KSB HPK Series User Manual

6 Commissioning/Start-up/Shutdown
39 of 80
HPK
1121.8/06-EN
The following seal designs are used for hot water applications:
(ðSection4.5,Page17)
▪ Mechanical seal with external circulation
▪ Mechanical seal with air-cooled heat exchanger
6.1.3.2 Mechanical seal for thermal oil
DANGER
Improper sealing!
Severe burns! Damage to the environment!
▷ Use only mechanical seals for sealing off thermal oil > 100 °C.
DANGER
Quench supply
Serious injury!
▷ Only operate quench supply systems outdoors, far away from persons and
potential sources of ignition.
CAUTION
Contamination, deposits of cracked products and carbon residues on the seal faces
Damage to the mechanical seal!
▷ Mechanical seal must only be operated with quench supply.
To prevent deposits of cracked products and carbon residues (from carbonised oil) on
the seal faces, use only mechanical seal systems designed to prevent contact between
oxygen and the mechanical seal faces.
The following seal designs are used for thermal oil applications:
(ðSection4.5,Page17)
▪ Single-acting mechanical seal with steam/nitrogen quench
If steam quench is used, the steam quench feed rate must be adjusted so that
only a small plume of steam escapes between the shaft protecting sleeve and the
throttling bush.
– Quench medium: steam (max. 160 °C) or nitrogen
– Required feed rate: approx. 1 kg/hour
– Required pressure: 0.1 bar max. (observe any additional information given in
the general arrangement drawing!)
▪ Mechanical seal in tandem arrangement with quench liquid
In mechanical seal systems in tandem arrangement the outboard mechanical seal
serves as safety back-up seal designed to provide temporary sealing if the
inboard seal fails.
The mechanical seal system must be supplied with a quench liquid (typically cold
thermal oil) in order to dissipate the friction heat generated at the seal faces of
the outboard mechanical seal and to prevent the seal faces of the inboard
mechanical seal from coming into contact with atmospheric oxygen. This is
usually assured by means of a quench pot.
Quench pot installation and operating mode see supplementary sheet.

KSB HPK Series Specifications

General

Brand	KSB
Model	HPK Series
Category	Water Pump
Language	English