13
6.6
Connection of Sealing or Quenching Liquid
(Optional)
In versions with double shaft seal, the seal chamber must be
flushed with a sealing or quenching liquid.
►
Use a suitable medium, e.g., water, as a sealing or quenching
liquid.
6.6.1
Installing the pipelines
1. Install and seal the supplied flushing tubes.
2. As a standard, the feed line should be fitted at the
bottom
of the shaft seal.
3. As a standard, the return line should be fitted at the
top
of
the shaft seal.
Fig. 19
Installing the pipelines
4. Install the following valves into the pipelines:
– Install the sight glass in the return line.
6.7
Cleaning
Only use cleaning agents that comply with the hygiene
guidelines for the respective pumping medium.
1. Before sealing the pump ensure that there are no foreign
objects inside the pump or pipes.
2. Seal the pump.
3. Connect the pipes.
4. Thoroughly clean the pump and the pipe system before ini-
tial use.
7
Operation
7.1
Safety Instructions
►
Danger of burning: Pumping of hot media can cause the
pump to become very hot. Check the temperature before
touching the pump.
►
Noise emissions: The A-weighted sound pressure level of the
pumps can be greater than 80 dBA. Always wear ear
protectors in the vicinity of the running pump.
►
Danger of bursting: If the allowable pressure and
temperature ranges are exceeded, the pump may burst or
become leaky. The pressure and temperature ranges for the
pump must be complied with; see “
Order-Related
Documents
“
in the attached documents.
►
Danger of bursting: Cold extinguishing agents used to
extinguish a pump fire can cause the hot pump to burst. Do
not cool the pump down excessively when extinguishing the
fire.
►
Pump running in reverse direction despite emergency shut-
off: If the pump is shut off using the emergency shut-off
function, it will run in reverse direction due to the pumping
medium in the discharge line. Install a check valve in the
discharge line.
►
Destruction of shaft seal when pump runs in reverse
direction. Reverse running destroys the springs in the shaft
seal. Always operate the pump in the direction of rotation.
See
Chapter 2.4.1, "Direction of Rotation," page 6
.
7.2
Commencement of Operation
Damage to Shaft Seals
If the pump runs without a pumping medium, the mechanical
seal will be damaged.
►
Ensure that the pumping medium always reaches the upper
edge of the outlet side before and during operation.
Damage to Double Shaft Seals
If the pump runs without a sealing medium, the shaft seal will
be damaged.
Ensure that during operation:
►
The sealing liquid flows with the necessary pressure through
the double shaft seal.
The prescribed sealing fluid pressure is specified in the "Or-
der-related documents" in the sectional drawing of the shaft
seal. The "Order-related documents" are included in this op-
erating manual.
– Negative pressure in the seal chamber is not allowed.
If no pressure is noted in the "Sectional drawing of the shaft
seal", the following applies:
Return line
Inlet
25
26