BALL-TYPE RELIEF VALVE MECHANISM

When the pressure of the fluid in port 1 exceeds the preset value, controlled by the setting of the helical spring, ball 2 is pushed out of its seat, together with its holding member, along guides 3. This overcomes the force exerted by the spring and allows fluid to flow out through port 4. The spring can be regulated by screw 5.
$3600$SHP,Va$