Designed to protect pipelines and vertical turbine pump applications from air lock and vacuum collapse, the Cla-Val Model 33A High-Performance Combination Air Release & Vacuum Breaker Valve eliminates air and prevents vacuum formations in waterworks piping systems. A large venting orifice and large float clearances freely exhaust or admit air during pipeline filling or draining.
High-Performance Air Release & Vacuum Breaker Valve type 33A | Cla-Val
Cla-Val 33A Air Release & Vacuum Breaker
The Cla-Val 33A is a combination air release and vacuum breaker valve designed for water distribution networks and vertical turbine pump installations. It expels air during pipeline filling, releases pressurized air during operation, and admits air during draining, minimizing air lock and vacuum-induced pipeline collapse.
Technical Specifications
- Type: Combination air release & vacuum breaker, high-performance
- Body: Ductile iron ASTM A536
- Connection: NPT or flanged
- Standard: ANSI
- Pressure classes: 150 lbs / 300 lbs
- Large air discharge orifice
- Enhanced float tolerances for unrestricted air intake/discharge
Applications
- Potable water networks
- Water transmission pipelines
- Pumping stations with vertical turbine pumps
- Pipeline high points
- Filling and draining lines
Difference from Cla-Val 33VB
The 33VB functions primarily as a vacuum breaker. The 33A combines vacuum breaking with air release, making it suitable where both vacuum protection and continuous air management are required during normal operation.
FAQ
What does it prevent?
Air lock, negative pressure, and potential mechanical stress on pipelines.
Where is it installed?
At pipeline high points, pump stations, and lines subject to filling/draining cycles.
What is considered during selection?
ANSI class, DN, air flow rate, hydraulic profile, and draining scenarios.
Datasheet and documents
Description
Certificates
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