Introduction to installation and maintenance of ball valves

Introduction to installation and maintenance of ball valves
1、 Confirm the preparation work for the ball valve before installation
1. Ensure that the installation position of the ball valve is on the same axis as the pipeline, and that the two flanges on the pipeline are parallel. Confirm that the pipeline can withstand the weight of the ball valve itself. If it is found that the pipeline cannot withstand the weight of the ball valve, provide corresponding support for the pipeline before installation.
2. Confirm whether there are impurities, welding slag, etc. inside the pipeline, and blow it clean.
3. Check the nameplate of the ball valve and perform multiple fully open and fully closed operations to confirm that the valve can work properly. Then, perform a one-stop inspection of all details of the valve to ensure that it is intact and undamaged.
4. Remove the protective covers at both ends of the valve, check if the valve body is clean, and clean the inner cavity of the valve body. As the sealing surface of the ball valve is spherical, even small debris may cause damage to the sealing surface.
2、 Installation of ball valve
1. Any section of the ball valve can be installed at the upstream end, and the handle ball valve can be installed at any position in the pipeline. If the ball valve is equipped with an actuator (such as a gearbox or an electric pneumatic actuator), it needs to be installed vertically, with the valve inlet and outlet in a horizontal position.
2. Install a sealing gasket between the ball valve flange and the pipeline flange according to the pipeline design requirements.
3. The bolts on the flange need to be tightened symmetrically, gradually, and evenly.
4. If the ball valve adopts pneumatic, electric or other actuators, complete the installation of the air source and power supply according to the instructions.
3、 Inspection after installation of ball valve
1. After installation, start the ball valve to open and close several times. The action should be flexible, the force should be uniform, and the ball valve should work normally.
2. According to the pressure design requirements of the pipeline, the sealing performance of the joint surface between the ball valve and the pipeline flange shall be tested after pressurization.
4、 Ball valve
1. Only by removing the pressure before and after the ball valve can the ball valve be disassembled.
2. During the reassembly process of ball valves, it is necessary to protect sealed components, especially non-metallic components such as O-rings, using specialized tools.
3. When reassembling the ball valve body, the bolts need to be tightened symmetrically, gradually, and evenly.
4. The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts, and working media (such as gas) in the ball valve. When the working medium is gas, gasoline (GB484-89) can be used to clean metal parts. Clean non-metallic parts with purified water.
5. The individual parts that come down can be cleaned by immersion washing. During cleaning, all grease, dirt, adhesive buildup, dust, and other substances adhering to the wall surface must be removed.
6. Non metallic parts should be immediately removed from the cleaning agent after cleaning and should not be soaked for a long time.
7. After cleaning, it is necessary to wait for the wall cleaning agent to evaporate (which can be wiped with a silk cloth that has not been soaked in cleaning agent) before assembly, but it should not be left for a long time, otherwise it will rust and be contaminated by dust.
8. New parts also need to be cleaned thoroughly before assembly.
9. Lubricate with grease. Lubricating grease should be compatible with the metal material, rubber parts, plastic parts, and working medium of the ball valve. When the working medium is gas, special 221 lubricating grease can be used, for example. Apply a thin layer of grease on the surface of the seal installation groove, a thin layer of grease on the rubber seal, and a thin layer of grease on the sealing and friction surfaces of the valve stem.
10. During assembly, metal debris, fibers, grease (excluding those specified for use), dust, and other impurities, foreign objects, etc. should not be allowed to contaminate, adhere, or remain on the surface of the parts or enter the internal cavity.
1、 Installation of ball valve
1. Any section of the ball valve can be installed at the upstream end, and the handle ball valve can be installed at any position in the pipeline. If the ball valve is equipped with an actuator (such as a gearbox or an electric pneumatic actuator), it needs to be installed vertically, with the valve inlet and outlet in a horizontal position.
2. Install a sealing gasket between the ball valve flange and the pipeline flange according to the pipeline design requirements.
3. The bolts on the flange need to be tightened symmetrically, gradually, and evenly.
4. If the ball valve adopts pneumatic, electric or other actuators, complete the installation of the air source and power supply according to the instructions.
3、 Inspection after installation of ball valve
1. After installation, start the ball valve to open and close several times. The action should be flexible, the force should be uniform, and the ball valve should work normally.
2. According to the pressure design requirements of the pipeline, the sealing performance of the joint surface between the ball valve and the pipeline flange shall be tested after pressurization.
4、 Ball valve
1. Only by removing the pressure before and after the ball valve can the ball valve be disassembled.
2. During the reassembly process of ball valves, it is necessary to protect sealed components, especially non-metallic components such as O-rings, using specialized tools.
