• NC:

    Normally closed solenoid valve/solenoid operator is closed in the Currentless state

  • NO:

    Normally open solenoid valve/solenoid operator is open in the Currentless state

  • Nominal flow rate:

    See flow rate

  • Nominal opening size:

    Describes the size of flow opening for the medium at the valve inlet


  • Operating mode:

    vertical, horizontal

  • Operating pressure:

    Sum of all forces exerted by a gaseous medium on the container wall (armature system/valve system)

  • Operating voltage:

    Voltage at which the solenoid valve may be brought into operation according to specifications


  • Power Class:

    Gives the power in Watts for DC and in Volt-Amperes for AC necessary to operate a valve according to the nominal opening size/pressure.

  • Pressure regulator:

    Valve for setting the required pressure (e.g. Inlet 10bar – Outlet adjustable from 3–10bar)

  • Class of protection:

    See Ex-information sheet

  • PTB:

    German Federal Institute of Physics and Metrology; Certification Institute

  • Pulling force:

    (Lifting force according to VDE 0580) Magnetic force that acts outwardly under consideration of the associated mass components of the armature


  • Seal insert:

    Elastomer made of different materials used as the sealing material

  • Shut-off valve, pilot-operated:

    Shuts off the flow of the medium

  • Solenoid Coil:

    Component that consists of the excitation winding and bundles and directs the magnetic flux.

  • Solenoid valve:

    A unit which, on account of its construction and the governing technical data, is suitable for actuating valves for liquids and gases

  • Steady-state excess temperature:

    Difference between the temperature of the solenoid coil and the ambient temperature once temperature equilibrium has been attained in the switched-on state. After 60 minutes as a rule, see VDE 0580


  • Temperature Class:

    Gives the maximum permissible surface temperature in classes above Class II according to EN 50014

    • T3 = 200°C
    • T4 = 135°C
    • T5 = 100°C
    • T6 = 85°C

  • Temperature:

    Given in degrees Centigrade (for ambient temperature, upper and lower limit temperature, self-heating)

  • Thermoplast:

    Plastic used for moulding plastic parts (recyclable)

  • Throttle check valve:

    A throttle check valve combines two different functions: throttling and prevention of return flow

  • Tightness:

    Leakage/time unit; non-desired quanitity of the gaseous medium that escapes in the switched-on or switched-off state of a valve during a time interval