Mounting Bracket/Extension Bonet

Mounting Bracket/Extension Bonet

Mounting brackets are used for mounting the valves on it.

An extended bonnet is used for both low-temperature and high-temperature applications. The extended bonnet has the function of protecting the stuffing box and preventing leakage of the stem packing.

Low-temperature applications and types of medium examples include LNG applications, ethylene liquid, oxygen, liquid hydrogen, and liquefied natural gas.

High-temperature applications and types of medium examples include steam applications, and sour service.

With the cut seal valve there are three offsets. Two are placed in a similar position to the cut seal valve, while the third offset is the geometry of the seating surface, creating a type of cone shape of the disc and seat. This cone angle, along with the two eccentric shaft offsets, allows the disc to seal against the seat with no friction. This seat design also allows for uniform sealing, and thus a tight shutoff in a metal seat design. This design is a lower cost, lower torque option (easier to automate), than alternative style metal seated valves.


SS316, Duplex 4A
EN8, Duplex 4A
GR. 70, SS316, S304
17-4-PH, SS431, Duplex 4A
17-4PH, XM19, IN718, SS431
SS316, Duplex 4A , Duplex 5A, SS410, K500

SS431, 17-4 PH, Duplex 4A, Duplex 5A, XM19 Monel K500, K400, SS316

SS410, Duplex 4A, Duplex 5A, Duplex 6A, Monel K500, K400, SS316, SS304, IN625, IN825, H-C276


  • Metal-to-metal sealing
  • Triple eccentric quarter-turn design
  • Torque seated
  • Bi-directional tight shutoff
  • Zero leakage
  • Non-rubbing seating
  • Inherently fire-safe and fire tested


  • Process fluids
  • Hydrocarbons
  • Steam/Geothermal steam
  • Hot gas/Sour gas (NACE)
  • Blowdown
  • Sulfur recovery
  • Acid, Caustic, Chloride
  • Abrasive service

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