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Screw Pump Performance Data

This document contains characteristic curves and pump data for a screw pump. It includes details on the pump type, size, liquid being pumped, operating conditions at different speeds and viscosities, and calculated performance values like flow rate, power requirement, efficiency and pressure. Performance is shown to vary slightly with changes in operating speed, temperature and viscosity. The document also lists technical specifications like moments of inertia and standards used for calculations.

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kumar
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441 views2 pages

Screw Pump Performance Data

This document contains characteristic curves and pump data for a screw pump. It includes details on the pump type, size, liquid being pumped, operating conditions at different speeds and viscosities, and calculated performance values like flow rate, power requirement, efficiency and pressure. Performance is shown to vary slightly with changes in operating speed, temperature and viscosity. The document also lists technical specifications like moments of inertia and standards used for calculations.

Uploaded by

kumar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Quotation no.

Characteristic curves for 12


screw pumps
Date Name
07.11.2019

Pump type SN Size of pump 120 Pitch angle 46 Project no.


Item
1 Liquid pumped ISO VG 32 1# 2# 3# 4#
2 Density 0.864 kg/dm³ Pump capacity 115 l/min 112 l/min 114 l/min 111 l/min 2
3 Rotor housing GG25 Power req. 1.48 kW 1.45 kW 1.68 kW 1.64 kW 3
4 I(rotor) 0.00042 kgm² Starting torque 9.8 Nm 9.5 Nm 11.1 Nm 10.8 Nm 4
5 I(coupl) kgm² Total efficiency 71.0 % 71.3 % 73.7 % 73.5 % 5
6 I(mag.coupl) kgm² Differential pressure 5.5 bar 5.5 bar 6.5 bar 6.5 bar 6
7 I(total) 0.00042 kgm² Speed 1450 1/min 1450 1/min 1450 1/min 1450 1/min 7
8 Calculation reference acc. to Temperature 30.0 °C 60 °C 30.0 °C 60 °C 8
9 VDMA 24 284 class II groupe II Viscosity 49.3 mm²/s 15.7 mm²/s 49.3 mm²/s 15.7 mm²/s 9
10 NPSH(pump) 2.0 mWs 2.0 mWs 2.0 mWs 2.0 mWs 10
11 Remarks 11

NPSH-value without safety margins

122
Flow rate Q [l/min]

120

118

116

114

49.3 mm²/s
112
49.3 mm²/s

110

108 15.7 mm²/s


15.7 mm²/s
106

104
3
Power absorbed P [kW]

49.3 mm²/s
2.5
49.3 mm²/s
15.7 mm²/s
2 15.7 mm²/s

1.5

0.5

0
0 2 4 6 8 10 12

Differential pressure p [bar]

CAP-3Screw/ # Version: 4.1.14 Item


Item Page

ALLWEILER GmbH / 78315 Radolfzell


Quotation no.

12
Pump data sheet Date Name
07.11.2019

Quotation for company


Order no
Project no.
Prepared by
Pump type SN 120 46
Rotor housing cast iron / (EN-GJL-250)

Liquid pumped ISO Lube / ISO VG 32

Operating conditions 1# 2# 3# 4#
Q(req) l/min 100
p(inlet) bar 0.50 0.50 0.50 0.50
p(outlet) bar 6.0 6.0 7.0 7.0
p(diff) bar 5.5 5.5 6.5 6.5
Speed 1/min 1450 1450 1450 1450
Temperature °C 30.0 60 30.0 60
Viscosity mm²/s 49.3 15.7 49.3 15.7
Density kg/dm³ 0.864

Calculated pump data


Q(calc) l/min 115 112 114 111
P(req) kW 1.48 1.45 1.68 1.64
Eta(vol) % 97.1 94.9 96.7 94.1
Eta(tot) % 71.0 71.3 73.7 73.5
pg(dyn) bar 25.8 14.6 dyn*) 25.8 14.6 dyn*)
pg(stat) bar 22.0 stat*) 22.0 22.0 stat*) 22.0
NPSH(pump) mWs 2.0 2.0 2.0 2.0
Remarks: NPSH-value without safety margins

I(rotor) kgm² 0.00042


I(coupl) kgm²
I(mag.coupl) kgm²
I(total) kgm² 0.00042

Referring documents
Calculation reference acc. to VDMA 24 284 class II groupe II
Admissible tolerances of capacity dQ = Q * (-5..+10% )

Max. pressure limitation acc.: (SN/SM only)dyn*) : Hydrodynamic pressure limit


stat*): Stress calculation of the liner

CAP-3Screw/ # Version: 4.1.14 Item Page

ALLWEILER GmbH / 78315 Radolfzell

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