ANDRITZ Stainless Steel SS316 SS304 Carbon Steel Pump Impeller Wear Ring

Our brand delivers turnkey fluid machinery capabilities to industrial clients worldwide — encompassing everything from individual precision components to engineered system solutions, reinforced by direct technical support and field service deployment. The businesses we serve include pump and rotating equipment supply, frequency converter and drive electronics, servo control systems, operator interface and programmable logic control panels, motor management and switchgear assemblies, electric rotating machinery and geared speed reducers, mechanical seal systems and packaged seal assemblies, flexible shaft coupling hardware, and gearbox and transmission engineering. For clients requiring hands-on support, we dispatch our own specialists overseas to perform FARO 3D scanning of pump internals for reverse manufacturing, precision laser alignment of pump and driver trains, start-up and performance verification of newly installed equipment, and on-site diagnosis and rectification of operating machinery.

ANDRITZ Wear Ring (also known as a casing ring, impeller ring, or side plate ring depending on the pump configuration) is a replaceable annular component installed at the running clearance interface between the rotating impeller and the stationary pump casing. Its primary function is to create a controlled close clearance that minimizes internal recirculation of pressurized fluid from the discharge region back to the suction side of the impeller.

As the wear ring clearance increases over time due to erosion, corrosion, or mechanical wear, internal leakage grows and pump volumetric efficiency declines. Because wear rings are designed as replaceable sacrificial components, restoring the original clearance by installing new rings is a straightforward and economical way to recover pump performance without replacing the more expensive impeller or casing.

Our ANDRITZ wear rings are manufactured from selected material grades, machined to the required fit tolerance, and supplied with dimensional inspection reports.

• Pump Efficiency — As wear ring clearance enlarges, more fluid recirculates internally instead of being delivered to the discharge. This directly reduces pump volumetric efficiency
• Operating Cost — A pump running with worn wear rings consumes more power to deliver the same flow, increasing energy cost over time
• Component Protection — The wear ring is designed to wear sacrificially, protecting the more expensive impeller and casing surfaces from direct erosion
• Cost-Effective Restoration — Replacing wear rings is significantly less expensive than replacing the impeller or casing, while recovering most of the lost efficiency