High Vacuum Pumps For Air Conditioning & Refrigeration
Welch’s high vacuum pumps are engineered to solve the most persistent challenges in HVAC and refrigeration service: long pump-down times, high water vapor loads, and the need for deep, reliable vacuum. Whether you're servicing rooftop units, ammonia chillers, or lithium bromide absorption systems, Welch pumps deliver consistent performance under demanding conditions.
Why Choose Welch
Welch pumps are built for industrial-grade reliability and precision. The CRVpro direct-drive series offers high flow in a compact footprint, ideal for rooftop jobs and fast system evacuation. The DuoSeal belt-drive series is a long-standing favorite for its low RPM, extended service life, and large oil reservoirs that dilute contaminants effectively.
Each model is designed to handle specific tonnage ranges and refrigerant types, including HFO, HFC, and ammonia. For lithium bromide absorption chillers, Welch offers pumps that resist salt-laden vapor and accidental ingestion of salt solution—critical for maintaining oil integrity and pump longevity.
