Water & Wastewater Treatment

14 WWT PUMP AND VALVE SUPPLEMENT 2018 In Depth S ubmersible dewatering pumps have one clear goal – to move water, whether it's to another location for reuse or to simply remove water from a low-lying area. For the most part they require minimal maintenance. But before you set and forget your submersible dewatering pumps, there are some preventative maintenance practices you should follow to keep them operating day in and day out, so that productivity keeps flowing in the right direction. And some of the most important practices start long before your submersible pumps hit the job site. A pump that sizes up Electric submersible pumps are the most commonly used pumps for dewatering construction sites because they are small and lightweight. When it comes to maintaining pumps, choosing the right one for the application is one of the most important decisions you'll make. Using a pump that isn't sized appropriately for an application can lead to problems later on, such as a broken sha€, dislodged seal or thrown impeller, any of which will result in costly downtime. To avoid this, there are three things to consider: the material you are pumping; how far you need to pump it; and the elevation to which it will be pumped. If the pump will be moving materials such as sand, gravel or clay, rather than just water, you'll need a model that is rated for that application and is equipped with impellers made of a durable material, for example cast iron. Other materials, such as polyurethane, can handle water, but abrasive materials can cause them to wear out quickly. Electric submersible pumps rated for these applications can typically move materials as large as 25mm in diameter with minimal wear to components. From there you will want to confirm the pump can move water as far as you need it to go. Generally, the farther the pump is from the water site, the more power it will need to move the water to or from that location. And if the water Keep moving Maintaining your dewatering pumps goes a long way, writes Joe Moser, pump product manager, Atlas Copco Construction Equipment

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