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Overview of Y-type Stainless Steel Filter and Its Working Principle

1. What is a flanged Y strainer?

Flange Y straineris an indispensable device on the pipeline of conveying medium, usually installed on the inlet side equipment of pressure reducing valve, pressure relief valve, fixed water level valve, and other equipment of Fanggong filter.

The filter consists of a cylinder body, a stainless steel filter screen, a sewage part, a transmission device and an electrical control part. After the water to be treated passes through the filter cartridge of the flange Y strainer screen, its impurities are blocked.

When cleaning is required, just take out the detachable filter cartridge and reload it after processing, so it is extremely convenient to use and maintain.

2. Working principle of flanged Y strainer

When the flange Y strainer is working, the water to be filtered enters from the water inlet, flows through the filter screen, and enters the pipeline required by the user through the outlet for process circulation, and the particulate impurities in the water are trapped inside the filter screen.

With such a continuous cycle, more and more particles are trapped, and the filtration speed of the flange Y strainer is getting slower and slower, while the imported sewage still enters continuously, and the filter hole will become smaller and smaller.

As a result, a pressure difference is generated between the inlet and the outlet. When the magnitude difference reaches the set value, the differential pressure transmitter transmits an electrical signal to the controller, and the control system starts the drive motor to drive the shaft to rotate through the transmission assembly.

At the same time, the sewage outlet is opened, and the sewage is discharged from the sewage outlet. When the filter screen is cleaned, the pressure difference drops to the minimum value, the system returns to the initial filtering state, and the system operates normally. The filter consists of a shell, a multi-element filter element, a backwashing mechanism, and a differential pressure controller.

The diaphragm in the shell divides its inner cavity into upper and lower cavities, and the upper cavity is equipped with multiple filter elements, which fully enriches the filtration space and significantly reduces the volume of the y strainer flange type. The lower cavity is installed with backwash suction cups.

When working, the turbid liquid enters the lower cavity of the filter through the inlet, and enters the inner cavity of the filter element through the baffle hole. The impurities larger than the gap of the filter element are retained, and the clean liquid passes through the gap to the upper cavity, and finally is sent out from the outlet.

The filter adopts a high-strength wedge-shaped filter screen, which automatically cleans the filter element through differential pressure control and timing control. When the impurities in the filter accumulate on the surface of the filter element, the pressure difference between the inlet and outlet increases to the set value, or when the timer reaches the preset time, the electric control box sends a signal to drive the backwashing mechanism.

When the backwash suction cup is directly opposite to the filter inlet, the drain valve is opened, and the system is depressurized and drained, and a negative pressure area with a relative pressure lower than the water pressure outside the filter element appears on the inside of the suction cup and the flange y strainer element, forcing part of the net circulating water to flow into the inner side of the filter element from the outer side of the filter element. The impurity particles adsorbed on the inner wall of the filter element flow into the pan with the water and are discharged from the blowdown valve.

The specially designed filter screen produces a jet effect inside the filter element, and any impurities will be washed away from the smooth inner wall. When the pressure difference between the inlet and outlet of the filter returns to normal or the timer set time expires, the material flows continuously during the whole process, and the backwashing water consumption is small, realizing continuous and automatic production.

Flanged Y strainer are widely used in the fields of metallurgy, chemical industry, petroleum, papermaking, medicine, food, mining, electric power, and urban water supply.

Such as industrial wastewater, filtration of circulating water, regeneration of emulsion, filtration of waste oil, continuous water system in metallurgical industry, blast furnace water system, high-pressure water treatment system for hot rolling, it is an advanced, efficient and easy-to-operate fully automatic filter.

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