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trunnion ball valve features

Floating and trunnion-mounted ball valves are available with a side entry” and top entry” design. This design, which is lightweight and economic, suits bore sizes up to 10 inches: above this bore size, the seats of the valve would not be able to withstand heavier and heavier balls and the valve would not operate safely and efficiently. Didtek Industrial Oil Refinery Carbon Steel 2pc Trunnion Mounted Flange Ball Valve With Pneumatic Actuator Trunnion Ball Valve Figure:DIDTEKCTBV Applicable Standards: – Ball Valve design according to API6D,BS5351,ASME B16.34 – Fire Safety API607, API6A – Face to face ASME B16.10, API6D – End Flanges ASME B16.5/ASME B16.47 – Butt Welded ends ASME B16.25 – Inspection and test API 598, API6D Size Range: – 2″~48″ Pressure Rating: – ASME CL, 150, 300, 600 Temperature Range: – -196°C~650°C. Structure: Floating or trunnion mounted ball, full or reduced bore, 1pc,2pc or 3pcs Flange connection: EN1092 & ANSI B16.5 & JIS Type Flange RF, RTJ Maximum working temperatures: Nitril:80°C NBR:110 °C EPDM:110 °C PTFE:150 °C, Metal seat for high temperature.

SPECIFICATIONS FOR STANDARD BALL VALVES Pressure rating and size: PN10 to PN160,ANSI Class150 to Class 2500, JIS 10K/20K DN50 to DN2000 2″~80″ 50A~2000A Material: Body : WCB, CF8, CF8M Bonnet : WCB, CF8, CF8M Ball : A105, SS304, SS316 Stem : F6a, SS304, SS316 Seat : EPDM,Metal,Viton,PTFE,NBR Special material on request. A trunnion ball valve works the same as a normal ball valve, but the ball is supported by protruding shafts rather than a floating ball pushed against the seals with the media flow. The majority of ball valves in the world don’t have a trunnion design, they are called floating ball valves In this design, the ball is held into place by the compression of the seat rings on both sides.

Examples of forged ball valves (small size and stainless steel valve with a forged body, trunnion mounted). Besides a size flexibility advantage, a trunnion valve features a lower operating torque compared to a floating valve design (which can become a benefit when the valve needs to be actuated, as smaller and economical actuators can be fitted to operate the valve). In a floating valve, the ball is suspended in the flowing fluid and is kept in position by the compression of two elastomeric seats against it.

valvinox trunnion ball valve ,rizzio trunion ball valve

Trunnion mounted valve is a solution to the problem of excessive torque required by a floating type valve in high-pressure service. In a floating ball valve, the ball is held in the position by the compression of the two elastomeric seats against the ball. Learn about 6 Types of Ball Valve – Floating, Trunnion Mounted & more.

INTERNAL TRUNNION DESIGN: Upper and lower bearing plates hold the ball in place, preventing the ball from floating axially and avoiding excess load on the seats. A ball in a floating ball valve is floating and pushes against the seat ring with the media flow, increasing the operating torque. In the trunnion valve design, the ball is not floating anymore and instead the seat rings are floating.

more links:

http://blogscat.com/a/valvinox/2020/09/21/the-definitive-guide-to-trunnion-ball-valve/
http://blogs.dotnethell.it/valvinox/all-you-should-know-about-trunnion-ball-valve__86044.aspx
http://blogs.dotnethell.it/valvinox/TK-Trunnion-Mounted-Ball-Valve__86194.aspx

 

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