Never use plastic strainers for compressible fluids such as air or nitrogen.
The maximum fluid velocity should not exceed 5-8 FPS and our sizing calculators use 5 FPS as the design standard.
It's critical to review your pressure limitations for your fluid temperature and reduce potential Water Hammer situation accordingly.
Plastic Y strainers are used for liquids or environments that are aggressive to alloy strainers and are designed to be installed within non-alloy piping systems. If you intend to install a plastic strainer within an alloy piping system it is recommended that you install at least 10 pipe diameters of plastic piping upstream and downstream of the strainer to help account for differences in thermal expansion rates of metal and plastic, transmittal of pipe vibration and loading forces. Connecting plastic strainers directly with metal piping can potentially damage the strainer.