This is a negative pressure proportioner, usually using a venturi tube. When water flow through the tube will generate negative pressure, and then the foam concentrate is sucked into the proportioner. Due to the ratio of the flow area, so as to achie
More >>This kind of proportioner is similar to the in-line eductor, which is installed in the bypass between the outlet of the pump and the suction inlet. Part of the water at the outlet of the pump flows into the proportioner, and then the venturi tube of
More >>This is a kind of balanced proportioner, that is, the inlet pressure of water and foam concentrate is the same, so that the pressure difference of water flow through the water orifice plate (or venturi tube) and the foam flow through the foam orifice
More >>GB50151-2021 has defined the coupled water-turbine driven pump proportioning set, and recommends the use of coupled water-turbine driven pump proportioners in many articles. Because of the use of water turbine (hydraulic motor), no drainage channel i
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