BERMAD Waterworks Air Valves Series Sewage & Wastewater Combination Air Valve Model C50 BERMAD C50 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 large volume air intake in the event of network draining. With its advanced aerodynamic design and double orifice, this valve provides excellent protection against air and gas accumulation and vacuum formation with improved sealing under low pressure conditions. Typical Applications Sewage and wastewater pumping stations – Air relief and vacuum prevention. Sewage and wastewater 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. 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 (0.05 bar). Elongated body design – Prevents solids from making contact with valve’s operating parts. Compact, simple and reliable structure with fully corrosion-resistant parts – Lower maintenance and increased life span. Two inlets – Enabling back flushing and drainage. Factory approval and Quality Control – Performance and specification tested and measured with specialized test bench, including vacuum pressure conditions. Additional Features Surge Protection (anti-slam) – Smoother operation, preventing damage to the valve and the system (C50-SP). Inflow Prevention – Prevents intake of atmospheric air in cases where this could lead to damaged pumps, required re-priming, or disruption of siphons (C50-IP). Drainage Valve. Threaded Side outlet (DN50/2") for connection of S

Air Valves Series Principles of Operation Pipeline filling: During the filling process of a pipeline, high air flow is forced out through the kinetic orifice of the air valve. Once water enters the valve's chamber, the float buoyed upwards causes the kinetic orifice to close. The unique aerodynamic structure of the valve body and float ensures that the float cannot be closed before water reaches the valve. Pressurized Operation: During pressurized operation of the pipeline, air accumulates in the upper part of the air valve chamber, causing the float to gravitate downwards. This in turn causes...

BERMAD Waterworks Air Valves Series Air Flow Performance Charts Air Relief and Intake (Pipeline Filling, Draining and Vacuum Conditions) Air Release (Pressurized Operation) Air Flow (normal meter per hour - nm^3/h) Air Flow (normal meter per hour - nm^ /h) Air relief and intake charts are based on actual measurements, made during 2015 in Bermad Air Flow test bench, according to EN-1074/4 standard and refer to Side outlet. Female Threaded for retrofitting Surge Protection (SP) or Inflow Insect Screen Prevention (IP) functions or drain lines Kinetic Orifice Automatic Orifice Kinetic Plug Top Float...

Air Valves Series Parts List and Materials [email protected] • www.bermad.com © Copyright 2007-2012 Bermad CS Ltd. All Rights Reserved. The information contained in this document is subject to change without notice. BERMAD shall not be liable for any errors contained herein. PCASE11-C50 June 2015