Wear rings are sacrificial components installed on the casing and impeller to inhibit fluid from recirculating back to suction from the discharge. They provide a renewable restriction between a closed impeller and the casing. Wear rings act as the seal between the casing and the impeller. Pump manufacturers know that decreasing wear ring clearance leads to improved efficiency.

Are you looking for a better way to rebuild these wear ring areas? Here are a series of pictures from Belzona Consultant Allan Montgomery. This is a shipyard fire pump, rebuilding wear ring seats is a standard repair across all industry types.

Early pictures show the volute has been repaired with Belzona 1311 (Ceramic R-Metal) using the Belzona applicator as a mold. Several balled up rags are holding the Belzona applicator tight in place while the Belzona 1311 is applied and shaped. Once it is hard, the Belzona 1311 is filed to fine tune the shape. Also, the shoulders in the packing area are being rebuilt using a large washer and release agent. The wear ring seats on the bottom casing are repaired by molding, using the rotating assembly and new rings with release agent. The wear rings are shimmed concentric to the shaft. Belzona 1311 was applied to the wear ring seats and the rotating assembly immediately bolted into place. While the Belzona 1311 is still soft the shoulders of the seats were built up.

Would you like to learn how to perform these types of time and cost saving repairs to your component equipment? We offer training classes along with educational In-Plant seminars.

Tell us, how can we help you repair, protect and improve your component equipment?

Stephanie Rumford
srumford@rumfordgroup.com
937-435-4650
RumfordGroup.com