Filter installation precautions
The filter is an indispensable device on the conveying medium pipeline. It is usually installed at the inlet of other equipment such as pressure reducing valve, pressure relief valve, water level valve and square filter. The filter is composed of a cylinder, a stainless steel filter screen, a drainage part, a transmission device and an electric control part. After the water to be treated passes the filter cartridge of the filter, its impurities are blocked. When cleaning is needed, as long as the detachable filter cartridge is taken out and re-installed after processing, it is extremely convenient to use and maintain.
The installation position of the oil filter in the hydraulic system is usually as follows:
⑴To be installed at the suction port of the pump:
Surface oil filters are generally installed on the pump's suction path to protect large hydraulic particles by filtering out large foreign particles. In addition, the filtering capacity of the oil filter should be more than twice the flow rate of the pump and the pressure loss should be less than 0.02 MPa.
⑵Installed on the oil outlet of the pump:
The purpose of installing the oil filter here is to filter out contaminants that may invade components such as valves. Its filtering accuracy should be 10 ~ 15μm, and it can withstand the working pressure and impact pressure on the oil circuit, and the pressure drop should be less than 0.35MPa. At the same time, a safety valve should be installed to prevent the oil filter from being blocked.
(3) Installation on the oil return path of the system: This installation plays an indirect filtering role. Generally, a back pressure valve is installed in parallel with the filter. When the filter is blocked and reaches a certain pressure value, the back pressure valve is opened.
⑷Installed on the branch oil circuit of the system.
⑸Separate filter system: Large hydraulic system can be equipped with a hydraulic pump and oil filter to form an independent filter circuit.
In addition to the oil filter required for the entire system in the hydraulic system, a special fine oil filter is often installed separately in front of some important components (such as servo valves, precision throttles, etc.) to ensure their normal work.