This Manual is the exclusive property of the Manufacturer. Reproduction, in any form whatsoever, even partially, is prohibited.
Instruction Manual
High pressure piston pumps – Series NMT-EBCW, NMT-EBCH, XLTI-EBCH, XLTI-ESA
Rev. 0
Page 20 of 25
5.3
Long pump shutdown
The following measures must be implemented in the event of long shutdowns.
•
Let the pump run with clean water for a few minutes.
•
Let the pump run without water for 10 seconds with the delivery pipe (nozzle) open in order to drain the pump and the
delivery circuit, and to prevent the formation of scaling.
•
Wash the pump with water and solvents authorised by the existing legislation.
•
Dry the pump with compressed air.
•
Grease unpainted parts.
•
Prevent the system from coming into contact with corrosive substances.
Mineral oils lose their properties when the pump is shut down or not used for over six months, so they
must be changed.
The checks performed upon first start-up (sect. 5.2) must be repeated whenever the pump is started after
a long shutdown. The oil level too must be checked together with correct tightening of the mounting
screws.
5.4
Putting into service
For correct operation the pumps must preferably be supplied with a max. pressure of 8 bar. If this is not the case, they must be placed
under the head or at the same level as the tank.
The Hawk pumps are supplied complete with first fill oil and a leak-tight plug in order to prevent oil leaks during transport. The leak-
tight plug must be replaced with the plug featuring a rod and vent before the pump is started.
Poor pressure feeding may cause serious damage to the pump, the symptoms of which are difficult
priming, vibration, noise and early seal wear.
The pump must not be operated at pressure values and a rotation speed exceeding the values required
and specified on the ID plate for each model.
