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Spring ratio – Safety relief valve
TG BLOC Pump size
15-50
23-65
58-80
86-100
Example:
Note!
The spring ratio p/f depends upon the dimensions of the spring. Check these dimensions if
necessary (see table above).
When the safety relief valve is not functioning properly, the pump must immediately be taken out of
service. The safety relief valve must be checked by your local distributor.
A.0500.751 – IM-TGBLOC/01.00 EN (10/2020)
Pressure
class
mm
4
37.0
V27
6
37.0
10
36.5
4
49.0
V35
6
49.0
10
48.6
4
49.0
V50
6
48.6
10
49.0
adjust the standard set pressure of a V35-G10 valve (for pump size 58-80) to 8 bar.
F Standard set pressure of V35-G10 = 11 bar (see table under 3.17.1)
F Difference between actual set pressure and desired set pressure = 11 - 8 = 3 bar
F ∆H to loosen the adjusting bolt = 3 x 1.52 mm (see table above) = 4.56 mm
Spring dimensions
∆H [mm] in order
Du
d
Lo
p/f
to adjust by
mm
mm
bar/mm
4.5
93
0.21
4.5
93
0.21
6.0
90
0.81
7.0
124
0.32
7.0
124
0.32
8.0
124
0.66
7.0
124
0.16
8.0
124
0.33
9.0
120
0.55
1 bar
d
4,76
4,76
1,23
3,13
3,13
1,52
6,25
Du
3,03
1,82
23
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