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Click Here to read about the Wilden Pro-Flo Compact Pump Solutions.
Pro-Flo® & Pro-Flo™ X Air Distribution System (ADS) Accu-Flo™ Solenoid controlled ADS available Largest application range in the industry Longest MTBR (Mean Time Between Repair) Simplicity of design and ease of maintenance Drum pump kits available for drum & tote unloading Integral Piston Diaphragms (IPD) options available.
The Pro-Flo® patented air distribution system incorporates three moving parts: the air valve spool, the pilot spool, and the main shaft/diaphragm assembly. The heart of the system is the air valve spool and air valve. As shown here, this valve design incorporates an unbalanced spool. The smaller end of the spool is pressurized continuously, while the large end is alternately pressurized then exhausted to move the spool. The spool directs pressurized air to one air chamber while exhausting the other. The air causes the main shaft/diaphragm assembly to shift to one side — discharging liquid on that side and pulling liquid in on the other side. When the shaft reaches the end of its stroke, the inner piston actuates the pilot spool, which pressurizes and exhausts the large end of the air valve spool. The repositioning of the air valve spool routes the air to the other air chamber.