A Comprehensive Guide to Diaphragm Technology in Pneumatic Diaphragm Valves

一、Core Functions and Features

1. Core role

   • As the core sealing and drive component of pneumatic diaphragm valves,The diaphragm directly controls the flow of the medium through pneumatic pressure deformation, achieving zero-leakage sealing (leakage rating up to ANSI Class VI).

   • Dual roles: It serves as both a dynamic seal and a pressure transmission element.

   
   

2. Key Performance Parameters

   ? Pressure Rating: 0.1 to 1.6 MPa (Special designs available up to 2.5 MPa)   ? Temperature Adaptability: -40°C to 180°C (depending on material)   ? Cycle life: 500,000 to 2,000,000 cycles (requires optimized valve body design)   

   
   

二、Mainstream Diaphragm Types and Selection Guide

Golden Rules for Model Selection:

• Chemical compatibility takes precedence: Refer to the Chemical Corrosion Handbook for material selection.

• Dynamic Operating Condition Compensation: For frequent opening and closing, high-elasticity materials (such as fluororubber) should be selected.

Model Selection Recommendations