Diaphragm valves in PVC, PP, PVDF and PVC-C produced by Asahi AV are successfully used in various applications, thanks to the great variety of thermoplastic materials and elastomers with which they are produced.

The main gaskets available are in EPDM, FKM, PTFE and PTFE + PVDF. Only Asahi AV uses PTFE + PVDF (cushion cover) gaskets which allow a perfect seal of the fluid and its evaporations. Essential solutions in highly corrosive environments.

Diaphragm valves in PVC are excellent valves for regulating the flow and are mainly used in industrial sectors, where regulation is extremely important.

Diaphragm valves are suitable for numerous applications, in any sector. The great advantage consists, among other things, in the fact that only the membrane and the valve body come into contact with the fluid.

The wide choice of materials also makes it suitable for aggressive, abrasive or highly viscous fluids that are frequently used in chemical and environmental engineering, as well as in the processing industry. This type of valve is also widely used in water treatment.

Discover below the range of the main ASAHI AV manual diaphragm valves and automatic diaphragm valves.

Manual Diaphragm Valves in PVC, PVC-C, PPH and PVDF

Type 14 – Manual Diaphragm Valves

Diaphragm Valve Type 14 made of solid thermoplastic materials for maximum corrosion resistance has a one-piece moulded construction body without production joints for spigot or flange and increases safety and durability to the maximum level. It features excellent body-to-bonnet sealing performance, weir design for excellent throttling capabilities, and built-in travel stop to prevent overtightening and eliminate compressive strain. Bubble-tight sealing can be achieved even in tough applications. True union design for socket, threaded, and spigot connections is available up to DN50.

Body
PVC-U, PVC-C, PP and PVDF
Diaphragm
EPDM, FKM, PTFE, PTFE+PVDF

Diameters
From DN 15 to DN 100
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type 14 True union – Manual Diaphragm Valves

The True union Type 14 diaphragm valve is identical to the Type 14 valve (see above) with sockets or threaded connections.

Body
PVC-U, PVC-C, PP and PVDF
Diaphragm
EPDM, FKM, PTFE, PTFE+PVDF

Diameters
From DN 15 to DN 50
Connections
Socket, Threaded

Type 15 – Manual Diaphragm Valves

ASAHI AV Type 15 diaphragm valves are a multi-turn valve, good for flow control and use with viscous/slurry lines due to their high resistance to clogging. These valves have a uniquely designed body and bonnet, as well as a diaphragm with new sealing designs. Type 15 diaphragm valves shall be of solid thermoplastic construction for body and bonnet with moulded flanged ends.

Body
PVC-U, PP and PVDF
Diaphragm
EPDM, FKM, PTFE, PTFE+PVDF

Diameters
From DN 125 to DN 150
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type 72 – Manual Diaphragm Valves

ASAHI AV Type 72 diaphragm valves are a multi-turn valve, good for flow control and use with viscous/slurry lines due to their high resistance to clogging. These valves have a uniquely designed body and bonnet, as well as a diaphragm with new sealing designs. Type 72 diaphragm valves shall be of solid thermoplastic construction for body and bonnet with moulded flanged ends.

Body
PVC-U, PP and PVDF
Diaphragm
EPDM, FKM, PTFE, PTFE+PVDF

Diameters
From DN 200 to DN 250
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Automatic Diaphragm Valves in PVC, PVC-C, PPH and PVDF with Pneumatic actuator

Type 14 AN – Automatic Diaphragm Valves with Pneumatic actuator

Body
PVC-U, PVC-C, PP and PVDF
Diaphragm
EPDM, FKM, PTFE, PTFE+PVDF

Diameters
From DN 15 to DN 100
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type 14 AN True Union – Automatic Diaphragm Valves with Pneumatic actuator

Body
PVC-U, PVC-C, PP and PVDF
Diaphragm
EPDM, FKM, PTFE, PTFE+PVDF

Diameters
From DN 15 to DN 50
Connections
Socket, Threaded

Type 14 AI – Automatic Diaphragm Valves with Pneumatic actuator

Body
PVC-U, PVC-C, PP and PVDF
Diaphragm
EPDM, FKM, PTFE, PTFE+PVDF

Diameters
From DN 15 to DN 100
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type 14 AI True Union – Automatic Diaphragm Valves with Pneumatic actuator

Body
PVC-U, PVC-C, PP and PVDF
Diaphragm
EPDM, FKM, PTFE, PTFE+PVDF

Diameters
From DN 15 to DN 50
Connections
Socket, Threaded