Most valves can be modified to use spiral-wound gaskets

Spiral-wound gaskets improve sealing over conventional soft iron

Stop face outside the stud circle can be machined without removing the studs

Modification shown is done to Westinghouse BB44 steam chest

Stop face outside the stud circle ensures bonnet can't go in tipped

Not removing the studs saves time and money

Split frame pipe machine mounted on a special fixture.

Fixture locates and aligns off the bores and faces already machined inside the stud circle.

Face machined on Throttle Valve body

Modification of Throttle Valve for Spiral Wound Gasket

Project Highlights