ARO A212SS-120-A 4-Way Solenoid Valve | 1/4 in. NPT, 120 VAC

ARO A212SS-120-A Alpha Series Solenoid Valve

The ARO A212SS-120-A is an Alpha Series body-ported pneumatic directional-control valve designed for compatible industrial automation and cylinder-control applications. It uses a 4-way, 2-position configuration with single-solenoid actuation and spring return.

This model features 1/4-inch NPTF ports, a 120 VAC AC-standard coil, an approximate flow rating of 50 SCFM, and a published Cv of 1.5.

4-Way, 2-Position Valve

The A212SS-120-A uses a four-way, two-position directional-valve arrangement suitable for controlling compatible double-acting pneumatic cylinders and other devices requiring alternate pressure and exhaust paths.

ARO identifies the valve as a body-ported Alpha Series configuration intended for compact standalone or remote pneumatic control installations.

Single Solenoid with Spring Return

The valve uses a single electrical solenoid for actuation and a spring return to return the spool when the coil is de-energized.

This arrangement provides electrically controlled switching while maintaining a defined return position when electrical power is removed.

120 VAC Coil

The model suffix 120-A identifies a 120 VAC coil with AC current in the ARO Alpha Series ordering system.

Confirm the available control voltage before installation. Applying an incorrect voltage can damage the coil or prevent proper valve operation.

1/4 Inch NPTF Body Ports

The valve uses 1/4-inch NPTF body ports. ARO catalog documentation identifies the port-size code “2” in this model as 1/4-inch NPTF.

Verify fitting size, thread compatibility and tubing capacity before installation.

50 SCFM Flow Capacity

Published distributor specifications list a nominal flow rating of approximately 50 SCFM and a Cv of 1.5.

Actual pneumatic performance depends on supply pressure, downstream load, tubing size, fittings and exhaust restrictions.

50 to 150 PSI Operating Pressure

The published operating pressure range is approximately 50 to 150 psi.

ARO documentation notes that an external supply conversion kit may be required for certain Alpha Series applications operating below 50 psi or under vacuum conditions.

Urethane Spool Seals

The A212SS-120-A uses a urethane spool seal configuration. The model-code documentation identifies the “2” valve code as a two-position valve with urethane spool seals.

Body-Ported Alpha Series Design

This is a body-ported valve, allowing pneumatic lines to connect directly to the valve body. The compact Alpha Series design is commonly used where space efficiency and direct pneumatic connections are important.

Typical Applications

The A212SS-120-A can be used in compatible applications such as:

• Double-acting pneumatic cylinder control
• Industrial machine automation
• Pneumatic sequencing
• Remote valve installations
• General directional-air control

Ordering ARO A212SS-120-A

Before purchasing, confirm:

• ARO model A212SS-120-A
• 4-way / 2-position function
• 1/4-inch NPTF ports
• 120 VAC control voltage
• Single-solenoid, spring-return operation
• Required flow and pressure range

Using the complete model number helps ensure the correct voltage, port size, spool material and actuator configuration are selected for the pneumatic system.