Publicidad
Idiomas disponibles
Idiomas disponibles
2. INSTALLATION
2.1
Safety precautions
To minimize accident risk during the installation follow the istruction contained in the paragraph 6.1 and in addition:
• don't work alone
• install a magnetic starter with overload protection
• connect motor to grounding
• when working on the pump verify that electric motor or servomotor are not connected to mains.
• using electric tools in hazardous areas, pay attention to special regulations
• keep available a first aid kit
• observe local law safety regulations
Installation
• Foundation height should be so as to facilitate maintenance operation, handling, oil refill and drain, easy disas-
sembling of pumphead
• Install the pump free of strain on its base, pumphead connections and foundation
• Install the pump levelling the piston axis horizontally and the valve axis vertically
Electrical connection
DANGER
Electric motors and electrical components should be connected in accordance with local
regulations and by qualified personnel only.
Install overload protection or temperature sensor.
Check voltage, frequency, motor speed and power.
In hazarduous areas special regulations must be applied.
2.2
General
For a good operation, the correct installation of the pump is fundamental:
• Before carrying out hydraulic connections, make sure that the inside of pipes, tanks, etc. have been thoroughly
cleaned/washed. However we recommend the installation of a temporary filter near to suction nozzle in order to
stop plant residues and slags.
• Connect pipes avoiding nozzles stretching
• Install pipes correctly sized for the maximum flow rate of the pump, avoid necks and tortuosity where air or gas
could be entrapped.
• Check valves and cross fittings should be installed both in the suction and discharge lines, this will permit to
disassemble the pump without draining the plant and/or to install accessories such as pressure gauges, damp-
ners a.s.o.
• Install an expansion joint when pumping liquids having high temperature
• In case of plastic head, install flexible joints both on suction and discharge sides.
• hydraulic diaphragm metering pumps can operate with an NPSH up to 70 Kpa abs. equal to 7 m.w.c. (NPSH =
Net Positive Suction Head ), however, in order to improve dosing accuracy and to accelerate priming, it is ad-
visable to install pump with a slight positive head
WARNING
To prevent serious damages suction and discharge lines must be properly designed,
sized and connected to the pump.
DosingPump.ir
rev. 4.0 EN
5
Publicidad
