KSB Amarex KRT Installation & Operating Manual page 48

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7 Servicing/Maintenance
7.5.3 Reassambling the motor section
NOTE
Before reassembling the motor section, check that all joints relevant to explosion
protection (flamepaths) are undamaged. Any components with damaged
flamepaths must be replaced. Only use original spare parts made by KSB for
explosion-proof pumps. Observe the flamepath positions specified in the
Annex.Secure all screwed/bolted connections closing off the flameproof enclosure
with a thread-locking agent (Loctite type 243).
DANGER
Wrong screws/bolts
Explosion hazard!
▷ Always use the original screws/bolts for assembling an explosion-proof pump
set.
▷ Never use screws/bolts of different dimensions or of a lower property class.
7.5.4 Leak testing
After reassembly, the mechanical seal area/lubricant reservoir must be checked for
leakage. The leak test is performed at the lubricant filler opening.
Observe the following values for leak testing:
▪ Test medium: compressed air
▪ Test pressure: 0.8 bar maximum
▪ Test duration: 2 minutes
Fig. 24: Screwing in the testing device
1. Unscrew and remove the screw plug and joint ring of the lubricant reservoir.
2. Screw the testing device tightly into the lubricant filler opening.
3. Carry out the leak test with the values specified above.
The pressure must not drop during the test period.
If the pressure does drop, check the seals and screwed connections.
Repeat the leak test.
4. If the leak test has been successful, fill in the lubricant.
7.5.5 Checking the connection of motor/power supply
Once reassembly has been completed, carry out the steps described in (⇨ Section
7.2.1 Page 39) .
Amarex KRT
P
0,8 bar