Long stem ball valve is a specialized valve device that achieves control under extreme operating conditions through an extended stem structure. Its core features include a stainless steel body, a long-neck bonnet, and a surface-hardened stem, enabling it to withstand extreme temperature fluctuations ranging from -196°C to +80°C.
This type of valve is widely used in the transportation of cryogenic media such as liquid nitrogen and liquefied natural gas (LNG), as well as in buried applications in industries like coal chemical processing and oil pipelines. Some models are equipped with a stem anti-ejection device, which secures the stem in place using a cap and fastening bolts, effectively reducing transportation-related damage.
Specification
Size Range And Pressure Class
Size from 2" to 48" (DN50-DN1200)
Pressure from 150LBS to 2500LBS (PN16-PN420)
Design Standards
Design / Manufacture as per the standards
API 6D; ASME B16.34; DIN 3357; EN 13709; GB/T12237; BS5351
Face to Face Length (Dimension) as per the standards
ASME B16.10; EN 558-1 Gr. 14 (DIN 3202-F4); DIN 3202-F5; DIN 3202-F7; BS5163
Flanged Dimension according to the standards
ASME B16.5; EN 1092-1; BS4504; DIN2501;
Flanged to ASME B16.5 (2" ~ 24") and ASME B16.47 Series A / B (26" and above) Clamp / Hub ends on request.
Testing according to the standards
API 598; API 6D; EN 12266-1; EN 1074-1; ISO5208
Construction Materials
Application Fields
Low-temperature scenarios: Used for medium transportation such as ethylene and liquid hydrogen, suitable for extreme conditions of -196°C.
Energy pipelines: Serve as key control components in liquefied natural gas (LNG) transportation systems.
Industrial installations: Widely applied in pipelines of coal chemical, petrochemical, rubber, papermaking, pharmaceutical, and other industries, functioning as a medium for flow distribution, merging, or directional switching.
GNEE Long Stem Ball Valve for sale
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