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DAV-MP-1-A0 pages
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DAV-MP-1-A
Automatic Air-Valve
Metallic-Shield
This valve is designed for an efficient release of entrapped
air from the pipeline, while the network is at normal working
pressure.
Due to the relatively large orifice, compared to other
Automatic valves in the market, it can also release the air
through initial filling of a small-diameter pipe, or admit air
into it while it is drained.
Properties:
An Automatic air valve, that enables the release of air that
accumulates in the liquid-filled pipeline. The valve will
release the air at normal operation pressures of the pipeline.
The Float is made of naturally-buoyant material (specific
weight lower than 1) and activates a sealing stripe, that
closes the outlet port when the water fills the valve body.
On accumulation of air in the valve, loss of buoyancy causes
the float to drop and to pull the strip, thus opening the air
outlet.
The Hydraulic sealing of the orifice will provide a drip-tight
closure at a pressure as low as 2mwc (3psi).
Operation:
Releasing air from a pressurized pipeline. Small quantities
of air accumulate in 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 seal, that
partially opens the nozzle.
The pressurized air can escape, the water level rises and the
nozzle re-closes.
Technical Specifications:
•t Operating pressure 0.2 to 25 bar
•t 1” BSP or NPT threaded base - as per the customer’s
choice
•t Cover material: Cast Iron
Base material: Brass
parts: corrosion resistant, reinforced plastic
materials and synthetic rubber
•t The valve allows the discharge of 14m3/h of air at a pipe
pressure of 3.0 bar, when fully-open
•t Internal
Principle of operation:
Pipe is full of water
Pressurized air accumulated
in the valve, is released when
the float drops down
Pipe is aerated
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