Pneumatic valve

The four-way structure supports flexible switching of medium flow direction, achieving "T-shaped" or "L-shaped" channel switching through 90 ° rotation of the sphere, meeting the multi working condition requirements of complex pipeline systems, and reducing equipment redundancy configuration.Pneumatic four-way reversing flange ball valve, made of stainless steel material, balancing strength and corrosion resistance,The four-way structure supports flexible switching of medium flow direction, achieving "T-shaped" or "L-shaped" and "double L-shaped" channel switching through 90 ° rotation of the sphere, following GB (national standard) and ANSI (American standard) flange connection standards, with optional RF, FF and other sealing surface structures, pneumatic actuator (single/dual function), response time ≤ 2 seconds, supporting 4-7 bar gas source pressure, and remote signal control;Suitable for flow switching and cutoff control of water, steam, oil, and weakly corrosive media.

1. 材质与工艺‌
The valve body, valve cover, and ball body are made of 304/316 stainless steel material, which is precision cast and CNC machined into shape. The surface finish reaches Ra0.8 μ m, and it can withstand working temperatures of -29 ℃~200 ℃ and pressure levels of PN16~PN40. It is not easy to deform or leak after long-term use.

2. 标准化适配‌
Strictly following the GB (National Standard) and ANSI (American Standard) flange connection standards, the sealing surface can choose RF, FF and other structures, and the flange hole spacing and diameter are compatible with mainstream pipeline systems, reducing installation and maintenance costs.

3 气动执行控制‌
Equipped with high-precision pneumatic actuators (single/double acting), response time ≤ 2 seconds, supporting 4-7 bar air source pressure, remote signal control, suitable for manual/automatic switching needs in automated production lines and high-risk environments.

‌适用场景‌
Widely used in industries such as chemical, energy, food processing, water treatment, etc., fluid distribution systems are particularly suitable for working conditions that require frequent flow direction switching or strict control of medium pollution.

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The selection should be based on the actual working conditions, and comprehensively evaluated from multiple dimensions such as medium characteristics, operating environment, and control accuracy to ensure the compatibility and stability of the valve and system.

‌1. 介质适配性分析‌

• ‌介质类型‌It is necessary to clarify the fluid properties (such as liquids, gases, corrosive media, etc.) and prioritize selecting materials compatible with the media (such as 316L stainless steel for strong corrosion resistance and 304 stainless steel for conventional working conditions).
• ‌洁净度要求‌It is recommended to use mirror polished valve bodies in the food and pharmaceutical industries to avoid residual media; For fluids containing particles, it is necessary to confirm whether the valve flow channel structure has anti clogging design.

‌2. 压力与温度参数‌

• ‌工作压力‌Select the valve body pressure rating based on the maximum system pressure (such as PN16/ANSI 150), and it is recommended to reserve a 20% safety margin.
• ‌温度范围‌Conventional stainless steel valves are suitable for temperatures ranging from -29 ℃ to 200 ℃. Special sealing materials (such as PTFE modified or metal hard seals) are required for ultra-high temperature or cryogenic conditions.

‌3. 法兰连接标准‌

• ‌国标（GB）与美标（ANSI）差异‌Match the existing pipeline flange specifications (such as the difference in sealing surface between GB/T 9119 flat flange and ANSI RF raised flange) to avoid installation interference.
• ‌密封面形式‌RF (convex), FF (full plane) and other structures need to be selected according to the type of sealing gasket.

‌4. 气动执行器配置‌

• ‌单/双作用选择‌Double acting actuators are suitable for scenarios that require bidirectional stable driving; Single acting actuators rely on spring reset and are suitable for emergency shutdown needs due to gas loss.
• ‌气源压力与响应速度‌The regular gas source pressure is 4-7 bar, and it is necessary to confirm whether the actuator torque meets the valve opening and closing requirements (excessive torque may damage the valve stem).

‌5. 控制与信号反馈‌

• ‌自动化要求‌It is necessary to clarify whether the PLC/DCS system needs to be connected, matched with solenoid valve voltage (24V DC/220V AC) and signal feedback type (such as switch quantity, 4-20mA).
• ‌防爆与防腐需求‌It is recommended to choose explosion-proof certification (Ex d IIC T6) or aluminum alloy anti-corrosion coating actuators for chemical and oil and gas scenarios.

‌6. 附加功能优化‌

• ‌手动应急装置‌It is recommended to install manual wheels or operating mechanisms for high-risk working conditions to ensure emergency intervention in case of power and gas outages.
• ‌流量特性匹配‌In high flow rate scenarios, it is necessary to verify whether the Cv value of the valve body flow channel meets the accuracy requirements for flow regulation.