EVAPCO introduces PuRe-JET, a pumpless recirculation adiabatic system. PuRe-JET aims to minimize system complexity while reducing water usage and long-term operational costs. PuRe-JET uses a demand-based control strategy. Under standard conditions, the system operates with energy-efficient fans that ramp up as load and ambient temperatures increase. When additional cooling capacity is required, the system activates staged adiabatic assist to maintain precise temperature setpoints. During Stage 1 operation, make-up water is introduced into the system and directed through EVAPCO’s proprietary pumpless ejector device. Using a venturi action, the ejector draws recirculated water from the tank and accelerates it through the system, achieving full adiabatic performance without a pump. This optimized water distribution fully saturates the adiabatic media, lowering the entering air temperature and increasing heat rejection across the coil.

The system is designed for water efficiency by recirculating unused water while managing bleed-off to control cycles of concentration. As thermal demand continues to rise, Stage 2 is automatically initiated, following the same sequence of operation to ensure consistent performance under peak conditions.