SPX TG H15-50, Instruction Manual, Page: 23 / 110

23 A.0500.351 – IM-TGH/07.02 EN (10/2015)
3.13 Extra clearances
To indicate required clearances a code of 4 digits, xxxx, is given on the order.
These digits refer to the following clearance classes:
C0 = Axial clearance between rotor and pump cover set at minimum
C1 = Standard clearance (not indicated because standard)
C2 = ~2 x standard clearance
C3 = 3 x standard clearance
The 4 digits indicate which clearance class is set for which part of the pump, e.g.: code 2 3 3 2
2 3 3 2
Axial clearance between rotor and pump cover
 can be adjusted (see "3.22.6 Clearance adjustment")
Diametral clearance between idler pin and idler bush

in case of an idler bush in a material other than bronze:
special idler pin (2 or 6 material) with adapted diameter (for code 2 or 3)

in case of an idler bush in bronze:
special bronze idler bush with adapted inside diameter (for code Y or Z)
Radial clearance between idler and crescent of pump cover

by extra machining of the outside diameter of the idler (for code 2 or 3)
Radial clearance between rotor and pump casing

by extra machining of the outside diameter of the rotor (for code 2 or 3)
The code ‘‘1’’ always stands for ‘‘normal’’ and no special action is considered.
The indicated numbers in the tables below are average values in microns (µm).
Radial clearance on rotor, idler outside diameter – Axial clearance on pump cover
Pump size
C0 (µm)
axial clearance
pumpcover set minimum
C1 (µm)
normal
C2 (µm)
= 2.2 x C1
C3 (µm)
= 3 x C1
Code rotor 1xxx 1xxx 2xxx 3xxx
Code idler x1xx x1xx x2xx x3xx
Code pump cover assembly xxx0 xxx1 xxx2 xxx3
TG H2-25 35 107 235 320
TG H3-32 35 107 235 320
TG H6-40 40 125 275 375
TG H15-50 52 160 350 480
TG H23-65 56 170 375 510
TG H58-80 66 200 440 600
TG H86-100 72 220 480 660
TG H185-125 85 255 560 765
TG H360-150 100 300 660 900
Diametral clearance on pin / idler bearing
Pump size
C1 (µm)
normal
C2 (µm)
= 2 x C1
C3 (µm)
= 3 x C1
Code for adapted 2 or 6 material pin (2 or 3) xx1x xx2x xx3x
Code for adapted bronze idler bush (Y or Z) xx1x xxYx xxZx
TG H2-25 90 180 270
TG H3-32 90 180 270
TG H6-40 110 220 330
TG H15-50 150 300 450
TG H23-65 160 320 480
TG H58-80 240 480 720
TG H86-100 275 550 825
TG H185-125 325 650 975
TG H360-150 400 800 1200
Note! the clearance between the idler pin and idler bush (3
rd
digit) should always be less or equal
to the clearance on the idler (2 nd digit). Otherwise there is a risk of contact between the idler
and the crescent of the pump cover.