11
The capacity and the head of the pump refer to water pumping at room temperature. If it
pumps high temperature liquids or other viscosities and densities, the performances
have to be proportionately decreased. Pumps of series HTM work well with liquids
having a viscosity up to 100 CPS3 and specific gravity up to 1.9
3
. However both the
viscosity and the specific gravity have to be communicated at the moment of quotation.
The electric motor is selected for the viscosity and the specific gravity communicated.
In the case of higher values, the power of the motor could be insufficient.
In some cases the pump can be used to empty tanks, in these situations the liquid can
stop flowing in the pump while this is still working. In these cases a pump operating
without liquids (that means dry-running) can be dangerously damaged if it’s not stopped
immediately. For such applications the use of automatic equipment or the constant
presence of a person who can shut down the pump is recommended.
• Earplugs.
• Protective homologated caps against noises for the personnel in the proximity.
• Soundproofing canopy for the pump. In these cases make sure that the motor ventilation is
guaranteed.
3.7 Shut Down
Normally the pump should be shut down only after closing the discharge valve. If the suction
valve is closed before the other, cavitation of the pump can occur.
If the suction is flooded, close the valve after shutting down the pump.
3.9 Noise Level
If the pump is temporary removed from the system and kept in stock, it’s necessary to follow the
instructions of paragraph 2.3 “Storage”.
In some circumstances, for example when the pump works with high pressure and low capacity
the noise increases and can be disturbing for the personnel working in the proximity. In this case
it’s possible to intervene with:
3.8 Long Pump Inactivity
If the pump has to remain inactive for a long period, before stopping it, it’s recommended
to let water flow in the system for several minutes so that you avoid any risk of internal
deposits or sediments or precipitations of solid parts. Drain the liquid in the pump. An
eventual freezing of the liquid inside the pump can cause damage. Always verify if
the pumped liquid reacts with water. In this case contact Ekin Endüstriyel to find an
alternative solution.
The values indicated are merely indicative and can vary in the series of pumps mod. HTM.