PS470 Compact Digital Pressure relay

1.Hydraulic and pneumatic systems

Hydraulic system: It is used for overload protection, sequential action control, and unloading control (unloading the high-flow pump when the pressure is reached).

Pneumatic system: Controls the start and stop of the air compressor to maintain the pressure in the air storage tank. It serves as a sequential control signal in pneumatic circuits.

2. Refrigeration and Air Conditioning (HVAC/R

As a high and low pressure controller, it monitors the pressure of the refrigerant. When the pressure is abnormally high (condenser failure) or too low (refrigerant leakage), the power supply to the compressor will be automatically cut off to ensure the safety of the compressor.

3. Industrial pumps and compressors

Water pumps: Automatic start and stop control of towerless water supply devices and booster pumps.

Air compressors: Almost all small air compressors use pressure relays (pressure switches) to automatically control start and stop.

Vacuum pump: When the preset vacuum degree is reached, the pump will automatically stop.

4. Mechanical Equipment and Automation

Machine tool: Monitor the pressure of the lubrication system to ensure that the spindle can only be started after the lubrication pressure is normal.

Injection molding machine/die-casting machine: Pressure control and protection for actions such as injection and mold locking.

Packaging machinery: Control the sealing pressure to ensure packaging quality.

5. Vehicles and Transportation

Construction machinery: Monitor the pressure of the hydraulic system and pneumatic braking system, and issue alarms and provide protection.

Automobiles: Used for oil pressure alarm, air conditioning system pressure protection, etc.

6. Energy and Process Control

It is used as a safety limit device in small boilers and pressure vessels.

Monitor the pressure difference before and after the filter and send a signal for cleaning or replacement when it is clogged.