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Start up
Checking for cleanliness
Perform initial commissioning
Checking for leak-tightness
The following parameters serve as a
guideline for the operator, although other
or supplementary measures may be
needed depending on the installation site:
20
Injection valve or vacuum breaker
n
Test: Loosen the discharge line on the metering pump and observe if
liquid is forced back.
Collecting pan (to be provided on site)
n
Test: Fill with water and check for water tightness. Then remove the
water again.
Guard plate (optional)
n
Test: Check to ensure it is still sufficiently sturdy.
Emergency stop switch (to be provided on site)
n
Test: Press the emergency stop switch while the pump is in operation.
The pump must come to a standstill.
CAUTION!
Warning catalytic decomposition
Dirt can trigger catalytic decomposition with hydrazine.
–
Check that the system is free of dirt and contamina‐
tion.
Check that the system is free of dirt and contamination.
Initial commissioning together with the acceptance test is under‐
taken in Germany in accordance with the principles set out in
"Admission of closed decanting and metering systems for aqueous
solutions of hydrazine", according to BBG-907/1999.
1.
If hydrazine has already been present in the system, flush it out -
see chapter "Decommissioning".
2.
Carefully meter the resulting solution into the application.
3.
Close the active carbon filter with a blanking cap.
4.
Close the screw lid on the dosing tank.
5.
Open the stopcock on the metering vessel.
6.
Close the stopcock for diluting water.
7.
Remove the threaded connector on the diluting water connection.
8.
Screw the T-piece with manometer and compressed air connector
on to the diluting water connector of the hydrazine metering system.
9.
Adjust the pressure reduction valve of the compressed air supply to
a test pressure of 80 mbar.
10.
Open the diluting water stopcock and fill the complete hydrazine
metering system with compressed air until the manometer displays
a constant 80 mbar. Close the stopcock on the testing fitting. The
test duration is 5 minutes.
11.
Check the closed screw lid of the storage tank of the hydrazine
metering system as well as the stirrer and its storage tank opening
for leaks (leak spray).
12.
Check the fastening points for the foot valve support pipe and the
level switch as well as the openings for the suction lines and the
level switch cable for leaks.
13.
Check the flange of the storage tank flange for the metering vessel,
the fixing bolts, all openings for the diluting water lines, the aerating
and bleed lines and the filling line (with stopcock) for leak-tightness.
14.
Check the complete top part of the storage tank and the fastening
points of the fastening plate of the metering and transfer pumps for
leak-tightness.
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