The valves provide high flow capacity, tight shutoff, and long service-free life in extreme environmental conditions. Cryogenic ball valves are available in all sizes and pressure classes for operating temperatures from -196°C to +120°C. The typical material of construction is Stainless Steel SS316. Valves are designed with rigid body construction to reduce the impact of thermal shock.
VAHN-TECH can provide any size of ball valves with extended bonnet for special installation requirements, such as buried service and low temperature and cryogenic applications. The extended bonnet provides a fully enclosed pressurized column with all stem seals located at the top of the bonnet, away from the cold area, preventing the valve from malfunctioning due to freezing. The length of the extensions is defined according to installation and temperature requirements to ensure the stem packing is maintained at a high temperature suitable for an optimized sealing performance. The extension stems are fitted with the necessary piping to facilitate drain, vent, and sealant injection or lubrication as required.
|DESIGN STANDARD||API 6D / BS EN ISO 17292 / ASME B16.34|
|SIZE RANGE||½” – 24”|
|PRESSURE RATING||Class 150 – 900|
|WORKING TEMPERATURE||-196˚C ~ +320˚C|
|END CONNECTION||ANSI B16.5 - Flange ASME B16.25 - Butt-Weld|
|FACE to FACE||ASME B16.10|
|TEST & INSPECTION||API 598 / API 6D|
VAHN-TECH Cryogenic ball valves are suitable for: