Wuxi PYNOS Flow-tech Co., Ltd. : Your Professional Trunnion Mounted Ball Valves Supplier in China

PYNOS VALVE is a professional valve manufacturer integrating research, development, testing, production, sales, and after-sales service. Additionally, we are equipped with world-class valve processing and manufacturing equipment.

Advanced Production Equipment

Our factory is equipped with advanced CNC lathes, boring machines, CNC grinding machines, drilling machines, milling machines, and planers.

Wide Applications

Our products are widely used in the petroleum, chemical, power, natural gas, and coal chemical industries.

 

Guaranteed Quality

Our products have obtained multiple certifications, including ISO 9001, CE, and SIL3.

Customizable

The materials, dimensions, and connection methods of our products can all be customized.

 

 
  • 2pc Trunnion Mounted Ball Valve
    The 2pc Trunnion Mounted Ball Valve is a fixed ball valve used for opening, closing, and shutting off fluids in industrial pipelines. It can be ordered in bulk or customized.
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  • 3pc Trunnion Mounted Ball Valve
    The 3pc Trunnion Mounted Ball Valve is a ball valve used for fluid control in industrial pipelines. It is available in bulk and can be customized.
    read more
  • All Welded Ball Valve
    All-welded ball valves are available in bulk and can be customized. They are suitable for pipeline fluid control in high-temperature, high-pressure, and corrosive media.
    read more
 

Introduction

 

 

A Trunnion Mounted Ball Valve is a type of ball valve designed for high-pressure and large-diameter applications. Unlike a floating ball valve, the ball is anchored at the top and bottom (trunnions), which reduces the load on the valve seats and makes operation easier in high-pressure systems.

 

Specification

Product name

Trunnion mounted ball valves

Construction

2 Pieces Flanged Split Body with

Size

DN 1/2" – DN 10"(PN10-40/ANSI150-ANSI300)

Rating

PN10-420 /ANSI 150-2500

Materials

ASTM A 105 / ASTM A 479 F304/ ASTM A479 F316

Seats

Soft or metal seated

Working temp

-196 ℃- + 400 ℃

 

Features of Trunnion Mounted Ball Valves

 
2pc Trunnion Mounted Ball Valve
  • High-pressure Capability

    Suitable for pipelines up to Class 1500 or 2500, and large diameters.

  • Reduced Operating Torque

    Because the trunnion bears most of the pressure, the ball moves more easily.

  • Bidirectional Sealing

    Supports flow in either direction.

  • Fire-safe And Anti-static Options

    Commonly used in critical oil, gas, and chemical systems.

 

Common Materials

Body

Carbon steel, stainless steel, alloy steel

Ball

Stainless steel or chrome-plated steel

Seats

PTFE, RPTFE, PEEK, or metal seats for high temperature

 

Customization Options

Pressure Rating and Class
Valves can be customized for ANSI/ASME Class 150, 300, 600, 900, 1500, or 2500.

 

Body and Bonnet Materials
Material options include carbon steel, stainless steel (304/316), alloy steel, or duplex steel.

 

Bore Type
Valves can be full bore or reduced bore.

 

Trunnion and Stem Design
Trunnion and stem designs can be customized for blow-out proof, anti-static, or fire-safe compliance.

Actuation Options

Valves can be equipped with manual gear operation, pneumatic actuators, or electric actuators.

Connection Types

Available connections include flanged (RF or RTJ), butt-weld, or threaded ends.

Surface Treatment and Coating

Internal and external surfaces can be polished, coated, or passivated for corrosion protection.

 

 

Certificate

 

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FAQ

 

Q: How does it differ from a floating ball valve?

A: In a floating ball valve, the ball is held only by the downstream seat and moves with line pressure. In a trunnion mounted valve, the trunnion supports the ball, reducing friction and torque, especially in high-pressure systems.

Q: Can trunnion mounted ball valves be used for bidirectional flow?

A: Yes. Most trunnion valves provide bidirectional sealing, allowing installation in either flow direction without affecting performance.

Q: Are trunnion mounted ball valves suitable for automation?

A: Yes. They can be fitted with manual, pneumatic, or electric actuators. ISO 5211 mounting pads are standard for actuator compatibility.

Q: How is the valve protected in fire or high-temperature situations?

A: Many trunnion valves feature fire-safe design, including metal backup seats and reinforced trunnion support, ensuring sealing performance during high-temperature exposure.

Q: What testing and documentation are provided?

A: Trunnion mounted ball valves can be supplied with hydrostatic and pneumatic tests, functional tests, material certificates (EN 10204 3.1), API inspection reports, and custom documentation per project specifications.

We're well-known as one of the leading trunnion mounted ball valves manufacturers and suppliers in China. If you're going to buy high quality trunnion mounted ball valves, welcome to get more information from our factory. Customized orders are welcome.

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