Bermad - Model C50 - Wastewater Combination Air Valve

BERMAD C50 is a high-quality combination air valve for various sewage and wastewater networks and operating conditions. It evacuates air during pipeline filling, allows efficient release of air and gas pockets from pressurized pipes, and enables large volume air intake in the event of network draining. The elongated body and lower float prevent the fluid from contacting the upper mechanism. With its advanced aerodynamic design, double orifice, and Surge Protection device (optional), this valve provides excellent protection against air and gas accumulation and vacuum formation with improved sealing under low-pressure conditions.

Features & Benefits

• Straight flow body with large diameter automatic orifice: Higher than usual airflow
• Aerodynamic, full-body kinetic shield: Prevents premature closing without disturbing air intake or discharge.
• Dynamic Sealing: Prevents leakage under low-pressure conditions (0.8 psi; 0.05 bar).
• Elongated body design: Prevents solids from making contact with the valve’s operating parts.
• Compact, simple, and reliable structure with fully corrosion-resistant internal parts: Lower maintenance and increased life span.
• Two service ports: Enabling back flushing and drainage
• Threaded Side outlet (DN50) for connection of Surge Protection (SP) or Inflow prevention (IP) devices.
• Factory approval and Quality Control: Performance and specification tested and measured with a specialized test bench, including vacuum pressure conditions.

Additional Features & Accessories

• Inflow Prevention (code IP): Prevents intake of atmospheric air in cases where this could lead to damaged pumps, required re-priming, or disruption of siphon.
• Drainage Valve (code Z).

Typical Applications

• Pumping stations: Air relief and vacuum prevention.
• Non-Clean Water pipelines: Protection against air and gas accumulation and vacuum formation at elevations, slope change points, and at road/ river crossings.
• Wastewater Treatment Plants: Air relief, protection against air and gas accumulation, and vacuum formation.

Inlet and Outlet Connection

Inlets:

• Glass-reinforced Nylon Body (C50-P): Male Threaded DN50, Flanged DN80-100.
• Ductile Iron Body (C50-C, C50-J): Male Threaded DN50, Flanged DN80-100.
• Stainless Steel Body (C50-G, C50-N): Male Threaded DN50, Flanged DN80-100.

Outlets:

• Down Outlet - Female Threaded DN50 - Surge Protection (code SP): Smoother operation, preventing damage to the valve and the system.

Materials

Body, Neck and Cover:

• Glass-Reinforced Nylon (C50-P)
• Ductile Iron (C50-C)
• Stainless Steel 316 (C50-N)
• Ductile Iron body with Glass-reinforced Nylon neck and cover (C50-J)
• Stainless Steel 316 body with Glass-reinforced Nylon neck and cover (C50-G)

Upper Float Assembly:

• Polypropylene, Glass-Reinforced Nylon

Lower Float Assembly:

• Polypropylene, Optional – Stainless Steel 316

Float Rod:

• Stainless Steel 316

Elastomers:

• EPDM, NBR. Optional – Viton

Coating of Ductile Iron:

• Fusion Bonded Epoxy

Operational Data

• Minimum operating pressure: 0.8 psi; 0.05 bar
• Maximum operating pressure: 150 psi; 10 bar (C50-P), 230 psi; 16 bar (C50-C, C50-J, C50-G, C50-N).
• 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 the Bermad Air Flow test bench, according to EN-1074/4 standard, and refer to a Side outlet. Use Bermad Air software for optimized Sizing & Positioning of Air Valves.

Cutaway

Dimensions & Weights

* including assembled extension + 90 degrees elbow. For an addition of SP/IP device, add to the Width (D) 2.087"; 53mm

* including assembled extension + 90 degrees elbow. For an addition of SP/IP device, add to the Width (D) 2.087"; 53mm