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Suitable for the waterwork sector.
Shut off, check, control, pressure and flow rate regulation.
PRESSURE MAX: 64 BAR
TEMPERATURE: +70°C
The needle valve is mainly designed for the flow rate regulation in a pipeline.
The flow regulation happens through the axial movement of a piston, moved by a rod and
crank mechanism. The piston is positioned in the center of the body valve, it shuts following
the flow and its movement happens in a chamber properly shaped in order to avoid noises and
cavitation damages. This feature confers to the valve regular operation with no vibration.
The flow rate is led to an annular chamber around the streamlined central body.
The cross section of this chamber becomes narrower and narrower from inlet to the throttle.
This causes continuous rises of flow speed and fall of the pressure.
The geometrically ideal design, confines the cavitation bubbles in the center of the outlet
mouth, avoiding damages to the valve. The regulation is got with high head loss, when the
valve opening is less than 40%, and very low head loss when the valve opening is more
than 50%. |
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