December 17th is the last day to place orders, resuming on the 4th of Jan 2021

Diaphragm Pumps

Diaphragm Pumps

Comet Diaphragm Pumps & Flojet Diaphragm Pumps

A diaphragm pump (also known as a Membrane pump is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or viton diaphragm and suitable valves on either side of the diaphragm (check valve to pump a fluid.
Employing volumetric positive displacement where the prime mover of the diaphragm is electro-mechanical, working through a crank or geared motor drive, or purely mechanical. When the volume of a chamber is increased (the diaphragm moving up), the pressure decreases, and fluid is drawn into the chamber. When the chamber pressure later increases from decreased volume (the diaphragm moving down), the fluid previously drawn in is forced out.  Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle.
Diaphragm pump characteristics:
  • Have good suction lift characteristics, some are low pressure pumps with low flow rates; others are capable of higher flow rates, dependent on the effective working diameter of the diaphragm and its stroke length.
  • Have good self priming capabilities.

Comet  - 230 volt Diaphragm Pumps   Comet  - 415 volt Diaphragm Pumps   Comet  - Petrol Diaphragm Pumps   Comet  - Bare Diaphragm Pumps with Shafts

Flojet - 12 Volt Pumps   Flojet - 24 Volt Pumps   Flojet - 115 Volt Pumps   Flojet - 230 Volt Pumps


  • COMET Diaphragm Pumps These diaphragm pumps from Comet are for use in spraying jobs and other special use. The MC Series have an integrated pressure regulator and can be electrical or engine driven or supplied with a shaft for electric motor & 4... more info
  • Flojet Electric Driven Diaphragm Pumps A diaphragm pump is a positive displacement pump that uses a combination of reciprocating action and either a flapper valve or a ball valve to transfer liquids. This pump is sometimes referred to as a membrane... more info