What SHERVEY™ Solar Pump Best Suits Your Needs?

What SHERVEY™ Solar Pump Best Suits Your Needs?

Purchasing your first Solar Water Pump?  Selecting the right model is as simple as 4 steps.

Follow these steps to work out which Shervey Solar Water Pump is best suited to your water pumping needs.

Step 1 - Collect the following information about your Bore/Dam/Creek/River

Bore/Dam Specifications

  1. Supply Purpose:  ie. Stock/Domestic/Header Tank          
  2. Bore Casing Diameter:  5 inches
  3. Bore Depth:  36.5m
  4. Standing Water Level (Dynamic Lift):  12.6m
  5. Lift from source to delivery point (Static Lift):  15m
  6. Distance from source to delivery Point:  200m
  7. Type of Poly Pipe:  Greenline (LDPE)
  8. Size of Poly Pipe:  1.5 inches
  9. Flow Required:  4000 gallons/day or 18,000L/day

                         

Bore casing, bore depth are not required when pumping from a dam/river/creek.  Standing water level (dynamic lift) will use zero as a default figure when working out TDH.

Step 2 – Work out your Friction Loss and Total Dynamic Head (TDH)

In solar water pumping terms, Total Dynamic Head (TDH) is the total equivalent height that water is to be pumped, taking into account friction losses in the pipe.

TDH = Dynamic Lift + Static Lift + Friction Loss

  • Dynamic Lift is the total height from standing water level to the top of the bore casing/cap.
  • Static Lift is the total height from the bore cap/top of casing to the delivery point.
  • Distance is the total distance from bore casing/dam float to the delivery point (usually the length of the poly that is to be used).
  • Friction Loss is calculated using the total distance from the top of the bore casing/cap to the delivery point along with pipe material, pipe diameter and flow rate.

A handy calculator which can be used to calculate friction loss can be found at this link: http://www.calculatoredge.com/mech/pipe%20friction.htm

In this scenario:

TDH = 12.6m (Dynamic Lift) + 15m (Static Lift) + 5m (Friction Loss – calculated using link)

TDH = 12.6m + 15m + 5m

TDH = 32.6m

Step 3 – Match your TDH to a Shervey Pump

Refer to the Maximum Flow Rate Chart for each pump, these figures are per hour and are based on an 8-hour day so if you want 18,000L/day than divide by 8 to reach 2,250L/hr.

Once you have calculated the L/hr or g/hr you will need to match the TDH in the chart and then run across the chart to see which pump matches your desired flow.

Bold red text in table below matches the scenario figures. With the desired flow of 2,250L/hr the PMP5100 and the PMP6070 will be best suited to your needs.

 

TDH

5020
Helical
5040
Helical
5080
Helical
5100
Helical
6050 Centrifugal 6070 Centrifugal 6090 Centrifugal

0m

1800L
(400gal)
2100L
(465gal)
2500L
(555gal)
4000L
(890gal)
4900L
(1090gal)
6500L
(1445gal)
7500L
(1600gal)
10m
(30ft)
1700L
(375gal)
2000L
(440gal)
2350L
(520gal)
3800L
(845gal)
4600L
(1020gal)
6200L
(1375gal)
7200L
(1600gal)
20m
(65ft)
1600L
(355gal)
1900L
(420gal)
2200L
(490gal
3600L
(800gal)
3800L
(845gal)
5900L
(1310gal)
6700L
(1490gal)
30m
(100ft)
1400L
(310gal)
1750L
390gal)
2100L
(465gal)
3400L
(755gal)
2800L
(620gal)
5650L
(1255gal)
6000L
(1335gal)
40m
(130ft)
1250L
(275gal)
1600L
(355gal)
2000L
(445gal)
3150L
(700gal)

 

5400L
(1200gal)

 

50m
(165ft)

 

1500L
(330gal)
1900L
(420gal)
2850L
(635gal)

 

4900L
(1090gal)

 

60m
(195ft)

 

1350L
(300gal)
1800L
(400gal)
2500L
(555gal)

 

4400L
(975gal)

 

70m
(230ft)

 

1150L
(255gal)
1650L
(365gal)
2100L
(465gal)

 

 

 

80m
(260ft)

 

 

1500L
(335gal)

 

 

 

 

90m
(295ft)

 

 

1250L
(275gal)

 

 

 

 

100m
(330ft)

 

 

1000L
(220gal)