Trunnion Mounted Ball Valve

The trunnion mounted ball valve operates with a 90-degree rotation,and is primarily designed for on/off service. It features a spring-loaded floating seat mechanism that maintains positive sealing against both upstream and downstream sides, regardless of the valve being fully open or closed. Any trapped medium in the body middle chamber can be discharged through the discharge valve.

When abnormal pressure buildup occurs in the chamber due to temperature rise, the valve automatically releases pressure through its seat design without relying on a safety valve, significantly enhancing the safety of the pipeline system. The trunnion mounted ball valves are suitable for industrial applications that requiring tight shut-off and critical positioning.

The trunnion mounted ball valve features upper and lower bearing supports that significantly reduce friction and eliminate the sealing load torque caused by inlet pressure.

This design is particularly suitable for high-pressure working applications and requires relatively low operating torque.

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Details

Product Introduction

Ball valves offer low flow resistance.When a full-bore ball valve is open, the bore of the ball, valve body and connecting pipes share the same diameter and form a straight flow path, allowing the medium to pass through without restriction.

The ball valve can be fully closed or fully opened by rotating 90 degrees, enabling quick operation. Its compact size and lightweight design facilitate easy pipeline installation.

Advanced valve seat: Ensures excellent sealing performance, low friction coefficient, minimal operating torque. Offers multiple seat material options, suitable for a wide range of applications.

Applicable medium: water, gas, oil, natural gas, and acidic or alkaline corrosive medium.

Material Table

Component Name	Material
Component Name	ACB/A105+HCr (ENP)	WCB/304	WCB/316	CF8	CF8M
Body	A216 WCB	A216 WCB	A216WCB	A351CF8	A351CF8M
Bolt-1	A192 2H	A192 2H	A192 2H	A194 8	A194 8M
Nut-1	A193 B7	A193 B7	A193 B7	A193 B8	A193 B8M
O-Ring-1	Viton
Bushing	Metal backed PTFE
Gasket	A182 F6a	A182 F304	A182 F316	A182 F304	A182 F316
Stem	A182 F6a	A182 F304	A182 F316	A182 F304	A182 F316
Key-1	Carbon steel	Carbon steel	Carbon steel	Stainless steel	Stainless steel
Key-2	Carbon steel	Carbon steel	Carbon steel	Stainless steel	Stainless steel
O-Ring-2	Viton
Gasket	PTFE
Packing Gland	A105	A105	A105	A182 F304	A182 F316
Screw	A193 B7	A193 B7	A193 B7	A193 B8	A193 B8M
O-Ring-3	Viton
Ball	A105+HCr(ENP)	A182+F304	A182+F316	A182+F304	A182+F316
Seat	RPTFE
O-Ring-4	Viton
Seat	A105	A105	A105	A182 F304	A182 F316
Spring	SS304/Inoonel 750	SS304/Inoonel 750	SS316/Inoonel 750	SS304/Inoonel 750	SS316/Inoonel 750
Gasket	PTFE
Bolt-2	A192 2H	A192 2H	A192 2H	A192 8	A192 8M
Nut-2	A193 B7	A193 B7	A193 B7	A193 B8	A193 B8M
Bonnet	A216 WCB	A216 WCB	A216 WCB	A351 CF8	A351 CF8M
Lower Shaft	A182 F6a	A182 F304	A182 F316	A182 F304	A182 F316
O-Ring-5	Viton
Adjusting Pad	A182 F6a	A182 F304	A182 F316	A182 F304	A182 F316
Lower Bonnet	A105	A105	A105	A182 F304	A182 F316
Screw	A193 B7	A193 B7	A193 B7	A193 B8	A193 B8M