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Type HB Gate Valve
Type HB Gate Valve
Gate Valves

National Oilwell Varco's Shaffer gate valves provide a wide range of choices in application style, trim, working pressure, and bore sizes. Three basic models of Shaffer gate valves are offered- Type B, Type DB, and Type HB.

Related Information

Type HB hydraulic valves are widely used in subsea BOP stack applications which require remotely operated choke and kill line valves adjacent to the blowout preventers.

Features:

  • Elastomeric seal between gate and seat assures long, trouble-free life in oil, water or gas applications. Gate and seats are hardened and precision ground.
  • Body cavities are filled with grease to resist accumulation of foreign materials and hydrates in the body. Water, mud or the line fluid which accumulates in the body cavity can be displaced by removing the bleeder plug near the bottom and pumping grease through the bonnet.
  • Zero standoff between bonnet and body prevents corrosion of bonnet bolt threads.
  • Servicing in the field is easy. No special tools are required, and all parts are completely interchangeable.
  • Reduced-hardness bonnet bolts can be used without de-rating the working pressure, which makes the valve especially attractive for H2S service.
  • All valve models are available with H2S trim which meets API 6A and NACE specifications.