Wilden P400/AAPP/PU/PU/PU – Advanced™ Series Metal Pumps

OVERVIEW

The Pro-Flo® patented air distribution system incorporates two
moving parts: the air valve spool and the pilot spool. The heart of
the system is the air valve spool and air valve. 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.

PERFORMANCE

Air Inlet: 13 mm (1/2″)
Inlet: 38 mm (1-1/2″)
Outlet: 38 mm (1-1/2″)
Suction Lift: 4.2 m Dry (13.6′)
8.9 m Wet (29.5′)
Displacement/Stroke: 1.14 L (0.30 gal)1
Max. Flow Rate: 401 lpm (106 gpm)
Max. Size Solids: 7.9 mm (5/16″)