Pneumatic valve

The high-performance clamp pneumatic stainless steel butterfly valve is equipped with a pneumatic actuator control switch, which can be equipped with a positioner to adjust the valve proportionally (4-20mA), as well as pneumatic solenoid valves, air filter pressure reducing valves, and limit switches. Belonging to pneumatic operated valves,气动不锈钢高性能双偏心对夹蝶阀是针对现代工业流体控制需求的高效调节装置，该阀门采用双偏心几何结构设计，第一偏心使阀板旋转中心偏离管道中心线，第二偏心使阀板密封面偏离阀座接触平面。该设计使阀板在开启瞬间与阀座快速脱离，闭合过程中形成渐进式压紧密封，较传统中线蝶阀减少85%以上的摩擦行程。

Its design integrates mechanical dynamics optimization and material engineering innovation, and has wide application value in fields such as food processing, biopharmaceuticals, and fine chemicals that require strict hygiene levels, sealing performance, and operational efficiency.

‌结构与运行原理‌
The clamp type flange complies with the GB/T 9113 standard, and is combined with precision machined 316L stainless steel valve body and DN50-DN1200 specification valve plate to achieve uniform distribution of axial load, suitable for various pressure grade pipeline systems such as ANSI 150LB/DIN PN16.

‌材料与性能参数‌
The valve body, valve plate, and valve stem are all made of ASTM A182 standard stainless steel material, with a surface treated by electrolytic polishing (Ra ≤ 0.4 μ m), in compliance with FDA 21 CFR 177.2600 food contact material specifications. The double eccentric sealing pair adopts a hardened stainless steel substrate and a multi-layer composite graphite gasket structure, with a temperature resistance range extended to -50 ℃~425 ℃ and a maximum working pressure of PN40. According to the ISO 5208 standard test, the bidirectional sealing leakage rate is ≤ 5 × 10 ^ -6 mL/s · m, meeting the Class VI sealing requirements. The pneumatic actuator is compatible with ISO 5211 installation interface, with torque output covering 120-6000N · m, full stroke action time ≤ 1.2 seconds, and repeat positioning accuracy ± 0.3 °.

‌气动控制系统特性‌
The configured modular pneumatic actuator adopts a die cast aluminum alloy shell with a protection level of IP68, and is equipped with a low friction coefficient piston ring and a magnetic coupling position sensor. Support gas source pressure of 0.4-0.7MPa, optional intelligent locator for 4-20mA/Profinet signal control, flow characteristics can be adjusted to linear or equal percentage. The explosion-proof configuration has passed ATEX II 2G Ex d IIC T4 certification and is suitable for Class IIA/IIB explosive gas environments. The actuator is equipped with an emergency manual wheel device as standard, which can achieve valve position locking or manual adjustment in case of gas and power outages.

‌制造与适配场景‌
The valve body channel is formed in one go using a five axis CNC machining center, ensuring precise matching between the flow direction of the medium and the rotation trajectory of the butterfly plate. The flow resistance coefficient Kv value is increased by 30% compared to conventional products. Suitable for high-temperature steam sterilization (with a maximum resistance to instantaneous steam shock of 160 ℃), CIP/SIP cleaning systems, and high viscosity medium transportation scenarios.