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Around-The-Pump Proportioner
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The Darley Around-The-Pump Proportioner is a simple and inexpensive way to add foam capability to all discharges of a truck. It allows for different flow requirements separately or in any combination. A portion of the truck output goes through an eductor and back to the inlet side of the pump. A metering valve is adjusted for the correct foam percentages based on the total discharge.
This system offers several advantages when compared to an inline eductor:
Variable Flow Rate-the discharge rate can be adjusted for the specific application. The rate is infinitely variable up to the maximum flow of the unit.
Variable Pressure-the system operates at any pressure above 120 psi. The pump operation is the same with foam or water.
No Back Pressure Restrictions-the unit is not affected by hose length or elevation loss.
No Nozzle Restrictions-the unit operates with any size or type of nozzle. Note: Maximum 5 psi Hydrant PressureThe pump Kit Includes: A. Eductor, B. Metering Valve, C. Check Valve, D. Water Valve, and E. Foam Valve Instruction Panel Plate Call Today For More Detailed
Information On The Darley
Around-The-Pump
Proportioning Kit
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