Swivel ball valve

The rotary ball valve is designed to seal effectively under both forward and reverse pressure conditions, even when reverse pressure exceeds forward pressure. When forward pressure is applied, the medium pressure pushes the valve plate forward, with the sealing surface of the valve plate tightly pressing against the sealing surface of the valve seat to transfer pressure, pushing the valve seat against the step of the valve body for a good seal. When reverse pressure is applied, the medium pressure pushes the valve plate backward, while simultaneously pushing the valve seat backward. The sealing surface of the valve seat then tightly presses against the sealing surface of the valve plate to transfer pressure, ensuring a good seal.

Structural Features

1. Utilizes an inclined elliptical butterfly blade radial dynamic balance sealing system, with the valve inlet and outlet sides experiencing approximately balanced forces, resulting in a smaller torque for valve operation and reliable bidirectional sealing performance, capable of withstanding bidirectional pressure.

2. The valve sealing surface features a solid metal sealing ring, precision machined. The sealing cross-section is elliptical, forming a sealing pair with the valve seat metal sealing surface. During the opening and closing of the valve, the butterfly plate sealing surface makes instantaneous contact or disengagement at each point along the 360° circumference, enabling a rapid and precise opening or closing action.

3. Utilizes a three-eccentric structure, which is an addition of an angular eccentric on the basis of a double eccentric butterfly valve.

Execution Standards

Design Specifications: GB/T 12238, JB/T 8527

Flange Connections: GB/T 9113, JB/T 79, HG20592

Structure Length: GB/T12221

Testing and Inspection: GB/T13927

Performance Parameters

Product Specifications: DN50~2230mm

Pressure Class: PN 1.0~2.5 MPa

Applicable Media: Air, water, steam, gas, oil, and weakly corrosive media such as acids, alkalis, and salts

Temperature Range: Carbon Steel: -29℃ ~ 425℃; Stainless Steel: -40℃ ~ 600℃

Drive Method: Worm Gear Drive, Pneumatic Drive, Electric Drive, Hydraulic Drive

Main Materials: Cast Steel, Stainless Steel, Chromium Molybdenum Steel, Alloy Steel, Duplex Steel

Product Dimensions