Quality in the water network

Automatic control valve diaphragm actuated
Art. M3640-M2640
Application field
The ON-OFF FLOAT CONTROLLED WITH FUNCTION FLOW RATE CONTROL VALVE, controls the level minimum / maximum of a tank, automatically maintaining a constant regulated flow rate value.
General informations
Controls the minimum and maximum water levels in a reservoir using a three-way float pilot. The two trigger levels are easily adjusted by moving the clamps on the float device arm. Adjustment is between a minimum of 10 cm to a standard value of 1m. A kit can be supplied on request to increase this interval. This type of valve is normally used on reservoirs fed by uplift systems that require intermittence, on storage tanks, booster reservoirs, or fire fighting reservoirs.
The valve automatically maintains a constant flow rate regardless of fluctuations in upstream and downstream pressure. Any variations, measured by a calibrated diaphragm normally installed downstream of the valve, are transmitted to the differential pilot, which intervenes immediately to precisely regulate the main valve outlet rate. The controlled outlet value can be adjusted by tightening or releasing the pilot adjustment screw. The valve is provided with two pressure outlets (upstream and downstream of the diaphragm) to enable flow rate measurement with a differential manometer (supplied on request) in the absence of a flow meter.
Additional features
  • remote control on/off switching;
  • non return;
  • anti-freeze device;
  • pressure reduction with dissipation disk to control flow and prevent cavitation;
  • anti water hammer resulting from very rapid closure;
  • parallel pressure relief - a single valve capable of releasing over pressure generated by the closure of the float valve itself or by other upstream manoeuvres.
Available other features on request.