Air Release Valve

Aug 21 2019
Ian Mayston


VENT O MAT Series RBX “Anti-Shock” Air Release & Vacuum break valve, Stainless steel Body and Tie Rods, Epoxy coated Ductile Iron ends either Flanged or Screwed

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Air Release Valve 

Air Release valve and Vacuum Break valves. Vent-O-Mat Series RBX “Anti Shock”. The Unique defence against pipe bursts and pipeline system damage. Vent-O-Mat Series RBX has evolved from a long lineage of research and development into a product that has proven unsurpassed for air release, vacuum protection, surge alleviation and pipeline flow enhancement.

The basis of the Vent-O-Mat design is in the understanding of the physical laws that govern air valve and pipeline operation. Reaction to pipeline dynamics is therefore instantaneous and protection provided is relevant to the pipeline’s needs.

Vent-O-Mat Series RBX truly represents the pinnacle of valve design evolution. This valve design provides the most comprehensive, effective and efficient
pipeline protection relative to initial cost of any other available pipeline component.

Key Features:

Automatic Surge Protection
The Unique Series RBX valve incorporates as standard, three design features to automatically protect a pipeline, under all pipeline operating conditions, from the destructive surge and water hammer phenomena. These features are independent of any mechanical devices ensuring reaction in a very low millisecond time span.

Effective Air Release
The RBX design ensures effective de-aeration under all pipeline flow and operating conditions, via either one of three discharge orifices.

Vacuum Protection
The RBX Series large orifice diameters equal the nominal size of the valve. This ensures the least possible resistance to the intake of air and consequently the least possible negative pressure within a draining pipeline. The use of solid, cylindrical floats ensures instantaneous reaction, discourages the “Venturi”phenomenon and is a further guarantee of effective vacuum protection.

Guaranteed Performance
The RBX has been designed and developed to provide the optimum usable and safe performance relative to all functions. Selection data has been substantiated through third party testing and can therefore be confidently referenced.

“SPECVALVE” VENT-O-MAT quality brands and products you can trust.


Additional information


Screwed, Flanged


25, 32, 40, 50, 65, 80, 100