WOB-L pumps

A piston-driven vacuum pump is a type of pump that uses a special piston mechanism to create a vacuum. WOB-L® pumps are robust, oil-free piston pumps with complete accessories, developed for standard applications where corrosion resistance is not required – such as filtration, gas sampling, vacuum drying, and automation.

With flow rates ranging from 0.66 to 12.06 m³/h and an ultimate vacuum between 292 and 6 mbar, WOB-L® pumps stand out for their high performance, reliability, and ease of use. They are known for efficiency, speed, and long service life.

Welch offers a wide range of piston pumps – both single- and twin-head models, built-in and OEM versions – as well as an extensive selection of vacuum pump accessories.