Overview
The MAC 912B-PM-111CA is a single-solenoid 4-way, 2-position piloted solenoid valve from MAC Valves’ proven 900 series family. This pneumatic control valve operates at 110/120 VAC (50/60 Hz) and handles pressure ranges from 25 to 150 PSI, making it ideal for industrial automation, robotics, and machinery control applications where directional airflow management is critical. With a Cv rating of 1.2, the valve provides responsive, repeatable switching action backed by patented MACSOLENOID technology that eliminates burn-out failures common in standard AC solenoids.
Key Features
- Single solenoid piloted design with monostable (spring-return) operation
- Balanced piston spool handles pressure fluctuations with consistent performance across the 25–150 PSI range
- 1/4″ NPTF threaded female pneumatic ports for easy in-line integration
- Non-locking recessed manual operator allows manual override for maintenance and diagnostics
- Muffled pilot exhaust reduces noise in noisy environments
- Compact, lightweight design (0.90 lbs base model) supports space-constrained installations
- Piston spool construction for durability and extended service life in demanding applications
- Operates lube-free; optional lubricant compatible (180–210°F aniline-point medium)
- 1/2″ NPS conduit entry with coil class A encapsulated design
Technical Specifications
| Manufacturer | MAC Valves Inc. |
| Part Number | 912B-PM-111CA |
| Series | 900 Series |
| Valve Type | 4-Way, 2-Position Solenoid (Single Solenoid) |
| Pressure Range | 25–150 PSI |
| Control Voltage | 110 VAC (50 Hz) / 120 VAC (60 Hz) |
| Solenoid Coil Power | 6.8 watts (typical) |
| Port Size (Pneumatic) | 1/4″ NPTF female |
| Electrical Connection | 1/2″ NPS conduit entry |
| Flow Coefficient (Cv) | 1.2 |
| Spool Design | Balanced piston spool |
| Return Mechanism | Pneumatic / mechanical spring reset (monostable) |
| Manual Override | Non-locking recessed manual operator |
| Weight | 0.90 lbs (conduit base model) |
| Certifications | IEC 61504-8, IEC 61541-1, ISO 13849, REACH, Low Voltage Directive, CE marking |
| Operating Medium | Compressed air, inert gases, or vacuum |
Typical Applications
- Automation & Robotics: Directional control of pneumatic actuators, grippers, and tool changers
- Manufacturing Equipment: Clamping, indexing, and part transfer systems
- Material Handling: Conveyor diverters, gate controls, and sorting mechanisms
- Machine Tools: Coolant pump control, workholding, and auxiliary drive circuits
- Process Control: Air-operated dampers, blower controls, and valve switching in industrial lines
- Mobile & Portable Equipment: Dump body controls, brake activation, and auxiliary function switching
Compatibility & Replacements
Compatible With
- Any compressed air system or vacuum circuit rated 25–150 PSI
- Standard industrial 120 VAC 50/60 Hz power supplies
- 1/4″ NPT and NPTF pneumatic port standards
- MAC Valves Series 900 family accessories and integrated manifolds
- Pneumatic actuators, cylinders, motors, and air tools requiring 4-way solenoid switching
Replaces / Drop-In Replacement For
- 912BPM111CA (alternative part designation)
- Other MAC 900 series 4-way solenoids with 120VAC coils and 1/4″ NPTF ports (verify specific model compatibility with your integrator)
Works With
- Pneumatic manifold blocks and integrated circuit designs supporting 1/4″ port configuration
- Direct 120 VAC line power; no external control module required for simple on/off switching
- PLC, motion controller, or relay logic circuits for automated control sequences
- Manual panel-mounted push-button or toggle switches for manual operation
- Inert gas or vacuum media (confirm compatibility with your media before deployment)
