Envco – Environmental Equipment

The Pro-Flo™ patented air distribution system incorporates three moving parts: The unbalanced air valve spool, the pilot spool, and the main shaft/diaphragm assembly. The air valve spool location directs pressurized air to one air chamber while exhausting the other. The pressurized air chamber causes the main shaft/diaphragm assembly to move outward discharging liquid on that side and pulling liquid in on the other side. When the shaft reaches the end of its stroke, the opposite inner piston actuates the pilot spool. The pilot spool location either pressurizes or exhausts the large end of the unbalanced air valve spool. When the large end is pressurized, the piston is forced up so that the air supply is routed through the air valve spool to the right side of the pump. When the large end is exhausted, the piston is forced down so that the air supply is routed through the air valve spool to the left side of the pump. Note: This valve design incorporates an unbalanced spool with the smaller end of the spool pressurized continuously.

Wilden P25 - 6 mm (1/4") Advanced Plastic Pump
FLOW RATE TO 16.7 LPM (4.4 GPM)
MAX PRESSURE = 8.6 BAR (125 PSI)
WETTED HOUSINGS (Water Chambers and Manifolds) Material
Polypropylene
PVDF 2 kg
NON-WETTED HOUSINGS
Center Section Polypropylene
Wetted Parts Polypropylene, PVDF
Air Valve Polypropylene
MAXIMUM SUCTION LIFT CAPABILITY 1.9 m Dry (6.2')
MAXIMUM DIAMETER SOLIDS 2.4 mm (3/32")

Wilden P100 - 13 mm (1/2") Advanced Plastic Pump
FLOW RATE TO 56 LPM (14.8 GPM)
MAX PRESSURE = 8.6 BAR (125 PSI)
WETTED HOUSINGS Material (Water Chambers and Manifolds)
Polypropylene
PVDF 4
NON-WETTED HOUSINGS Material
Center Section Polypropylene
Air Chambers Polypropylene
Air Valve Polypropylene
MAXIMUM SUCTION LIFT CAPABILITY 5.53m (Dry)
MAXIMUM DIAMETER SOLIDS 1.59mm (1/16)

Wilden P200 - 25 mm (1") Advanced Plastic Pump
FLOW RATE TO 221 LPM (58 GPM)
MAX PRESSURE = 8.6 BAR (125 PSI)
WETTED HOUSINGS (Water Chambers and Manifolds) Material
Polypropylene
PVDF
PFA
NON-WETTED HOUSINGS Material
Center Block Polypropylene
Air Chambers Polypropylene
Air Valve Polypropylene
MAXIMUM SUCTION LIFT CAPABILITY 3.6m Dry (11.9)
MAXIMUM DIAMETER SOLIDS 4.76mm (3/16")

Wilden P400 - 38 mm (1 1/2") Advanced Plastic Pump
FLOW RATE TO 455 LPM (120.1 GPM)
MAX PRESSURE = 8.6 BAR (125 PSI)
WETTED HOUSINGS (Water Chambers and Manifolds) Material
Polyproylene
PVDF

NON-WETTED HOUSINGS Material
Center Block Polypropylene
Air Chambers Polypropylenetd
Air Valve Polypropylene
MAXIMUM SUCTION LIFT CAPABILITY 5.5 m Dry (18.2')
MAXIMUM DIAMETER SOLIDS 6.35 mm (1/4")

Wilden P800 - 51 mm (2") Advanced Plastic Pump
FLOW RATE TO 624 LPM (164.9 GPM)
MAX PRESSURE = 8.6 BAR (125 PSI)
WETTED HOUSINGS (Water Chambers and Manifolds) Material
Polyproylene
PVDF

NON-WETTED HOUSINGS Material
Center Block Polypropylene
Air Chambers Polypropylene
Air Valve Polypropylene
MAXIMUM SUCTION LIFT CAPABILITY 6.23 m Dry (20.4')
MAXIMUM DIAMETER SOLIDS 6.55 mm

Ordering Information
Please read manuals for complete ordering information.
P 25 - 6 mm (1/4") Advanced Plastic Pump
P100 - 13 mm (1/2") Advanced Plastic Pump
P200 - 25 mm (1") Advanced Plastic Pump
P400 - 38 mm (1 1/2") Advanced Plastic Pump
P800 - 51 mm (2") Advanced Plastic Pump
P1500 - 76 mm (3") Plastic Pump