20
A.0500.751 – IM-TGBLOC/01.00 EN (10/2020)
3.11 Mass moment of inertia
TG BLOC
15-50
23-65
58-80
86-100
J (10
-3
x kg·m
2
)
3.5
6.8
32
54
3.12 Radial clearances
3.13 Play between gear teeth
3.14 Maximum size of solid particles
3.15 Shaft sealing
Mechanical seal according to EN12756 (DIN24960) – General information
In TopGear TG BLOC the short EN12756 (DIN24960) single mechanical seal can be built in.
The mechanical seal is set against the rotor shoulder.
TG BLOC pump size
15-50
23-65
58-80
86-100
Shaft diameter
40
45
Short EN12756 (DIN 24960)
KU040
KU045
L1K (short KU)
45
45
Dimensions in mm
Performance
Maximum performance such as viscosity, temperature and working pressure depends on the make of
the mechanical seal and the used materials.
The following basic values can be taken into consideration:
Maximum temperatures of elastomers
Nitrile (P):
110°C
FPM (Fluorocarbon):
180°C
PTFE (solid or PTFE wrapped):
220°C
Chemraz:
230°C
Kalrez
®
*:
250°C
* Kalrez
®
is a registered trademark of DuPont Performance Elastomers
Maximum viscosity
3000 mPas:
For single mechanical seals of light construction
5000 mPas:
For single mechanical seals of medium torque construction
(consult manufacturer).
7500 mPas:
For single mechanical seals of high torque construction
(consult manufacturer).
The maximum allowed viscosity between the sliding faces of the mechanical seal depends on the
nature of the liquid (Newtonian, plastic etc.), the sliding speed of the seal faces and the mechanical
construction.
Play between gear teeth
TG BLOC
15-50
23-65
58-80
86-100
Minimum (µm)
360
400
400
400
Maximum (µm)
720
800
800
800
TG BLOC
15-50
23-65
58-80
86-100
Minimum (µm)
70
75
100
115
Maximum (µm)
150
165
200
225
TG BLOC
15-50
23-65
58-80
86-100
Size (µm)
120
125
150
165
