trend

In short, the core of bellows sealing is the use of flexible thin-walled metal tubes (bellows) that can expand and contract, completely and permanently isolating the valve stem from the process medium.

Marine atmospheric corrosion: When exposed to high temperature, high salt, and high humidity marine atmosphere, the exterior of the valve also needs good anti-corrosion measures.

If the air drying system of the factory (such as freeze dryer, desiccant dryer) is inefficient or malfunctions, a large amount of liquid water and water vapor may enter the pneumatic system.

Hygiene level: Do you need to comply with international hygiene standards such as 3-A, FDA, EHEDG, etc? This directly affects surface smoothness, design, and materials.

Meaning: The maximum non impact working pressure that a valve can withstand at a specified temperature (usually ambient temperature, such as 20 ° C).