Bermad - Model C30C - Combination Air Valve

The BERMAD C30C is a high-quality combination air valve, designed for a variety of irrigation water networks and operating conditions.

It evacuates air during pipeline filling, allows efficient release of air pockets from pressurized pipes, and enables large volume air intake in the event of network draining.

With its advanced aerodynamic design, this double orifice valve provides excellent protection against air accumulation and prevents vacuum formation, with improved sealing in low-pressure conditions (less than 1m).

The valve is a plastic shell body valve with a Ductile Iron outer shell cover, offering the security of a metal body.

Features & Benefits

• Straight flow body with large diameter automatic orifice: Higher than usual flow rates.
• Aerodynamic full-body kinetic shield: Prevents premature closing, without disturbing air intake or discharge
• Dynamic sealing: Prevents leakage under low-pressure conditions (1.5 psi; 0.1 bar)
• The boss on the base can be tapped with a thread for pressure gauge connection, checkpoint, or test drain for air valve function.
• Threaded Side outlet (DN50) for connection of Surge Protection (code SP) or Inflow prevention (code IP) devices.
• Compact, simple, and reliable structure with fully corrosion-resistant internal parts; lower maintenance and increased life span
• Design in compliance with functional standards and water service standards.
• Factory approval and Quality Control: Performance and specification tested and measured with a specialized test bench, including vacuum pressure conditions.

Additional Features & Accessories

• Surge Protection (code SP) device: Smoother operation, preventing damage to the valve and the system.
• Inflow Prevention (code IP) device: Prevents intake of atmospheric air in cases where this could lead to damaged pumps, required re-priming, or disruption of siphons.
• Assisted Closing - the kinetic orifice is set to be partially closed (code AC) for controlled slow air relief, subsequently avoiding the possibility of a surge event during pipeline filling or column separation
• Service Ports fitted: ¼” plug (code P) for pressure gauge connection, checkpoint, or test drain for air valve function.

Typical Applications

• Pipelines: Protection against air accumulation and vacuum formation at elevations, slope change points and road/ river crossings
• Water networks: Protection against air accumulation and vacuum formation.
• In proximity to control valves and water meters: Prevention of inaccurate pressure regulation and biased readings due to air existence in these devices.

Inlet and Outlet Connection

Inlet: Male Threaded DN50.

Outlet: Side Outlet DN50 Female Threaded.

Materials

Body:

• Ductile Iron (code C30C), coated with Fusion Bonded Epoxy.

Float Assembly:

• Polypropylene, Glass Reinforced Nylon.

Elastomers:

• EPDM, Optional - Viton.

Operational Data

• Minimum operating pressure: 1.5 psi; 0.1 bar
• Maximum operating pressure: 230 psi; 16 bar
• Media and operating temperature: Water 1-60°C.

Orifice Specifications

Air Flow Performance Charts

Air Relief and Intake (Pipeline Filling, Draining and Vacuum Conditions)

Air Release (Pressurized Operation)

Air relief and intake charts are based on actual measurements, measured in Bermad Air Flow test bench, according to EN-1074/4 standard and refer to Side outlet. Use Bermad Air software for optimized Sizing & Positioning of Air Valves.

Cutaway

Dimensions & Weights