TECHNICAL MANUAL MT103
12
The REFLUX 819/FO regulator uses the 204/A/FO and 205/A/FO and 207/A/FO pilots. The regulation range of the
different pilots is given in the tables below.
205/A/FO Pilot setting springs
Code
Colour
De
Lo
d
i
it
Setting range in bar
2703045
BROWN
7.5
7.5
9.5
30
÷
44
2703224
GREY
35
100
8
7.5
9.5
44
÷
60
207/A/FO Pilot setting springs
Code
Colour
De
Lo
d
i
it
Setting range in bar
2703224
GREY
35
100
8
7.5
9.5
41
÷
74
The operating principle of the pilot has already been briefly illustrated in par. 1.2. Variation of the setting is obtained
by turning the adjustment screw 10 (fig. 2). Clockwise rotation leads to an increase in the regulated pressure while
anticlockwise rotation leads to a decrease. When the desired setting has been reached, the adjustment screw can
be blocked by means of the provided nut 9.
De =
Ø external diameter
d =
Ø wire diameter
i =
active coils
Lo =
Lenght
it =
total coils
204/A/FO Pilot setting springs
Code
Colour
De
Lo
d
i
it
Setting range in bar
2701541
WHITE
4
7.75
9.75
1
÷
3.2
2701800
YELLOW
4.5
8.25
10.25
3.2
÷
5.2
2702080
ORANGE
35
100
5
8.75
10.75
5.2
÷
8.2
2702290
RED
5.5
8.5
10.5
8.5
÷
17
2702460
GREEN
6
8.25
10.25
12
÷
25
2702660
BLACK
6.5
8.25
10.25
17
÷
26
2702820
BLUE
7
7
9
25
÷
33
1.3
Tab. 1 SETTING SPRINGS
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