Material: Rubber composite with fabric-reinforced fiber skeleton, typically molded and vulcanized from nitrile rubber (NBR), ethylene propylene diene monomer (EPDM), or fluoroelastomer. High-strength fabric reinforcement enhances tensile strength and resistance to reciprocating fatigue.

Technical Specifications:

Pressure: 0～0.8MPa (standard instrument air supply operating pressure)

Temperature: -40℃ to 120℃

Chemical Compatibility: Suitable for clean gas sources such as dry compressed air and instrument nitrogen; resistant to mild oil, vapor, and water corrosion.

Product Features: Ring flange with mounting bolt holes; pleated bellows design for large stroke and over 10,000 flex cycles without tearing; reinforced fabric structure ensures stable deformation and uniform rebound, precisely converting air pressure into stem thrust; tight edge sealing prevents leaks to guarantee control valve stroke accuracy. A core wear-prone component of Fisher diaphragm actuators, designed for easy installation and replacement.

Applications: Paired with imported control valve actuators; widely used in chemical, petroleum, power generation, and water treatment industries for automatic flow, pressure, and level regulation in process control systems.