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A chemical diaphragm pump is a type of positive displacement pump that uses a flexible diaphragm to move vapors without contamination. Welch offers a wide range of chemical-resistant diaphragm vacuum pumps that are designed to handle corrosive or aggressive media. These dry-running pumps ensure clean, completely oil-free operation, outstanding durability and reliability, as well as a low total cost of ownership.
Our offering comprises pumps with various flow and vacuum ranges, as well as multiple configurations to address the needs of a large number of processes. We provide diaphragm vacuum pumps with one, two, four or eight heads. Our portfolio includes both single-stage and multi-stage models, with (ecoflex pumps) and without pumping speed control.
Thanks to the use of PTFE heads, perfluoroelastomer valves and fluorinated plastic wetted surfaces, the pumps are defined by their superior resistance to aggressive solvents and acid vapors. Special X2 versions with higher grade seals and thicker coatings are available for applications in which the pump needs to handle particularly harsh chemical vapors.
Apart from outstanding technical specifications and build quality, Welch chemical diaphragm pumps are characterized by their quiet operation and very low vibration levels, which make them the perfect fit for various laboratory settings. Their low-weight compact designs mean they can be easily moved between locations and thus be used in many different applications.
Thanks to the state-of-the-art ecoflex feature, you can vary the pumping speed and adjust the vacuum precisely according to your individual needs. This results in more efficient and more reproducible processes. Using ecoflex pumps allows for reducing operational costs by up to 80%.
Welch’s chemical-resistant diaphragm vacuum pumps provide you with a number of benefits to help you improve and streamline your mission-critical vacuum processes. They include:
Welch’s chemical-resistant diaphragm vacuum pumps are used in numerous laboratory and industrial applications where they support processes such as:
About Welch Vacuum
Welch is a recognized provider of vacuum pumps, systems, and fittings for industrial, life sciences, and laboratory applications. We design, manufacture, and deliver products meeting the strictest requirements for mission-critical applications, and provide a comprehensive offering of products and great engineering capabilities to fit our customers’ needs.
As a reliable and trusted partner for OEMs, we stand up to the challenge of supplying best-in-class products and solutions on time to manufacturers of equipment in the life sciences, healthcare, and industrial segments.