Detailed Product Description

On valves equipped with thermal relief systems,the throat needle valve must be left open during normal use. The relief valve is set to open at 25 psi differential pressure on standard valve,regardless of their working pressure,With the valve closed,the relief valve will open at 25 psi above upstream pressure.Standard thermal relief systems are also provided with a manual body bleed valve to check valve seal integrity.
The Twin Seal Valve is a non-Iubricated, resilient seal,plug-type valve which
has a mechanical means of freeing the plug before it is rotated from the closed to the open position,In opening the valve, the plug is raised,thus retracting the seating segments or slips through their tapered dovetail connections.Only after the slips afe
fully retracted perpendicularly from the body seat is the plug rotated to the open position.