Each CHEMGUARD proportioner consists of a body, inlet nozzle, and metering orifice, all of which are corrosion-resistant brass.
The proportioner body design includes four sizes to fit between a 3 in., 4 in., 6 in., or 8 in. pipe flange. Clearly marked on the proportioner body is the flow direction arrow, as well as the type and percentage of the designated concentrate.
The inlet nozzle is secured by a stainless steel retaining ring that is internally concealed to prevent removal after installation.
The metering orifice is sized according to the type and percentage of concentrate used and is also secured with a stainless steel retaining ring.
Application
CHEMGUARD proportioners are specifically designed to accurately proportion and control the mixing of pressurized CHEMGUARD foam concentrates into a water stream with minimum pressure loss. CHEMGUARD proportioners are UL Listed and FM Approved with various CHEMGUARD foam concentrates, and are used in conjunction with bladder tanks and pump proportioning skids. Typical applications include flammable liquid storage tanks, loading racks, aircraft hangars, heliports, and anywhere flammable liquids are used, stored, processed, or transported.
Specifications
The proportioner body and inlet nozzle shall be of low zinc (less than 15%) brass. The nozzle and foam orifice retaining rings shall be of stainless steel.
The proportioner body shall be designed so that it fits between two ANSI 150 lb pipe flanges. Only the recovery section of the proportioner shall protrude into the system water piping. To capture and seal against the flange gaskets, the mating face shall be machined with 32 grooves per inch (25 mm) for the 4, 6, and 8 in. models, and 64 grooves per inch (25 mm) for the 3 in. model. The body shall be clearly marked with a flow direction arrow, and the type and percent of foam concentrate that it was designed to proportion.
The convergent inlet nozzle shall have a rounded inlet and a smooth machined finish to ensure minimum stream constriction and maximum velocity. It shall be retained by an internally concealed retaining ring that prevents removal after installation.
The foam concentrate metering orifice shall be machined to the proper diameter for the agent. It shall rest on a machined surface to prevent leakage and shall be secured by a removable stainless steel retaining ring.