SPX TG H15-50, Instruction Manual, Page: 28 / 110

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1230 1240
2000 2010
2020
2030
2060
2070
2080
2100
2110
2120
2130
2140
3000
1210 1220
0710
2170
2160
2050
TG GM 6-40 to TG GM 23-65
2140
2130
2120
2050
2030
2000
2080
2010
2100
2070
2060
2020
2110
2160
2150
TG GM 58-80 to TG GM 360-150
3000
A.0500.351 – IM-TGH/07.02 EN (10/2015)
3.16.4 Reverted packing execution for e.g. chocolate application
For chocolate pumping applications the PR version is designed.
The pump shaft is sealed by means of packing rings and the bronze shaft bearing is placed outside
the pumped medium and is designed to work as a packing gland. Because of the fact that, under
normal conditions, the shaft bearing does not come into contact with the pumped medium, bronze
can be used as material.
The bush bearing is greased by an external grease supply. The grease has to be provided by the end
user because of compatibility with the pumped liquid.
Depending of the type of chocolate extra clearances are given on Rotor, Idler, Pump cover and Idler
bush bearing.
For extra clearances see 3.13 .
On this improved execution, the gland packing area can be filled with grease from the outside before
the pump is actually started. This prevents the chocolate from entering this area until the packing is
properly adjusted. Otherwise, in case chocolate with sugar content is entering the gland packing
area, it would caramelize/burn at the inside and the shaft sealing would become immediately un-
effective even if the gland is tightened harder afterwards. To allow this pre-lubrication of the gland
packing area, we have added a lantern ring with external grease nipple behind the first packing ring.
Please note that the lubricant must be food-approved and compatible with the product pumped.
Note! The packing is lightly tightened by hand at the factory. When pumping chocolate, the packing
needs to be tightened bit by bit at the initial start-up in order to achieve the utmost minimum
of leakage, just enough to lubricate the packing rings. Excessively leaking chocolate can
overheat in the packing, causing caramelisation, resulting in extra wear of the packing.
TG H pump size 6-40
15-30
23-65
58-80 86-100 185-125
Shaft diameter (mm) 22 32 40 45 55
Section width (mm) 8 8 10 10 10
Number of rings see 5.2.5.7
Dimensions in mm
Reverted packing (improved execution)