Diaphragm Vacuum Pumps

Welch diaphragm vacuum pumps offer a number of advantages compared to oil-based vacuum pumps and competing diaphragm pumps.

Completely oil-free operation
The diaphragm pumps operate without oil, which eliminates the risk of oil contamination of samples and processes. Particularly critical in industries where product purity is essential, such as pharmaceuticals, biotechnology and the food industry.

Low cost of ownership
The absence of oil significantly reduces maintenance requirements — no oil changes, no oil mist filters and fewer service intervals. The result is lower operating costs and higher uptime.

Chemical resistance (MPC series)
PTFE diaphragms and carbon fibre reinforced heads make the MPC series resistant to aggressive solvents and acid vapours. The electrical conductivity of the carbon fibre material prevents electrostatic charging and fire risk.

Quiet operation
Noise level of 45–55 dB(A) — comparable to a quiet conversation — makes the pumps well suited for open laboratories and office environments.

Wide model range
From compact single-head models (MP065E, 0.7 m³/h) to large industrial Univac systems (up to 45 m³/h) — Welch has a diaphragm pump for every application and capacity.

Precise vacuum control (controlled models)
BTpro, MXPC and LVS models are equipped with vacuum control that allows you to adjust pump speed precisely. Operating costs can be reduced by up to 80% compared to uncontrolled models.

Compact and portable
Low weight and small footprint make most models easy to move between different applications and workstations.