Extended Bonnet Gate Valve Design Standards

Type of wedge Flexible, solid
Construction Bolted, welded, extended
End connections Flanged, BW, SW, THR, HUB, PE
Operated Handwheel, gear, bare stem, actuator
Options Extended bonnet, bellow sealed, Heating Jacket, DBB configuration
Bellow seal materials 304 - 321 - 316Ti - Alloy 625 - C276
Design & testing All available international standards according to API - EN - ISO
Thoroughly degreased and cleaned for O2 services (oxygen)

Size and pressure ranges

  • Size and bore:
    - ANSI 1/2” - 12”
    - DN 10 - DN 300
  • Pressure range:
    - ANSI 125 lbs - 4500 lbs
    - DIN PN 10 - PN 400
  • Temperature range:
    - minus 196 ºC up to 816 ºC
    - minus 320 °F up to 1,500 °F

Extended Bonnet and Hard Facing Disc

Extended Bonnet

The Red Point gate valves can be supplied with extended bonnets for high or low temperature applications like cryogenic services. The extended bonnet allows the valve to be wrapped with insulation without interfering with the handwheel. By increasing the bonnet length the stem seal will be further away from the flowing fluid, thereby reducing the effects of the temperature extremes.

Hard Facing Disc

Wedge and seats are ground and lapped to a mirror finish and tightly guided to prevent dragging and seat damage.
Body and bonnet joint accurately machined with high surface finish stem and packing chamber.
Low emission valve technology with a design optimized for extended service life.
Low compression packing reduces friction and allows more room to re-torque in the field.
Packing ring construction for excellent sealing and a corrosion inhibitor.
Option: live loaded gland bolting
Lantern ring with double packing (upper & lower) for critical services

Applications for Gate Valves With Extended Bonnet

Red Point’s gate valves with extended bonnet can be deployed for a wide variety of applications in the oil & gas and (petro)chemical industries when high quality and highly reliable valves are required. A few example applications include:

• High-temperature services
• High-cycle and switching services
• Emergency shutdown valves (ESDV)
• High-integrity pressure protection system (HIPPS)
• High-pressure oxygen, nitrogen or hydrogen
• Solids handling (powders, fines, dust and catalysts)
• Polyethylene or polypropylene
• Coal conversion and gasification
• Thermal fluids
• Separator, filter and drying systems
• Compressor stations
• On/off isolation service
• Oil and gas manifolds

Body Material

Commonly used body materials




– Nickel Alloys (Monel®, Inconel®, Hastelloy®, Incoloy®)
– Duplex and Super Duplex
– Carbon steel and low temp carbon steel
– Low alloy steel
– Stainles steel
– Titanium
– Zirconium

View all materials

Get a quote today

To receive a production quote, please submit your RFQ and we will reply within 24 hours to you. Alternatively, send us your request by email: sales @ redpoint.nl

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