Pressure Sealed Cast Steel Gate valves are intended for high pressure, high temperature applications in all types of fluid except where severe coking is a factor. The design and material selections provide excellent service in steam-generation stations, industrial chemical plants and thermal power plants. Most Pressure Sealed Gate Valves are offered in Cast Steel and Forged Steel body designs. These options make the ZGV Pressure Seal product line an excellent choice for users with various application requirements.

The flexible wedge is a one-piece, fully guided cast wedge with a central hub to allow the seating faces to move relative to each other, thus compensating for distortion of the body seats due to thermal expansion or piping loads. Seat ring and wedge seating face are set at a 9° angle from vertical to minimize sliding contact of the wedge and seat ring during opening and closing. Wedging actions help effect a tight seal in low differential pressure services. Flexible wedge construction resists wedge sticking or binding in services where the valve may be closed when cold and opened when hot. Seating surfaces are hardfaced with Stellite to provide high cycle capability in very high differential pressure services.

Pressure Sealed Gate Valves provide the most efficient flow passage and sealing features possible, resulting in significant weight savings, easy installation and in-line maintenance.
Pressure Seal Valves are manufactured and tested in strict accordance with the following standards:
▲ASME B16.34 ▲ASME B16.10 ▲ASME B16.25 ▲API 598

AVAILABLE MODIFICATIONS FOR ZGV PRESSURE SEAL GATE VALVES
Gear Operator Mounting ▲ Trim Changes ▲ Actuation ▲ Cryogenic Gas Columns
Hand Wheel Extensions ▲ Drilled & Tapped Body/Bonnet Connections ▲ By-Pass
Pressure Equalizing ▲ Acid Shields ▲ Oxygen & Chlorine Cleaning & Packaging
Weld End Bore Changes ▲ Customer Specified Coatings ▲ Chain Wheel Operator