Overview of maintenance and use of check valves
Date:2024-06-08 Click:522
Check valve, also known as one-way valve or non-return valve, is used to prevent the backflow of media in the pipeline. It only allows the medium to flow in one direction and is widely used in various fluid control systems. In order to ensure the normal operation of the check valve and extend its service life, the following is an overview of its use and maintenance:
Overview of use
Installation position: Check valves are usually installed on horizontal pipes, but some types can also be installed on vertical pipes. Make sure that the flow direction of the medium is consistent with the direction of the arrow on the valve body.
Working environment: Select a check valve of suitable material according to the properties of the medium (such as temperature, pressure, corrosiveness, etc.) to ensure that it can operate stably for a long time.
Start and close: The check valve is passively operated and automatically opens and closes by the flow and pressure difference of the medium, without external operation.
Check the operating status: Regularly observe the operation of the check valve to ensure that it can open and close freely under normal working conditions.
Maintenance overview
Regular inspection:
External inspection: Check whether there is leakage, corrosion or other signs of damage on the outside of the check valve.
Internal inspection: Regularly disassemble and check the wear and damage of internal parts (such as valve disc, valve seat, spring, etc.).
Cleaning:
Internal cleaning: Remove impurities and dirt that may accumulate inside the valve, especially when handling media containing solid particles, cleaning should be performed more frequently.
External cleaning: Keep the outside of the check valve clean to prevent external dirt from entering the valve and affecting its normal operation.
Lubrication:
When necessary, properly lubricate the moving parts to ensure that they can operate flexibly. But be careful not to over-lubricate to avoid adsorption of impurities.
Fastener inspection:
Regularly check the fasteners of the check valve (such as bolts, nuts, etc.) to ensure that they are not loose. If looseness is found, tighten them in time.
Seal replacement:
The seals of the check valve (such as O-rings, gaskets, etc.) may age or be damaged after long-term use. They should be checked regularly and replaced as needed to ensure sealing performance.
Fault handling:
If it is found that the check valve cannot be opened or closed normally, or there is obvious leakage, it should be stopped for inspection in time to find out the cause of the fault and repair or replace it.
Professional maintenance:
For check valves in key equipment, it is recommended to ask professionals to perform maintenance and inspection regularly to ensure that they are in the best working condition.
Through the above-mentioned use and maintenance measures, the normal operation of the check valve can be effectively guaranteed, its reliability and service life can be improved, and the safety and stability of the fluid control system can be ensured.
