Diaphragm pumps work by reduction of a volume using a flexible membrane driven by a crank.

	Flow from 0.2 l/min to 91 l/min
	Suitable for pressure and vacuum
	High efficiency
	Oil-less Sealed chamber ideal for use with aggressive media
	Fluid capability with smaller models

Technical Overview
In dry running diaphragm pumps, a flexible diaphragm in the pump head is moved up and down, via the conrod, by the action of an eccentric on the motor shaft. On the downstroke, air is drawn into the pump chamber, and expelled on the upstroke. One-way flap valves mounted within the pump head control the direction of flow of air. Equally suitable for use as a vacuum pump or compressor, they are characterised by low noise, high efficiency and gas tightness.

Models are available with AC or DC drive, and are available in single and multiple head models which can be configured in series or parallel, with vacuum to 1 mbar abs, pressure to 2.8 bar, and flow rate in the range from 0.3 l/min to 90 l/min.

Diaphragm pumps are ideally suited to applications where the attributes of efficiency and gas tightness are important, such as sampling pumps for portable gas detectors, within gas analysers, medical autoclaves, for various laboratory applications or wherever efficient, compact vacuum pumps or compressors are required.