25
Bentone
Function Danfoss BFP41
When the oil pump is started, oil is drawn from the suction connection (S)
through the filter (H) to the suction side of the gear wheel (C).
The gear wheel then pumps oil to the pressure side and the oil is put under
pressure.
The pressure is controlled and kept constant at the set value by the
regulating valve (P1) with the diaphragm (D).
The regulating valve (P1) distributes the oil quantity supplied by the gear set
(C) between the nozzle port (E) and the return side of the pump (R).
The oil quantity utilized is determined by the set pressure on the regulating
valve (P1) and the size of the oil nozzle in the nozzle line.
The valve (P1) functions in the following way:
-
When the opening pressure has been reached, the passage to the
return side opens.
-
The diaphragm and the spring keep the pump pressure constant at
set value.
-
If the pump is overloaded, i.e. if you try to get out more
-
oil than the gear set can supply under existing circum-stances, the
oil pressure falls below the set value and the valve closes against the
return side (R) by means of the diaphragm (D) and goes into starting
position.
This can be remedied by:
-
Reducing the pump pressure.
-
Reducing the oil quantity supplied by using a smaller nozzle.
-
Using a pump with a larger capacity.
Burner with preheating
Consider that the oil quantity is reduced at preheating by 5-20% depending
on.
-
Rise in temperature at the nozzle
-
Nozzle design
-
Capacity (high capacity - small difference)
R
S
E
NC
A
G
H
V
P
1
P
D
C
Summary of Contents for BENTOFLEX ST 146 B30A
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