Cryogenic Ball Valve, Extended Bonnet with BS 6364 Test

Top Entry Cryogenic Ball Valve

Do you want to know what the cryogenic ball valve with extended bonnet is and the tips of material choice and inspection? After reading this article, I believe that you will have a huge gain in the field of cryogenic ball valve design.

When Natural Gas has to be separated into fractions or treated to protect equipment from contaminants (acids), sweetening and acid removal at -51° to -196°C (-59,8° to -320,8°F), are the final stage to do that, starting from liquefaction to sub-cooling stages, with pure or mixed refrigerants (methane, nitrogen) as cooling elements.

RAYS FLOW CONTROL is the manufacturer of cryogenic ball valves with an extended bonnet design.

The cryogenic ball valve specific in LNG valve application.

Our production program offers special valve solutions engineered to suit cryogenic processes with specific constructions and duly selected materials.

Base on the cryogenic service, RAYS design base on API 6D and API 607 Fire Safe with extended bonnet ball valve and complete tested refer BS 6364 standard.

Product Description

Name: Cryogenic Ball Valve

Other names: API 6D Ball, API 607 Ball Valve, Trunnion Ball Valve, Motorized Ball Valve

Standard: API 6D, API 608, ASME B16.34, GOST and EN / DIN

Material: Austenitic Stainless Steel, Forged Steel, and Cast Steel


The cryogenic ball valve is applicable to the different pipelines of Class 150~Class1500, PN16~PN100, JIS10K~JIS20K. By adopting different materials, it is applicable to different working temperatures and mediums. The minimum temperature for the ball valve is -196℃. The operation of the ball valve can be manually operated, gear operated, pneumatically operated, and motor operated. The end connection usually is flanged ends. However, the welded ends are also optional.

Product range

The cryogenic ball valve design has two types: Floating ball valve and trunnion mounted ball valve. For their range, face to face dimension, and flange dimension, please refer to the corresponding data of common floating ball valve and trunnion mounted ball valve. For valves with the working temperature above -50℃, a long neck design is seldom adopted. For valves with working temperature below-50℃, the neck length T shall be 250mm or shall be decided as per our own design and calculation.

The cryogenic ball valve is used for low-temperature working conditions, especially for some hazardous media, such as liquidized natural gas. Our company has been experienced in the design, manufacturing, inspection, and test of the cryogenic ball valve.

Choose for material

Common steels are brittle in the cryogenic condition. So, the key point for the design and production of the cryogenic ball is to select proper body material according to the minimum working temperature. To ensure the material suitability under the low-temperature condition, the material adopted shall be impact tested according to the standard requirement. The packing, gasket, bolt, and nut shall also adopt the materials suitable for low-temperature conditions.

Inspection and Testing

The RAYS Cryogenic Ball Valve can be base on a floating cryogenic ball valve and trunnion cryogenic ball valve, also top entry cryogenic ball valve.

All of the types are based on fire safe API 607 design, and cryogenic testing & inspection are based on BS 6364.

The cryogenic ball valve should be cleaning process without oil grease, and valve shell/body testing by high-pressure air (nitrogen) on design class.

The Cryogenic ball valve can be a motorized ball valve, electric ball valve, actuated ball valve, and also suitable for high-pressure ball valve. If you want to find a reliable cryogenic ball vale manufacturer or supplier, welcome to visit RAYS FLOW CONTROL.