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:
261.02
Description:
Solenoid Vented Pressure Relief Valve
Manufacturer:
Rexroth
Part Number:
DBW20A-2-50/315U/4WE6D50/W120/60NZ5L
Stock Code:
Not Provided
Electrical Address:
Not Provided
Component Application:
Located in the low pressure pump circuit Downcoiler hydraulic system, when this solenoid vented pressure relief valve is de-energized, the main stage of the relief valve opens and vents the flow from Pressure Compensated Pumps 003.01 through 003.05 are vented to tank at low pressure. The solenoid vent valve section of this valve must be energized to cause the main stage of the pressure relief valve to close. The pressure relief valve will then relieve excess flow to tank when the setpoint of the pilot stage of the pressure relief valve is exceeded, thereby protecting the P1 main pressure header line.
