Mass Moment Of Inertia; Radial Clearances; Play Between Gear Teeth; Maximum Size Of Solid Particles - Johnson Pump SPXFLOW TopGear BLOC Series Instruction Manual

3.11 Mass moment of inertia

TG BLOC
J (10 x kg·m
-3

3.12 Radial clearances

TG BLOC
Minimum (µm)
Maximum (µm)

3.13 Play between gear teeth

TG BLOC
Minimum (µm)
Maximum (µm)
Play between gear teeth

3.14 Maximum size of solid particles

TG BLOC
Size (µm)

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
Shaft diameter
Short EN12756 (DIN 24960)
L1K (short KU)
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):
FPM (Fluorocarbon):
PTFE (solid or PTFE wrapped):
Chemraz:
Kalrez *:
®
* Kalrez ® is a registered trademark of DuPont Performance Elastomers
Maximum viscosity
3000 mPas:
5000 mPas:
7500 mPas:
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.
20
15-50 23-65 58-80
) 3.5 6.8 32
2
15-50 23-65 58-80
70 75 100
150 165 200
15-50 23-65 58-80 86-100
360 400 400 400
720 800 800 800
15-50 23-65 58-80 86-100
120 125 150 165
15-50
23-65
40
KU040
45
110°C
180°C
220°C
230°C
250°C
For single mechanical seals of light construction
For single mechanical seals of medium torque construction
(consult manufacturer).
For single mechanical seals of high torque construction
(consult manufacturer).
86-100
54
86-100
115
225
58-80
86-100
45
KU045
45
A.0500.751 – IM-TGBLOC/01.00 EN (10/2020)