Plunger flow control valve

The plunger flow control valve is mainly designed to regulate flow rate and pressure in water pipelines. This regulation is achieved by the axial movement of a plunger, operated by a shaft - rod - crank mechanism.

The plunger is positioned in the center of the valve, in a chamber specially shaped to protect it from the water flow and avoid noise and cavitation damage, while also ensuring vibrations-free operations.

The water flow is channelled through a ring-shaped chamber around the central body of the valve. The cross section of this chamber reduces constantly from the inlet to the outlet of the valve, causing rise in the flow velocity and drop of the pressure. 

This ideal geometric shape protects the pipe from cavitation bubbles, which are directed towards the center of the down-stream outlet  flange.

A perfect balance between the upstream and downstream chambers allows the plunger flow control valve to be operated under low torque levels.