Home » Inoxpa Process Valves » INOXPA Shut-off Seat Valve N/M

INOXPA Shut-off Seat Valve N/M


The N/M shut-off valve is a hygienic single seat pneumatically operated valve with a wide range of applications in the food-processing, pharmaceutical and fine chemicals industries.

Operating principle

Seat valves are automatically operated by a single-acting or a double-acting actuator. Compressed air moves the shaft to place the valve in the “open” or “closed” position. The 180º rotation of the pneumatic cylinder of the single-acting actuators allows to have a normally open or normally closed valve.

Design and features

  • Compact and robust design.
  • Normally closed valve (NC) in the standard version.
  • The valve can be changed to normally open (NO) by simply reversing the position of the pneumatic actuator.
  • Weld connections (mm or inches).
  • Available sizes: from DN 25/1″ to DN 100/4″.
  • Easy disassembly of internal parts by loosening the clamp fastener.
  • Open lantern to allow visual inspection of shaft sealing.
  • 360º adjustable body


Parts in contact with the product                      AISI 316L
Other St.St. parts                                                  AISI 304
Gasket                                                                     EPDM according to FDA 177.2600
Internal surface finish                                         Ra ≤ 0,8 μm
External surface finish                                        mirror polished


  • Double-acting pneumatic actuator.
  • Manual actuation.
  • Gaskets: FPM. All of them according to FDA 177.2600.
  • Connections: DIN, Clamp, SMS, RJT, FIL-IDF, etc.
  • “Twin-Stop” actuator.
  • C-TOP control unit.
  • External position sensors.
  • Steam barrier (if shaft sterilisation is required).
  • Jacketed body.
  • Surface finish: Ra ≤ 0,5 μm.

Technical specifications

Configurations of bodies

Keeping you processing

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