SPX TG H15-50, Instruction Manual, Page: 78 / 110

78
2080 3010 2500
fixing set screws
black jig
black jig
IN
OUT
IN
IN
OUT
OUT
OUT
IN
G1/4
G1/4
G1/4
G1/4
A.0500.351 – IM-TGH/07.02 EN (10/2015)
C. Double Mechanical seal cartridge Burgmann DN3
1. Position the cartridge according to fig DN3.
2. Position the G1/4 openings marked OUT and IN according to the direction of rotation of the
pump shaft. To define the exact direction of rotation look on the pump shaft (see also 3.18.4).
The OUT opening must be positioned at the highest top position to allow evacuation of air and
gases.
3. In case the pump shall run in both directions of rotations the OUT and IN opening shall be
placed following the most used or most critical direction of rotation. In case of doubt consult
your supplier or Burgmann.
4. Always provide a liquid quench.
If the liquid quench is non-pressurized or the pressure is lower than the pressure in the shaft seal
box the double mechanical seal acts as a tandem seal arrangement.
If the liquid quench is pressurized the double mechanical seal acts as a back to back
arrangement. In such cases the pressure of the liquid quench must be 10% higher than the
maximum pressure in the shaft seal box.
Do not give too much over pressure i.e. 1.5 bar above pressure of the shaft seal box is
recommended as maximum.
Under normal circumstances the pressure in the shaft seal box is equal to the suction pressure
plus the half-differential pressure (
∆
p). In case of doubt measure the pressure in the shaft seal
box or consult your supplier.
5. For arrangement of liquid quench see 3.18.8.3 (non-pressurized quench) and 3.18.8.4
(pressurized quench) or consult your pump supplier or Burgmann.
Remark: Double cartridge mechanical seals can also be delivered for gas quench
(= special execution). In such cases, follow the special instructions that will
be received with the cartridge.
D. Triple lip-seal cartridge
The entire cartridge can be disassembled from the bareshaft pump as one single seal unit.
Further disassembly of the unit requires an SPX service intervention and/or support.
Fig DN3 – View on arrow X
• Remove black jig (1x) before fixation of shaft sleeve
(allows shaft sleeve to rotate).
• Remove non-coloured jigs (3x) after pump assembly
and adjusting axial clearance.