By World Health Organization(WHO)
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Extra resources for Standard Model Designs for Rural Water Supply
The suction and delivery pipes for the pumping station are of flanged steel, as are the filter feed and water collection pipework. The domestic supply piping is of galvanized threaded steel pipe and the piping for the chemical dosing is of PVC. 0 litres per second are required, with a maximum total delivery head of 85 m. The pump and the electromotor should be mounted on a common base plate. 40 Automatic air release device (when necessary) One air pump with an air vessel with a volume of about 1 50 litres, fitted with a float or electrode type automatic control system, is required, along with a circulating tank of about 30 litres capacity if necessary.
The upper flange of the strainer must be submerged at least 60 cm below the minimum water level to avoid the possibility of air suction. The inner diameter of the suction pipe should be designed so that the flow velocity does not exceed 1 m/s during pumping or siphoning. In the collection well, the end of the siphon pipe should also be located 60 cm below the minimum water level. The pipework in a captation well has no valves, although in a collection well the siphon pipelines have valves to allow flow adjustment.
0 litres per second are required, with a maximum total delivery head of 85 m. The pump and the electromotor should be mounted on a common base plate. 40 Automatic air release device (when necessary) One air pump with an air vessel with a volume of about 1 50 litres, fitted with a float or electrode type automatic control system, is required, along with a circulating tank of about 30 litres capacity if necessary. Water hammer damping device (when necessary) One air compressor with a capacity of 1 5 m 3/h of air, to be compressed to the pressure of 1 MPa, is required, along with an air vessel of about 1 m 3 capacity, designed for the same pressure.