Wear Resistant Sealed Cryogenic ball valve

Wear-Resistant Sealed Cryogenic Ball Valve is an industrial control valve specifically designed for low-temperature, particulate-laden media. It integrates low-temperature-resistant materials, reinforced wear-resistant structures, and precision sealing technology, making it suitable for cold chain, chemical, and air separation industries. It ensures reliable flow control and sealing under low-temperature conditions, with core advantages including resistance to low-temperature impact, erosion from particulates, and zero-leakage sealing. It effectively addresses common issues in low-temperature environments, such as valve wear, seal failure, and operational sticking.

Structural design focuses on low-temperature adaptability and wear-resistant sealing:
The valve body is made from 304L/316L ultra-low carbon stainless steel or Monel 400, processed with –196 °C cryogenic aging and stress-relief treatments to eliminate internal stresses and prevent brittle fracture or deformation at low temperatures. The ball is solid-forged and solution-treated, with a surface coated by supersonic flame spraying of WC-Co (tungsten carbide–cobalt) wear-resistant material (thickness 0.6–1.0 mm, hardness ≥ HRC65), achieving a coating bond strength ≥ 70 MPa to resist long-term erosion from particulate media with particle sizes ≤ 5 mm.

The sealing system uses a dual structure of “low-temperature elastic seal + metal backup.” Seats are made of PCTFE (polychlorotrifluoroethylene) or glass-fiber-reinforced PTFE, combined with Inconel alloy spring preloading to automatically compensate for thermal contraction and wear. Leakage meets ANSI B16.104 Class VI standards. The stem is made of 2Cr13 stainless steel with nitriding treatment, combined with dual sealing using flexible graphite and braided metal packing, ensuring zero leakage in low-temperature environments. Actuation options include manual, electric (low-temperature explosion-proof), and pneumatic drives, suitable for various control requirements.

Key technical parameters:

• Nominal sizes: DN15–DN300 (1/2"–12")

• Pressure ratings: PN10–PN250 (Class 150–1500 LB)

• Operating temperature range: –196 °C to –40 °C (suitable for liquid nitrogen, LNG, etc.), with special materials extending to –253 °C for liquid hydrogen service

• Wear resistance: Meets ASTM G65-04 standard, 4–5 times more erosion-resistant than conventional low-temperature ball valves

• Connections: Flanged (ASME B16.5, GB/T 9113) and butt-welded; sealing surfaces support RF and RTJ types

Manufacturing and testing strictly follow API 6D, ASME B16.34, and GB/T 24925 (low-temperature valve standard), including cryogenic impact tests, sealing performance tests, erosion resistance tests, and non-destructive examinations (UT/RT).

Performance advantages:

1. Excellent low-temperature adaptability – cryogenic-treated materials and optimized structure ensure smooth operation without sticking or deformation.

2. Durable wear-resistant sealing – hard alloy coating combined with low-temperature-specific sealing materials significantly extends service life.

3. High safety and reliability – zero-leakage design prevents deep cryogenic media leaks, reducing operational risks.

Applications: Suitable for LNG storage and transport, air separation liquid oxygen/liquid nitrogen systems, and cryogenic chemical reactions. Typical installations include LNG receiving stations, air separation units, low-temperature chemical reactors, and liquid nitrogen pipelines in low-temperature environments.