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INOXPA Tank Bottom Seat Valve NLF


The NLF valve is a pneumatically actuated single seat valve designed for assembly at the bottom of the tanks in the dairy, food-processing industries, beverage production, pharmaceutical and fine chemicals industries.

Operating principle

The seat valves are actuated by a single- or double-acting actuator. The shaft is actuated by the supplied compressed air and opens or closes the valve. Possible configuration of the valve: the valve seat opens into the valve to avoid accidental openings in case of overpressure in the line and to avoid possible contact with the product recovery scrapers.

Design and features

  • Total drainage prevents the stagnation of the product.
  • Normally closed valve (closed by spring) – standard version.
  • Normally open valve (opened by spring) by a simple turn of the pneumatic actuator.
  • The valve seat opens into the tank to avoid accidental openings in case of excessive pressure in the tank.
  • 360º adjustable body, even after welding the flange to the tank.
  • Open lantern for visual inspection of the shaft sealing.
  • Easy disassembly by loosening the clamp.
  • Connections: weld (mm or inches).


Parts in contact with the product                                     AISI 316L
Other stainless steel parts                                                  AISI 304
Gaskets                                                                                   EPDM according to FDA 177.2600
Internal surface finish                                                         Ra ≤ 0,8 μm
External surface finish                                                        Bright polish


  • Manual actuation.
  • Steam barrier (if shaft sterilisation is required).
  • C-TOP control unit.
  • Jacketed body.
  • Larger actuator sizes.
  • Internal surface finish: Ra ≤ 0,5 μm.
  • Gaskets: NBR or FPM.
  • Connections: DIN, Clamp, SMS, RJT, FIL-IDF, etc.
  • Double-acting actuator.
  • “Twin-Stop” actuator.
  • External position sensors.

Technical specifications

Keeping you processing

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