PDVC Series Condensate Return

PD Series units produce a powerful vacuum that allows boilers to operate at a lower pressure, minimizing heat loss and reducing heating costs. Units are available in simplex, semi-duplex, and duplex models. PDVC Series Positive Displacement Vacuum/Condensate Return units are designed to collect and quickly return condensate to the boiler feed unit using various designed pressures and flows. Pumping action is controlled by the water level inside the receiver and a standard float switch or a mechanical alternator is used to turn the pump(s) on and off. Liquid-Ring Vacuum pumps come with durable impellers designed for smooth and efficient water passage and produce a liquid seal in the water tank when running.


  • Cast iron and steel receivers
  • Capacities from 1,000 to 125,000 sq. ft. EDR
  • Air capacities from 1 to 150 CFM
  • Standard receiver capacities from 29 to 1,000 gallons



JV and PD Vacuum Series Brochure 2019
JV and PD Vacuum Series Brochure 2006
JV and PD Vacuum Series OM 2000


  • Various flows and pressures designed to meet the strictest specifications
  • Customizable control panels with multi-function capability and Building Management System integrations
  • Liquid-Ring Vacuum pumps range from 23 to 150 CFM @ 5.5″ to 15″ hg
  • Choice of cast iron or 3/8″ thick carbon steel receivers in a broad range of size options
  • Close-coupled design, cavitation protection, TEFC motors, and standard mechanical seals capable of handling temperatures up to 250°F
  • Fast air removal allowing for smaller piping sizes
  • 3 to 120 gpm
  • 10 to 60 psi (3,500 rpm only)
  • 6 to 150 CFM @ 5.5″ hg (1,750 rpm only)
  • 208–230/460 volt three-phase