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Trunnion Mounted ball valve

Trunnion Mounted ball valve

ST Trunnion Mounted ball valve is divided into cast steel ball valve and forged steel ball valve;
The valve body is divided to fix the ball valve, the ball is installed on the side, and the middle flange and neck are bolted.
It is mainly two-piece and three-piece, suitable for general industrial pipelines and long transport pipelines, and can also be used for various corrosive and non-corrosive media.
Users can choose full size or reduced size structure according to their needs;
According to customer's requirement, end connection for flange connection and welding connection;
Also can be provided according to the customer's use of the stem extension buried type all-welded ball valve.

Structural Features:

1、Body of high quality material, ball side mounted, middle flange and neck bolted

2、There are two types of seal between the seat and ball: traditional soft seal and hard seal

3、Valve seat piston effect :(1) both upstream and downstream are single piston seats;(2) Both upstream and downstream are double pistons;(3) Upstream is a single piston, downstream is a double piston

  • 4、Have fire prevention, anti - static device

    5、Supporting a variety of driving device connection plate.The driving device includes handle, worm wheel, electric, pneumatic, gas-liquid linkage, electro-hydraulic linkage and so on

  • 6、Easy to adjust the position.ST ball valves provide a "positioning slot" for easy and accurate locating of full open and closed ball valves when replacing or installing actuators online.

7、The end of the valve is a welded ball valve. The valve end material (ITD) can be adjusted according to the user's pipe material to ensure the weldability and adaptability of material strength.For both ends of the sleeve, the length of the sleeve can ensure that the field welding operation does not have any impact on the sealing material.

8、For buried valves, the stem may be extended as engineering requires for above-ground operation.




Design Specification:

Design criteria: API 6D  GB/T 19672  GB/T 12237

Structure length: API 6D   ASME B16.10   GB/T 12221

Wall Thickness:ASME B16.34、ISO 17292、BS 5351、GB/T 12224

Flange connection standard: ASME B16.5  ASME B16.47  GB/T 9113   JB/T 79   HG/T 20592

For welding connection standard: ASME B16.25   GB/T 12234

Fire protection requirements :API 6FA   API 607

Pressure test: API 6D  API 598  GB/T 13927  GB/T 26480


Performance Parameters:

Body material:WCB(A105)、LCB(LF2)、LCC(LF2)、CF8(F304)、CF8M(F316)、CF3(F304L)、CF3M(F316L)、4A(F51)、5A(F53)、6A(F55)..

Seat material:PTFE、RPTFE、PEEK、NYLON、DEVLON、PPL

Metal seat material:STL、WC、NITRIDING、NI55

Nominal size: NPS 1 "~60" DN25~DN1500

Pressure range: Class 150~2500 PN10~PN420

Operating temperature: -196℃~+800℃


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