Dual Air Release Valve ( DARV )

Dual Air Release Valve (DARV)
Dual’s Air Release Valve offers a tri-functional air valve that not only breaks vacuum, but also reduces surge on pipeline filling and releases air under operating conditions. Dual’s vacuum break valves should be located on the apex of a pipeline to allow air to enter if the pipe ruptures or a scour valve is opened.
DARV Features
Triple function.
Light weight.
Non slam.
Cost effective.
No sticking.
Small orifice to bleed air.
Controlled velocity.
Anti shock function.
No blocking or leakage.
No sticking of the floats.
EPDM ‘O’ Ring for positive seal.
The solid float will not deform under pressure.
The cylindrical design also increases the effectiveness of the valve’s operation during vacuum conditions.
SIZE RANGE: |
25mm through to 200mm. Larger sizes on request. |
OPERATING TEMPERATURES: |
Operating temperatures to 80˚C. Higher conditions are possible if the valve is constructed from suitable materials. |
VALVE BODY: |
Stainless Steel (304 or 316). |
PRESSURE RATING: |
Working Pressure Standards are PN 10, PN 16, PN 25 and PN 40. |
BARREL: |
304 Stainless Steel. |
FLANGES: |
Mild Steel, FBE Coated or Threaded (BSP). |
FLOATS: |
Guided HDPE. |
SCREEN AND COVER PLATE: |
304 Stainless Steel. |
SEALS AND O RINGS: |
EPDM. |
DRILLING PATTERNS: |
ANSI B16.5, DIN, Screwed, SABS & BS Optional. |
MATERIAL CERTIFICATION: |
Certified chemical and physical test reports can be supplied. |
Head Office
166 Rotterdam Road, Apex Industrial, Benoni, Gauteng, South Africa
Call Us
(+27) 11 422 – 4326/7