EOGB X500-2, Инструкция по эксплуатации, Страница: 13 / 20

E90-803-001-005-01 – Rev 4
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Fuel pump type Danfoss BFP….
Function
As the oil pump turns it draws oil from the suction line connection S, through the filter H and into the suction side of
the gear set C . Any suction generated before the gear set can be measured with an appropriate vacuum gauge at
connection V .
The gear set then pumps the oil through and puts it under pressure. The pressure is measured at connection P1 .
No oil will be released to the nozzle port E until the normally closed solenoid valve NC is opened.
The pressure is controlled and kept constant by means of the diaphragm D behind the pressure regulator P
1
. The
pressure regulator P
1
distributes the oil quantity supplied by the gear set between the nozzle port E and the return
side of the pump R .
The oil quantity supplied is determined by the setting of the pressure regulator P
1
and the size of the oil nozzle in the
nozzle line E .
When the opening pressure has been reached, the passage to the return side of
P
1
opens. The diaphragm and the
spring keep the pump pressure constant at the set value.
When used in a one-pipe installation connection
R is closed and A must be removed to allow internal recirculation
of the fuel. If A is not opened then damage to the pump seals will occur.
If a two-pipe system is required then a return line must be fitted into connection R and A must be fitted to divert
the recirculating oil out through the return line.