Overview
The PX Series Pressure Controller is a newly developed, high-precision solution designed for superior durability and repeatability in HVAC and refrigeration systems. It serves as a critical safety component, protecting compressors and industrial cooling systems from extreme pressure conditions. Whether you need high-pressure cut-out, low-pressure monitoring, or a combined dual-pressure solution, the PX series ensures stable performance across a wide range of refrigerants.
Key Features
- Enhanced Durability: Improved internal structure and high-grade materials significantly increase service life and repeatability.
- Wide Compatibility: Suitable for R22, R407C, R134a, R404A, and other non-corrosive fluids or gases.
- Flexible Reset Options: Available in Automatic Reset (for standard monitoring) and Manual Reset (for safety-critical cut-outs).
- Robust Electrical Ratings: Supports up to 24A (110V AC) / 12A (220V AC) non-inductive current, ideal for industrial applications.
- Weather Protection: IP20 rated housing, designed for stable operation in ambient temperatures from -20°C to +65°C.
Technical Specifications
- Media Temperature: -20°C to +120°C.
- Protection Rating: IP20.
- Connections: Available in Flare (7/16-20UNF or M12x1.25) or Capillary options.
- Cable Entry: Φ15 hole for secure wiring.
| Model | Low Pressure | High Pressure | Reset Type | Test Pressure | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Range | Diff. Range | Range | Diff. Range | Low Press. | High Press. | Low Press. | High Press. | |||||||||
| MPa | psi | MPa | psi | MPa | psi | MPa | psi | Auto | Man. | Auto | Man. | MPa | psi | MPa | psi | |
| PX6E | -0.03 ~ 0.7 | 10″~100 | 0.06 ~ 0.4 | 9~58 | ● | 1.7 | 243 | |||||||||
| PCX6E | ● | |||||||||||||||
| PX6ME | ≤ 0.1 | ≤ 14.3 | ● | |||||||||||||
| PCX6ME | ● | |||||||||||||||
| PX20DE | 0.7 ~ 2 | 102 ~ 290 | 0.15 ~ 0.6 | 22 ~ 87 | ● | 3.5 | 500 | |||||||||
| PCX20DE | ● | |||||||||||||||
| PX30DE | 0.7 ~ 3.1 | 102 ~ 450 | 0.2 ~ 0.8 | 29 ~ 116 | ● | |||||||||||
| PCX30DE | ● | |||||||||||||||
| PX30ME | ● | |||||||||||||||
| PCX30ME | ● | |||||||||||||||
| PX830E | -0.03 ~ 0.7 | 10″~100 | 0.06 ~ 0.4 | 9~58 | ● | ● | ||||||||||
| PCX830E | ● | ● | 1.7 | 243 | ||||||||||||
■ Connection Types
-
UNF Thread: 7/16-20UNF (1/4 flare tube)
Add suffix “E” after the model number - Metric Thread: M12X1.25 (Φ6 flare tube)
■ Dimensions (mm)
| Series | Model | W | L |
|---|---|---|---|
| Single Low Pressure | PC | 80 | 108 |
| PCX | 68 | ||
| Single High Pressure (Adjustable Differential) |
PC | 80 | 100 |
| PCX | 68 |
FAQ
Q: What refrigerants are compatible with the PX Series?
A: The PX series is compatible with most standard refrigerants including R22, R134a, R404A, and R407C. It is suitable for any fluid or gas that is non-corrosive to copper alloys and has a viscosity below 2°E.
Q: Should I choose an Automatic or Manual reset model?
A: Automatic Reset is ideal for systems where the pressure is expected to fluctuate and normal operation should resume once the pressure returns to the set range. Manual Reset (e.g., PX6ME, PX30ME) is a safety requirement for critical high-pressure protection, requiring a technician to inspect the system before restarting.
Q: Can this controller be used in outdoor environments?
A: The PX series has an IP20 protection rating, which means it is protected against solid objects but not waterproof. For outdoor use, it should be installed inside a secondary NEMA or IP-rated enclosure.
Q: What are the thread connection options?
A: We offer two main connection types: American standard 7/16-20UNF (1/4 flare) and Metric M12x1.25. Please specify your requirement when ordering (Models with suffix ‘E’ typically denote specific thread configurations).