Air Release Valve series 34 | Cla-Val

Cla-Val Series 34 Air Release Valve

The Cla-Val Series 34 is an automatic air release valve designed for water pipelines. It is installed at high points in piping systems where air accumulation is likely during pressurized operation. The valve continuously expels small volumes of trapped air, preventing the formation of large air pockets that can increase head loss or cause flow instability.

Operation

This valve functions as an air release device under pressure and is not intended as a primary vacuum breaker. Its main application is the continuous venting of air during normal pressurized service. For rapid air intake during pipeline draining or vacuum conditions, a dedicated vacuum breaker or combination air valve should be specified.

Technical Data

• Type: automatic air release valve
• Suitable media: water
• Installation: high points of pipelines
• Function: continuous removal of entrained air
• Internal trim: stainless steel standard
• Available documentation: engineering data sheet, IOM manual

Applications

• potable water distribution networks
• water transmission pipelines
• pumping stations
• locations with frequent air accumulation
• lines requiring mitigation of air binding

Selection Criteria

Valve selection should consider operating pressure, connection size, expected air discharge rate, and hydraulic profile location. For pipelines with vacuum risk, do not use this valve as the sole air management device.

FAQ

Does it admit air under vacuum?
Not as a primary function.

Where is it installed?
At pipeline summits and high points in networks.

What does it reduce?
Air pockets, head loss, and flow fluctuations.