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Triple Offset Butterfly Valves

We offer OMB metal to metal Triple Offset Butterfly Valves (TOBV) for various applications in extremely cold cryogenic temperatures to significantly high temperatures in different configurations.

Special machining of the both seat and seal to match conical shape of the disc achieve the third offset enhancing bidirectional bubble-tight shut-off. In triple offset design, the contact between the seat and the seal is only at fully closed position, therefore; it becomes the best choice for high cycling applications due to the absence of friction between seal ring and seat resulting in very low stroking torque.

Helinor has supplied thousands of these valves to several Marine Vessels for:

  • LNG cargo handling systems
  • Fuel gas supply systems and LNGPac
  • Regasification and reliquidation units in FSRUs

These butterfly valves have BV type approval and have been successfully certified by other well-known marine classification societies such as DNV and LR and ABS etc.

LNG terminals, Oil and Gas onshore plants / FPSOs and hot temperature process lines in refineries are elsewhere these valves can seamlessly operate.  

Should you need more information, do not hesitate to contact us.

Size range
3''-96''/ DN80-DN2400
Pressure rating
ANSI 150lb-1500lb / PN25- PN250
Design temperature
-196°C to +815°C / -320.8°F to 1499°F
Carbon Steel (CS)/ Low Temperature Carbon Steel (LTCS)/ Stainless Steel (SS316, SS316L, CF3M, CF8M)/ / Duplex & Super Duplex /254SMO / Titanium/ Aluminum-Bronze(Al-Br)
  • Bidirectional torque seated design
  • Zero leakage acc. to API598 with laminated or solid metal seal rings
  • Stellite hard-faced integral seat and removable bolted seat increasing product life time with minimum maintenance
  • Top entry design for in-line inspection and maintenance if needed.
  • Design construction acc. to API 609
  • Inherently firesafe to API607
  • Body construction: Wafer, Lugged, Double Flanged (DF), Butt-Welded (BW)
  • Optional configurations:
       - Extended bonnet for cryogenic and high temperature applications

              - Jacketed body

              - Double block and bleed

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