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Parallel slide gate valves are designed with positional seal, using the line pressure as a sealing force. The compressed spring between the two closure members provides an initial seal during low pressure conditions. The increasing line pressure will push the closure members with higer forces aginst each other which creates the primary seal. The higher the medium pressure, the better the sealing performance. Therefore this valve type is widely used in high pressure and high temperature services such as steam and feedwater.
Pressure Seal Parallel Slide Gate Valves are specialized valves designed for high-pressure and high-temperature applications, typically used in power plants, refineries, and other industrial systems that handle steam, water, or other pressurized fluids. These valves feature a pressure-seal bonnet, which becomes more effective as the internal pressure increases, ensuring a tight, leak-proof seal. Unlike traditional gate valves, the parallel slide design eliminates the wedge action, allowing the gates (discs) to slide parallel to each other, which reduces the chances of the valve sticking or jamming under high-pressure conditions.
Size: NPS 2"~88"(DN50~DN2200)
Pressure Class:300~4500(PN25~PN760)
Body material：Carbon steel, Alloy steel, Duplex stainless steel
End connection：RF, BW, RTJ
Operation：Manual, Pneumatic, Electric,Hydraulic
Parallel slide gate valves are designed with positional seal, using the line pressure as a sealing force. The compressed spring between the two closure members provides an initial seal during low pressure conditions. The increasing line pressure will push the closure members with higer forces aginst each other which creates the primary seal. The higher the medium pressure, the better the sealing performance. Therefore this valve type is widely used in high pressure and high temperature services such as steam and feedwater.
Features and benefits：
1,Innovative pressure seal design to ASME B16.34.
2,Body – superior strength forgings / high quality castings.
3,Live-loaded bonnet bolting stores the required sealing load during a pressure or temperature induced transient which cause bonnet movement.
4,Unique parallel slide forged cage unit design comprises all operating parts of the slide discs and is precision guided to provide longer disc, seat, and body life.
5,Hardfaced seating faces resist erosion.
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