National Foam Proportioners utilize the water flowing through them to produce a venturi effect that induces foam concentrate into the water stream.

Line Proportioners
Line Proportioners are venturi devices that introduce foam concentrate into a flowing stream of water at a controlled proportioning rate. The line proportioner (also known as an inductor or eductor) is a simple, inexpensive method of proportioning when the water supply pressure is reasonably high. It has no moving parts and requires minimal maintenance.

Ratio Controllers
The Ratio Controller is a modified venturi proportioning device designed to inject foam concentrate into the water supply piping. It is compatible with all types of foam fire protection systems, and proportions all types of foam concentrates over their entire flow range without manual adjustments, regardless of pressure. Ratio controllers are available in threaded (RCT), flanged (RCF), or wafer (RCW) style.

  • FoamCalc


    FoamCalc is the new software program developed by National Foam to calculate the amount of foam required to protect storage ...

  • FDIC 2020

    FDIC 2020

    Come visit us at the FDIC 2020, booth # 1435, to see the latest developments from National Foam.  We look ...

  • Adipec, November 11-14, 2019

    Adipec, November 11-14, 2019

    We are attending the Adipec Exhibition in Abu Dhabi, Booth # 13237 in Hall 13.  Visit us to find out ...