Manual Plastic Diaphragm Valves

Type-14 Flanged Diaphragm Valve (1/2" – 4")

The Type-14 diaphragm valve features improved body to bonnet sealing performance, visual position indication, weir design for excellent throttling capabilities and built in travel stop to prevent over-tightening and eliminate compressive strain. Bubble tight sealing can be achieved even in tough applications containing suspended particles or slurrys.

Asahi's Type-14 diaphragm valve features a layered EPDM/PTFE diaphragm which can accept the addition of a PVDF gas barrier for aggressive chemicals such as Sodium Hypochlorite. These aggressive chemicals produce an off-gas that can permeate the typical laminated PTFE layer and actually become delaminated in this highly corrosive environment leading to a potentially hazardous situation. The Type-14's 3-layer diaphragm which includes the gas barrier layer, prevents this from ever occurring. The Type-14 diaphragm valve body is of 1-piece molded construction and is not fabricated. For maximum corrosion resistance, the Type-14 diaphragm valve's rugged body and bonnet are manufactured of solid thermoplastic materials. The Type-14 diaphragm valve can be pneumatically or electrically actuated.

Resources

Data Sheet

Specificiations

Type-14 Flanged Diaphragm Valve Spefifications

Ideal Applications Include:

Throttling, slurry lines, chemical processing, bleach plants, aquariums, mining, water treatment, landfills, swimming pools, semiconductor manufacturing

Specifications

Sizes:

1/2" – 4"

Body Materials:

PVC, CPVC, PP and PVDF

Bonnet Materials:

PVC, PP, PPG and PVDF

Diaphragms:

EPDM and 3-Layer EPDM/PVDF/PTFE
Also available in Nitrile and FKM

End Connection:

Flanged

Operator:

Handwheel

Features/Benefits

Bubble tight sealing even in applications such as slurries or suspended particles, bonnet seals to protect internals from corrosive environments, built-in travel stop to prevent over-tightening or compressive strain on diaphragm, position indicator at top of valve, PVDF gas barrier (protects EPDM backing from gas permeation) standard on all valve with PTFE diaphragm.

Flanged (ANSI) face-to-face dimensions are equivalent to most commonly used metallic valves
Rugged body and bonnet are of solid thermoplastic for maximum corrosion resistance
Uniquely designed body and bonnet together with diaphragms of new sealing designs by computer dynamic analysis for superior sealing
Weir design for excellent throttling
Bubble-tight sealing, even in applications such as slurries or suspended particles
Bonnet seals to protect internals from corrosive environments
Built-in travel stop to prevent over-tightening or compressive strain on diaphragm
Integrally molded bottom stand for simple yet firm panel mounting
Indicator at the top for indication of valve position and prevention of over-tightening
PVDF gas barrier, which protects EPDM backing from gas permeation, is standard for all valves with PTFE Diaphragm
Low profile
Bayonet structure to connect compressor and diaphragm – easy diaphragm replacement

Actuation

Options

Resources

Online Tools

Welding Parameter Web App