Separator device

An inlet device comprising:

• an externally screw-threaded bolt defining a generally axially extending passage,
• a valve seating surrounding part of the passage,
• a valve member which is spring biased towards the valve seating to close the passage, wherein the passage includes a screw-threaded region receiving a plug to seal the passage and thereby further prevent the escape of fluid along the passage when this is not desired, the plug having a projection shaped so as to engage and lift the valve member from the valve seating when the plug is fully introduced into the passage and,
• a separator device comprising a housing having an inlet and an outlet, and a magnetic element located within the housing to collect and seperate from a flow of fluid through the housing ferrous particles carried by the fluid, wherein inlet device is disposed in the housing as an air bleed for the housing.