You're viewing this item in the new Europeana website. View this item in the original Europeana.

UNLOADING VALVE MECHANISM WITH A LOCKING MEMBER

When the pressure in the system exceeds a preset value, controlled by the force exerted by helical spring 2, piston 1 is lifted, compressing spring 2. This disengages wedge-shaped pin a from piston 3, connecting the system to the tank so that its pressure drops. Piston 3 is returned to its initial position by depressing knob b.
$3620$SHP,Va$