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Trunnion-mounted ball valve

Trunnion-mounted ball valve
Trunnion-mounted ball valve

Size1/2″~14″ (DN15~DN350 mm)

OperatedLever, Worm Gear, Pneumatic actuator, Electric actuator

Conection endDouble Flange Type

Conection standardPN10 / PN16 / PN25 / PN40 / PN63, 150LB / 300LB / 600LB

Working pressurePN16 / PN25 / PN40 / PN63 / PN100

Body materialWCB, Stainless steel, Duplex steel

Disc materialA105, SS201, SS304, SS316

Seat materialPTFE, Cr13, Stainless steel, Duplex steel + Ni60

Product Details

A ‌fixed ball valve‌ (also called ‌trunnion-mounted ball valve‌) is a high-performance valve where the ball is ‌fixed by upper/lower shafts‌ and supported by bearings. Unlike floating designs, the ball ‌does not shift‌ when pressurized—instead, seal pressure comes from spring-loaded or pressure-energized seats.  

Technical Standard:
1.Design Standard: API 608 /GB T12237.
2.Face to face: ASME B16.10 / GB T12221.
3.Flange Standard: ASME B16.5 / JB T79.
4.Test Standard: API 598.
 
Product Advantages&Our Service:
1.‌Dual Trunnion Support‌
The ball rotates on fixed shafts with ‌bearings (e.g., PTFE-lined)‌, reducing friction and operating torque by >50% compared to floating valves‌. 
2‌.Spring-Loaded Seats‌
Dual seats (upstream/downstream) with ‌springs behind PTFE/PEEK seals‌ maintain contact with the ball. Wear triggers spring compression for ‌auto-sealing compensation. 
3‌.Fire-Safe Design‌
Embedded ‌metal-to-metal seals‌ activate when polymer seals burn (>260°C), complying with ‌API 607/6FA fire-safety standards. 
4‌.Pressure Relief Function‌
Excessive cavity pressure pushes seats backward automatically, preventing body rupture‌
5.Pressure Testing Report,3.1 Certificate of Material can be provided.
 
‌Applications:‌
 1.‌Oil & Gas Pipelines‌: High-pressure gas shutoff (DN200+, 600lb+ rating).
 2‌.Chemical Plants‌: Corrosive media control (e.g., stainless steel body + PTFE seats).
 3‌.Power Systems‌: Steam lines (350°C tolerant designs).
 4.‌Water Treatment‌: Large-diameter mainlines (DN2000 full-bore valves)
 5.‌Pharmaceuticals‌: Sterile fluid handling (sanitary designs).
 
Face to face dimension:
DN  mm 15 20 25 32 40 50 65 80 100 125 150 200 250 300
inch 1/2 3/4 1 1-1/4 1-1/2 2 2-1/2 3 4 5 6 8 10 12
L(PN16/25) 130 140 150 165 180 200 220 250 280 320 360 400 450 620
L(PN40) 130 140 150 180 200 220 250 280 320 400 400 550    
L(PN63) 165 190 216 229 241 292 330 356 432 508 559 660    
L(150LB) 108 117 127 140 165 178 190 203 229 356 394 457 533  
L(300LB) 140 152 165 178 190 216 241 282 305 381 403 502 568  

The data is for reference only, please consult  sale@valflovalve.com  for details.

QUESTIONS

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FACTORY PHOTOS

Valve Factory Production Process
Valve punching photo
Valve polishing photo
valve assembly photo
Valve Quality Inspection Process
Valve pressure test photo
Valve diameter measurement photo
Valve painting inspection photo
Valve Packaging and Transport
Valve packing photo
Valve safety packaging photo
Valve transportation photo
Valve Spare Parts
 factory spare parts photo1
 factory spare parts photo2
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