{"id":6851,"date":"2025-10-21T14:06:51","date_gmt":"2025-10-21T12:06:51","guid":{"rendered":"https:\/\/www.cdrpompe.com\/?p=6851"},"modified":"2026-05-31T17:35:27","modified_gmt":"2026-05-31T15:35:27","slug":"diamond-bushings","status":"publish","type":"post","link":"https:\/\/www.cdrpompe.com\/en\/boccole-diamantate\/","title":{"rendered":"Diamond bushings: a weapon against dry running"},"content":{"rendered":"

The operational reliability of magnetic drive pumps largely depends on the quality of the components that make up the support and sliding system: among these, the diamond bushings<\/strong> today represent a highly advanced technological solution capable of counteracting one of the most feared risks in systems, namely dry running.<\/p>\n

In cases where the lubricating fluid separating the shaft and bushings is lost, direct contact between surfaces can generate strong friction, heat, and rapid, irreversible damage. In CDR Pompe<\/a> We made the prevention of this phenomenon a priority during the design phase: the adoption of diamond coatings on silicon carbide is a concrete step towards the highest possible safety for plants and personnel.<\/p>\n

The goal is not only to reduce product wear and tear, but above all to offer our clients and business partners a guarantee of operational continuity, eliminating the costs and critical issues related to Machine downtime not scheduled<\/a>.<\/p>\n

Diamond Silicon Carbide Bushings and Trunnions: RSSIC<\/h2>\n

At the heart of this technology is sintered silicon carbide (SSIC), a material already known for its hardness and chemical resistance, which has been further enhanced through diamond coating. The bushings and rings, along with the shaft, are treated using a chemical physical process that deposits an amorphous layer on the surfaces with a crystal lattice similar to that of diamond.<\/p>\n

This microcrystalline coating, designated RSSIC, provides superior resistance to wear and corrosion, transforming the most delicate pump components into parts with extremely high durability.<\/strong> This is not a simple aesthetic or superficial coating: the diamond coating radically modifies the tribological properties of the material, reducing friction and heat generation even under critical operating conditions.<\/p>\n

How Diamond Bushings Work: Making the Difference<\/h3>\n

Under normal operating conditions, the Magnetic drive pump<\/a> they work with a thin liquid film that acts as a lubricant between the shaft and bushings. This film prevents direct contact, reduces friction, and ensures system stability. However, when the film breaks, due to difficult starts, insufficient flow rate, or the presence of vapors, a dry friction regime occurs, with immediate effects on wear. This is where the diamond bushings <\/strong>they manage to prove their value: the coating drastically reduces the coefficient of friction, minimizes thermal rise, and limits damage from direct contact.<\/p>\n

Diamond-coated SiC pairs have much lower coefficients of friction compared to traditional SiC pairs under dry sliding conditions. This means increased safety during unexpected transients and greater tolerance for operating errors.<\/p>\n

The riskiest situations for running dry<\/h3>\n

Every industrial process involves variables that can alter a pump\u2019s hydraulic behavior. The most dangerous variables for a complex system are, of course, those that are impossible to predict, since even a few moments of abnormal operation are often enough to trigger events that can damage the entire infrastructure.<\/p>\n

The dry frost<\/a> it is therefore not a rare event, but a concrete risk that can manifest itself in different phases of the production cycle, from initial startup to sudden load variations. Analyzing the typical situations in which the liquid lubricating film fails is fundamental to understanding the added value of diamond bushings<\/strong>, which offer a margin of protection where operating conditions become more critical.<\/p>\n