Fire Protection System Air Release Valve Series 34 | Cla-Val

Cla-Val Series 34 for Fire Protection Networks

The Cla-Val Series 34 is an automatic air release valve designed for water-based fire protection piping systems. It is installed at high points in pipelines where air accumulation is likely during filling or pressurized operation.

Operation

This valve continuously releases small volumes of trapped air before large air pockets can form, reducing air binding, localized head loss, and unstable hydraulic response during demand events. The Series 34 is not intended as a primary vacuum breaker; separate devices are required for negative pressure protection.

Technical Data

• Type: Automatic air release valve
• Suitable media: Fire protection water
• Installation: High points of pipework
• Function: Continuous air evacuation under pressure
• Internal trim: Stainless steel
• Documentation: Engineering Data Sheet (US and Metric Units)

Applications

• Sprinkler and hydrant networks
• Fire pump stations
• Fire protection ring mains
• Elevated sections of horizontal pipelines
• Piping with potential for air accumulation

FAQ

When is this valve selected?
When removal of trapped air is required in pressurized fire protection lines.

Does it admit air during drainage?
Not as a primary function.

What selection criteria apply?
Operating pressure, connection type, installation location, and fire system requirements must be considered.