The VBDC 80- series dual cross-over relief valves are built with two direct action relief valves and are used to limit the pressure on both connection lines. Sending pressure to the V port supplies the utility connected to it and the excess pressure is discharged to the V1 port. To adjust the maximum pressure on the V ports, use valve A. Vice versa, use valve B for the same operation on the V1 ports. Pressure adjustment is sensitive to any counter pressure on the discharge line. It is important to stay within the spring calibration range.
|SPRING||A: 5:50 bar - B: 20:260 bar (Standard) - C: 120:350 bar|
|SETTING||screw (Standard), knob, screw+protection cup|
|ON REQUEST||STEEL (VBDC-S-350 bar)|