Tubular backwash filter is a filter that can use low quality water to stop industrial cooling. It has a handle on its shell to control the middle butterfly valve to turn. When cleaning the filter bladder, just turn it into the handle to complete The original extremely tedious cleaning process has improved the application value and is currently the first choice for economical application.
Its biggest features are: cumbersome operation, not occupying space, no need to remove and wash, large filter area, low filtration resistance. Cleaning can be stopped during the work of the filter without interruption of flow and without affecting the normal operation of the equipment.
According to the media flow direction of the filter, it can be divided into: DC backwash filter, baffle backwash filter.
Working principle 1. The manual butterfly is opened in normal working state, that is, the plane of the valve plate is parallel to the axis of the filter cylinder, (the wrench is also parallel to the axis of the cylinder). At this time, the water flow directly enters the inside of the filter cylinder from the inlet. It is discharged through the outlet after being filtered by a strainer.
2. In the backwash working state, the manual butterfly is closed, that is, the plane of the valve plate is perpendicular to the axis of the filter cylinder. (At this time, the wrench rotates 90 degrees perpendicular to the axis of the cylinder to open the drain valve. At this time, the water flows from the inlet to the front of the filter cylinder. Because the butterfly valve is closed, the water flow is blocked by the valve plate, and can only enter the outside of the filter cartridge from the front mesh, and mostly flow out from the outlet, and then recoil from the mesh at the rear of the filter into the mesh cartridge, so as to reach the outside of the filter. The purpose of the impurities adhered to the inner wall of the mesh cylinder. However, because the drain outlet is opened, the pressure of the water discharged from the rear part of the filter cartridge is reduced, so a local water impurity and sewage are discharged from the drain outlet.
Scope of application 1. Weakly corrosive materials in chemical and petrochemical consumption, such as: water, oil, ammonia, hydrocarbons, etc .;
2. Corrosive materials in chemical consumption, such as: caustic soda, soda ash, concentrated dilute sulfuric acid, carbonic acid, uronic acid, etc .;
3. Low temperature materials in refrigeration, such as: liquid methane, liquid ammonia, liquid oxygen and various refrigerants;
4. Hygiene requirements in food and pharmaceutical consumption, such as beer, beverages and dairy products.