Air relief valve C75

vacuumfor water systemsfor pipelines

Product overview
BERMAD C75-C is a combination air valve for water transmission and distribution networks. It evacuates air during filling, releases entrapped air pockets from pressurized pipes and admits large air volumes during draining. The aerodynamic double-orifice design together with an integrated Anti‑slam (slow closing) surge protection optimizes air‑water separation, reduces water spray during air release and ensures improved sealing at low pressures.

Features & Benefits

• Straight-flow body for higher than usual flow rates.
• Dynamic sealing effective down to 1.5 psi (0.1 bar) to prevent leakage at low pressure.
• Patented 2-step automatic orifice to minimize water spraying during air release and extend operation periods.
• Double-orifice arrangement for combined large-volume discharge and small continuous air release.
• Integrated surge protection (Anti‑slam / slow closing) to mitigate transient effects.
• Three optional outlet configurations (sideways, downwards, circular mushroom) swivel 360° for flexible site installation.
• Compact, robust construction with fully corrosion-resistant internal parts for reduced maintenance and longer service life.
• Factory-tested on specialized benches including vacuum conditions for quality assurance.
• Certified to functional and drinking water standards for network use.

Typical Applications

• Pumping stations and deep-well pumps: air relief, surge protection and vacuum prevention.
• Pipeline high points, slope changes and crossings: protection against air accumulation and vacuum formation.
• Water distribution and transmission networks: protection against vacuum, surge and water column separation.

Technical specifications

• Model: C75-C
• Product family: Air Valves Series
• Body material: Ductile iron
• Primary functions: air evacuation during filling, release of trapped air pockets, large-volume air intake during draining
• Orifice: double-orifice; patented 2-step automatic orifice for minimized spraying
• Surge protection: Anti‑slam / slow closing device
• Low-pressure sealing capability: down to 1.5 psi (0.1 bar)
• Outlet options: sideways, downwards, circular mushroom; outlets swivel 360°
• Internal parts: fully corrosion resistant
• Quality control: factory-tested on specialized benches including vacuum tests
• Standards & certifications: EN-1074/4, SAI AS4956, WSAA, NSF/ANSI/CAN 61, NSF/ANSI 372
• Reference/barcode: 502063