Pneumatic Rubber-Lined Diaphragm Valve (G641J)
Valve Type: Pneumatic Rubber-Lined Diaphragm Valve
Model: G641J
Actuation: Pneumatic, Electric, Manual
Connection Type: Flanged
Structure Type: Weir Type, Roof-Type, Reciprocating
Sealing Type: Rubber-Lined
Pressure Range: 1.6 MPa
Nominal Diameter: DN15 – DN300
Common Materials: Cast Iron, Cast Steel, Stainless Steel
Applications
Widely used for controlling and shutting off corrosive, abrasive, or high-purity fluids in chemical, pharmaceutical, water treatment, and other industrial pipelines. The pneumatic actuation enables automated operation, improving process efficiency and reliability
Working Principle & Features
Working Principle
The pneumatic diaphragm valve consists of a valve body and cover separated by a flexible diaphragm made of rubber or PTFE. When the diaphragm moves up or down, it regulates the flow through the valve, achieving flow control. When the diaphragm presses against the weir surface of the valve body, the flow is completely shut off, closing the valve. Pneumatic diaphragm valves are available in normally open (NO) and normally closed (NC) configurations.
Key Features
Replaceable Diaphragm: Reduces maintenance costs and extends service life.
No Packing Box: Prevents external leakage.
Streamlined Flow Path: Minimizes pressure loss.
Elastic Sealing Element: Ensures zero internal leakage.
Straight-Through Fluid Passage: Reduces fluid resistance and wear.
Valve Body and Cover Isolated by Diaphragm: Protects the valve cover, stem, and other components from media corrosion.
Elastic Rubber Diaphragm: Provides reliable sealing with minimal closing force.
Valve body interior can be lined with various types of rubber to suit different media.
