Pressure seal gate valves are used for high pressure service, typically for pressures above 100 bar. The unique feature of the pressure seal bonnet is that the body-bonnet joints seal improves as the internal pressure within the valve increases.
The main applications are: petrochemical industry, steam circuits, boiler circulation, oil and gas applications, power stations
Common used types of medium encountered are: steam, condensate, boiler feedwater
Typical pressure rating of the valve is 900, 1,500 and 2,500 pounds.
Our pressure seal gate valves are available as forged or cast valves featuring exotic material options with short delivery times.
Type of wedge
Design & testing
All available international standards according to API, EN, ISO
Reliable and with simple design principles, Red Point’s pressure seal bonnet (PSB) has proven its capability to handle increasingly demanding applications. PSB valve designs weigh significantly less compared to bolted bonnet designs (BB). BB design body flange and bonnet flange are joined by studs and a gasket inserted between the faces to seal. Studs are tightened to prescribed torques to affect optimal sealing. When a system pressure increases a potential leak through body/bonnet joint increases. Our pressure seal design is equipped with bonnet lift-up bolts (live-loading type) to pull the bonnet up and seal against the pressure seal gasket. This creates sealing between gasket and ID of the valve body, our segmented thrust ring maintains the load. When the system pressure builds-up, so does the load in the bonnet and pressure seal gasket. When system pressure increases, the potential for a leak through body/bonnet joint decreases. The minimum consistent operating pressure is in excess of 525 psi.
Hard Facing Disc
Wedge and seats are ground and lapped to a mirror finish and tightly guided to prevent dragging and seat damage
Body and bonnet joint accurately machined with high surface finish stem and packing chamber
Low emission valve technology optimized for extended service life
Low compression packing reduces friction and allows more room to re-torque in the field
Packing ring construction for excellent sealing and acts a corrosion inhibitor
Option: live loaded gland bolting
Lantern ring with double packing (upper & lower) for critical services
Red Point’s pressure seal bonnet gate valves can be deployed for a wide variety of applications in the oil & gas and petrochemical industries when high quality, reliable valves are required. A few example applications include:
High-cycle and switching services
Emergency shutdown valves
High-integrity pressure protection system
High-pressure oxygen, nitrogen, or hydrogen
Solids handling (powders, fines, dust, and catalysts)
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