Product Introduction
Pressure Seal Check Valves are ideal for high-pressure steam, liquid, catalytic reformers, hydrocrackers, and other tough services. In the tough world of High pressure, High-temperature valve application. The basic concept of pressure seal valves is that the initial cover pulls up bolts tighten the cover which in turns seals the pressure seal gasket to the body. Then the system pressure assists for more force to seal the gasket. Hence, as system pressure increases, the potential for leakage through the body/bonnet joint decreases.

Technical Specification
Design Standard: API, ASME, EN, ISO, JIS, DIN, BS, GB
Size Range: NPS1/2’’-42’’ (DN15-DN1200)
Pressure Rating: 150-1500LB, 1.0-25.0Mpa, JIS10-100K
End Connection: Flange, SW, NPT, BW, Wafer, Lug type

Features
Lift type/Swing type/Dual plate
Full bore/Reduce bore
Bolted bonnet
Renewable seat/Integral seat
Plug type disc/Flat type disc

Picture Show 


Other available options as follows
-NACE service
-Special Cleaning for Oxygen Service
-Fugitive emission design

Technical Features
1.Cast body precisely machined with integral flanges.
2.Forged bonnet.
3.Precisely machined swivel disc as standard which provides superior tightness.
4.No penetration of hinge pin to outside eliminating possibility of pin seal leakage and allowing for in-line service.
5.Easy in-line service. All parts are easily accessible for maintenance. Seating faces can be re-lapped.
6.Hinge is pivoted to the hinge pin inside the body.
7.Disc nut secures the disc to the hinge. It allows the disc to rotate about its axis and assist in tight shut off.
8.Longer Seat rings are designed for higher temperature and higher pressure.
9.Compact cage unit: all moving parts are attached to the carrier and can be removed easily for service.
10.Offers graphite pressure seal gaskets as standard, instead of soft iron gaskets, providing a more flexible seal for applications with fluctuation conditions.