3. When reassembling the ball valve body, the bolts need to be tightened symmetrically, gradually, and evenly.
4. The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts, and working media (such as gas) in the ball valve. When the working medium is gas, gasoline (GB484-89) can be used to clean metal parts. Clean non-metallic parts with purified water.
5. The individual parts that come down can be cleaned by immersion washing. During cleaning, all grease, dirt, adhesive buildup, dust, and other substances adhering to the wall surface must be removed.
6. Non metallic parts should be immediately removed from the cleaning agent after cleaning and should not be soaked for a long time.
7. After cleaning, it is necessary to wait for the wall cleaning agent to evaporate (which can be wiped with a silk cloth that has not been soaked in cleaning agent) before assembly, but it should not be left for a long time, otherwise it will rust and be contaminated by dust.
8. New parts also need to be cleaned thoroughly before assembly.
9. Lubricate with grease. Lubricating grease should be compatible with the metal material, rubber parts, plastic parts, and working medium of the ball valve. When the working medium is gas, special 221 lubricating grease can be used, for example. Apply a thin layer of grease on the surface of the seal installation groove, a thin layer of grease on the rubber seal, and a thin layer of grease on the sealing and friction surfaces of the valve stem.
10. During assembly, metal debris, fibers, grease (excluding those specified for use), dust, and other impurities, foreign objects, etc. should not be allowed to contaminate, adhere, or remain on the surface of the parts or enter the internal cavity.
Introduction to installation and maintenance of ball valves
1、 Confirm the preparation work for the ball valve before installation
1. Ensure that the installation position of the ball valve is on the same axis as the pipeline, and that the two flanges on the pipeline are parallel. Confirm that the pipeline can withstand the weight of the ball valve itself. If it is found that the pipeline cannot withstand the weight of the ball valve, provide corresponding support for the pipeline before installation.
2. Confirm whether there are impurities, welding slag, etc. inside the pipeline, and blow it clean.
3. Check the nameplate of the ball valve and perform multiple fully open and fully closed operations to confirm that the valve can work properly. Then, perform a one-stop inspection of all details of the valve to ensure that it is intact and undamaged.
4. Remove the protective covers at both ends of the valve, check if the valve body is clean, and clean the inner cavity of the valve body. As the sealing surface of the ball valve is spherical, even small debris may cause damage to the sealing surface.
2、 Installation of ball valve
1. Any section of the ball valve can be installed at the upstream end, and the handle ball valve can be installed at any position in the pipeline. If the ball valve is equipped with an actuator (such as a gearbox or an electric pneumatic actuator), it needs to be installed vertically, with the valve inlet and outlet in a horizontal position.
2. Install a sealing gasket between the ball valve flange and the pipeline flange according to the pipeline design requirements.
3. The bolts on the flange need to be tightened symmetrically, gradually, and evenly.
4. If the ball valve adopts pneumatic, electric or other actuators, complete the installation of the air source and power supply according to the instructions.
3、 Inspection after installation of ball valve
1. After installation, start the ball valve to open and close several times. The action should be flexible, the force should be uniform, and the ball valve should work normally.
2. According to the pressure design requirements of the pipeline, the sealing performance of the joint surface between the ball valve and the pipeline flange shall be tested after pressurization.
4、 Ball valve
1. Only by removing the pressure before and after the ball valve can the ball valve be disassembled.
2. During the reassembly process of ball valves, it is necessary to protect sealed components, especially non-metallic components such as O-rings, using specialized tools.
3. When reassembling the ball valve body, the bolts need to be tightened symmetrically, gradually, and evenly.
4. The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts, and working media (such as gas) in the ball valve. When the working medium is gas, gasoline (GB484-89) can be used to clean metal parts. Clean non-metallic parts with purified water.
5. The individual parts that come down can be cleaned by immersion washing. During cleaning, all grease, dirt, adhesive buildup, dust, and other substances adhering to the wall surface must be removed.
6. Non metallic parts should be immediately removed from the cleaning agent after cleaning and should not be soaked for a long time.
7. After cleaning, it is necessary to wait for the wall cleaning agent to evaporate (which can be wiped with a silk cloth that has not been soaked in cleaning agent) before assembly, but it should not be left for a long time, otherwise it will rust and be contaminated by dust.
8. New parts also need to be cleaned thoroughly before assembly.
9. Lubricate with grease. Lubricating grease should be compatible with the metal material, rubber parts, plastic parts, and working medium of the ball valve. When the working medium is gas, special 221 lubricating grease can be used, for example. Apply a thin layer of grease on the surface of the seal installation groove, a thin layer of grease on the rubber seal, and a thin layer of grease on the sealing and friction surfaces of the valve stem.
10. During assembly, metal debris, fibers, grease (excluding those specified for use), dust, and other impurities, foreign objects, etc. should not be allowed to contaminate, adhere, or remain on the surface of the parts or enter the internal cavity.