Once this information has been obta

Once this information has been obtained, a calculation can be made tosee if the amount of water needed can be supplied by a ram. The formulais: D=(S x F x E)/L Where:

D = Amount delivered in liters per 24 hours.
S = Quantity of water supplied in liters per minute.
F = The fall or height of the source above the ram in meters.
E = The efficiency of the ram (for commercial models use 0.66, forhome built use 0.33 unless otherwise indicated).
L = The lift height of the point of use above the ram in meters.

Table 1 solves this formula for rams with efficiencies of 66 percent,a supply of 1 liter per minute, and with the working fall and lift shownin the table. For supplies greater than 1 liter/minute, simply multiplyby the number of liters supplied.