Compressed air drives two opposed diaphragms. No motor, no seal, no electrical supply — which makes the AODD the default where power is awkward or the area is classified.
The Yamada NDP series handles solids-laden, corrosive and shear-sensitive product across a wide materials range.
An AODD can be dead-headed and run dry indefinitely without damage, and it self-primes from a dry start — which is why it survives duties that destroy other geometries.
Dead-head it, starve it, leave it running. Nothing burns out.
Air-driven throughout — suits classified and remote areas.
No mechanical seal to fail, no gland to maintain.
Passes laden product that would block a tighter geometry.
Moves between duties with an air line and a suction hose.
Three other ranges that may suit the duty better.
Viscous, abrasive and shear-sensitive liquid media at consistent, low-pulsation flow.
Pulsation-free, low-shear transfer with flow independent of pressure.
High-volume output and durability in heavy-duty transfer duty.
Send a duty point, a failed part number, or a drawing. We will come back with a sized selection and a lead time.