DAV-MP-1-KA Combination Air-Valve Metallic-Shield This valve has been designed for efficient discharge and intake of air in water pipelines, filtering systems, containers, and other places where confined air could impair the system’s operation. The valve is designed for: • Discharge of high air-volumes during the initial filling of the systems • Introducing large quantities of air when the pipe drains, maintaining atmospheric pressure in the pipe and preventing collapse and cavitation damage to the conduits • Relieving air from the water-filled system, while the network is pressurized Properties: Leak-proof sealing at all conditions, including low system pressure. The aerodynamic design of the float provides air flow at a very high velocity. The float does not close before the water has reached the valve. Threaded outlet elbow allows various possibilities of drain connection. The valve design contains a very limited number of parts, allowing easy dismantling for maintenance. Operation: The DAV-P-1-KA valve has three modes of operation: • Discharge of large volumes of air at a high flow velocity when the conduit is being filled. When the water arrives to the valve, the main float rises and closes the outlet. • Introduction of air into the pipeline when the internal pressure is sub-atmospheric. The pressure differential and the gravity, force the main float to drop to “opened” position, allowing the air to flow into the pipe. Releasing air from the pressurized, water-filled pipeline. Small quantities of air accumulate at high peaks of the pipeline and in the body of the valve. The descending water level allows the float to drop. At a certain position the main float pulls down the small seal, that partially opens the nozzle. The pressurized air can escape, the water level rises and the nozzle re-closes. Introduction of air into the pipeline when the internal pressure is sub-atmospheric. The pressure difference and the gravity, force the float to drop to “opened” position, allowing large volumes of air to flow into the pipe. Technical Specifications: • Operating pressure 0.2 to 25 bar • 1” BSP or NPT threaded base - as per the customer’s choice • Cover material: Cast Iron • Base Material: Brass • Internal parts: corrosion resistant, reinforced plastic materials and synthetic rubber • The valve allows the discharge of over 220m3/h of air at a pipe pressure of 1.0 bar, when fully-open Pipe is full of water Pressurized air accumulated in the valve, is released when the float drops down

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