• Date: 05.09.2019 – 09.09.2019
• Device type: Inlet Pump of MP1 covering
• Localization: Mondi Świecie S.A.
• Manufacturer: Sulzer
• Type: ZPP 51-600

After cover disassembly, damage and bubbles formed during the operation of the MP1 pump were visible. The cavities and blisters visible in the photos were most likely caused by incorrect application of ceramics or preparation of the surface for ceramics by the previous contractor of the refurbishment of this pump.

The photo above shows the abrasion of the ceramic surface at the point of the highest mass flow in the lower body of the MP1 pump. This is most likely due to a too thin layer of ceramics applied in this area or, similar to the filler cover, possibly poor surface preparation for ceramics.

The surface of the pump body cover was thoroughly blasted, then the surface was protected with the F7 degreaser by Chester Molecular

The surface of the MP1 pump body cover was covered with two layers of Chester Molecular ceramics - CF ceramics for the first layer and F ceramics for the second layer. In addition, the surfaces have been polished and the threading on the water connections has been improved.

The photo from the assembly of the lower body. As in the case of the filler cover, the lower body was thoroughly blasted, degreased with Chester Molecular F7 agent, then two layers of Chester Molecular ceramics were applied - CF ceramics on the first layer and F ceramics on the second layer. In addition, the surfaces have been sanded and gaskets glued to the flanges.

The photo above shows the lower body of the MP1 pump during installation of the rotating assembly. The assembly was performed by the PMP Rolls company.

The photo above shows the MP1 pump after installation on the stand. The pump has been equipped with water systems for seals, protective covers have been installed. In addition, the appearance of the pump has been refreshed by thorough descaling of the body.