Butterfly valves in PVC, PP, PVDF and PDCPD produced by Asahi AV are designed to better manage the interception and regulation of the flow in various types of applications, including industrial plants, chemical industry, heavy industry, water treatment, swimming pools and irrigation.

Asahi AV butterfly valves are quality valves, of high durability and easy to manoeuvre and adjust (up to 19 adjustments can be made in the movement of the lever). They are distinguished into manual (with lever and with gear box) and automatic (pneumatic and electric). The mechanical reducer of the Asahi AV valves is also completely made of plastic, another solution against corrosion.

PVC butterfly valves find their greatest use in industrial plants, water treatment plants and swimming pools.

Butterfly valves in PP or homopolymer polypropylene are designed to be used both in the chemical and heavy industry, as well as in large industrial plants.

Thanks to the particular design of the disc, the butterfly valves designed by Asahi AV stand out for: minimum pressure drop, large flow rate, excellent control and regulation of the flow. In addition, the compact dimensions of the valve allow you to save space and therefore maximize space in the design of the system.

Discover below the range of the main ASAHI AV manual butterfly valves.

Type 57 – Manual Butterfly Valve 

Butterfly Valve Type 57 is a quarter-turn valve with equal percentage type flow characteristics that is ideal for chemical processing and wastewater applications. Its spherical symmetric design of the disc allows smooth operation, reduces flow turbulences, and achieves excellent CV values. The massive sealing design overcomes problems that may occur in case of slurry in the media. The valve provides moderate flow control and therefore can be used in both on/off and modulating services. Plastic construction gives the valve superior corrosion resistance.

Body
PVC, PP e PVDF
Lens
PVC, PP, PVDF
Gaskets
EPDM, FKM, FKM-C, FKM-F

Diameters
From DN 40 to DN 200 (with lever)
From DN 40 to DN 350 (with gear box)
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type 57 (Lug)- Manual Butterfly Valve

The Type 57L incorporated a lug function into the design of Butterfly Valve Type 57. The lug style valve has metal threaded inserts at both sides of the valve body and enables easy and uncomplicated maintenance on reservoirs, tanks and pipe systems without extensive emptying and at existing operating pressure. The valve is ideal for water treatment and aquaculture applications.

Body
PDCPD (DIN) and PVC (ANSI)
Lens
PP and PVDF
Gaskets
EPDM, FKM, FKM-C, FKM-F

Diameters
From DN 80 to DN 300
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type 56 – Manual Butterfly Valve

Type 56 valves are quarter-turn valves with equal percentage type flow characteristics. These valves are ideal for chemical processing and wastewater applications and have the advantage of robust construction with a one-piece body and a full-plastic gearbox. Strong sealing on the elastomer seal in both flow directions is ensured. They provide moderate flow control and therefore can be used for both on/off and modulating service.

Body
PP, PVDF
Lens
PP, PVDF
Gaskets
EPDM, FKM, FKM-C, FKM-F

Diameters
DN 400
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type 56D & 75D – Manual Butterfly Valve

Valve body made of PDCPD (polydicyclopentadiene)ensures the valve to withstand higher pressure rating than the standard Type 56 or 75 for all sizes. These valves are intended for shutting down and controlling aggressive or corrosive liquids.

Body
PDCPD
Lens
PP, PVDF
Gaskets
EPDM, FKM, FKM-C, FKM-F

Diameters
DN 400 and DN 600
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type 75 – Manual Butterfly Valve

Type 75 valves are quarter-turn valves with equal percentage type flow characteristics. These valves are ideal for chemical processing and wastewater applications and have the advantage of robust construction with a one-piece body and a full-plastic gearbox. Strong sealing on the elastomer seal in both flow directions is ensured. They provide moderate flow control and therefore can be used for both on/off and modulating service.

Body
PP, PVDF
Lens
PP, PVDF
Gaskets
EPDM, FKM, FKM-C, FKM-F

Diameters
DN 450 and DN 600
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type Rotary Damper – Manual Butterfly Valve

Rotary Damper Valve is specifically designed for ventilation and exhaust systems, not for complete shut-off but for controlling the volume of corrosive fumes. It is perfect for applications as diverse as chemical plant, water treatment facilities, electroplating, gas scrubber systems and laboratories.

Body
PVC, PP, PVDF
Lens
PP, PVDF

Diameters
From DN 40 to DN 600
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type 55IS – Manual Butterfly Valve

Butterfly Valve Type 55IS features an epoxy powder-coated ductile cast iron body with PTFE disc and liner. It is designed for use in applications where extremely aggressive chemicals are used and conventional rubber liners and thermoplastic discs are not suitable, such as chlorination, steel pickling and other chemical processings.

Body
Epoxy powder-coated ductile cast iron
Lens
PTFE
Gaskets
PTFE

Diameters
From DN 50 to DN 250
Connections
Flanged ISO DIN PN10 or ANSI 150 lb

Type Big Diameter – Manual Butterfly Valve

Body
PDCPD
Lens
PDCPD
Gaskets
EPDM

Diameters
From DN 700 to DN 1200
Connections
Flanged ISO DIN PN10 or ANSI 150 lb