Top-Entry Cryogenic Ball Valve Description
Top-entry cryogenic ball valves, also known as top-entry ball valves, are named because the ball, which opens and closes the valve body, is installed from the top down. They are primarily used in LNG (liquefied natural gas) receiving terminals, liquefied petroleum gas (LPG) and LNG filling stations, LNG tankers, ethylene liquefaction plants, air separation, and other cryogenic industries. The special series of top-entry cryogenic ball valves utilizes internationally advanced technology and employs a dedicated lip-seal seal, ensuring excellent sealing performance.
The structural advantages of low-temperature top-entry ball valves
Top-entry design structure: Allows for quick inspection and maintenance of internal components during pipeline system operation without disassembling the pipeline, significantly reducing maintenance costs and time.
High sealing performance: Utilizes advanced sealing materials and technologies, such as polytetrafluoroethylene (PTFE) or metal-to-metal sealing, to ensure excellent sealing performance even under low-temperature conditions.
Long-life materials: Low-temperature ball valves are made of impact-resistant stainless steel materials, such as austenitic stainless steel, which exhibit good mechanical properties and corrosion resistance at low temperatures.
Top-Entry Cryogenic Ball Valve Specification
Size Range
ANSI 150#: 1/2″ – 36″
ANSI 300#: 1/2″ – 36″
ANSI 600#: 1/2″ – 30″
ANSI 900#: 1″ – 30″
Design Standards
Design: BS 6364, MESC SPE 77 200, API 6D, ASME B16.34, GB/T 24925
End Connection: ASME B16.25, B16.5, B16.47
Test: BS 6364, ISO 15848, GB/T 24925
Fire Test: API 607, API 6FA
Nondestructive Testing:
Castings: 100% radiographic (RT) and sealing surface (PT) ultrasonic testing of forgings (UT)
Valve stem: Solution treated + cryogenically treated in liquid nitrogen (-196°C)
Specimen impact testing: Transverse expansion ≥ 0.38mm
Ball: Solution treated + cryogenically treated in liquid nitrogen (-196°C) + surface hardening
Valve seat: PCTFE (ultra-low temperature soft seal), WC/Ni60 (ultra-low temperature hard seal)
Top-Entry Cryogenic Ball Valve for sale
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