91
A
A
A.0500.251 – IM-TL/13.00 EN (08/2009)
11.0 Quench and Flush connections
Several connection types for circulation of quench or flush on the shaft sealing are
possible according to Seal plans 52, 53 and 54.
These connections are applied on TopLobe with single mechanical seal, double
mechanical seal, O-ring seal and hard lip seal types with quench or flush options.
They can be connected in different ways. You will find the schemes on the next pages
regarding seal plans.
Circulation happens by pressure difference or thermosyphon working (i.e. difference in
temperature of the barrier liquid). Direction of flow is reversible but to facilitate venting,
we advise to bring the outlet on top level.
Maximum differential pressure over seal faces (pressure of quench/flush medium):
•
Single mechanical seal, O-ring seal, Hard lip seal
The maximum pressure of the quench/flush medium is 0.5 bar due to the
limitations of the applied lip seal.
•
Double mechanical seal, pressurised
The barrier liquid should have a pressure of at least 1
bar/10% higher than the
differential pressure of the pump.
If you need more information, please contact your local distributor.
11.1 Seal plans
11.1.1 Pump connections in horizontal position
A) Seal plan 54 (circulation) or plan 62 (through flow)
Use a pressurised external barrier fluid reservoir or system to clean fluid to the seal
chamber.
Provide circulation by an external pressure system or pump.
Section A-A