Oswal Industries Ltd. Manufactures Flanged End Pressure Seal Gate Valve. Oswal Industries Ltd. Has achieved ISO 9001:2000 certifications. Flanged End Pressure Seal Gate Valve is normally used for on-off service. Flanged End Pressure Seal Gate Valve is used for high pressure high temperature applications where body / bonnet flanges are eliminated by the reliable pressure seal. The internal pressure applied to the pressure seal valve forces the sealing element in the tighter contact and results in pressure assisting sealing. The higher the internal pressure, tighter the seal. The efficient sealing feature provides significant weight savings, ease of installation and maintenance. These valves are not recommended for throttling service.