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Allenair transfer pumps are designed around our tandem cylinder design joining two cylinders together with a common head and rod. The total pump unit is divided into two sections; the drive section and the pump section. By utilizing our Valve-In-Head® cylinder as the air motor, the common rod and pump piston will move in unison, creating suction on the lower half of the piston and pressure on the upper half. On the down stroke the check piston moves freely through the fluid in the dip tube.

*All specifications based on model shown (55 gal. drum)

Drum Pumps


Model Series*CV 2 X 8 VCR X 1-1/2 DP
Pump TypeAir Operated, Drum Pump
Air Motor (drive cylinder)
Motor Repair KitCV 2P
Drive cylinder2” BORE
Air Inlet (female)1/4 – 18 N.P.T.
Material InletImmersed
Material Outlet (female)1/2 N.P.T.


Dip tubeStainless Steel
Piston RodStainless Steel
PistonStainless Steel
Standard (refer to option chart)Nitrile
Lower Packing
Dip TubeStainless Steel


Air Inlet Pressure Range25 – 150 p.s.i.
Fluid Pressure Range0 – 255 p.s.i.
Max. Rec’d Cycles / Minute135
Displacement In3 Per Cycle14.13
Volume / Cycle7.82 oz.
Cycles Per Gallon16.3
Flow @ 60 Cycles / Minute3.67 g.p.m. (13.9 l.p.m.)
Max. Flow Rate8.26 g.p.m. (31.2 l.p.m.)
*(Based on water at ambient temp.)

Click Here To View/Download PDF For Linear Pump / Dispensers

Pneumatic Cylinders, Digital feedback air Cylinders, Air Cylinders, Small Bore Cylinders, Valve In Heads Cylinders, Cyl Check Cylinders, Air Clamp Cylinders, Small Bore SS Cylinders, Position Feedback Cylinders, Valves, 4 Way ¼, 3/8, & ½ NPT Valves, 2 Way, 3 Way Solenoid 1/8 & ¼ NPT Valves, 4 Way Direct Acting 1/8 NPT Valves, Time A Valve, Air Switch Valve, 1/8 NPT Poppet Valve