W9™ Sampling Valve

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The W9 is the standard Keofitt® sampling valve, the valve others are measured to. Designed for sampling medium viscosity products, with particles up to 3 mm in diameter, if fitted with PTFE membrane and 2mm when fitted with silicone or EPDM membrane. W9 valves are mostly used for products that have about 0-1,000cP in viscosity.



The W9 valve is used in a range of applications such as breweries, dairies, pharmaceutical and biotechnological industries, with wide range of products such as:

  • Unprocessed milk
  • Medical solutions
  • Filtered and unfiltered beer
  • Perfume
  • Cream and lotions
  • And much more

The W9 valves come with a variety of valve bodies and heads that fit most situation. The bodies come with welded or clamp connection, the heads come with diffrent operations and membranes.


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 in- and outside
Material certificate:3.1
*Other materials available on request


Click here to download the Keofitt W9 sampling valve manual