Forged Steel Trunnion Mounted Ball Valve

Short Description:

  • Double block and bleed (DBB)
  • Spilt body or side entry, 2pc or 3pc body
  • Bolted bonnet
  • Anti Static spring
  • Anti Blowout Stem
  • Fire safe
  • Self Cavity relief

Product Detail

Product Tags


Design Standard: API 6D/API 608
Fire safe: API 607/6FA
Pressure temperature Ratings: ASME B16.34
Size Range: 2” to 48” (DN50-DN1200)
Port: full bore or reduced bore
Pressure Range: 150LB to 2500LB
End Connections: Flanged RF, RTJ, Butt Weld
Ball Type: Forged solid ball
Flanged End Dimensions: ASME B16.5 (24” and below), ASME B16.47 Series A or B (above 24”)
Butt Weld End Dimensions: ASME B16.25
Face to Face Dimensions: ASME B16.10
Inspection and Testing: API 6D
Body materials: A105/A105N, F304, F316, F316L, F51, F53, F55, C95800, UNS N08825, UNS N06625.
Seat Materials: PTFE, RPTFE, DEVLON, NYLON, PEEK, metal seated with TCC/STL/Ni.


NACE MR 0175
Stem Extension
Cryogenic Testing
Alloy Steel Bolting
Double effective piston (DIB-1, DIB-2)


Forged body material, much more stable perfomance than casting body which may have inter defects, since the body is made from forged material, no any repair and the surface looks good. Only solid ball is used to ensure a excellent performance. Compared with floating ball valves, the ball is fixed by both stem and bottom trunnion, so it have lower torque value. When the pressure in the cavity is high, it will push the spring seat move, make it preasure self release. Our trunnion mounted ball valves is strictly designed and produced as per API6D and related standard, 100% tested as per API6D. Painting can be custom appointed as per client requests, such as JOTUN, HEMPEL. TPI is accepted for either process inspection or final dimensional and testing inspection.

Product Introduction

Ball valves is a 90 degree turn type valve, the closure member is a ball which can rotating 90 degree. When the valve is positioned where the bore is aligned in the same direction as the pipeline, the valve is open, and turning the ball by 90 °, then the valve closed. There’s a stem and trunnion to fix the ball, and the ball can not move like a floating ball valve, so called trunnion mounted ball valve. Compared with multi-turn valves, ball valves with shorter opening and closing time, longer lifetime, and less space for installation, and the opened or closed state of the valve can be easily detected by position of the handle. Ball valve is widely used in oil & gas, petrochemical, power industries, and usually for on-off application, not suitable for capacity control purpose.

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