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Talking about the installation and maintenance knowledge of
Author：通达 Popularity： Issuing time：2018-07-19 17:48
In order to ensure that the internal thread ball valve installation position line is in the coaxial position, the two flanges on the pipeline should be kept parallel, confirming that the pipeline can withstand the weight of the ball valve itself. If the pipeline can not bear the weight of the ball valve, the pipeline is equipped with corresponding support before installation. . Check if there are any impurities, welding slag, etc. in the pipeline, and the pipeline must be purged. Check the nameplate of the ball valve and operate the ball valve fully open and closed several times to confirm that the valve can work normally, and then thoroughly check the details of the valve to ensure that the valve is intact. Remove the protective cover at both ends of the valve, check whether the valve body is clean, and clean the valve body cavity. Since the sealing surface of the ball valve is spherical, even small debris may cause damage to the sealing surface.
Any part of the internal thread ball valve can be installed at the upstream end. The handle ball valve can be installed at any position of the pipeline. If the ball valve of the actuator (such as gearbox, electro-pneumatic actuator) is configured, it must be installed vertically, at the inlet and outlet of the valve. In the horizontal position. If the ball valve adopts pneumatic or electric actuators, follow the instructions to complete the installation of the air source and power supply. After the installation of the ball valve is completed, the ball valve is opened and closed several times. It should be flexible, the force is even, and the ball valve works normally.
Internal thread ball valve maintenance can only disassemble and disassemble the ball valve before and after the ball valve is removed. In the process of disassembling and reassembling the ball valve, it is necessary to protect the sealed parts, especially non-metallic parts, such as O-rings, etc. It is best to use special tools. When the ball valve body is reassembled, the bolts must be tightened symmetrically, stepwise and evenly. The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts and working medium (such as gas) in the ball valve.
When the working medium is gas, the metal parts can be cleaned with gasoline (GB484-89). Non-metallic parts are cleaned with purified water or alcohol. The individual parts that are broken down can be cleaned by dipping. Metal parts that have been left undecomposed by non-metallic parts can be scrubbed with a clean, clean cloth impregnated with a cleaning agent (to prevent the fibers from falling off and sticking to the parts). When cleaning, remove all grease, dirt, glue, dust, etc. that adhere to the wall. Non-metallic parts should be taken out of the cleaning agent immediately after cleaning. Do not soak for a long time.
After cleaning, it needs to be assembled after the wall cleaning agent is volatilized (can be wiped with silk cloth without dipping agent), but it should not be left for a long time, otherwise it will rust and be polluted by dust. New parts also need to be cleaned before assembly. Lubricate with grease. Grease should be compatible with ball valve metal materials, rubber parts, plastic parts and working media. When the working medium is gas, for example, special 221 grease can be used. Apply a thin layer of grease to the surface of the seal mounting groove, apply a thin layer of grease to the rubber seal, and apply a thin layer of grease to the sealing surface and friction surface of the valve stem. Metal debris, fibers, grease (except for the use), dust, other impurities, foreign matter, etc. should not be allowed to be contaminated, adhered or stuck on the surface of the part or enter the inner cavity.
High-pressure ball valve effective and reasonable maintenance
In the maintenance of high-pressure ball valves, we must do it regularly, and we must not be sloppy. If it is easy to forget or ignore it, then develop a plan of relevant measures. When proceeding step by step according to the plan, it must be of great help to the normal use in the future.
When the high-pressure ball valve is not in use, it is best to unplug the power supply, when to use it, and not to accidentally happen because of the sloppy moment, which is irresponsible to others. After each use, pay special attention to cleaning. Any place and details should be well noticed, especially in places where dust is most likely to occur, and it needs to be cleaned regularly.
Maintenance is not only done when a failure occurs, but needs to be put in place every day to help you use it in the future. Therefore, the majority of users, in the maintenance of the best is to give the greatest attention, rather than waiting for a problem every time, and then come to solve the solution, this is not a long-term solution. Only by paying attention to the problem from the root cause is the most crucial.
Source of this article： http://en.tongdavalve.com/news/149.html
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