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An electronically controlled proportioning valve (ECV) will take an electrical input signal (usually 4 to 20 mA) and proportion the amount of flow through a pipe from fully closed to fully open. These valves are used in industrial automation controls as proportional actuators and other industrial control applications. The OMEGA ECV valve features programmable reverse or direct acting control. Direct acting means that, as the current signal rises, the valve allows more flow, while reverse acting will decrease the flow rate with an increasing current signal.
These units can also be programmed to sense a failure in the current loop and fully / open the valve upon the signal levels dropping below 4.0 mA. Dry contact remote switches can be used in conjunction with the standard current signal to provide an alarm signal which fully closes/opens the valve. The rugged epoxy-coated aluminum package insures NEMA-4X protection or the powerful microprocessor and servo actuator.
SPECIFICATIONS:
ELECTRONICS:
Power Supply: 12-16 Vdc @1.5 A (10 Watts typ, 23 Watts max) (2.5 Amps for ¾ valve, 38 Watts max)
Inputs: 4 to 20 mA control signal (250 Ohm impedance), and dual external switch contact sensing via 5 Vdc signal
Control Modes: direct or reverse, full or split range, high or low range, fail condition open or closed
Adjustments: None
Operating Temp.: 0 to 49°C
Enclosure: NEMA-4X, epoxy painted aluminum
ACTUATOR:
Type: DC step motor, 200 steps/rev, 4 rev travel Resolution: 200:1 (0.5%) (4 steps increment)
Speed: 18 rpm
Torque: 57.5 in-oz (188 in-oz ¾ valve)
VALVE:
Type: In-line globe
Temp.: -18 to 120°C
Pressure: 120 psi max (70 psi on ¾ „valve)
Max Flow: GPM= Cv (DP/SG) ½ liquids; for gases use standard equation found in solenoid valve section
Wetted Parts: Ethylene propylene rubber O-ring, PTFE washer, and valve body (Brass models have 303 SS internal trim)
Complete informations can be found in the spec sheet (PDF), see the „Download“ section.
