Stübbe SHM 20-15, Original Operating Manual

Page: 33 / 35

Appendix
9.2.6 Sound pressure level
Maximum noise level LpA for 2-pole 50Hz/60Hz motors, in dB
(A)
Size SHM20-15, SHM40-40S und SHM40-40L
Motor power
rating 0.18 kw 0.25 kw 0.37 kw 0.55 kw 0.75 kw 1.10 kw 1.5 kw
Frequency 50
Hz 60
Hz 50
Hz 60
Hz 50
Hz 60
Hz 50
Hz 60
Hz 50
Hz 60
Hz 50
Hz 60
Hz 50
Hz 60
Hz
SHM20-15 50 53 50 53
SHM40-40S 59 62 59 62 61 64
SHM40-40L 61 64 61 64 66 69
Tab. 13 Maximum sound pressure level, sizes SHM20-15, SHM40-40S and SHM40-40L
Sizes SHM50-40S, SHM50-40L and SHM65-50
Motor power
rating 1.5 kw 2.2 kw 3.0 kw 4.0 kw 5.5 kw 7.5 kw
Frequency 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz
SHM50-40S 66 69 66 69 68 71
SHM50-40L 66 69 68 71 70 73
SHM65-50 70 73 70 73 70 73
Tab. 14 Maximum sound pressure level, sizes SHM50-40S, SHM50-40L and SHM65-50
Measuring conditions:
•
Distance to the pump: 1 m
• Operation: free of cavitation
• Motor: IEC standard motor
• Tolerance ±3 dB
• Determination of the sound power by the
sound intensity measurement method (DIN EN ISO 9614-2) and
Determination of the workplace-related emission value
(sound pressure level) LpA to DIN EN ISO 11203
9.2.7 Switching frequency
Motor power rating Switch on / switch off
actions per hour
0.18 kW ≤ motors ≤ 7.5 kW 15
Tab. 15 Switching frequency
9.2.8 Minimum flow rate
A minimum flow rate (Qmin) must be maintained in order to
avoid impermissibly high temperatures and the pump overheat-
ing. The pump must be operated at the following minimum flow
rate:
Construction type Qmin [m
3
/h]
SHM20-15 0.5
SHM40-40S 2.0
SHM40-40L 2.5
SHM50-40S
3.5
SHM50-40L 4.0
SHM65-50 6.0
Tab. 16 Minimum flow rate
300 092 BA-2018.08.21 EN SHM 33