Overview
The MAC 55B-11-PI-590JJ is a precision 3-way pilot-operated solenoid valve from MAC’s industry-leading 55 Series. Featuring internal pilot air operation and a 24 VDC 2.5W solenoid, this valve delivers balanced spool actuation ideal for pneumatic control circuits. The valve maintains consistent shifting and response regardless of back pressure or inlet restrictions, making it a trusted choice for OEM and retrofit applications in manufacturing, automation, and fluid power systems.
Key Features
- 3-way, 2-position normally closed configuration with spring return
- Balanced spool design insensitive to exhaust back pressure and inlet restrictions
- Internal pilot air operation with large checked accumulator for consistent, rapid response
- 24 VDC 2.5W solenoid with square DIN 43650 connector
- 30–150 PSI rated pressure range; convertible for vacuum operation
- Compact inline mount with 1/4″ NPTF female threaded ports
- Suitable for lube and non-lube pneumatic service
Technical Specifications
- Series: MAC 55 (3-way balanced spool valve)
- Part Number: 55B-11-PI-590JJ
- Valve Function: 3-way, 2-position, normally closed
- Solenoid Voltage: 24 VDC
- Solenoid Power: 2.5 W
- Pressure Range: 30–150 PSI (0.2–10.3 bar)
- Pilot Operation: Internal pilot air with accumulator
- Port Size: 1/4″ NPTF (female threaded)
- Electrical Connection: Square DIN 43650 plug connector
- Flow Coefficient (Cv): 1.4
- Mounting: Individual inline installation
- Actuator: Manual override option available
- Material: Ductile iron body, steel components
- Response Time: Extremely rapid cycle rate
- Operating Temperature: Industrial standard pneumatic range
Typical Applications
- Pneumatic actuator control (cylinders, air motors)
- Automated manufacturing and assembly systems
- Production line control and sequencing
- Packaging and material handling equipment
- Vacuum systems and low-pressure circuits
- Fluid power test stands and laboratory equipment
- Industrial automation retrofit and replacement
Compatibility & Replacements
Compatible With
- Pneumatic circuits 30–150 PSI operating range
- Standard industrial compressed air systems
- DIN 43650 square connector electrical cabinets
- 24 VDC control logic systems (PLCs, relays, solenoid drivers)
- Inline manifold mounting blocks (1/4″ NPTF threaded)
- Both lube and non-lube pneumatic environments
Replaces / Drop-In Replacement For
- MAC 55B-11-PI-590JA (same series, older connector variant)
- Other MAC 55 Series 3-way pilot-operated valves with identical porting
Works With
- 24 VDC solenoid driver modules and relays
- Pneumatic system accumulators and regulators
- ISO 4401-05-02-0-05 manifold cavity standards
- Remote pilot air control systems
- Manual override actuators for emergency operation
