Trunnion Mounted Ball Valves

Helinor can offer trunnion mounted ball valves following API6A and

API 6D design code from OMB brand.

Body construction can be in one-piece for top entry design for in line maintenance, in two or three pieces fully welded or bolted depending on requirements. Our ball valves can be offered with reduced bore(RB) or full bore (FB) and can have self-relieving seat with both single piston effect or double piston effect design to enhance sealing capability.

Cryogenic Solution: These Ball valves can be offered for LNG and Cryogenic services with extended bonnet (design acc. BS6364) and special seat insert with LIP seals (single or double Lip seals sealing) to withstand temperature as low as -196°C. Drip plates is also an option to equip extension upon request.

All Cryogenic tests in liquid Nitrogen at -196°C are performed in several test benches inhouse OMB.

High Temperature Solution: We can also offer these ball valves for high temperature services in metal seat with Graphite seals and close tolerances to offset thermal expansion.

These valves can have different coatings for various temperature requirements, and all have the design appraisal by FEA for thermal expansion.

Size Range 2″ to 60″/DN50-DN1500
Pressure Rating 150lb-2500lb/ PN20-PN420
Design Temperature -196°C to +538°C/ -385°F to 1000°F
Materials Carbon, Alloy and Stainless steel, Duplex and Super Duplex, 904L, Nickle alloys, Titanium, Aluminum-Bronze etc.
Technical Features Soft or metal seated
Seat construction with Single Piston Effects (SPExSPE) or Double Piston Effect (DPExDPE) on both seats or the combination of these two.
Antistatic device
Anti-Blowout design
Qualified design in accordance with fugitive emission standard ISO15848
Firesafe design acc. to API607, API 6FA and ISO 10497
Double block and bleed function
Design Configurations Body design:

3 pieces-Side Entry, bolted (BSE)
1 piece-Top Entry (BTE)
2 or 3 pieces fully Welded, Side Entry (WSE)
End connections:

Flanged to ASME/ANSI standards
Flanged to DIN and GOST standards
Compact Flanges to NORSOK L005 or special design
Butt-Weld ends with or without pups pieces
Hub connections
Others on request


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