401 Series 2/2 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 or Carbon Steel  
Lower Valve Seat Flange: Stainless Steel or Carbon Steel with Stainless Steel combination welded valve seat  
Valve Stem: SS403 Hard Chrome Plated

Working Principle

Thesepiston valves operate using air pressure, with a spring for

single-direction reset, functioning as a two-way valve for opening

and closing. They offer two types of 2-way valves: normally open (NO),

where port 1-2 is open when the air supply is closed, and normally closed (NC),

where port 1-2 is closed when the air supply is closed.

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.