• HOPKINSONS® GATE VALVES FLEXI WEDGE DESIGN

HOPKINSONS®

Gate Valves Flexi Wedge Design

We recommend the highly versatile Hopkinsons® Flexi Wedge design as gate valve which is designed for containment isolation duties.

The outstanding feature of the parallel slide design is that of maintaining fluid-tightness without the aid of wedging action. No mechanical stress is exerted between the discs, and there are no problems associated with cool-down of the fluid.

VENTURI DESIGN

  • The Venturi design is used when a slightly higher pressure drop is acceptable. The well established principle of fluid flow through a Venturi is used in order to minimize pressure drop.
  • Venturi valves incorporate the design feature of an eye follower. In the fully open position the eye follower bridges the gap between the seats thus giving a smooth flow path and completing the Venturi profile.

APPLICATIONS

  • General purpose stop valve
  • Main steam and feedwater isolation
  • Boiler circulating pump isolation
  • The basic design is also incorporated in valves for other duties such as: Feedwater heater protection; Feed pump leak-off; Nuclear Applications (ASME Section III, Class 1, 2 & 3); Oil & Gas applications upstream, midstream, and downstream

MATERIALS

  • Carbon Steel
  • Alloy Steel
  • Stainless Steel
  • Bronze

KEY FEATURES & BENEFITS

  • Position indication
  • Bonnet overpressure protection
  • Seal weld (bolted bonnet)
  • Canopy seal (pressure seal)
  • Integral bypass arrangements & option
  • Instrumented stem
  • Gate valves – Flexi wedge design
  • Designed for containment isolation duties

DESIGN STANDARDS

  • ASME B16.34
  • Alternatively, valves can be supplied to other national standards, ASME section IIIRCC-M

DESIGN RATINGS

  • ASME Class 150 to 2500

TEMPERATURE RANGE

  • 29°C – 620°C (-20°F – 1150°F)

PRESSURE CLASS & POWER RATING

  • 80 – 600 mm (3 – 24 inches)

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