Solenoid Valve Specifications and Dimensions: 2MSO120-500 Series

2MSO Series: 2/2 Pilot Piston Normally Open Solenoid Valve

The 2MSO series valves are 2 way, normally open, internal pilot piston solenoid valves.

To Close: when the valve is energized, it repels the plunger and forces the plunger to close the main orifice. The system pressure builds up on the top of the piston because fluid enters through the bleed orifice, forcing the piston down until it covers the main orifice and stops media flow through the valve.

To Open: When the valve is de-energized, it releases the plunger and the spring pushes the plunger away from the pilot orifice, allowing fluid to flow out and causing the system pressure holding the piston closed to drop. As system pressure on the top of the piston is reduced, full system pressure on the opposite side of the piston acts to lift the piston away from the main orifice, which allows the full media flow through the valve.

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.Electrical Coil ConnectionsTo 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