F+W large flow DD series proportioner, with remote water supply system, is an ideal choice for large petrochemical fires, only driven by fire water, no diesel engine power, no hydraulic system, no flow and control system, pure mechanical, simple system, reliable operation, only need to operate the valve.

F+W large flow DD system proportional mixers have a variety of flows of 200 L/s, 300 L/s, 400 L/s and 600 L/s to meet the needs of various remote water supply systems, and can easily achieve 3% and 6% mixing ratio switch.