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New pumps from Weir Minerals support chemical industry customers

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Weir Minerals has added three new products to its Lewis range of pumps and valves for the sulphur, sulphuric and phosphoric acid industries.

The three new pumps – Lewis VL axial pump, Lewis horizontal process pump and Lewis vertical high pressure molten salt pump – have been designed to maximise wear life in highly corrosive industrial applications, while simplifying maintenance through streamlined designs.

“Although they’re designed to address different challenges, these three new pumps were guided by the same core design principles: using advances in material technology to achieve increased performance and wear life, while reducing complexity to simplify equipment maintenance and give us the flexibility to deliver more engineered to order features that benefit our customers,” explained Jerry Ernsky, Lewis product manager at Weir Minerals.

“Fundamentally, Weir Minerals is in the business of solving tenacious problems that interfere with our customers’ operations, which is why every step of our product development is guided by our customers’ key challenges.”

The horizontal process pump combines long-lasting corrosion and wear resistance with robust performance, efficiency and ease of maintenance. The single-stage, end suction pump has been developed over years of experience and research, and complements the existing range of Lewis vertical acid pumps and valves.

“Suitable for a wide variety of chemical processing applications, our new Lewis horizontal process pump offers efficient performance and superior wear resistance to the growing number of acid plants and fertiliser complexes operating around the world,” Ernsky continued. “Our engineered to order horizontal pumps are customised to support our customers’ goals of reducing plant maintenance and achieving a lower total cost of ownership.”

The new Lewis VL axial flow pump offers heavy-duty construction for use in corrosive, high temperature chemical processing applications, such as evaporator and crystalliser circulation. It can be customised to suit a range of industrial applications, while its low component count makes servicing quicker and easier.

The new pump supports capacities up to 13,628 cubic metres per hour, with up to 0.83Mpa pressure and heads of up to 12m.

Finally, the Lewis vertical high pressure molten salt pump has been designed for the concentrated solar power industry. It is able to handle the multifaceted challenges associated with the extremely high pressures and temperatures associated with pumping molten salt for thermal energy storage,

The molten salt pump can be expanded from 3 to 14 stages, has an integrated protective thermal barrier, a non-contracting shaft seal and a low NPSH first stage. Available with water or air-cooled thrust bearings, the pumps support heads of up to 701m, temperatures of 593°C and up to 10.3Mpa pressure.

Ernsky added: “Our new multi-stage molten salt pump is the first that has been custom designed to meet the unique requirements of the rapidly expanding number of concentrated solar power plants around the world. Lewis pumps have always thrived in the world’s most demanding, high temperature applications and we’re delighted to bring our experience and engineering expertise to this increasingly important source of renewable power.”

All three pumps are made from Weir Minerals’ Lewmet alloys, which incorporate highly specialised metallurgy that can withstand highly corrosive industrial applications involving sulphur, sulphuric and phosphoric acids.