Vogelsang VX100Q - Draining and Flushing the Buffer Chamber

Rotary lobe pump
Operating instructions
VX100Q/VX136Q/VX186Q, VX136QD/VX186QD, VX136QDM2/VX186QDM2
32/61
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We recommend the flushing operation as specified in  Fig. “Flushing operation - parallel":
• Every cartridge mechanical seal is flushed with clean flushing fluid.
• A possible defect of the single cartridge mechanical seal is detected.
Alternatively, the flushing operation can be done as indicated in  Fig. “Flushing operation - in series":
• Flushing fluid is supplied only via the lower flushing inlet and reaches the upper flushing outlet via the
two cartridge mechanical seals.
Note with this alternative flushing operation:
A possible defect cannot be assigned to the single cartridge mechanical seal.
Possible impurities of the cartridge mechanical seal rinsed for the first time can get into the
subsequent mechanical seal.
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7.1.4 Draining and flushing the buffer chamber
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• If cartridge mechanical seal is defective, empty and clean the buffer chamber.
• Before changing a cartridge mechanical seal, drain the buffer chamber and clean it if it is
contaminated severely  chap. “Changing cartridge mechanical seal"
Chap. “Maintenance plan"
Procedure:
1. In case of buffer chamber assemblies with a pressurised buffer fluid tank or pressure valve,
depressurise the buffer chamber before draining or cleaning.
2. Remove buffer chamber assemblies  Fig. “Buffer chamber assemblies".
3. Loosen the hex head screw plug (6)  Fig. "Pump with quenching fluid tank, without pressure valve"
and drain the buffer or quenching fluid out of the buffer chamber.
4. If there is heavy soiling, clean the buffer chamber.
5. Screw the lower hex head screw plug back in (tightening torque: 60 Nm) and install the various buffer
chamber assemblies in reverse order.
If the bottom hex head screw plug is not accessible from the installation position, an extended
connection can be installed at the side on request .
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Vertical pump installation
Our “Technical Information TINF.PU.019.xx” contains information about the filling and emptying of the
gearbox and the buffer chamber when the pump is installed vertically.
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