Atlas Copco Power and Flow has completed its portfolio of WEDA electric submersible dewatering pumps, in the process adding a new range for slurry applications.
The range now comprises three families; the expanded WEDA D for dewatering, WEDA S – also expanded – for sludge, and the entirely new WEDA L slurry family.
WEDA D pumps handle either clean or dirty water, even with small solids, while the WEDA S range supports dewatering of liquid sludge containing larger solids. The WEDA L products are the toughest, Atlas Copco says, having the largest apertures to facilitate handling of slurry with the most challenging solids.
“The WEDA D family expansion is marked by the D80, a new model for dewatering,” Atlas Copco said. “S30, and S60, as the new models for the WEDA S sludge family, can handle thick, soft, wet mud or other similarly viscous mixtures of liquids and solids, especially the product of an industrial or refining process. The completely new WEDA L family handles semi-liquid slurry mixtures, typically of fine particles of manure, cement or coal, and water.”
Aside from optimising performance, a lot of focus has been given to making the pumps lighter, enhancing electrical safety, improving the seal design and easing installation, Atlas Copco said. All pumps in the D and S range are available with WEDA+ features, which include phase failure protection, rotation control, thermal switches and a 20 m cable with phase shifter plug for all three phase pumps. The WEDA+ features are also available as an option on the L range.
Overall, the WEDA D pumps, which use top-discharge, can handle water of specific gravity to 1,100 kg/m³, and, depending on model, solids of 4-12 mm diameter. The bottom side discharging WEDA S pumps’ capabilities extend to water with specific gravity to 1,400 kg/m³, and solids of 25-50 mm, depending on model. The WEDA L pumps, which also use bottom side discharge, handle water of specific gravity up to 1,700 kg/m³, and, depending on model, solids of 20-60 mm diameter.
The company said: “The pumps’ specifications equip them well for an extensive range of dewatering applications; they provide the performance, reliability and ease of use and maintenance essential to users across multiple industries.
“All models feature a built-in starter and motor protection system along with optional automatic level control. Adjustable wear-resistant rubber diffusors and hardened high-chrome impellers ensure durability in tough environments.”
Hrishi Kulkarni, Product Manager, Atlas Copco Power and Flow division, said: “The WEDA pumps can handle flow rates of up to 16,500 l/min, with power ratings up to 54 kW. Accordingly, they make ideal dewatering solutions across many, diverse applications within the construction, industrial, emergency and maintenance sectors. Now, our ubiquitous coverage has been highlighted by these latest additions to the range, as they make our portfolio complete.”
Handling and transportation are eased by the pumps’ weight, which is 20% lower than competitor products, Atlas Copco said, adding that this makes them especially attractive for rental use.
Ease of operation is carefully balanced with high performance, with some models’ ability to pass solids of up to 2 in (51 mm) through the pump. An improved aluminium alloy provides higher corrosion resistance over all applications, while reinforced cable entries assure higher resistance to water leakage.
“Uptime is maximised through several measures,” the company said. “All pumps have seal types appropriate to their size, and an external plug for grease filling or an oil inspection plug for easy maintenance. With many connection options and sizes, discharge connections are adjustable, with flow direction changeable from 90-180°.