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Home > Forged Steel Ball Valve > China Compact Cryogenic Trunnion Mounted Ball Valve with Worm Gear - China Suppliers and Factory for High-Pressure Applications Supplier, Factories
China Compact Cryogenic Trunnion Mounted Ball Valve with Worm Gear - China Suppliers and Factory for High-Pressure Applications Supplier, Factories
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China Compact Cryogenic Trunnion Mounted Ball Valve with Worm Gear - China Suppliers and Factory for High-Pressure Applications Supplier, Factories

China Compact Cryogenic Trunnion Mounted Ball Valve with Worm Gear - China Suppliers and Factory for High-Pressure Applications Supplier, Factories

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√ Our trunnion mounted design guarantees stable sealing and minimal operating torque, making it ideal for high-pressure applications.

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√ The extended stem with a cryogenic neck effectively isolates the packing from extreme low temperatures, ensuring prevention of external leakage.

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√ Featuring a compact short-body structure, our valve saves valuable installation space while upholding cryogenic safety standards.

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√ The worm gear operation offers smooth and reliable manual control, particularly beneficial for large-size valves.

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√ Designed with fire-safe, anti-static, and anti-blowout stem features, our product ensures maximum safety in critical services. As a leading China supplier with an advanced factory, we are committed to providing high-quality valves tailored for various industrial needs.

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Product Description

Key Features
Trunnion Mounted Structure

Stable sealing and low operating torque under high pressure, ideal for large-size cryogenic service.

Extended Stem & Cryogenic Neck

Isolates packing from -196°C media, reducing leakage risk in ultra-low temperature environments.

Compact Short-Body Design

Space-saving structure for skid-mounted or modular systems while maintaining cryogenic integrity.

Worm Gear Operation

Smooth and controlled manual actuation with reduced torque, suitable for frequent operation.

Cryogenic Sealing System

Specialized seat and seal materials accommodate low-temperature contraction for reliable shut-off.

High Safety Design

Anti-blowout stem with optional fire-safe and anti-static devices for critical and hazardous applications.

Frequently Asked Questions
What is a trunnion mounted ball valve and why is it preferred for cryogenic service?
A trunnion mounted ball valve features a fixed ball supported by trunnion bearings at the top and bottom, which absorbs line pressure and reduces operating torque. This structure provides stable sealing performance under high pressure, making it the preferred choice for large-diameter cryogenic applications where reliable shut-off is critical.
How does the extended stem and cryogenic neck design prevent leakage at ultra-low temperatures?
The extended stem and cryogenic neck keep the packing gland area away from the extremely cold media (down to -196°C). By maintaining the packing at a warmer ambient temperature zone, the risk of seal embrittlement and leakage is significantly reduced, ensuring long-term sealing integrity in LNG, liquid nitrogen, and other cryogenic fluid systems.
What are the advantages of a compact short-body design in cryogenic valve applications?
The compact short-body design reduces the overall face-to-face dimension of the valve, saving valuable space in skid-mounted or modular process systems. Despite its smaller footprint, the valve fully maintains its cryogenic integrity, pressure containment capability, and sealing performance — making it an efficient solution for space-constrained installations.
Why is worm gear operation recommended for cryogenic ball valves used in frequent cycling?
Worm gear actuators provide mechanical advantage that significantly reduces the manual torque required to operate the valve. This makes opening and closing smooth and controlled, even for larger valve sizes or under high differential pressure conditions. For applications requiring frequent operation, worm gear actuation minimizes operator fatigue and ensures consistent, reliable performance over time.
What materials are used in the cryogenic sealing system to handle extreme low-temperature contraction?
Cryogenic sealing systems typically use specialized seat and seal materials such as PTFE, PEEK, or reinforced polymer composites that retain flexibility and dimensional stability at temperatures as low as -196°C. These materials are selected for their ability to accommodate thermal contraction without losing sealing force, ensuring a reliable and bubble-tight shut-off throughout the full cryogenic temperature range.
What safety features are available for cryogenic ball valves used in hazardous or critical applications?
For hazardous and critical service environments, cryogenic ball valves can be equipped with an anti-blowout stem design that prevents the stem from being ejected under pressure. Optional fire-safe construction meets API 607 or API 6FA standards to maintain sealing integrity during a fire event. Anti-static devices are also available to safely discharge electrostatic charges that may accumulate during valve operation, reducing ignition risk in flammable or explosive media applications.

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