1.
Installation of the
ball valve Preparation before installation 1. The pipeline before and after the ball valve has been prepared. The front and rear pipes should be coaxial, and the sealing surfaces of the two flanges should be parallel. The pipeline should be able to bear the weight of the ball valve, otherwise the pipeline must be equipped with proper support
2. Purge the pipelines before and after the valve to remove the oil, welding slag and all other impurities in the pipeline
3. Check the mark of the ball valve and find out the ball valve Intact. Fully open and close the valve several times to confirm that it is working properly.
4. Remove the protective parts on the flanges at both ends of the ball valve.
5. Check the valve hole to remove possible dirt, and then clean the valve hole. Even small foreign matter between the valve seat and the ball may damage the sealing surface of the valve seat. 1.
Install
the valve on the pipeline. Either end of the valve can be installed at the upstream end. The valve driven by the handle can be installed at any position on the pipeline. But the ball valve with gear box or pneumatic driver should be installed upright, that is, installed on the horizontal pipeline, and the driving device is above the pipeline.
2. The valve flange and pipeline flange should be fitted with a gasket according to the pipeline design requirements.
3. Flange The upper bolts need to be tightened symmetrically, successively and evenly.
4. Connect the pneumatic pipeline (when a pneumatic driver is used)
. Check after installation.
1. Operate the driver to open and close the ball valve several times. It should be flexible and free of stagnation to verify that it is working properly.
2. Press the tube Road design requires the sealing performance inspection of the flange joint surface between the pipeline and the ball valve
Preparation before installation of the ball valve
1. The pipeline is ready before and after the installation of the ball valve. The front and rear pipes should be coaxial, and the sealing surfaces of the two flanges should be parallel. The pipeline should be able to bear the weight of the ball valve, otherwise the pipeline must be equipped with appropriate supports.
2. Blow out the valves before and after the pipeline to remove oil, welding slag and other impurities in the pipeline.
3. Check the ball valve mark to ensure that the ball valve is intact. Open and close the valve several times to verify that it is working properly.
4. Remove the protection on the flange connecting the end of the ball valve.
5. Check the valve hole for dirt, and then clean the valve hole. Even if there are small foreign particles between the valve seat and the ball, it may damage the seat sealing surface
Ball valve installation
1. Connect the valve to the pipeline. Either end of the valve can be installed on the upstream end. The valve driven by the handle can be installed at any position on the pipeline. But the ball valve and the gear box or pneumatic actuator should be installed upright, that is, in the horizontal pipeline, the transmission device is located in the pipeline
2. The valve flange and the pipeline flange should be installed according to the pipeline design requirements. The sealing gasket
3. The bolts on the flange should be symmetrical, Continuous and uniform tightening
4. Connect pneumatic pipes (when using pneumatic drives)
Check the ball valve after installation
1. Operate the drive to open and close the ball valve several times. It should be flexibly and free to verify its normal operation.
2. According to the pipeline design requirements and the surface sealing performance of the ball valve joint
2. Maintenance of the ball valve
◆Before disassembling the ball valve, the maintenance of the ball valve must first make sure that the upper and lower pipes of the ball valve have been unloaded.
◆When disassembling and reassembling, attention must be paid to prevent damage to the sealing surface of the parts, especially non-metal parts, disassembly and reassembly The bolts on the flange must be tightened symmetrically, gradually 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 (gb484-489). Non-metal parts are cleaned with pure water or alcohol, and individual parts can be cleaned by immersion cleaning.
◆Metal parts containing undecomposed non-metal parts can be wiped with clean, fine and clean silk soaked in detergent (to prevent fibers from falling And adhere to the components)
◆Non-metal parts should be taken out of the cleaning agent immediately after cleaning, and should not be soaked for a long time.
◆All non-metal parts attached to the wall, such as grease, dirt, glue and dust, should be cleaned after cleaning. Remove from the cleaning agent immediately. Do not soak for a long time after cleaning. After cleaning, it should be volatile and cleaned (silk cleaning agent may not be used) for assembly, but do not use for a long time, otherwise it will rust and be contaminated by dust.
◆New parts should be assembled before assembly Clean and lubricate with grease. Grease should be compatible with ball valve metal materials, rubber parts, plastic parts and working medium.
◆Apply a thin layer of grease on the surface of the sealed installation groove, and apply a thin layer of grease on the rubber sealing ring. The sealing surface and friction surface of the valve stem are coated with a thin layer of grease components.It is
not allowed to have metal fragments, fibers, grease (except the use regulations), dust and other impurities, foreign matter and other pollutants, adhere or stay on Part surface or cavity