Seepex BW 10, Operating And Maintenance Instructions Manual

Page: 148 / 186

Operating Manual
MG1/dw-00
page 16 / 20
en MG1/dw-00 / June 13, 2006 Rev. 10.1
OPERATION
Instructions for safe operation
For a single mechanical seal the pressure in the seal chamber (stuffing box
pressure) has to be higher than the ambient pressure at the machine at any time.
Otherwise the machine will suck in air via the sliding faces, which will result in dry-
running and consequent failure of the mechanical seal.
Damages due to dry-running are excluded from the warranty.
During every state of operation the mechanical seal has to be constantly wetted by
the medium to be sealed in its liquid form , in particular when the machine is
started or stopped . The machine design has to be such as to take this necessity into
consideration.
If the medium to be pumped builds deposits or tends to solidify during cooling down
or standstill of the machine the stuffing box has to be flushed with suitable clean
liquid. The flow and the liquid should be determined by the user.
If the operation limit values and the instructions given in this manual are followed a
trouble-free operation of the mechanical seal can be expected.
Instructions for start up
Safety checks before start up
•
Torque transmission between mechanical seal and shaft duly installed
•
Supply connections tightened pressure-sealed
•
Disposal connections installed environmentally safe
For a safe operation of the mechanical seal we recommend to apply at inboard the
most suitable type of circulation described in API 610 / 682 . This measure protects
the seal cavity from deposition of solids.
•
Flood machine and seal cavity (stuffing box) with medium and vent thoroughly.
!
Now the seal is ready for operation.