Shanghai Valve Factory Guilong valve filter product installation is as follows:
(1) Suction filter
The Guilong valve filter is arranged on the suction line of the pump to filter out the pollutants entering the air through the air hole in the fuel tank, which has the function of protecting the pump. However, in order to avoid the cavitation of the pump, it is necessary to pay sufficient attention to the pressure loss. Generally, a coarse metal mesh or a notched wire material of 100-200 mesh is used. Therefore, it is not a filter that controls the pollution concentration of the system.
(2) Guilong pump valve high pressure line filter (A)
It is located on the outlet pipe of the pump and has the function of protecting the pollutants from entering the system. Therefore, the concentration of pollutants in the system can be controlled. However, because it is a high-pressure main line, it is subject to pump pulsation and pressure shock, so the material and strength of the filter element should be carefully considered.
(3) Guilong pump valve high pressure line filter (B)
In the system, this filter, also called the end filter, is installed in order to protect hydraulic components that are particularly sensitive to contamination. Therefore it tends to be smaller than other filters. Therefore, you should choose a large capacity when using it. In addition, the material of the component has the same strength as (A).
(4) Shanghai Guilong Valve Return Filter
It is located in the return line of the system and is used to capture contaminants generated or intruded in the system before returning to the tank. It is therefore the most effective and important filter for controlling system contamination concentrations. Although it is a low-pressure pipeline, depending on the operating conditions of the transmission, pulsation or pressure shock may occur, so the material and strength of the components should be fully considered.
(5) Shanghai Guilong valve circulation filter
It is located on the return line of the fuel tank cycle. The capacity of the system is large, so it is often used when strict cleaning is required. Even if the system is not working, the pollutants in the tank can be trapped. Therefore, the efficiency of reducing the concentration of pollution can be reduced. the best. In addition, a cooler is installed, which has the advantages of being able to perform cooling at the same time and being easy to maintain. However, special pumps and motors are required, which are expensive.
(6) Shanghai Guilong pump valve air filter
It is installed on the fuel tank to prevent the pollutants from being mixed into the fuel tank with the air due to the change of the oil volume of the fuel tank. Therefore, the filtration precision should have the same performance as the filter, and the capacity should have sufficient space to prevent the internal pressure of the oil tank from becoming negative pressure due to the blockage of the hole, causing the cavity phenomenon of the pump. Pay special attention when the surrounding environment is bad.
Regarding the above filters, the installation location should be selected according to the characteristics of the equipment. Specific selection points:
(1) In general low-pressure devices with a pressure below 140kg/cm2, only suction filters are usually installed, but return filters and air filters should also be installed.
(2) In general medium and high pressure liquid devices with a pressure of 140 kg/cm2 or more, a common reflux filter is used to control the pollution concentration. However, when there are special requirements for reliability, high-pressure line filters should be used in combination.
(3) In order to increase the reliability of the electromagnetic proportional control valve or the micro flow adjustment valve, a terminal filter should be provided.
(4) When using the servo valve, efforts should be made to reduce the pollution concentration of the system. Therefore, high pressure and return filters should be used in combination; in large capacity, a circulation filter should be installed, and a terminal filter should be installed on the auxiliary line.