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H
7050
7320
7310
d
Du
A.0500.551 – IM-TGMAG/02.00 EN (02/2008)
3.17.5 Safety relief valve – Relative adjustment
Adjustment of the standard setting pressure is performed at the factory.
Note! When testing the safety relief valve mounted on the pump, make sure the pressure never
exceeds the set pressure of the valve + 2 bar.
To adjust the standard opening pressure, proceed as follows:
1. Loosen the tap bolts (7310).
2. Remove cover (7050).
3. Take the measurement of dimensions of H.
4. Read spring ratio in the below table and determine the distance over which the
adjusting bolt (7320) must be loosened or tightened.
Note!
Spring ratio p/f depends upon the dimensions of the spring. It is recommended to check the
dimensions prior to adjusting the pressure.
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 distributor.
Spring ratio – Safety relief valve
TG MAG pump size
Spring dimensions
Pressure
class
Du
mm
d
mm
Lo
mm
p/f
bar/min
15-50
23-65
Horizontal
4 37.0 4.5 93 0.21
6 37.0 4.5 93 0.21
10 36.5 6.0 90 0.81
16 36.5 6.0 90 0.81
58-80
Vertical
4 4.9 7.0 124 0.32
6 49.0 7.0 124 0.66
10 48.6 8.0 124 0.66
16 48.6 8.0 124 0.66
86-100
185-125
4 49.0 7.0 124 0.16
6 48.6 8.0 124 0.33
10 49.0 9.0 120 0.55
16 62 11 109 0.86
Lo
(unloaded)
Vertical safety relief valve Set pressure modification