Functions and Applications of Ceramic Homogenizer Pistons
04 November 2019
Industry research and development departments have been looking at heat-resistant ceramics for ages. Added to a sports car engine, stabilized zirconia forms a fatigue-resistant finish around a finely tuned powerplant’s pistons. With the ceramic lining handling the heat load, the engine goes on to live a long life. Then, at the other end of the application spectrum, we have homogenizer pistons, which are entirely made out of ceramic.
A Study in All-Ceramic Homogenizer Pistons
The engine pistons still have alloy parts, which are coated in layers of ceramic. Granted, that’s a fascinating application area, but it’s not one that fits the bill here, not this time around. As for how we derive homogenizer reciprocating power, these cylindrical parts are 100% ceramic. This is a food industry application. By definition, the materials used here must be food-safe. Ceramic homogenizer pistons slot nicely into place in this hygiene-essential usage domain. With the cylinders fabricated out of this inorganic compound, they’re sure to be smooth. That means there are no microscopic pores for tiny microbial colonies to inhabit. What’s more, since ceramic parts are so glossy, they’re easy to clean. At the end of the day, after the fatty globs of dairy fluid have been broken down and processed, a hot jet of water, plus a little soap, can be used to clean the pistons.
Homogenizer Functionality: Looking at the Big Picture
This is a surprisingly broad equipment manufacturing sector. There are homogenizers on large farms and food processing plants. They forcefully break down the fat content in milk and yoghurt so that consumers can purchase their vitamin-enriched drinks as wholly fluidized beverages, not as cream-choked broths. Of course, not any old machine cylinder can carry out this workhorse duty. Hygienic, food-safe ceramics are preferred. Along with certain stainless steels, no other materials can be used, not when the fluid stream is bound for a market where it’ll be sold as an edible or drinkable commodity. But then there’s the fact that homogenizer pistons operate under torturous conditions. Milk is slightly corrosive. The lactic acid is “homogenized” by the pistons until the fluid’s temperature rises to 140°C. The fluid medium is also pressurized. This is a hostile environment, one that must output a consumer-friendly final product stream.
Used in science laboratories and food-grade equipment, ceramic homogenizer pistons are manufactured in a way that satisfies many industry standards and codes. Manufactured straight as an arrow, the ceramic parts must comply with the most stringently enforced dimensional tolerances. The pistons also need to be capable of handling process-choking pressure transients, acidic compounds, high operating temperatures, and parts-fatiguing equipment stroke rates.
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