The most common materials used for Y strainers and Basket strainers bodies are cast iron, bronze, carbon steel, stainless steel, and plastic.
Essentially, Y-strainers have bodies made of the same cast and forged materials of other commercial valves.
Cast Iron
Because of its low initial cost, cast iron is the most popular strainer body. It is used in systems where the pressure and temperature of the water are not high and the system is not subject to high thermal or mechanical shock.
Cast iron is mostly used for larger size potable water lines and many non-potable water systems in addition to a variety of other product and process uses.
Bronze
A bronze body is preferred for brackish, saline, and seawater service. It is often used for potable water services. Its cost doubles that of cast iron.
Carbon Steel
Carbon steel bodies are used with high temperature and pressure applications and when a good resistance to thermal and mechanical stress is required. Carbon steel is used also in the case of applications with fire risk.
Chrome Moly Alloy
For high pressures and temperatures over 1000 °F, chrome-moly steel is usually specified for bodies.
Stainless Steel
Stainless steel is the preferred body, basket, and screen material for the pharmaceutical, food processing, and chemical industries because of its resistance to corrosion and contamination and ease of cleaning. Stainless steel costs about four times as much as cast iron.
The typical material grades for strainers' bodies are cast steel (bore size above 2 inches) and forged steel (bore size below 2 inches).
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