DZ61W American Standard Cryogenic Welded Gate Valve Features
1. Strict Compliance with API Standards: Design and manufacturing conform to specifications such as ANSI B16.34, API 600, and API 602. Inspection and testing comply with API 598 standards, ensuring valve reliability and interchangeability under cryogenic operating conditions.
2. Permanent Sealing with Welded Connection: Featuring socket weld or butt weld connections that integrate the valve with the pipeline, this design completely eliminates the risk of leakage at connection points. It is ideal for cryogenic systems where leakage is not permitted.
3. Cryogenic Treatment and Low-Temperature Materials: The chemical composition and low-temperature impact toughness of materials are strictly controlled. Components undergo deep cryogenic treatment to relieve stress, ensuring toughness and dimensional stability at -196°C, preventing brittle fracture and leakage due to deformation.
4. Extended Bonnet Anti-Freezing Design: The bonnet length is determined based on the valve's operating temperature, effectively lengthening the path for cold conduction. This ensures the stuffing box remains in a higher temperature zone, preventing the packing from freezing and the valve stem from seizing.
5. Cavity Pressure Relief Safety Structure: To prevent abnormal pressure rise in the valve cavity, a pressure relief hole is provided on the inlet side of the gate. This effectively avoids the risk of body damage caused by medium vaporization and expansion, enhancing valve safety.
6. Low Fluid Resistance and Wide Applicability: The medium flow direction is unrestricted, with no flow disturbance or pressure drop, resulting in low fluid resistance and minimal erosion of the sealing surfaces. It is suitable for a wide range of cryogenic media, including methane, ethane, propane, liquid ammonia, liquid oxygen, liquid nitrogen, and liquefied natural gas.