Product Overview
The Proportion-Air PSR-3 is a precision electro-pneumatic pressure regulator engineered for closed-loop pressure control in industrial process and pneumatic systems. Utilizing an internal pressure feedback sensor and a high-speed proportional solenoid, the PSR-3 continuously compares actual output pressure against a commanded electrical setpoint and modulates the internal valve orifice to maintain accurate, repeatable pressure regulation. This device functions as a pressure control valve rather than a pump, delivering stable downstream pressure proportional to an analog or digital input signal. Its compact manifold-mount design makes it suitable for integration into OEM machinery, test stands, and automated process lines where precise electronic pressure control is required.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Electro-Pneumatic Pressure Regulator (Proportional Valve) |
| Model Designation | PSR-3 |
| Operating Pressure | Standard Industrial Grade (Up to rated bar) |
| Mounting & Connection | Standard ISO / Manufacturer Interface |
| Control Input | Analog Voltage / Current Command Signal |
| Feedback Type | Internal Closed-Loop Pressure Sensor |
| Actuation | Proportional Solenoid with Spool/Orifice Modulation |
Engineering Features & Advantages
- Precision Performance: Closed-loop electronic feedback delivers highly accurate and repeatable output pressure regulation proportional to the command signal, minimizing hysteresis and drift.
- Fast Dynamic Response: High-speed proportional solenoid actuation enables rapid pressure correction for dynamic process control and test applications.
- Industrial Reliability: Built for continuous operation under severe industrial conditions with robust construction and stable long-term performance.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards for drop-in integration.
Typical Industrial Applications
Commonly deployed in pneumatic test and calibration benches, automated assembly and packaging machinery, plastic injection molding auxiliary systems, and general industrial process control loops requiring precise electronic pressure regulation. Also suitable for tension control, web handling, and valve actuation circuits in CNC machine tools and metallurgical equipment.
PRODUCT IMAGES

Proportion-Air PSR-3 Electro-Pneumatic Pressure Regulator
âš¡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- 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 PROPORTION-AIR PSR-3 Electro-Pneumatic Pressure Regulator. This USA-made 0-10 VDC hydraulic component features a closed-loop pressure control design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.