Strainers work by trapping and removing solid particles from liquids flowing through industrial or process fluid pipelines. Park Process manufactures a variety of strainer types optimized for specific applications, including simplex strainers, Y strainers, T strainers, basket strainers, duplex strainers, and automatic strainers.

Simplex strainers consist of a single strainer basket or screen that traps the solids. Once the strainer is full, the flow of fluids must be stopped to clean the strainer. Y strainers have a Y-shaped body fitted with a strainer screen in the filter leg. Liquid enters the strainer through the main channel inlet, and solid particles are collected on the inner surface of the screen. The screening media and collected debris are removed through a bolted chamber cover. T strainers have a T-shaped body fitted with a strainer screen that collects debris as liquids pass through the device. It can be opened for cleaning without stopping the flow of fluids. Basket strainers have a cylindrical body fitted with a removable basket. Solid particles and debris are collected in the basket as the liquid passes through the strainer. Once the basket is full, it can be easily removed, cleaned, and placed back into the strainer device. Duplex strainers consist of two parallel strainer housings with isolation valves. When one strainer is full, the flow can be diverted by closing the isolation valve. This allows for filter media cleaning without interrupting the process fluid flow. Automatic strainers use a self-cleaning rotating or oscillating screen to remove solid particles from flowing liquids.