Radial Load On Shaft End; Shaft Rotation - Johnson Pump TG GS2-25 Instruction Manual

3.18.3.2 Radial load on shaft end

The shaft end of the pump shaft may be loaded in radial sense with the maximum radial force (Fr).
See table.
• This force is calculated on the maximum allowable torque and the maximum allowable working
pressure of the pump.
• In case a direct drive with a flexible coupling is used, the indicated force will not be exceeded
when pump and drive are well aligned.
• Starting with the TG GS15-50, V-belt drive can be used.
In case of V-belt drive
The maximum allowable radial force Fr as indicated in the table may be chosen higher but must
be calculated case by case in function of pressure, torque and size of the pulley.
Consult your local supplier for advice.

3.18.4 Shaft rotation

Shaft rotation determines which port
of the pump is suction and which is
discharge.
Relation between shaft rotation and
suction/discharge side is indicated by
the rotation arrow plate attached at
the relief valve or the top cover.
The small arrows 2 and 3 indicate the
flow direction of the pumped liquid.
Always make sure that the pump
rotates in the direction indicated
by the rotation arrow plate.
If the pump rotates in the opposite direction, the safety relief valve or top cover must be
disassembled and turned around by 180°. If the pump rotates in both directions, a double safety
relief valve is required.
Suction
Suction
30
Installation of safety relief valve
Fr
TG GS pump size
2-25/3-32
6-40
15-50/23-65
58-80/86-100
185-125
Discharge
Discharge
A.0500.501 – IM-TGGS/05.01 EN (03/2013)
Fr (N) - max
400
700
1000
2000
3000
1 Direction
1
3 2
of rotation
of pump shaft
2 Suction side
3 Discharge side
Suction
Suction