Pump Calculation
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SIZING CALCULATIONS FOR SUMP PUMP AT SUMP PIT FOR PROPOSED ERECTION OF A 2 STOREY DETACHED DWELLING HOUSE WITH BASEMENT AND SWIMMING POOL ON LOT 1663T PARCEL B6A-5 MK 34 AT OCEAN DRIVE, SENTOSA COVE CALCULATION OF DESIGN FLOW Discharge Unit Flow from reflective pool & rain water in basement
= 2.0 lit/sec(estimated)
Design flow rate
= 2.0 lit/sec
CALCULATION OF STATIC HEAD Discharge level at open drain Sump pit level
= =
103.35 99.97
Static Head
=
3.38
CALCULATION OF TOTAL HEAD No. of dia. 50mm fittings
Equivalent length (m)
Length of dia. 50mm pipe (approx) 90 deg. Elbow 6 nos. (6 x 2.3) Gate valve 2 nos. (2 x 22) Check valve 2 nos. (2 x 11.5) Tee piece 1 no
= = = = =
Total equivalent length of 50 dia. mm pipe
Flow Rate (lit/min)
5.56 13.80 44.00 23.00 3.50 89.86
50
100
150
200
Static Head (m) Friction Head 50mm dia.
3.38 0.49
3.38 1.62
3.38 2.70
3.38 5.39
Total Head (m)
3.87
5.00
6.08
8.77
Pump selection From the plot of system curve against pump performance curve:Pump selected : Nocchi submersible pump model Priox 300/9 M Aut Capacity Operating Head
: :
2.0 lit/sec 6m
= 2.0 lit/sec(estimated)
Design flow rate
= 2.0 lit/sec
CALCULATION OF STATIC HEAD Discharge level at open drain Sump pit level
= =
103.35 99.97
Static Head
=
3.38
CALCULATION OF TOTAL HEAD No. of dia. 50mm fittings
Equivalent length (m)
Length of dia. 50mm pipe (approx) 90 deg. Elbow 6 nos. (6 x 2.3) Gate valve 2 nos. (2 x 22) Check valve 2 nos. (2 x 11.5) Tee piece 1 no
= = = = =
Total equivalent length of 50 dia. mm pipe
Flow Rate (lit/min)
5.56 13.80 44.00 23.00 3.50 89.86
50
100
150
200
Static Head (m) Friction Head 50mm dia.
3.38 0.49
3.38 1.62
3.38 2.70
3.38 5.39
Total Head (m)
3.87
5.00
6.08
8.77
Pump selection From the plot of system curve against pump performance curve:Pump selected : Nocchi submersible pump model Priox 300/9 M Aut Capacity Operating Head
: :
2.0 lit/sec 6m
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