93
A
A
A
A
A.0500.251 – IM-TL/13.00 EN (08/2009)
B) Seal plan 52 – Unpressurised double seal
Use an external reservoir to provide unpressurised buffer fluid
Reservoir
Valve
11.1.2 Pump connections in vertical position
A) Seal plan 54 (circulation) or plan 64 (through flow)
Use a pressurised external barrier fluid reservoir or system to clean fluid to the seal
chamber.
Circulation is to be provided by an external pressure system or pump.
Section A-A
Section A-A