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Solenoid Valve Specifications and Dimensions: 2W025-040 Series


Valve Model 2W012-1/8 2W025-1/4 2W035-1/4 2W040-3/8
Action 2 Way Normally Closed (NC)
Cv (Orifice) 1.2mm 0.23 (2.5mm) 0.5 (3.5mm) 0.6 (4mm)
Operating Pressure 0 to 150PSI
Operating Temperature Standard: NBR Seal: -10 to 80°C;
Option: Viton Seal: -15 to 120°C
Port Size (NPT) 1/8" 1/4" 1/4" 3/8"
Body Materials Brass
Seal Materials NBR (Option: Viton)
Coil Protection Insulation Class H Class IP65
Voltages Standard: 12VDC, 24VDC, 24VAC, 110VAC, 220-230VAC (50/60Hz).
Voltage Tolerances: +10% -5% for DC, +10%-15% for AC
Coil Duty 100% ED (Continuous Duty)
Coil Power 12W 13 to 20W
Electrical Connections DIN
Service Air, Gas, Liquid, Vacuum Steam (with Viton Seal)
Response Time <20msec

The 2W012-040 valves are direct acting solenoid valves that do not require a minimum operating differential pressure. As shown in the diagram below, when the coil is de-energized (left diagram), the plunger rests on the main orifice and is held in place by the plunger spring force, sealing the valve. When the coil is energized (right diagram), the solenoid lifts the plunger and allows the working medium to flow through the orifice. The working medium and flow direction are indicated in purple in the diagram.

STC's high performance direct acting plastic body solenoid valves offer reliability, compact and rugged designs, low power consumption, high-speed response, long-life cycle (over 10 million cycles), DIN connections and indicator lights, pre-wired electrical connections, manifold mounting options, and simple installation, maintenance, and control.

ALL standard valves are supplied with Continuous Duty Coils of the proper class of insulation for the service indicated on the valve. It is normal for the coil temperature may become hot after being energized for extended periods. Smoke or burning odor indicates excessive coil temperature and the power should be disconnected to the coil immediately.

SERVICE LIFE: The service life of the solenoid valve depends on the operating conditions such as pressure, temperature, type of medium, and the voltage. Normally the STC solenoid valves are reliable for more than 5 million cycles.

Electrical Coil Connections

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