402 3/2 Way Pneumatic Threaded Piston Valve

Design Specifications:

Fluids: Steam, Gas, Hot Water, Cold Water  
Maximum Operating Pressure: 3.2 MPa*1  
Maximum Operating Temperature: 205°C (Special option: 240°C)  
Control Air Supply Pressure: 0.25 to 0.35 MPa  
Control Air Supply Port: Rc1/4, NPT1/4, G1/4  
Connection Method: Threaded Connection (RC, NPT), Flange Connection (JIS 20K, ASME Class 300, DIN PN40)  
Valve Body: Stainless Steel  
Flange: Stainless Steel orCarbon Steel  
Lower Valve Seat Flange: Stainless Steel or  Carbon Steel with Stainless Steel combination welded valve seat  
Valve Stem: SS Hard Chrome Plated

Working Principle

The operation principle of these cutoff valves involves being driven

by air pressure, with a spring for single-direction reset, functioning

as three-way valves with a pathway switching feature. When the air

supply is closed, port 1-2 pathway closes, and port 2-3 pathway

opens. When the air supply is open, port 1-2 pathway opens,

and port 2-3 pathway closes.

In high-temperature, high-pressure environments like tire

vulcanization machines, specialized sealing rings (carbon fiber PTFE) are

used on the valve stem connecting to the valve body and seat, ensuring

long-lasting high-quality sealing. Their design also facilitates maintenance,

such as disassembly and assembly for part replacement. These valves are

suitable for both internal and external pressure systems, hydraulic systems,

and pneumatic systems in tire vulcanization machines.