Grindex submersible drainage pumps and sludge pumps have been known to the mining and construction industries since 1960. The pumps are known for their high reliability, durability and dependability in demanding applications. Thanks to the built-in motor protection and the air valve, the pumps can run unsupervised for longer periods.
Grindex submersible drainage pumps are used for pumping fluids with abrasive particles. They are commonly used for dewatering in applications like mining and construction sites and in quarries. The pumps are equipped with an electronic motor surveillance and air valve that enables dry-running capabilities. The drainage pumps have a capacity up to 330l/s and a maximum of 110m of head pressure.
Grindex submersible sludge pumps are used for pumping fluids with solids up to the size of a tennis ball without clogging in numerous demanding applications. The pumps are equipped with an electronic motor surveillance and air valve that enables dry-running capabilities. The sludge pumps have a capacity up to 45l/s and a maximum of 47m of head pressure.
Grindex's Bravo slurry pumps are designed for pumping slurry and other fluids with high concentrations of abrasives, like sand and stones. The wear problem is solved by producing hydraulic components in Ni-Hard 4, one of the hardest materials available today. Typical applications include dredging, cleaning of settling ponds, coal and ore slurries, bentonite, coal washing water, sewage treatment plants, steel works, quarries, mines and many other industries. The Bravo pumps can deliver between 30l/s and 130l/s.
Despite their size, these pumps are reliable as a pump failure is not an option in demanding applications. Rescue teams around the world discovered this long time ago and have been using Grindex pumps for decades. Grindex's smallest drainage pump weighs only 13.5kg, while the smallest sludge pump weighs 15kg.
Stainless-steel pumps for corrosive applications
Grindex's Inox range of submersible drainage and sludge pumps are constructed from stainless steel, and are capable of handling extremely corrosive fluids with pH values from 2-10.
Inox pumps are intended for use in demanding applications such as mines, process industries, fish farms and harbours, which can quickly destroy conventional pumps. With its impressive allowed pH range, from 2 up to 10, it is hard to find an application that can't be handled by the Inox pumps. All materials in contact with the liquid are made out of AISI 316 stainless steel or better.
Grindex drainage and sludge pumps are equipped with the following built-in motor protection:
Air valve: water is generally used to cool the motor in a submersible pump, however there are times when a pump runs dry, overheating the pump. The unique air valve allows the pump to run dry without causing damage to the motor. The impeller acts like a fan and the hot air escapes through the air valve, which opens automatically when the pump starts to 'snore'.
Electronic surveillance: SMART with three-folded protection: Phaseguard? protects the motor against single phasing. It will automatically shut down the pump if this occurs, thus preventing serious motor damage. The Rotasense? controls the phase sequence. It ensures that the motor will only run in the correct direction. This unique feature eliminates overloading, low pumping capacity and abnormal wear. Finally, the temperature guard protects the motor from overheating by automatically shutting down the pump if any stator winding exceeds 130°C (266°F).
Grindex pumps have proven their reliable and durable performance in a variety of challenging applications, including building and construction sites, mining and tunnelling, power plants, rental, quarries, steel mills, rescue operations, different types of industries and other areas where reliable and highly dependable pumps are required.