SPX Cooling Technologies TG MAG58-80 Safety relief valve - Relative adjustment, d Lo Du, unloaded

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.

7050	H
7320
7310
Vertical safety relief valve	Set pressure modification

Spring ratio – Safety relief valve

		Spring dimensions
	Pressure	Du	d	Lo	p/f
TG MAG pump size	class	mm	mm	mm	bar/min

	Horizontal	4	37.0	4.5	93	0.21
15-50		6	37.0	4.5	93	0.21
23-65		10	36.5	6.0	90	0.81
		16	36.5	6.0	90	0.81
		4	4.9	7.0	124	0.32
58-80		6	49.0	7.0	124	0.66
		10	48.6	8.0	124	0.66
	Vertical
		16	48.6	8.0	124	0.66
		4	49.0	7.0	124	0.16
86-100		6	48.6	8.0	124	0.33
185-125		10	49.0	9.0	120	0.55
		16	62	11	109	0.86

d

Lo

Du

(unloaded)

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.

A.0500.551 – IM-TGMAG/02.00 EN (02/2008) 27