Diaphragm / Piston

A critical component in precision metering pump assemblies, the diaphragm or piston functions as a flexible or rigid moving element that displaces fluid with high accuracy. It creates a sealed chamber that expands and contracts to draw in and expel precise volumes of liquid, ensuring repeatable dosing in applications requiring exact flow control. This component is engineered to maintain integrity under varying pressures and chemical exposures while minimizing pulsation and wear.

Operates through reciprocating motion driven by a mechanical or hydraulic actuator. In diaphragm designs, a flexible membrane flexes to change chamber volume, isolating the fluid from the drive mechanism. In piston designs, a solid plunger moves linearly within a cylinder, directly displacing fluid. Both types rely on precise stroke control and sealing to achieve accurate volumetric displacement per cycle.