Pompa solar / oil pump SUNTEC ALEV35C 9317

The SUNTEC ALE oil pump incorporates a blocking solenoid valve fitted with a built-in return
valve ensuring an in-line cut-off function and a nozzle line pressure relief.
The integration of the return valve into the solenoid valve means that the ALE pump
performance and dimensions are identical to the AL pump.
APPLICATIONS
– Light oil
– One or two-pipe system
PUMP OPERATING PRINCIPLE
The gear set draws oil from the tank through the built-in filter and transfers it to the nozzle
line via the cut-off solenoid valve. A pressure regulating valve is used to dump all oil which
is not required at the nozzle.
In two-pipe operation, the by-pass plug must be fitted in the return port, which ensures that
the oil dumped by the regulating valve is returned to the tank and the suction line flow is equal
to the gear set capacity.
In one-pipe operation, the oil which does not go through the nozzle line is returned directly
to the gear inlet and the suction line flow is equal to the nozzle flow. In that case, the by-pass
plug must be removed from the return port, and the return port sealed by steel plug and
washer.
Bleed
Bleeding in two-pipe operation is automatic : it is assured by a bleed flat on the piston.
In one-pipe operation, the plug of a pressure gauge port must be loosened until the air is
evacuated from the system.
Cut-off
The solenoid valve of the ALE pump is of the “normally closed” type and is situated in the
nozzle line. This design ensures extremely fast response and the switching can be selected
according to the burner operating sequence and is independant of motor speed.
When the solenoid is non-activated, the valve is closed and all oil pressurised by the gear
set passes through the regulator to the suction or return line, depending upon pipe
arrangement.
As soon as the solenoid is activated, oil passes to the nozzle line at the pressure set by the
pressure regulating valve.

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