New-to-market PTS staging valves enhance reliability in centrifugal chillers and heat pumps

The PTS valves are specially designed to prevent compressor surge, a common issue in centrifugal compressors caused by low pressure during startup. By reacting quickly to surge conditions, the PTS valves stabilize compressor pressure, reducing the risk of damage and extending system life. They could also function as load-balancing valves.

During startup, the PTS valves open rapidly within 5 seconds, connecting discharge to suction via the evaporator to build pressure before the discharge check valve opens. This prevents gas recirculation, protects the compressor from internal shock, and results in faster startup times and more efficient system performance.