C-5 Series Vacuum Boiler Feed

The C-5 Series vacuum boiler feed units pump condensate and makeup water directly into the boiler(s) using various pressures and flows specifically tailored to boiler specifications. This vacuum unit comes with one compartmentalized tank made up of one hurling chamber and one accumulator chamber. Pumping action is determined by a boiler-mounted level controller that senses boiler water level requirements.

Vent-Rite offers standard float-operated makeup valves or special electric solenoid valves on tanks designed to replenish water inside the boiler feed unit when water levels get too low. Vacuum pumps circulate water to and from the hurling tank. As water and air pass through a jet-type exhauster, it creates a powerful vacuum that helps remove air from the system, allowing steam to travel longer runs and providing quicker warm-up times.


  • 3/16″ thick carbon steel receiver tank
  • Simplex and duplex units
  • Pump capacities to 97.5 gpm
  • Discharge pressures of 20, 30, and 40 psi


  • 5,000 to 65,000 sq. ft. EDR


C-5 Series Brochure 2022

C-5 Series Bulletin 2022

C-5 Series Operations & Maintenance Manual 2023

C-5 Series Parts List 2022

C-5 Series Features & Specifications

  • Fast air removal allows for smaller piping sizes
  • Compartmentalized 3/16″ thick carbon steel tank
  • Durable impeller designed for smooth and efficient water passage
  • Customizable control panels with multifunction capability and Building Management System integrations
  • Standard mechanical seals capable of handling temperatures up to 250°F
  • Condensate units come standard with a float switch or mechanical alternator
  • Boiler feed units come standard with float-operated makeup valves; solenoid valves optional
  • Various flows and pressures designed to meet the strictest of specifications
  • Simplex and duplex units available
  • Pump capacities to 97.5 gpm
  • Discharge pressures of 20, 30, and 40 psi
  • Air capacities range from 2.6 to 36 cfm
  • Motors ranging from 1/3 hp to 10 hp available in 115, 208, or 230 single phase or 208, 230, or 460 three phase, 3,500 RPM