Wenzhou Goldtop Valve Co.LTD
Wenzhou Goldtop Valve Co.LTD

Gold top valve  located in Oubei Town, Wenzhou, China,where can make all kinds of precision balls,including top entry,metal seat and V type balls.On this base,our products range of floating,trunnion,Gate globe check valve ,butterfly valve ,etc.Surely we can design them by customer's special requirements.

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Nylon Seat Trunnion Mounted Ball Valve with Casting And Forged Steel Body

Nylon Seat Trunnion Mounted Ball Valve with Casting And Forged Steel Body

  • Nylon Seat Trunnion Mounted Ball Valve with Casting And Forged Steel Body
  • Nylon Seat Trunnion Mounted Ball Valve with Casting And Forged Steel Body
Nylon Seat Trunnion Mounted Ball Valve with Casting And Forged Steel Body
Product Details:
Place of Origin: 中国
Brand Name: GOLD TOP
Certification: API6D
Model Number: Q41F
Payment & Shipping Terms:
Minimum Order Quantity: 1pcs
Packaging Details: wooden box
Delivery Time: 5~35days
Supply Ability: 100+pcs+25days
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Detailed Product Description
MATERIAL: WCB、A105、LCB、LF2、CF8、F304、CF8M、F316, Etc. Connection: RF BW SW ASME B16.5、ASME B16.25
Pressure: 150lb~2500lbs Standard: API 6D&ASME B16.34
Product Description: Side-mounted Ball Valve TRIM: NO.8 TRIM NO.5
Connecting End: ASME B16.5、ASME B16.25
High Light:

three way ball valve


blowout proof stem ball valve

Trunnion-mounted ball valves soft seat R-PTFE NYLON SEAT , CASTING&FORGED STEEL BODY


Trunnion-mounted ball valves for pipeline, process, power, oil & gas and other flow control applications where quality, design, safety, and environmental protection are paramount.

Tiger Valve Trunnion Mounted Ball Valves are engineered to the latest API, ISO and ASME standards and manufactured using best-in-class materials and technologies. The result is the highest quality and most competitively-priced trunnion-mounted ball valve available.

Tiger Valve Trunnion Mounted Ball Valves address all of the safety, quality and design issues important for ensuring consistent field performance and environmental protection and are designed to provide superior performance in a variety of applications including offshore platforms, oil, gas and other liquids pipelines, tank farms, meter stations, chemical processing plants and refineries.


The key difference beteween a floating ball valve and a trunnion mounted ball valve is how each achieves a line seal. Trunion mounted ball valves are uses a spring mechanism and/or line pressure assistance to drive the upstream seat against the stationary ball. The surface area exposed to the pressure through the relatively small passageway is actually just the back of the seat.


The floating ball valve utilize natural line pressure to press and seal the ball against the downstream seat. The line pressure is exposed to a greater surface area - the entire upstream face of the ball, which is an area equal to the actual pipe size.


A floating ball valve is a valve with its ball floating (not fixed by a trunnion) inside the valve body, it drifts toward to the downstream side and tightly pushes against the seat under the medium pressure to ensure sealing reliability. The floating ball valve has simple structure, good sealing performance but the seat material is required to withstand the workload since the sealing pressure is bared by the seat ring. Due to unavailability of high performance seat material, floating ball valve is mainly used in middle or low pressure application.


Design FeaturesReliable Seat Seal

The structure design of double-beveled sealing ring has been adopted to reduce the friction between the ball and the sealing ring to achieve lower operation torque. When the medium pressure is low, the ball has smaller contacting surface with sealing ring, which introduces higher sealing pressure to ensure the sealing reliability. When the medium pressure gets higher, the contacting area between ball and sealing ring increases accordingly. Larger contact area reduces the sealing pressure to avoid the deformation of sealing ring.



Fire Safe Design

In case of fire, non-fireproof material for packing and seat will be burnt-out and considerable medium leakage may possibly cause fire spread. CRV adopted metal to metal seal as auxiliary structure to prevent medium leakage in case of fire as shown in figures. The fire safe design confirms to the requirements of API607, API 6FA and BS 6755.



Ball of trunnion ball valve is fixed, it does not move with medium pressure. Trunnion ball valve has floating seats. The seats move with the medium pressure to tight the ball and seal ring to ensure sealing reliability. Bearings could be mounted in top shaft and bottom shaft, which reduces operation torque. This is widely used in valves with high pressure and big sizes. To decrease the operation torque and increase sealing reliability, lubricated ball valves are adopted in recent years. A special sealant is injected between sealing faces of lubricated ball valve to create a layer. This increase the sealing reliability while decreasing the operation torque, which is better for high pressure, big sized ball valves.




2"- 36" ANSI

Class: 150, 300, 600, 900, 1500 & 2500

In Full and Reduced Port

Main Parts



Nylon Seat Trunnion Mounted Ball Valve with Casting And Forged Steel Body 0

TVC Trunnion Mounted Ball Valves
Order Matrix


Bill of Materials


Nylon Seat Trunnion Mounted Ball Valve with Casting And Forged Steel Body 1

Contact Details
Wenzhou Goldtop Valve Co.LTD

Contact Person: sales

Tel: +8613758447235

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