An electronically controlled proportioning valve (ECV) will take an electrical input signal (usually 4-20 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 close/ open the valve upon the signal level’s dropping below 3.5 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.
ELECTRONICS: Power Supply: 12-16 Vdc @1.5 A (10 Watts typ, 23 Watts max) (2.5 Amps for 3 /4 valve, 38 Watts max) Inputs: 4-20 mA control signal (250 ohms 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: Zero offset ±0.5 mA Operating Temp.: 0 to 49°C (32 to 120°F) Enclosure:NEMA-4X, epoxy painted aluminum Connections: 1 /2 NPT conduit (16" 22 AWG pigtail leads)
VALVE: Type: In-line globe Temp.: 0 to 250°F (-18 to 120°C Pressure: 120 psi max (70 psi on 3 /4 "valve) Max Flow: GPM= Cv (DP/SG) 1 /2 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 UNIT: Dimensions: 216 H x 185 W x 137 mm D (8.5 x 7.3 x 5.4"); /2 valve: 229 H x 185 W x 137 mm D (9 x 7.3 x 5.4"); /4 valve: 305 H x 203 W x 191 mm D (12 x 8 x 7.5") Weight: 3.2 kg (7 lbs); 1 /2 valve: 4.5 kg (10 lb); 3 /4 valve: 8.2 kg (18 lb)
† All dollar amounts on this site are shown in US currency.