FIELD: measurement equipment.
SUBSTANCE: relief valve, which communicates by fluid medium with an inlet hole, is designed to direct the flow from the inlet hole both to the side of a displacer located downstream and around the displacer.
EFFECT: reduced pre-start length of a calibration device cartridge by means of holding a displacer in place, whilst valves provide for cycle time completion.
15 cl, 16 dwg
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