The Impact Pump adds to the multiple advantages of surface irrigation pumps, whilst bringing efficient and reliable access to groundwater, even from highly turbid sources and varying depths and temperatures.
Infrequent and easy maintenance make the Impact Pump the ideal choice for standpipe and piped water supplies, minimising operational costs for pump replacements and new installations alike.
HOW IT WORKS
The surface drive pump forces water down the well from a surface store or from water being returned to the surface. The Impact Pump generates shockwaves several times per second by interrupting this drive flow. These cause up to two times the drive flow to be sucked into the Impact Pump and returned to the surface with the drive water. The drive and delivery flows are separated at the surface. The Impact pump can efficiently lift up to two times the head across the drive pump.
Initially developed for irrigation, the Impact Pump is a more robust and reliable alternative to all classes of submersible irrigation pumps.
Solar-powered irrigation differs from conventional methods in that water is lifted more gradually and for longer periods of time. It can then be applied cost-effectively by micro-sprinklers, though these need to be moved regularly – or more efficiently by drip irrigation.
The Impact Pump can be coupled to both sprinkler and drip-systems, with or without storage, supplying filtered water with positive pressure to drive pump, nozzle and drippers alike. Alternatively, if surface water is sometimes available, it can draw from this instead, simply by opening a valve. Unlike submersibles, it can share a filter with the distribution system, protecting the drive pump impeller and seals.
Many farmers prefer to add storage to their systems to enable short-duration irrigation without depending on complex distribution systems such as drip. This can be done with raised tanks, as illustrated in the “How it works” section above. Alternatively, the Impact Pump is the only submersible that enables water to be stored AND distributed from surface-level ponds.
The surface drive pump can be used for distribution, discharging water at high flow rate from ground-level stores (left, e.g. in the evening) and recharging them at lower flow rate (right, e.g. using solar power during the day). As low-head distribution requires relatively little power, this is even possible off-grid with solar power alone.
The Impact Pump brings longevity, reliability and ease of maintenance to a wide range of groundwater lifting scenarios for water supply including community water systems (standpipe/hub and spoke), domestic (household) systems and piped reticulation systems.
The Impact pump enables more than one drive pump to operate as part of a standard installation without increasing the well diameter. Depending on requirements and budgets, a second drive pump can be of the same type (e.g. solar), doubling the redundancy of the system, or a different type (e.g. petrol or human power), intended more as a backup solution.
Installations with redundancy or backup enable continuity of supply during periods of maintenance or extended cloud cover. Alternatively, a broken drive pump in an Impact Pump installation can be switched for a replacement in under 2 minutes, enabling drive pump repair off site without interrupting supply.
After well drilling, raised storage tanks and securitisation represent the largest capital costs in many water supply projects. With an Impact Pump, surface level or underground storage tanks become possible without additional complexity, lowering costs whilst enabling roof water catchment too. The surface drive pump can be secured at the surface or installed under a locked steel hatch.
In this example installation, stored water is supplied to a piped reticulation system by the surface drive pump. The surface pump can be configured to drive the Impact Pump and reticulation system in parallel, or independently via a control valve.
Low-head distribution requires relatively little power, making 24h groundwater-fed supply systems reliable in areas with no grid power, or frequent grid outages.
Download a copy of our brochure and review our specifications, instructions and standard warranty conditions here.