Trunnion mounted ball valve has been designed with two floating seats, which are movable under the pressure of medium. Under the bottom of seats, seat loading springs are positioned to ensure two floating seats can attach the ball’s surface tightly, othermore, pressure of medium also can push seats to attach ball tightly to ensure sealing more reliable.
The fixed ball valve is equipped with a movable valve seat seal ring which can generate displacement under the pressure of medium. The seal ring is always pressed onto the ball under the preti ghtening force of the preloaded spring equipped at the bottom of the valve seat seal ring. In case that any medium pressure exists, the pressure will press the valve seat seal ring onto the ball tightly, guaranteeing the sealing performance of the ball valve.
Technical Specifications
Design standard: ISO14313 、API 6D、BS 5351、GB/T 19672
Face to face standard: ASME B16.10、GB/T 12221
Flange ends: ASME B16.5、ASME B16.47 GB/T 9113
Fire safe design:API 6FA、API 607
Pressure test:API 6D、API 598、GB/T 13927
Product Specifications
Body material: carbon steel, stainless steel, alloy steel
Nominal diameter:2"～60"（DN50~DN1500）
Pressure range: Class150～2500（PN16~PN420）
Working temperature:-196℃～+200℃
Operation:Wrench, worm gear, electric , pneumatic , gas over oil actuator and electro-hydraulic actuato
Design Features
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Application
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Simple structure with good sealing performance and small torque;
Full bore and reduced bore design with the minimum flow resistance (zero actually);
Fire safe, anti-static and anti-blowout stem design;
Valve seat function DBB, DIB-1, DIB-2;
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power station, urban construction water supply, as well as oil, gas and natural gas transmission and so on
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