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Coaxial steam sterilizable design with separate inlet for SIP and CIP: The reference for hygienic and microbiological sampling for four decades, this is the original, in-situ sterilizable sampling valve that continues to revolutionize the field of sterile sampling.

Classic M4

The Keofitt Classic M4 Sampling Valve is the smallest Keofitt valve available. It is designed for the sampling of low viscosity products in the range of 0-100 cP with particles less than 1.5 mm in diameter.

This valve is used in a range of industries such as brewery, dairy, pharmaceutical and bio-tech for products such as:



Medical solutions

Filtered Beer


Olive Oil

Besides the selection of the Valve Body and the Valve Head there are three different membrane materials to choose from: Silicone, EPDM and PTFE.

Accessories include quick couplings for the connection of tubing, piping and more.

Complete Classic M4 overview

M4 Products