KSB HPK-L, Installation & Operating Manual

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6 Commissioning/Start-up/Shutdown
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HPK-L
1136.8/15-EN
NOTE
Only modify the specified sealing concepts and seal types after consultation with
KSB. Due to the complex conditions in hot water systems, the use of mechanical
seals not approved by KSB shall not be covered by KSB's scope of warranty.
Quench reservoir If applicable, fill the quench reservoir in accordance with the general arrangement
drawing.
Double mechanical seal Prior to starting up the pump, apply barrier pressure as specified in the general
arrangement drawing.
6.1.4 Quench liquid supply
Permissible quench liquids The quench liquid must be compatible with and suitable for mixing with the fluid
handled.
For synthetic heat transfer oils, a mineral oil based thermal fluid or another mineral
oil must be used as a quench liquid.
Heat transfer oils of the diphyl group are not suitable for use as quench liquids.
6.1.5 Priming and venting the pump
DANGER
Risk of potentially explosive atmosphere inside the pump
Explosion hazard!
▷ The pump internals in contact with the fluid to be handled, including the seal
chamber and auxiliary systems, must be filled with the fluid to be handled at all
times.
▷
Provide sufficient inlet pressure.
▷ Provide an appropriate monitoring system.
DANGER
Shaft seal failure caused by insufficient lubrication
Hot or toxic fluid could escape!
Damage to the pump!
▷ Before starting up the pump set, vent the pump and suction line and prime
both with the fluid to be handled.
DANGER
Hot fluid spurting out of the vent chamber
Burns, scalding!
▷ Always use utmost caution during the venting process and wear appropriate
protective gear.
1. Vent the pump and suction line and prime both with the fluid to be handled.
2. Fully open the shut-off element in the suction line.
Venting the seal chamber In as-supplied condition, auxiliary connection 13 D for venting the seal chamber is
closed with screw plug 903.85.
High-temperature pumps must be vented before they are commissioned.
For venting undo screw plug 903.85 by half a turn to one turn maximum. Leave it
open until the gas has left the mechanical seal chamber and fluid starts to escape.
Then, tighten the screw plug again.