Pressure Seal Bonnet Globe Valve Design Standards

Type of disc Plug, needle, swivel, regulating disc
Construction Pressure seal bonnet
Pattern Straight, Angle, Y-type
End connections Flanged, BW, SW, THR, HUB
Options Extended bonnet, bellow sealed, Heating Jacket, Screw-down/non-return
Seating options Soft or metal seated, renewable, HF
Operated Handwheel, actuator operated, bare stem
Bellow seal materials 304 - 321 - 316Ti - Alloy 625 - C276
Design & testing All available international standards according to API - EN - ISO
Fire safe design

Size and pressure ranges

  • Size and bore:
    - ANSI 1/4” - 16”
    - DN 6 - DN 400
  • 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

Pressure seal bonnet and Hard facing disc

Pressure seal bonnet

Reliable and simple design principles, Red Point pressure seal bonnet (PSB) have proven capability to handle increasingly demanding applications. PSB valve designs weighed significantly less compared to bolted bonnet (BB). BB design body flange and bonnet flange are joined by stud/nuts and a gasket inserted between the faces to seal. Stud/nuts are tightened to prescribed toques to affect optimal sealing. When a system pressure increases a potential leak through body/bonnet joint increases. Our pressure seal design is equipped with bonnet lift-up bolts (live-loading type) to pull the bonnet up and seal against the pressure seal gasket. This creates seal between gasket and ID of the valve body, our segmented thrust ring maintain the load. When system pressure builds-up, so does the load in the bonnet and pressure seal gasket. System pressure increases, potential leak through body/bonnet joint decreases. The minimum consistent operating pressure is in excess of 525psi.

Hard Facing Disc

To prevent wear and tear due to the abrasive media, Red Point uses several surface treatment techniques to increase the service lifetime of valves and its components.
Depending on the material in question, a few techniques we can use are overlay welding, HVOF, Kolsterizing, anodizing or just plain heat treatment.
These treatments, in combination with a keen design, entered to your specific process conditions, will result in a high quality valve, which will perform for many years.

Applications for Pressure Seal Bonnet Globe Valves

Red Point’s globe valves with pressure seal 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

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