1
Pipes and valves should be accurately aligned.
3.2
The appropriate length should be kept between pipe flanges for the valve face-to-face
dimensions including the gasket thickness.
3.3
Place the valve between the pipe flanges. Insert bolts through the bottom bolt holes and
tighten them lightly. This will support the valve during the remaining steps of installation.
3.4
Insert gaskets between the valve and pipe flanges.
It is recommended to apply lubricant (gasket paste) to gasket faces.
3.5
Make sure the correct alignment of gaskets, which are held in place with the bottom bolts.
3.6
Thread bolts through the other holes of flanges and slightly tighten them.
3.7
Evenly tighten the bolts alternately in a star pattern as shown below. Once the bolting is
properly tightened, both ends of each bolt should evenly protrude beyond the nuts.
3.8
Gradually raise the line temperature and pressure during the test run. Retighten valve
bolting, if needed.
