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Gas filter is widely used in metallurgy, chemical industry, petroleum, papermaking, medicine, food, mining, electric power, city, home and other gas fields. The gas filter is an indispensable device on the medium pipeline. It is usually installed at the inlet end of the pressure reducing valve, pressure relief valve, flowmeter, positioning valve or other equipment to eliminate the impurities in the medium, protect the normal use of the valve and equipment, and reduce the maintenance cost of the equipment. When the fluid enters the filter with a filter element, its impurities are blocked by the filter element, and the clean filter gas is discharged from the outlet of the filter. When cleaning is needed, just disassemble the filter cartridge, take out the filter element, and then install it again after cleaning. Therefore, the use and maintenance of the gas filter is convenient.
1. The gas filter should be installed in front of the pressure regulator and must be installed according to the gas flow direction indicated on it;
2. The gas filter is composed of washable synthetic materials. When installing the filter, the cover should be opened easily to facilitate cleaning and inspection.
3. The gas filter can be installed on the horizontal and vertical pipeline, do not install the filter on the unstable foundation
4. Before maintenance, please make sure that there is no gas in the gas filter. After that, remove the filter screen, clean it with corresponding detergent, then dry it naturally, and then re install it.
5. After installation, the sealing test must be done. During ventilation, the instantaneous air volume should not be too large.
b、设备停车时，应及时按规定对快开盲板 (法兰盖)的各个转动进行润滑，开闭部位的丝杠，应涂润滑油脂. 其它部位也尽量涂润滑油脂. 对于无法涂润滑油脂的部位，可注 10#或20#机油。
3) 设备内部有压力时. 不得进行任何维修。对于特殊情况下的维修. 必须严格遵守“容规”第 122条的规定进行。
1) 本设备长期停放时. 应将设备内液体排净。
1. Daily maintenance
a. Always keep the surfaces clean.
b. When the equipment is shut down, each rotation of the quick opening blind plate (flange cover) shall be lubricated in time according to the regulations. The lead screw at the opening and closing parts shall be coated with lubricating grease. Other parts shall also be coated with lubricating grease as far as possible. For parts that cannot be coated with lubricating grease, 10 # or 20 # oil can be injected.
2. Maintenance during operation
a. It is suggested that the operator should be responsible for the normal maintenance of the equipment
b. Always keep the surface of equipment clean.
c. Monitor the reading of the differential pressure gauge at any time. When the differential pressure reaches 0.o2mpa,
The filter element should be flushed.
3. Inspection cycle
1) The regular inspection of the equipment must be carried out in strict accordance with the relevant provisions of Chapter VI of the "capacity regulation".
2) Carry out comprehensive inspection and wall thickness measurement for the equipment at least once a year, and carry out non-destructive testing for pressure bearing welds of the equipment every two years. All inspection and test results shall be recorded in the technical file of the equipment.
3) No maintenance is allowed when there is pressure inside the equipment. For the maintenance under special circumstances, it is necessary to strictly comply with the provisions of Article 122 of the "capacity regulation".
4. Long term maintenance
1) When the equipment is parked for a long time, the liquid in the equipment should be drained.
2) Close all valves.
3) Clean the surface of the equipment thoroughly.
4) Apply anti grease to all rotating parts.
5) Cover the equipment with canvas to prevent dust from depositing on the surface of the equipment.
Parameters for filter selection: filter medium, maximum pressure and diameter.
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