316L Y-Type Strainer GL41W

Working Principle

When the strainer is in operation, raw water enters from the inlet, flows through the filter screen, and then exits to the pipeline for process circulation, while granular impurities in the water are trapped inside the screen.

As the cycle continues, accumulated particles gradually reduce filtration efficiency, even as incoming raw water keeps flowing in. Filter holes become increasingly blocked, creating a pressure difference between the inlet and outlet.

Once the pressure differential reaches the preset value, the differential pressure transmitter sends an electric signal to the controller. The system activates the drive motor, which turns the shaft through the transmission assembly and opens the drain port for impurity discharge.

After the screen is fully cleaned, the pressure difference drops to the minimum level, and the system returns to its initial normal filtration state.

This 316L Y-type strainer consists of a body, multi-element filter cartridges, backflush mechanism and differential pressure control assembly.

An internal transverse partition divides the chamber into an upper cavity and a lower cavity. Multiple filter cartridges are installed in the upper cavity to maximize filtration area and greatly reduce overall equipment footprint. A backwash suction disc is mounted in the lower cavity.

During normal filtration, turbid fluid flows into the lower cavity, then enters the inner side of the cartridges through partition holes. Impurities larger than the cartridge gap are retained, while purified fluid passes through gaps into the upper cavity and finally discharges from the outlet.

This strainer adopts high-strength wedge-shaped screen, featuring automatic cleaning via differential pressure control and timer control.

When impurity buildup on cartridge surfaces raises inlet-outlet pressure difference to the set threshold, or the preset timer runs out, the electric control box triggers the backwashing cycle.

When the suction disc perfectly aligns with the cartridge inlet, the drain valve opens and the system begins pressure relief and drainage. A negative pressure zone forms inside the cartridge, forcing clean circulating water to flow from the outer side to the inner wall of the cartridge.

Particulate contaminants attached to the inner wall are flushed into the disc assembly and discharged through the drain valve. The specially designed screen creates an internal jet scouring effect to completely remove all debris.

Once pressure returns to normal or the backwash cycle finishes, the entire process maintains uninterrupted medium flow with extremely low backwash water consumption, achieving fully continuous and automatic production.

Application Range

This 316L stainless steel strainer is widely used in metallurgy, chemical engineering, petroleum, papermaking, pharmaceutical, food, mining, power generation and municipal water supply fields.

Typical applications include industrial wastewater treatment, circulating water filtration, emulsion regeneration, waste oil filtration, continuous casting water system, blast furnace water system and hot rolling high-pressure water descaling system in metallurgical plants.

It is an advanced, high-efficiency and user-friendly fully automatic filtration device.