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en
7.4
Permissible forces and torques on
the pump flanges
Fig. 6: Load case 16A, EN ISO 5199, Ap-
pendix B
50
WARNING
Hot surface!
The entire pump can become very hot. There is a risk of burns!
• Allow the pump to cool down before commencing any work!
WARNING
Risk of scalding!
At high fluid temperatures and system pressures, allow the pump to cool
down first and then depressurise the system.
CAUTION
Damage to the pump due to overheating!
The pump must not be allowed to run dry for more than 1 minute. Dry
running causes a build-up of energy in the pump, which can damage the
shaft, impeller, and mechanical seal.
• Make sure that the volume flow does not fall below the minimum
value Q
min
Calculation of Q
:
min
Q
= 10 % x Q
min
max pump
Pump suspended in pipe, case 16A
DN
Forces F [N]
F
F
F
X
Y
Z
Discharge and suction flange
32
392
457
370
40
479
544
435
Values in acc. with ISO/DIN 5199 – class II (2002) – Appendix B
Table 4: Permissible forces and torques on pump flanges in vertical pipe
Installation and operating instructions • Wilo-VeroLine-IPL-Z, Wilo-VeroTwin-DPL-Z • Ed.01/2024-07
.
Torques M [Nm]
Σ Forces F
M
M
X
718
479
326
848
566
392
M
Σ Torques M
Y
Z
370
696
457
827
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