Spectra Watermakers Ventura 150T MPC, Installation And Operating Manual

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1. Product Flow: Product flow is expressed in Gallons Per Hour (GPH) or Liters Per Hour (LPH), by
this equation:
3600 ÷ time in seconds x quantity of water in gallons or liters=GPH or LPH
There are 3600 seconds in an hour.
Example: It took 3 minutes and 35 seconds to collect 1 gallon of product water.
3600 ÷ 215 x 1 = 16.74 GPH (3 minutes, 35 seconds is 215 seconds)
Example: It took 2 minutes and 25 seconds to collect 2.5 liters of product water.
3600 ÷ 145 x 2.5 = 62.07 LPH (2 minutes, 25 seconds is 145 seconds)
2. Total Flow or Feed Flow: Feed flow or total flow (brine + product) is expressed in Gallons Per
Minute (GPM) or Liters Per Minute (LPM) , by this equation:
60 ÷ time in seconds x quantity of water in gallons or liters = GPM or LPM
Example: It took 1 minute and thirty-seven seconds to collect 5 gallons of total flow.
60 ÷ 97 x 5 = 3.09 GPM (1 minute, 37 seconds is 97 seconds)
Example: It took 53 seconds to collect 12 liters of total flow.
60 ÷ 53 x 12 = 13.58 LPM
3. Recovery Rate: Product Flow ÷ Total Flow = Recovery Rate %
Example: 6.5 GPH product flow = .063 or 6.3%
1.7 GPM total flow x 60
(you must first multiply total flow by 60 to convert from GPM to GPH)
*pressure relief valve open ½ turn
In order to make good quality product water, you need the proper amount of feed water flow, as in
the table above. Compare the product flow to the total feed flow. Product flow should be 6.5% mini-
mum 5.5%) of total flow for a Ventura 150, and 9% (minimum 8%) of total flow for a Ventura 200T. If
product percentage is low, you may have an internal leak in the Clark Pump.
For every
1
/
10
th
of a GPM feed water flow loss, we will lose about
1
/
2
gallon per hour of product flow
and the salinity will go up 100 PPM.
Low feed flow combined with low system pressures is most frequently caused by a worn Shurflo
pump head (PL-PMP-SFPH).
System
Feed Static * Feed Flow Product Flow
Pres-
sure
Pres-
sure Flow MIN MIN Flow Flow MIN MIN
psi bar psi gpm lpm gpm lpm gph lph gph lph
Ventura 60 - 70 4.2 - 5 10 - 15 1.7 6.4 1.65 6.2 6.5 24.6 5.7 21.5
VT 200 80 - 90
5.6 -
6.3 20 - 25 1.7 6.4 1.6 6.0 8.3 31.4 7.7 29.1