100
A.0500.251 – IM-TL/13.00 EN (08/2009)
Plastic plug
Retainer tool
The values in the table are
based on the assumption
that the suction pressure is
between 0.5 and 1 bar absolute.
Please note that the values are a
rough adjustment.
TL1
TL2
TL3
Opening
Rotate
Rotate
Rotate
pressure
adjusting screw
adjusting screw
adjusting screw
pd (bar)
X turns
X turns
X turns
0
0.0
0.0
0.0
1
0.6
1.4
2.7
2
1.3
2.8
5.3
3
1.9
4.2
8.0
4
2.6
5.6
10.6
5
3.2
6.9
13.3
6
3.9
8.3
16.0
7
4.5
9.7
18.6
8
5.2
11.1
21.3
9
5.8
12.5
23.9
10
6.5
13.9
26.6
11
7.1
15.3
29.3
12
7.8
16.7
31.9
13
8.4
18.0
34.6
14
9.0
19.4
37.2
15
9.7
20.8
39.9
16
10.3
22.2
42.5
17
11.0
23.6
45.2
18
11.6
25.0
47.9
19
12.3
26.4
50.5
20
12.9
27.8
53.2
21
13.6
29.1
55.8
22
14.2
30.5
58.5
• Close the discharge valve slowly until the desired set-pressure is reached
• Use the retainer tool to turn the adjusting screw of the valve slowly
counter clockwise until the discharge pressure is starting to drop away
• Check the proper setting of the valve by slowly opening and closing the discharge
valve. The set-pressure of the relief valve can be increased by turning the adjusting
screw clockwise and decreased by turning the adjusting screw counter-clockwise
• After setting the relief valve, open the discharge valve completely
Note:
If the valve is not adjusted according to the method described above the correct
valve setting cannot be guaranteed and the pump might be damaged because of too high
discharge pressure.
If there is no possibility to connect a pressure gauge or there is no discharge valve fore
-
seen in the installation, the valve can be pre-adjusted according to the procedure
described below.
• Remove the plastic plug at the front of the valve
• Use the retainer tool to turn the adjusting screw counter-clockwise until the spring is
completely relieved
• Turn the spring adjusting screw X number of turns clockwise in function of the
desired opening pressure (see table below)