KSB HPK-L, Installation & Operating Manual

Page: 37 / 74

6 Commissioning/Start-up/Shutdown
37 of 74
HPK-L
1136.8/15-EN
13 D
Fig. 19: Auxiliary connection 13 D
13 D Screw plug 903.85
NOTE
We recommend replacing the screw plug with a globe valve and drain line, so that
gases and hot fluids pumped can be drained safely during the venting process.
Venting during pump
operation
1. Switch off the pump and let it run down to a standstill.
2. This allows the gases to escape reliably.
3. Close the shut-off elements as required by the system configuration.
4. To vent the bearing bracket undo screw plug 903.85 in steps of approx. 1/2 turn
each until no more gas escapes.
Excessive venting Excessive venting shall be avoided, as hot product from the piping system will flow
through the volute casing into the mechanical seal chamber and result in an
inadmissible heat build-up in the mechanical seal. Close the vent plug as soon as no
more gas escapes.
6.1.6 Final check
1. Remove the coupling guard and its footboard, if any.
2. Check the coupling alignment; re-align the coupling, if required.
( ð Section 5.5, Page 28)
3. Check proper functioning of coupling/shaft.
Check that coupling/shaft can be easily rotated by hand.
4. Fit the coupling guard and its footboard, if any.
5. Check the distance between coupling and coupling guard.
The coupling guard must not touch the coupling.
6.1.7 Cooling of the mechanical seal chamber
The mechanical seal chamber is integrated in the bearing bracket and cooled by the
ambient temperature via cooling fins.
An integrated fan impeller ensures a continuous cooling air flow.
An unobstructed supply of cooling air to the fan hood and fan impeller must be
ensured at all times!
1. In exceptional cases, the pump can be operated without the integrated fan
impeller.
If the coarse dust blocks the cooling air intake, the following parts also have to
be removed:
▪ Fan hood 832
▪ Guard 680
Cooling air flow with a cooling air velocity of at least 4 m/s must be provided in the
proximity of the cooling fins.
The cooling air flow is generated by the motor cooling device or an external fan.