Bermad - Model C80 - Sewage and Waste Water Combination Air Valve

BERMAD C80 is a high-quality combination air valve for a variety of 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 the intake of large volumes of air in the event of network draining. The elongated - body and lower float - is designed to reduce the contact between the fluid and 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. C80 is designed to facilitate longer periods of operation without maintenance and it is easy to maintain.

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 (3"; DN80) for connection of Surge Protection (SP) or Inflow prevention (IP) devices.
• Certified to the Australian functional standard for air valves (SAI AS4883).
• 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): Smoother operation, preventing damage to the valve and the system.
• 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 road/river crossings.
• Wastewater Treatment Plants: Air relief, protection against air and gas accumulation, and vacuum formation.

Inlet and Outlet Connections

• Inlets: flanged 3-4"; DN80-100
• Outlets: Sideways or down, female threaded 3”; DN80

Materials

• Body and Cover: Ductile Iron
• Top Plate: Stainless Steel 316
• Upper Float Assembly: Polypropylene, Glass-Reinforced Nylon
• Main Float: Stainless Steel 316, tested to 800 psi; 55 bar
• Float Rod: Stainless Steel 316
• Elastomers: NBR, Neoprene
• Coating of Ductile Iron: Fusion Bonded Epoxy

Operational Data

• Pressure Rating: 230 psi; ISO PN16, 360 psi; ISO PN25
• Minimum operating pressure: 0.8 psi; 0.05 bar
• Maximum operating pressure: 230 psi; 16 bar, 360 psi; 25 bar
• Media and operating temperature: Water, 33-140°F; 1-60°C

Maintenance

• The air valve can be opened from the top and the internal assembly can be pulled up, for a quick service or replacement.
• 2 Service ports and the addition of an optional drainage valve enable back-flushing, testing, and draining in the workshop as well as in the field.

Orifice Specifications

Air Flow Performance Charts

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

Air Release (Pressurized Operation)

Data for C80 with Surge Protection Feature

Cutaway

Dimensions and Weights