During an AODD wet-end rebuild, center disk orientation and material matter. Installing a non-beveled face against the diaphragm—or reversing air-side and wetted-side disks—can accelerate abrasion, corrosion and premature diaphragm failure.

AODD pumps can tolerate dry running, but that doesn’t mean it should become normal operating practice. This article explains how dry running can accelerate component wear, increase compressed-air consumption, and raise maintenance costs—and outlines practical ways to prevent it using dry-run protection devices, liquid level controls, and pump controllers.

Water hammer is one of the more common—and costly—issues encountered in industrial pumping systems. In simple terms, water hammer is a sudden pressure surge within a piping system caused by a rapid change in fluid velocity.

Yamada makes drum pumps in 3 port sizes. The 3/8” pump is available in Aluminum and Stainless Steel. The 1/2” pump is available in Polypropylene or Kynar. The 3/4” pump is available in Polypropylene, Aluminum or Stainless Steel.

I receive many calls from end user’s telling me that their pump has failed from dry running . Upon further investigation I find out that their problem is with a competitor’s piston pump, not an air operated double diaphragm pump.