Product Overview
The MAC PID-421BAAD is a precision-engineered proportional pressure controller manufactured by MAC Valves, a globally recognized leader in pneumatic and hydraulic valve technology. Operating on a direct-acting, solenoid-driven proportional pressure regulation principle, this device converts an analog electrical input signal into a linearly proportional pneumatic or hydraulic output pressure. Unlike standard on/off directional valves, the PID-421BAAD provides infinitely variable pressure control, enabling precise closed-loop regulation of force, torque, or actuator speed within automated industrial systems. Its compact inline body design and high-cycle solenoid architecture make it ideal for demanding process control applications where accurate, repeatable pressure modulation is critical to product quality and system efficiency.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional Pressure Controller (Process & Pneumatic Valve) |
| Model Designation | PID-421BAAD |
| Manufacturer | MAC Valves |
| Actuation Method | Proportional Solenoid with Analog Input Signal |
| Operating Pressure | Standard Industrial Grade (Up to rated bar; consult factory for exact range) |
| Control Signal | Analog Voltage or Current (0–10 VDC / 4–20 mA typical) |
| Mounting & Connection | Standard ISO / Manufacturer Interface (Inline Body, Threaded Ports) |
| Seal Material | Nitrile (Buna-N) / Fluorocarbon (FKM) Options Available |
| Duty Cycle | Continuous Rated for Industrial Automation |
Engineering Features & Advantages
- Precision Proportional Control: The PID-421BAAD delivers infinitely variable pressure output directly proportional to the electrical input signal, enabling accurate closed-loop regulation of pneumatic or hydraulic circuits without the need for separate pressure regulators.
- High-Response Solenoid Actuation: Advanced solenoid design ensures fast response times and minimal hysteresis, providing repeatable pressure control critical for high-speed automated processes.
- Compact Inline Architecture: Space-saving body design allows direct integration into existing manifolds or inline piping without significant modification to system layout.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust construction that resists vibration, thermal cycling, and contaminated media.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original MAC Valves OEM standards, ensuring drop-in replacement without adapter kits or recalibration.
- Versatile Media Compatibility: Suitable for use with filtered compressed air, inert gases, and select hydraulic fluids depending on seal configuration.
Typical Industrial Applications
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PRODUCT IMAGES




MAC PID-421BAAD Proportional Pressure Controller
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- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine MAC PID-421BAAD Solenoid Directional Valve. This USA-made 24 VDC hydraulic component features a 4-way, 2-position spool design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.