Grundfos NK Montage- Und Betriebsanleitung Seite 18

5.11 Pump speed relative to material and size
650
Ø [mm]
600
550
500
450
400
350
300
250
200
1200 1600 2000 2400
Maximum permissible speed
Fig. 7
For stainless steel pumps (1.4408/1.4517) and cast iron pumps
with stainless steel impellers there is no limit in the range shown.
5.12 Belt drive
If the unit is belt-driven, the following data must not be exceeded:
Maximum motor power [kW] for shaft end
-1
Speed n min
1000 4
1500 5
2000 6
2500 7
3000 10
For higher power outputs, mount an intermediate shaft with
pedestal bearings.
5.13 Operation with combustion engine
Warning
When operating with petrol or diesel engines, the
manufacturer's installation and operating
instructions should be strictly observed.
Particularly the direction of rotation is very
important. Viewed from the drive shaft end, the
pump rotates to the right (clockwise). Viewed
from the drive shaft end, the motor should
therefore rotate to the left (counter-clockwise)!
The correct direction of rotation is indicated by
the arrow on the pump housing.
If the engines are installed in closed areas, the
combustion air data should particularly be noted
as should the data for exhaust gases.
When draining the tank, make sure to have
containers of adequate size ready for this
purpose.
18
CuSn10
EN-GJL-200
-1
2800 3200 3600 min
7 11 18 22
10 25 32 38
14 25 - -
17.5 - - -
20 - - -
6. Mechanical installation
6.1 Preparations before installation
Warning
It is very important to handle the equipment
correctly before installation.
The contractor must inspect the equipment on delivery and make
sure that it is stored in such a way that corrosion and damage are
avoided.
If more than 6 months will pass before the equipment is put into
operation, it should be considered whether a suitable anti-
corrosive agent should be applied to the internal pump parts.
Ensure
• that the agent used does not affect the rubber parts with which
it comes into contact.
• that the agent can easily be removed.
To prevent water, dust, etc. from entering the pump, all openings
must be kept covered until the pipes are fitted. The cost of
dismantling the pump during start-up to remove a foreign object
can be very high.
Mechanical shaft seals are precision components. If the
mechanical shaft seal of a recently installed pump fails, this will
normally happen within the first few hours of operation. The main
cause of such failures is improper installation of the shaft seals or
the pipe for barrier fluid and/or mishandling of the pump during
installation.
During transport, the pump must be fastened securely to prevent
excessive vibration and/or damage to the shaft and seal caused
by dropping or striking. The pump must not be lifted by means of
the shaft.