Automatic control valves E3000 series with reduced bore

The following graph shows the Kv of the E3000 valves in the standard and anti-cavitation versions in relation to the shutter stroke (both values are expressed as a percentage). We recommend sizing the models so as to limit the variation in opening during operation between 20% and 80%.

The regulation and control unit has been designed to include all the components necessary for
proper operation of the automatic valves. Compared to other solutions available on the market, its compact structure, it makes the valve circuit easy to maintain and offers the user a wide range of adjustments, allowing various parameters to be set. It is made entirely of stainless steel machined from solid.

The unit consists of:

• a fine mesh filter in AISI 316 to protect the circuit from possible impurities;
• three needle valves for adjusting the reaction speed, opening, and closing of the valve, independently of each other;
• two 1/8 G pressure taps for accessory functions, one filtered and the other unfiltered.

It is important to consider the risk of cavitation, which can cause significant damage, as well as vibrations and noise. On the graph, the point corresponding to the operating condition of the valve, identified by the downstream pressure values (on the x-axis) and upstream pressure values (on the y-axis), falls into one of the three zones identified as follows:

• A: optimal operation;
• B: incipient cavitation;
• C: harmful cavitation.

The graph should be used for valves that modulate with an opening percentage of 35-40%, at standard temperature and at an altitude below 300 m. Under operating conditions, the pressure reduction differential must not exceed 15 bar.
 

The following chart shows the recommended flow rate for the proper sizing of E3001 control valves.

The Kv coefficient represents the flow rate that produces a pressure drop of 1 bar when the valve is fully open.

The graph on the side shows the pressure drops of the E3000 automatic control valves in the fully open position as a function of diameter and flow rate expressed in l/s.

The following table shows the recommended flow rates for the correct use of E3000 series automatic valves – V-port version.

The Kv coefficient represents the flow rate that produces a pressure drop of 1 bar when the valve is fully open.

The graph on the side shows the pressure drops of the E3000 automatic control valves in the fully open position as a function of diameter and flow rate expressed in l/s.

It is important to consider the risk of cavitation, which can cause significant damage, as well as vibrations and noise. On the graph, the point corresponding to the valve's operating condition, identified by the downstream pressure values (on the x-axis) and upstream pressure values (on the y-axis), falls into one of the three zones identified as follows:

• A: optimal operation;
• B: incipient cavitation;
• C: harmful cavitation.

The graph should be used for valves that modulate with an opening percentage of 35-40%, at standard temperature and at an altitude below 300 m. Under operating conditions, the pressure reduction differential must not exceed 15 bar.

The following table shows the recommended flow rates for the correct use of E3000 series automatic valves – anti-cavitation version.

The Kv coefficient represents the flow rate that produces a pressure drop of 1 bar when the valve is fully open.

The graph on the side shows the pressure drops of the E3000 automatic control valves in the fully open position as a function of diameter and flow rate expressed in l/s.