Pressure Seal Swing Check Valve Description
Pressure-sealed swing check valve is a valve that achieves one-way shutoff by rotating the valve disc around the axis. Its core feature is the use of a pressure-tightening sealing structure (such as a metal gasket or elastic sealing ring) to enhance the sealing performance under high-pressure conditions through medium pressure to effectively prevent leakage. It is suitable for high-pressure pipeline systems such as petroleum and chemical industries to prevent medium backflow and reduce water hammer effects.
Valve body and sealing components
Valve body material: Carbon steel (WCB), stainless steel (316/304) or duplex steel (2205), suitable for high pressure (≤PN420) and corrosive media.
Self-tightening sealing structure: Metal spiral wound gasket or O-ring is used between the valve cover and the valve body. When the medium pressure increases, the sealing surface pressure is enhanced to achieve zero leakage (leakage rate ≤0.01%).
Valve flap and drive design
Swing valve flap: The disc-shaped valve flap rotates around the rotating axis, and the streamlined channel reduces the flow resistance (30%~50% lower than the lifting type), which is suitable for large-diameter (DN50~DN1200) low flow rate scenarios.
Buffer mechanism: Some models have built-in damping springs or hydraulic buffers to reduce the impact of valve flap closing and avoid pipeline vibration.
Pressure Seal Swing Check Valve Specification
Size：2"~24"(DN50mm-DN600mm)
Pressure：ANSI 600LB~3500LB(PN100~PN420)
Medium：water gas oil air ect
Temperature：-29℃-550℃
Body：A105,Alloy steel,CF8
Connection method: threaded , butt welding,flange
Manufacturing standards: API 6D, GB/T12235-2007
Inspection standards: API 698, GB/T12224-2015
Length standards: ASME B 16.10, GB/T12221-2005
Flange standards: JB/T74-94, GB/T9113-2010
Pressure rating: ASME B 16.34, GB/T12224-2015
Flange standards: ASME B16.5, ASME B16.47 A, API 605
Pressure Seal Swing Check Valve
Advantages
Reliable high-pressure sealing: The self-tightening sealing design has better sealing performance under high pressure (≥PN160), avoiding the bolt loosening problem of traditional flange sealing.
Low flow resistance and long life: The streamlined valve body reduces pressure loss (≤0.05MPa), and the wear-resistant alloy sealing surface (such as Stellite alloy) has a life of up to 100,000 openings and closings.
Flexible installation: Supports horizontal, vertical or inclined pipeline installation. When installed vertically, the medium flow direction must be from bottom to top.
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