PDBF Series Boiler Feed

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. PDBF Series Positive Displacement Vacuum/Boiler Feed units are designed to pump condensate and makeup water directly into the boiler(s) using various pressures and flows specifically tailored to boiler specifications. Pumping action is determined by a boiler-mounted level controller and offers standard float-operated makeup valves or special electric solenoid valves on receivers designed to replenish water inside the boiler feed unit when water levels get too low. 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″ hg up 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