Start-Up; Starting Up The System; Operation; General Information About Operation - Leser 4401 Instrucciones De Servicio

Operating Instructions
• The system has been flushed in order to
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make sure that no impurities or foreign
objects have got into the safety valve.
• For safety valves without a test gag, the
pressure test of the system is performed
with a blind flange or sealing plate.
Procedure
• Secure the safety valve.
• If there are support brackets, then they
must be used.
• Attach the supply and discharge lines.
Use adequately dimensioned gaskets.
• If necessary, provide drainage
for the discharge line.
• If necessary, place a drainage opening
at the lowest point of the discharge line.
• Remove securing devices from
the safety valve.
» The safety valve is now installed.
7

Start-Up

7.1 Starting up the System

Different steps are required for the start-up,
depending on the system and type of safety
valve. Only the essential steps for start-up
are summarised and given in the following
handling instructions. The handling instruc-
tions are only intended to provide a rough
orientation.
Prerequisites
» The safety valve is installed.
15
Procedure
1. Perform a pressure test on safety
valves with a test gag.
2. Check the position of the venting lever.
3. Remove the test gag.
4. Secure the blow-off chamber.
5. Start the system slowly, and increase
the pressure slowly but not up to the set
pressure.
6. Check the safety valves and connec-
tions for leaks.
» The system is now in operation.
8

Operation

8.1 General Information about Opera-
tion
During operation, the operability of the
safety valve must be checked regularly.
For pilot-operated safety valves, the pi-
lot lifting device, the main valve lifting de-
vice or the pilot test connector (FTC) can
be used for testing the set pressure. The
test connector must always be accessible
(only B).
Safety valves must be vented to test their
operation. Safety valves can be vented as
of an operating pressure of 75% of the set
pressure. The maintenance intervals must
be taken from the regulations and rule
groups.
With regard to the closing pressure dif-
ference, the 810 series POSV can be set