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Dual Air Release Valves

The Air Release Valve Range

The Dual Air Release Valves have all been designed to function under the harsh conditions of mining and mineral processing, these valves all come with the Dual stamp of approval. All valves are manufactured and tested to ISO 5208. We pride ourselves in being the leader in the valve slurry industry.

What Makes the Air Release Valve Unique?

The Dual Vacuum Release and Vacuum Breaker’s function is to automatically exhaust large volumes of air from the system when it is being filled and also to allow air to re-enter the pipeline when being emptied. The Orifice size is generally the same size as the pipeline inlet. 

What Pressure Can the Air Release Valves Take?

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We have constructed valves that have been built to a working pressure of 10 Bar up to 160 Bar.

Valve Linings

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The Air Release Valve housing can be epoxy coated or natural rubber lined. A range of elastomer grades are available for corrosive duties.

Flange Drilling

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Dual can construct the valve to match any Face to Face required and any flange drilling. Please enquire with our sales team for more information.

DARV - Dual Air Release Valve

Tri-functional air valve that not only breaks vacuum, but also reduces surge on pipeline filling and releases air under operating conditions.

DSARV - Dual Slurry Air Release Valve

Automatically releases air from the pipeline when filled and stops air from entering the pipeline when emptied.

Other Services

Valve Repairs

Dual Valves can repair valves that have been damaged due to wear and tear from usuage on slurry and other lines.



Dual Valves can be fitted with various different types of actuators, Hydraulic, Pneumatic and Electric.


Sandblast & Paint Spec

We use shotblast, 2.5 grit on all Dual valves and a 2 stage Epoxy coate to ensure the best quality and longevity on site.


Head Office

166 Rotterdam Road, Apex Industrial, Benoni, Gauteng, South Africa

Call Us

(+27) 11 422-4326/7