Low Return Vacuum heating unit with a combination air and water pump that performs both the condensate and vacuum pumping functions. Multi-jet design proven to be effective and reliable means for removing air and lifting hot condensate in the return system. A standard cast iron receiver is provided with a standard 20-year warranty against corrosion failure for years of service. Standard unit designed for applications with low returns and system capacities ranging up from 2,500 square feet EDR; air pumps range up from 3 cubic feet per minute (cfm) at 5-1/2" HG at 160°F. Unit completely packaged, including electrical controls.
Units are available in either simplex or duplex configuration with either 1750 RPM or 3500 RPM motors in either single or three phase. Pumps are flange mounted to the receiver and equipped with industry standard motors. Pumps bronze-fitted with removable bronze wearing ring and with mechanical seals rated for temperatures up to 250°F. Higher temperature seals and special faces available upon request.