SCF-SY Hand-cranked Brush Filter

Introduction:

The hand-cranked brush filter is a simple and efficient filter composed of a filter cylinder, stainless steel mesh (wedge wire mesh, perforated mesh), stainless steel brush with handle, pressure gauge, drain valve, and other components. When impurities accumulate on the filter mesh, a pressure difference occurs between the inlet and outlet. When the pressure difference reaches the process requirement, cleaning is needed. During cleaning, there is no need to disassemble any parts of the filter; simply open the drain valve and rotate the handle 3-4 turns to easily achieve effective cleaning.

Working Principle:

When water flows through the filter, impurities in the water are intercepted. When the pressure difference between the inlet and outlet reaches a certain value (0.04MPa), it indicates that the filter mesh is clogged and needs to be drained. During drainage, just open the drain valve and gently rotate the handle several turns to brush off coarse impurities from the filter mesh and discharge them through the drain outlet. Stop brushing and draining when the water quality from the drain outlet becomes clear. The water flow is continuous during brushing, so there is no need to stop the machine or disassemble the filter to clean the internal mesh.

Performance Features:

● Space-saving precision design with a linear structure.
● Uses high-precision, high-strength wedge wire mesh with filtration accuracy ranging from 200 to 5000 microns.
● Simple cleaning method: stainless steel brush (nylon brush).
● No interruption of flow during backwashing.
● Minimal backwash water consumption, not exceeding 1% of total flow.

Product Parameters

Single unit processing capacity: 10-900 t/h

Minimum working pressure: 0.1 MPa

Maximum working pressure: 1.6 MPa

Pressure loss: ≤0.02 MPa

Filter element accuracy: 200-5000 microns

Standard pressure: 1.0 MPa, 1.6 MPa

Shell material: Carbon steel, 304 stainless steel

Filter mesh material: 304, 316L

Flange connection size according to GB9119.8-88, special customization available upon user request

SCF-SY Dimension Specification Table

Installation and Usage Notes:

The SCF-SY hand-cranked brush filter can be installed horizontally or vertically, but the water flow direction must be consistent with the arrow direction on the shell. When installed vertically, the water flow must be from top to bottom. When the pressure difference between the inlet and outlet reaches 0.04 MPa, open the drain valve and manually rotate the handle gently to brush the filter mesh until the water quality from the drain outlet becomes clear, then stop brushing and draining. The system can operate normally throughout the drainage process without shutdown.

Scope of Application:

It is suitable for various water supply systems and industrial cooling water systems, especially for long-term continuous operation systems without shutdown (such as cooling towers, steel mills, paper mills, food processing plants, mining, industrial wastewater, etc.). It can filter out various mechanical impurities in the water and remove impurities attached to the filter mesh, ensuring the safe and reliable operation of system equipment.

 Dirty water enters from the filter inlet, first passing through the coarse filter screen to remove larger particles, then reaching the fine filter screen. During filtration, the fine filter screen gradually accumulates dirt and impurities from the water, forming a filter impurity layer. Because the impurity layer accumulates on the inside of the fine filter screen, a pressure difference forms on the inside and outside of the fine filter screen. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal is sent to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel spiral up-and-down moving suction scanner. It is hollow in structure, with several suction nozzles vertically distributed at certain distances along its axis. The inside of the suction scanner communicates with the 3” drain valve. When the drain valve opens, the pressure difference between the internal water pressure of the filter and the external atmospheric pressure generates strong suction at each suction nozzle. At each suction nozzle, water flows rapidly from outside to inside in reverse, washing impurities attached to the inner wall of the filter screen into the suction nozzle, through the hollow shaft of the suction scanner, then discharged through the drain valve, completing the cleaning process which takes about 30-60 seconds. At this time, the pressure difference returns to normal, the cleaning process ends, and filtration resumes. During cleaning, the system continues to flow.