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Translation from German
If necessary, erect warning signs to prevent unin-
tended operation.
Note also the information in sections 1. "Warranty
and liability", 2. "Use of operating instructions",
"Compliance with other rules and instructions",
"Personnel requirements" and 3. "Remaining risk".
Installation instructions DSDU*
The valve as packed consists of several individual
parts, which are packed separately. When remov-
ing the product from the packaging, make sure no
parts fall out. Falling parts may cause injury or be
damaged.
Before installation, check the outer O-rings to en-
sure they are intact and complete. Damaged parts
of O-rings may impair the function of the valve and
must not be installed. Lifting and installation equip-
ment should be used as necessary for installation/
removal.
To facilitate installation and to prevent damage
caused by detachment, all outer O-rings and back-
up rings must be moistened with hydraulic fluid.
Start by inserting the cartridge unit (sleeve, cone,
spring, locating ring) into the hole. Then place the
cover onto the valve and tighten all bolts diagonally
and evenly in several passes, to the torque speci-
fied by the manufacturer. The first time the valve is
pressurised, check the sealing surface for leaks.
Electrical connections
Before commissioning
•
all electrical connections must be made profes-
sionally, using suitable ducting,
•
parts of the machine and individually installed
components must be adequately earthed,
•
all limit switches and control elements must
be properly integrated with the control system.
R_V-DSDU 5715-661 UK.indd 11.12.19
Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
9. Operation
If any of the safety features of the product
are not operational, the system/machine
must be shut down immediately.
Do not carry out any activities that might
jeopardise safety.
Note also the information in sections 1. "Warranty
and liability", 2. "Use of operating instructions",
"Compliance with other rules and instructions",
"Personnel requirements" and 3. "Remaining risk".
10. Troubleshooting
A systematic approach must always be used in the
troubleshooting process. Begin by answering the
following questions:
•
Does anyone have practical experience of
similar faults?
•
Have any of the settings been changed in the
system/machine?
•
Was the system/machine in perfect working
order before the fault occurred?
The following list contains the problems that are
possible in our view:
10
Parker Hannifin Corporation
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