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Sampling Valves

Since 1974 FAMAT has developed and manufactured a complete range of “Dead Zone Free” Sampling Valves, based on the patented EPT concept : Expanding Piston Technology.

Almost all FAMAT Valves are based on our patented EPT: Expanding Piston Technology.

The patented system inside this piston allows the PTFE external coat to expand and insure a perfect tightness from vacuum up to Full rating pressure 10 bar (145 psi).

The advantage of having an expandable piston inside the valve is to eliminate the need for O-rings that can be damaged during valve operation, and consequently generate contamination for production.

Another big advantage of our design is that in closed position, the piston will be flush with the connection point, leaving no dead space.

  • DEAD ZONE FREE
  • GUARANTEED BUBBLE TIGHT
  • GASKET FREE

expanding piston

Picture1 - EPT

CLOSED POSITION
The piston is even with the reactor or dryer, leaving no dead space (Picture 1).
A perfect seal is formed directly by the piston (in green) against the body of the valve.

Picture2 - EPT

SAMPLING PROCEDURE
Turn the handwheel counter clockwise to lower the piston to its open position.
While the product flows down into the sampling bottle, the operator can check the quantity of the product through the sight glass (Picture 2 ).

Picture3 - EPT

Turn the handwheel clockwise to bring back the piston in its closed position.
A firm final turn of the handwheel gives reliable sealing and no dead space.
Equalize the pressure (or vacuum) in chamber by opening the purge valve.
Remove the sampling bottle on its quick coupling connection (Picture 3 ).