A spring-activated, resilient-seated air valve built to handle high-volume air discharge—crucial during pipeline drainage, fast shutdowns, or burst events. It integrates a VAG DUOJET® Automatic Air Valve (for operational air release) and features a friction damper for soft disk closure, offering robust protection for dams, long-distance pipelines, bottom outlets, and downstream of large butterfly valves.
DN 300–800
PN 10 / 16 / 25
Full-flange configuration per EN 1092-2 standard
Resilient-seated with integrated DUOJET® triple-function features (large, medium, small orifice)
Softens closing, curbing pressure surges
Large orifice: Rapid air venting
Medium orifice: Air release during filling
Small orifice: Continuous air release during normal operation
0.3 bar
Includes built-in shut-off valve (VAG CEREX® 300 Butterfly Valve) for safe maintenance
Optimally used in water distribution, treatment systems, dams, and long-distance mains—especially downstream of large valves where rapid venting and surge protection are critical.
– Standard Spring-Loaded Air Valve
– Anti-Surge Version (engineered to further reduce pressure pulses upon closing)
– Custom Sizes (DN 300–800) available upon request
– Body & Bonnet: Welded steel S235JRG2
– Inner Parts & Stem: Stainless Steel 1.4301
– DUOJET® Body: Ductile Iron EN-GJS-400-15 (GGG-40)
– Bolts: Stainless Steel A4
Factory-applied epoxy coating (inside and out) in line with GSK standards provides long-term corrosion resistance.
Designed for clean water and general potable water service. The DUOJET® is commonly used for air release in standard pipeline fluids; consult manufacturer for compatibility with aggressive media.
– Triple-Orifice Functionality: Handles varying flow conditions (startup, shutdown, operation) efficiently
– Integrated DUOJET®: Supports automatic in-operation air release
– Pressure Surge Mitigation: Friction damper softens closing impact
– Safe Maintenance: Integrated inspection valve allows servicing without total shutdown
– Versatile Sizing: DN 300–800 range supports large-scale installations
– Anti-Surge Variant for sensitive systems
– Custom DN Sizes beyond standard range available on request
– Maintenance Kits compatible with DUOJET® and inspection systems
From forging and casting to machining, assembly, and testing — every step is managed under one roof to ensure consistent quality, faster lead times, and zero compromise.
Get in touch with our team for additional information on product pricing, technical data, project support and more.
