Triple function air valve with anti-surge anti-water hammer device LR
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2” - DN50 to 400
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PN 10 – 16 – 25 - 40
The surge dampening, anti-slam automatic air valve Mod. LR has been designed to allow the release of
air pockets accumulated in working conditions, the entrance of large volumes of air in case of pipe
draining or bursts and to prevent pipeline damages coming from pressure transients, associated with
high air out flow velocities.
Technical features and benefits
Technical features and benefits
• Uncontrolled pipeline filling operations and transient events will inevitably generate the rapid closure of the air valves installed along the system, with consequent damages. The air valve LR will automatically adjust the outflow capacity, thus reducing the velocity of the incoming water column, minimizing the risk of water hammer.
• The spray effect during closing and the risk of drowning, compared to standard combination air valves, are reduced.
• Single chamber body in ductile cast iron, PN 40 bar rated, provided with internal ribs accurate guiding of the mobile block.
• Mobile block composed of the main float and upper disk, joined together by the air release system in AISI 316 (patent pending), and an additional anti-surge obturator.
• Nozzle and gasket holder, part of air release system, entirely made in AISI 316.
• Cover in ductile and scree in stainless steel as a standard execution, to prevent the entrance of insects, with optional outlet for submerged applications and air conveyance.
Applications
Applications
• Main transmission lines.
• Water distribution networks.
• Irrigation systems.
• In general this model is used, in combination with anti-water hammer technology, on changes in slope and high points of the profile to provide the best air management and control with effective surge protection.