Control Valves

An automatic control valve comprises the following components:

• Basic valve
• One or more pilot valves
• Solenoid pilot valve (on electrically actuated valves)
• Control tubes and fittings
• Filter for the actuation pressure source
• Additional accessories (relays valves, check valves, needle valves, etc.)

Manual On-Of Valve (M)

Equipped with a 3-way manual selector valve, permitting the
selection of "open" or "closed" positions on the main valve.
Control Devices: 3-way valve
Availability: All 3-way controlled valves

Electric Control Valves (EL)

This 3-way solenoid valve is activated by an electric current or
electric pulse, opening or closing the main valve. The "Normally
closed" position of the main valve is standard. The "Normally
open" position is optional. An electric activation feature may be added to
most control valves upon request.
Control Devices: Sizes 3/4" - 6" - Solenoid Valve Sizes 8" - 24" - Solenoid Valve
+ Accelerator Relay
Availability: All models

Pressure Reducing Valves (PR)

This valve maintains a preset downstream pressure,
regardless of upstream pressure or flow rate
fluctuation. The main valve is controlled by a 3-way
pilot valve (permitting full opening when downstream
pressure drops below the set-point) or by a 2-way pilot
valve (creating a pressure differential in any condition).
Availability: All models

Pressure Sustaining /Relief Valves (PS)

This valve maintains upstream (inlet) pressure, regardless of
flow rate variations. The valve will be in the "closed" position if
the inlet pressure drops below the set-point. Opens fully when
upstream pressure exceeds the set-point.
Availability: All models

Quick Relief Safety Valves (QR)

This valve opens instantly when the pressure in the pipeline
exceeds the safe level, thus relieving excess pressure in the
network. When pressure returns to normal, the valve closes slowly,
at an adjustable pace.
Availability: All models.