Bentone BF1 Series - Suntec AT2 45 C Functionality

27 Bentone BF1
General
By-pass
solenoid
valve closed
Vacuum
gauge port
Gear set
Pressure
gauge port
To nozzle
By-pass
solenoid
valve open
Blocking
solenoid
valve open
Blocking
solenoid
valve closed
Suction
Return
One pipe installation
Oil under suction
Oil under pressure
By-passed oil
returned to tank,
or to suction
Back to suction
By-pass
plug
Shaft seal
Pressure
outlet
or pressure
gauge port
Low pressure
adjustment
High pressure
adjustment
Two pipe installation
5.1.3 Function AT2 45C
• Light oil
• Nozzle flow up to 45 l/h (approx. 460 000 kcal/h - 534 kW)
• One or two-pipe system
Pump operating principle
The oil pump has a built in solenoid valve which controls the regulator cut-off
valve giving fast cut-off and cut-on function independent of the rotational
speed.
The gear-set draws oil from the tank through the built-in filter and transfers it
to the valve that regulates the oil pressure to the nozzle line.
All oil which does not go through the nozzle line will be dumped through
the valve back to the return line or, if it is a one-pipe installation, back to the
suction port in the gear-set.
- Two-pipe operation
When the solenoid valve is non-activated, the by-pass channel between the
pressure and return sides of the valve is open.
No pressure will then be built up to open the valve. It does not matter which
speed the gear set has.
When the solenoid is activated, this by-pass channel will be closed and
because of the full speed of the gear-set, the pressure necessary to open the
valve will be built up very rapidly which gives a very sharp cut-on function.
- One-pipe operation
Bleeding on one-pipe is not automatic, and a pressure port must be opened
to bleed the system.
Cut-off
When the burner stops, the solenoid opens the by-pass at the same moment
which drains all the oil down to the return and the nozzle valve closes immediately.
This gives a very sharp cut-off function
The cut-on and off can be regulated regardless of motor speed and has an
extremely fast response.
When the solenoid is non activated, the torque requirement is low up to full
motor speed.