Day & Zimmermann deploys plastic or metal scrapers, stainless steel and nylon brushes, plastic pigs, abrasive balls, low and high pressure water systems, air and water systems, and rotary type systems as appropriate to clean heat exchanger tubes. Day & Zimmermann is capable of cleaning two or more units simultaneously.
By removing most types of deposits — from bio-fouling to calcite-type scaling — Day & Zimmermann tube cleaning services help restore condensers and heat exchangers to their designed cleanliness factor and efficiency, improving performance and tube life while reducing operating costs and tube failures.
Using current Heat Exchanger Institute (H.E.I.) Standards for Steam Surface Condensers, Day & Zimmermann's tube uplift analysis compares existing tube material (i.e., "designed for") to new materials incorporating lighter weight and/or thinner wall tubes.
Day & Zimmermann's Vibration Analysis determines whether or not the existing support plate spacing exceeds the maximum allowable spacing as specified by HEI standards. Vibration analysis considers steam flow, tube size, pitch, tube material, circulating water flow, neck area, and existing support plate spacing.
The vibration analysis specifies the maximum allowable unsupported tube spacing for the design operating conditions and the condenser pressure at which the maximum allowance unsupported spacing occurs.
Day & Zimmermann also offers mass spectrometry leak detection for heat exchanger tubes.
Day & Zimmermann’s patented S-Flex rubber expansion joint overcomes the most significant issues inherent in the conventional, rigid, “dog bone” design.
The unique preformed “S” shaped web allows for a full range of adjustability during installation, effectively eliminating the common issue of misalignment. The flexibility of Day & Zimmermann's S-Flex reduces the loads imparted to the turbine and clamping components by as much as 85% to 90% while decreasing the potential for air in-leakage.
The S-Flex design uses only three layers of fabric — each side skim-coated with rubber during the manufacturing process. This skim-coating process greatly increases the amount of rubber between plies, leading to better adhesion and an increased rubber-to-fabric ratio.
Day & Zimmermann's S-Flex rubber expansion joints are offered in two sizes, accommodating nearly every standard application. It is designed to be compatible with the existing “dog bone” hardware and components: