The sands are running out

The Hartley Sand Trap could mean the end to the curse of sand blocking up filters and irrigation pipes. This simple invention developed and patented by Tim Hartley is worth the while for any farmer or farmers group involved in irrigation. It removes sand from the borehole, at the well-point or the river, while under online pressure. Here is how it works. Sandy water enters the bottom of the Trap equipment under pressure up to 10 bar and clean water comes out from the top of the Sand Trap under the same pressure. The rising speed of the water is slower than the settling speed of the sand which can therefore never reach the Trap s outlet only the clean water can. The accumulated sand can periodically be flushed through from the Trap by opening the flush valve. The maximum flow rate of the trap is 4,000 litres/ hour. For higher flow rates, two or more sand traps would have to be installed in parallel. The device costs ZAR 980 South African Rand (t 142), excluding transport. Oasis Irrigation PO Box 30250, Tokai 7966, Cape Town, South Africa Fax: +27 21 715 80 08 Email: oasisirrigation@iafrica.comThe Hartley Sand Trap could mean the end to the curse of sand blocking up filters and irrigation pipes. This simple invention developed and patented by Tim Hartley is worth the while for any farmer or farmers group involved in irrigation. It..