Goulds Pumps ICP - IOM - Manual (Page 15)

Installation, Operating and Maintenance Instruction Model ICP
ICP 100-English page 6 Revision 00
Article No 24264412 Issue 05/2006
Example: Function of bearings. Operation and appli-
cation conditions are essentially responsible for their
achievable life cycle.
By regular control of the lubricant and the running
sound the danger of occurring over temperatures by
bearings running hot or defect bearing seals is
avoided. Refer to chapter 6.6 and 7.4.
The function of the shaft sealing must be secured by
regular control.
If auxiliary systems (e.g. external flushing, cooling,
heating) are installiert, it must be checked, if monitor-
ing devices are necessary to secure the function.
2.7.7 Electric switches and control device, Instru-
mentation and accessories
Electric switches and control devices, instru-
mentation and accessories like e.g. flush tanks,
a.s.o., must correspond with the valid safety
requirements and regulations for explosion
protection.
2.8 Use acc. to Regulations
2.8.1 Speed, Pressure, Temperature
Suitable safety measures must be taken at the
plant to ensure that the speed, pressure and
temperature of the pump and the shaft sealing
do not exceed the limit values given in the data
sheet and / or order confirmation. The given
admission pressures (system pressures) must
also be sufficiently high.
Further, pressure shocks, as can occur on too fast
shut down of the facility, must be kept away from the
pump (e.g. by non-return valve at pressure side, fly
wheel, airtanks). Quick temperature changes must be
avoided. They could cause a temperature shock and
lead to damage or impair the function of single com-
ponents.
2.8.2 Permitted Nozzle Loads and Torques
Basically the suction and discharge piping must
be designed in such way, that as little forces as
possible are effective to the pump. If that is not
possible, the values shown in chapter 3.5 must
not be exceeded under any circumstances.
This is valid for the operation as well as for the
standstill of the pump and therefore for all pos-
sible pressures and temperatures of the unit.
2.8.3 NPSH
The pumped liquid must have a min. pressure
NPSH at the impeller inlet, so that cavitation
free work is secured resp. a "break off" of the
pump flow is prevented. This condition is ful-
filled, when NPSH-value of the system
(NPSHA) lies above NPSH-value of the pump
(NPSHR) under all operating conditions.
Attentention must especially be piad to the NPSH-
value on pumping liquids near the vapour pressure. If
the NPSH-value of the pump remains under, this can
lead from damage of the material due to cavitation to
destruction by overheating.
The NPSH-value of the pump (NPSHR) is shown in
the curves of every pump type.
2.8.4 Sealing, Flushing, Cooling
Suitable provisions for the regulation and monitoring
of sealing, flushing or cooling are to be provided.
When handling dangerous liquids or if temperatures
are high, care should be taken to ensure that the
pump ceases operating if the sealing, flushing or cool-
ing system fails.
Sealing, flushing and cooling systems must always be
operational before the pump is started up. They
should not be taken out of operation until the pump
has stopped, provided that the nature of the operation
allows this at all.
2.8.5 Back Flow
In systems where pumps are operating in closed cir-
cuits under pressure (gas cushions, steam pressure),
the pressure of the gas cushion must not be reduced
via the pump, since the back flow speed may be much
higher than the operating speed, which would destroy
the unit.
3. Description
3.1 Design
ICP-pumps are single-stage volute casing pumps in
process design. Hydraulic design and dimensions
comply with ISO 2858/ EN 22858, the technical de-
sign complies with ISO 5199/EN 25199. For pump
pressure up to 25 bar and volute casing with center-
line feet.
ICPI-pumps as design ICP, except that they have an
inducer.
ICPH- and ICPIH-pumps pumps additionally possess
a cooling or heating of the casing cover and/or the
volute casing.
The pumps are designed as modular systems and
can, therefore, be delivered in many variants (e.g.
different materials, shaft sealings, different kinds of
lubrication, cooling / heating, a.s.o.).
The permitted application conditions and design de-
tails of the delivered pump are shown in the attached
data sheet and / or order confirmation.
3.2 Shaft Sealing
Basically there are two kinds of shaft sealing: the
paccking and the mechanical seal, whereas, there
again are many variants of both kinds. At the data