Differential Pressure Switch DPSM 690
- Description
- Features
Differential Pressure Switch DPSM 690 – Reliable Safety Device for Refrigeration Compressors
Description:
The Differential Pressure Switch DPSM 690 is a robust and precise safety device designed for pressure-lubricated refrigeration compressors. It ensures that the lubricating oil pressure remains higher than the suction or crankcase pressure under all operating conditions, safeguarding the compressor from damage. Featuring a sturdy mechanism, manual reset functionality, and a time delay relay, the DPSM 690 is ideal for maintaining safe and efficient operations in HVAC systems, chillers, driers, cold storage, and compressors.
The device measures the differential pressure between the lubricating oil and crankcase pressure to monitor the lubrication system’s performance. If the pressure falls below the set differential value, the control mechanism interrupts the compressor motor circuit after a preset time delay, ensuring safety.
Applications:
- Compressors
- Driers
- HVAC Systems
- Cold Storage Units
- Chillers
How It Works:
- Bellows Marked OIL (P1): Connects to the compressor’s lubrication system outlet to measure oil pressure.
- Bellows Marked LP (P2): Connects to the compressor crankcase to measure crankcase pressure.
- Differential Pressure (P1–P2): Determines the pressure available for lubrication. If the differential pressure falls below the set value, the switch interrupts the motor circuit after a time delay.
Choose the Differential Pressure Switch DPSM 690 for reliable and efficient compressor safety in refrigeration and HVAC systems.
- Wide Adjustable Range: Supports varied operating conditions for enhanced application versatility.
- Sturdy Mechanism: Built with a robust internal mechanism for reliable long-term performance.
- Manual Reset Functionality: Requires a manual reset via the reset knob after a circuit break, adding an extra layer of safety.
- Time Delay Relay: Prevents immediate shutdown during transient fluctuations, ensuring smooth operation.
- Differential Pressure Monitoring: Measures and monitors pressure difference (P1–P2) to maintain optimal lubrication.