The Pressure Seal Bonnet:

Another very effective type of Bonnet construction, apart from the standard Bolted Bonnet type in a gate/Globe valve is the Pressure Seal Bonnet. This construction is adopted for valves for high to very high pressure service. The unique feature about the pressure seal bonnet is that the Body – Bonnet joints seal improves as the internal pressure in the valve increases, compared to other constructions where the increase in internal pressure tends to create leaks in the body-bonnet joint.

Application Industries: 

Power Stations, Thermal & Cogeneration Power Plants, Nuclear Power Plants, Petrochemical ,Chemical, Process and other General Industries, Sugar, Refineries , Fertilizers, Steel, Off-Shore &On-Shore Platforms.

Media of applications include: Water, Steam [Saturated / Superheated] Oil and Gas, Hydrocarbons, NACE and Sour Services, LNG & Natural Gas, Oxygen and Hydrogen Services and many other Aggressive and Non Aggressive applications.

  • RANGE :UKL High Pressure Gate and Globe Valves Sizes: 15mm [0.5] to 250mm[10]
  • END CONNECTIONS: 15mm to 40mm – Forged Steel, Welded Bonnet, SW / BW Ends 50mm to 250mm Cast Alloy Steels – straight type BWE
  • As per ASME B16.34: Pressure Classes 1500 and 2500.
  • Materials. ( as per ASME B-16.34 ) # 1500 , # 2500 in A-216 WCB for temperature 0o C to 425deg. C # 1500 , # 2500 in A-217 WC-6 / WC-9 for temperature 00 C to 593deg. C Other material on request

FEATURES:

  • Pressure Seal Bonnet Design.
  • Stellite Hard faced Seat and Disc
  • Direct Retro-fitted Actuator / Gear Box arrangement as applicable
  • Graphite Seal rings and Packings.

All valves up to 40mm are Outside Screw and Yoke, Welded Bonnet type, rising stem renewable seat, for Gate valves. Globe valves will have Integral seat.

All valves 50mm and above are Outside screw and Yoke, Rising Stem and with Pressure Seal Bonnet.

Gate Valves shall be with Flexible wedge type Gate. Globe Valves shall have Conical type Disc.