Safety Related Notes
Before working on this machine, perform lockout-tagout procedures per the rules of your plant. Determine the sources of energy on this machine – electrical, pneumatic and hydraulic – and release or vent sources of stored energy – electrical capacitors, air receivers, and hydraulic accumulators. Shut off sources of power – electrical, pneumatic and hydraulic. Safely block mechanical sources of energy such as loaded springs and loaded machine members, or safely position the machine members so they are unloaded and springs are not under tension. Beware of hot hydraulic fluid and hot surfaces which can cause burns. Never “crack a hydraulic or pneumatic fitting” to check for the presence of stored energy. Hydraulic fluid injection injuries, as well as injection injuries from many other fluids, are extremely serious and must be treated immediately by medical personnel familiar with this type of injury. Loss of body parts or death may result from improperly treated fluid injection injuries! Never use your hands to feel for a hydraulic leak! Review the schematics and think before proceeding to work on the machine to ensure you have made the machine safe to work on.
Component:
260.09
Description:
Solenoid Vented Pressure Relief Valve
Manufacturer:
Rexroth
Part Number:
DBW20A-2-50/315/4WE6D50/0FG24NZ5L
Stock Code:
Not Provided
Electrical Address:
Not Provided
Component Application:
When Pilot Operated Check Valves 154.35 and 154.33 are closed, this solenoid vented pressure relief valve protects the cap end of the AGC Drive Side Exit Column cylinder on F1 from overpressure. Note the solenoid vent valve portion of this pressure relief valve is detented. The pressure setting may be reduced at anytime by actuating the solenoid vent valve to the crossover flow pattern; when the solenoid vent valve is actuated to the parallel flow pattern, the main stage of the pressure relief valve will remain closed until its pressure setpoint is reached. The solenoid vent valve should be actuated so as to vent the pressure in the cap end of the cylinder before performing maintenance work on the circuit in order to vent high pressure fluid from the cap end of the cylinder.
