M4™ Sampling Valve

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The M4 sampling valve is the smallest Keofitt® valve, designed for sampling of low viscosity products, with particles up to 1.5mm in diameter. The main product range the M4 valve is used for has 0-100cP viscosity.



The M4 valve is used in a range of applications such as breweries, dairies, pharmaceutical and biotechnological industries, with wide range of products such as:

  • Water
  • Milk
  • Medical solutions
  • Filtered beer
  • Perfume
  • Olive oil
  • Fermented products
  • Fruit juice
  • And much more


Technical Data

Temperature range:Rubber membrane:0 to 130ºC / 32 to 266ºF
PTFE membrane:0 to 150ºC / 32 to 302ºF
Process line pressure 
(inside tank or pipe):
Valve head type H, Q, K and N:0 to 6 bar(g) / 0 to 87 psi (g)
Valve head type B:0 to 12 bar(g) / 0 to 174 psi (g)
Material: Steel parts:316L*
Membranes:PTFE, Silicon and EPDM
FDA approved
Dimensions:Process dimensionIn-/outlet dimension
Body surface:Inner surface Ra < 0,5 μm/20 μinchElectropolished outside
Material certificate:3.1
*Other materials available on request


Click here to download the Keofitt M4 sampling valve manual