Flow control valve with minimum-maximum level control E3110-44 / E4110-44

Applications

• On the outlet supply of storage tanks or downstream booster pump stations to control the maximum flow and limit the level within the required values.
• On the rooftop reservoirs as hydraulic back up for level control to avoid overflow.
• On the inlet supply line of storage tanks to control the level and avoid excess in flow during opening.

Accessories

• Linear position transmitter with 4-20 mA output Mod. CSPL.
• On-off position transmitter Mod. CSPO.
• Pressure measurement kit.
• Self-flushing and high-capacity filter.

Note for the engineer

• Anti-cavitation low flow stability plugs are recommended to provide an accurate regulation in case of low flow conditions.
• For the best accuracy leave 5 DN between the valve and the orifice plate and 3 DN downstream of it.

Additional features

• E3110-44-FR minimum and maximum flow level control valve with back flow prevention system.
• E3110-44-5 minimum and maximum level control valve with solenoid.

Working conditions

• Fluid: treated water.
• Minimum operating pressure: 1,2 bar.
• Maximum operating pressure: 16 bar.
• Recommended working pressure: 6 bar. Higher on request.
• Maximum temperature: 70 °C.

Flow rate control pilot adjustment range

• The orifice plate assembly is calculated and machined according to the maximum flow rate. An adjustment range of the value is possible according to the regulation flow chart supplied with the valve.

Min-max level control pilot adjustment range

• Between 0,2 and 4 meters.

It is operated by a 2 ways pilot (5) for flow control and connected to the orifice plate assembly (13), with pre-set set and adjustable values, sensing the differential pressure created by the flow rate.

The three ways minimum and maximum level pilot (16) receives the upstream pressure from item (4) and, by means of the hydraulic flow accelerator (15), will interrupt the flow to the circuit diverting all pressure to the main chamber (10) when the water level has reached the maximum value.

Should the latter drop below the minimum set-point, both values adjustable through mechanical blocks sliding on the wire, pressure is relieved out of the chamber of the flow accelerator (15) through the three ways pilot drain (20).

Consequently, the pressure of the control chamber (10) will be diverted downstream pushing the obturator upwards to generate flow through the main valve (9), enabling the flow rate control function of the pilot (5), whose spring is set to balance for the differential pressure created by the orifice assembly (13)

The flow regulation E3110-44 valve with minimum and maximum level control is used on an external stilling tank (2).

The flange orifice (5), calculated and machined according to the project’s requirements, is connected to the valve’s pilot (6).

The sectioning devices (1) and by-pass, where the direct acting pressure sustaining valves (4) are suggested, are very important for maintenance operations, as well as the filter (3) to prevent dirt from reaching the control valve.