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Solenoid Valve Specifications and Dimensions: 3S020-035 Series
||3 Way Normally Closed (NC) or Normally Open (NO)
||Cv = 0.23; Orifice = 2mm
||Cv = 0.5; Orifice = 3.5mm
||0 to 100PSI
||0 to 60PSI
||5 to 248°F (-15 to 120°C)
|Port Size (NPT)
||Viton (Options: EPDM, NBR)
|Coil Protection Insulation Class
||H Class IP65
||13 to 20W
||Air, Gas, Liquid, Vacuum
3S020-035 Series: 2/3 Direct Acting Solenoid Valve Normally Closed
This valve is a three-way, direct-acting valve and does not require a minimum differential
pressure to operate. It can be configured as either normally open or normally closed. As shown
in the diagrams 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 at the P port. During
this time, the exhaust port is connected to the A port. When the coil is energized (right diagram),
the solenoid lifts the plunger and allows the working medium to flow from the P to the A port, with
the exhaust port sealed.
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
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 1 to 5 million cycles.
Electrical Coil Connections
- To Connect a DIN Coil:
- Remove the Philips screw from the plastic housting & unplug from the DIN coil.
- Use the removed screw to push the terminal block out of the plastic DIN housing.
- Note the "1", "2", and ground "⏚" symbols.
- For DC DIN Coils, connect "1" to your positive lead and "2" to your negative lead.
- For AC DIN Coils, connect "1" to your HOT lead, "2" to your NEUTRAL lead, and "⏚" to your ground lead, if required.
- To Connect a Grommet Coil:
- For DC Coils, connect the red wire to your positive lead and the black wire to your negative lead.
- For AC Coils, connect the black wire to your HOT lead and the white wire to your NEUTRAL lead.
- For Coils provided with Molded Cables, the color of the wire indicates the type of lead:
- GREEN = Ground Wire
- BLUE = Positive or HOT Wire
- BROWN = Negative or Neutral Wire