The flow is measured by a rotameter. A regulator allows to adjust the pressure of the network. The difference of pressure between the upstream and downstream of the control valve is measured with the help of a differential pressure transmitter with local display. A pneumatic servomotor valve is supplied by the water network via a needle control valve. The device is mounted on a welded stainless steel frame, equipped of 4 adjustable feet. The influence of the positioner on the answer of the valve is determined with the help of a current generator (4/20 mA) allowing the control of the control valve servomotor via an I/P converter (0,2 to 1 bar) or via a pneumatic electro-positioner. 

Technical specifications:-

•  A needle flow adjusting valve made of stainless steel.

•  A pneumatic needle control valve with variable Cv made of stainless steel.

•  A regulator 0-3 bar of the water supply circuit with manometer.

•  An electro-positioner.

•  A regulator, with air oil separator and manometer.

•  A differential pressure transmitter with local display and bleeding manifold.

•  A rotameter (scale 60 to 600 l/h).

•  An electrical cabinet, IP 55, including .

•  A padlocked main switch.

•  A ON light.

•  An emergency stop button with key.

•  A current generator (4/20 mA) with potentiometer and indicator.

•  Control signal output by safety plugs.