How To Maintain Flange Gasket Accessories In Valves
How to maintain flange gasket accessories in valves?
Valve accessories of gate valves, ball valves, butterfly valves, globe valves, check valves, etc are often more prone to damage than the valve itself, such as flange gaskets. Then, how to replace the damaged flange gaskets?
To replace the gasket of valve flanges, we should follow the following four basic principles: prepare the materials and tools and pay attention to the operation steps. It needs to meet the two technical requirements and five points.
Preparation work:
1. Materials: butter, cotton yarn, leak detector, sealing gasket
2. Tools: wrench, screws
Operation steps:
1. Remove the connection bolt of the flanges. Remove the valve or remove the pipe segment of the leakage end. Remove the old gasket from the sealing surface.
2. Choose a suitable gasket and evenly spread a layer of butter on both sides.
3. Place the gasket on the sealing surface between the two flanges. Align the center of the two flanges with the center of the bolt hole. Install the bolt. Then, tighten the nut, and evenly tighten the nut several times. The length of the bolt extending out of the nut should be 2 to 3 pitches. After the flange gasket is installed, the working pressure test should be carried out without leakage.
Technical requirements:
1. Operate carefully to prevent damage to the flange.
2. After the tool is finished, clean and maintain it.
Five points of gasket installation
1. Selection: The form, material and size of flanges, bolts and gaskets should be selected according to the operating conditions and the structural form of the flange surface.
2. Careful inspection: the quality of flanges, bolts, nuts and gaskets should be carefully checked before installation. There should be no burrs, bumps, cracks and other defects. Carefully check the installation of flanges and pipes, and it should not be offset, wrong mouth, wrong hole and other phenomena.
3. Cleaning: the sealing surface of the flange must be cleaned, and the bolts and gaskets are free from impurities and oil.
4. Correct installation: the gasket should be concentric with the pipe or pipe fitting.
5. Uniform: When installing bolts, the nut should apply uniform force and tighten it symmetrically many times.
Valve accessories of gate valves, ball valves, butterfly valves, globe valves, check valves, etc are often more prone to damage than the valve itself, such as flange gaskets. Then, how to replace the damaged flange gaskets?
To replace the gasket of valve flanges, we should follow the following four basic principles: prepare the materials and tools and pay attention to the operation steps. It needs to meet the two technical requirements and five points.
Preparation work:
1. Materials: butter, cotton yarn, leak detector, sealing gasket
2. Tools: wrench, screws
Operation steps:
1. Remove the connection bolt of the flanges. Remove the valve or remove the pipe segment of the leakage end. Remove the old gasket from the sealing surface.
2. Choose a suitable gasket and evenly spread a layer of butter on both sides.
3. Place the gasket on the sealing surface between the two flanges. Align the center of the two flanges with the center of the bolt hole. Install the bolt. Then, tighten the nut, and evenly tighten the nut several times. The length of the bolt extending out of the nut should be 2 to 3 pitches. After the flange gasket is installed, the working pressure test should be carried out without leakage.
Technical requirements:
1. Operate carefully to prevent damage to the flange.
2. After the tool is finished, clean and maintain it.
Five points of gasket installation
1. Selection: The form, material and size of flanges, bolts and gaskets should be selected according to the operating conditions and the structural form of the flange surface.
2. Careful inspection: the quality of flanges, bolts, nuts and gaskets should be carefully checked before installation. There should be no burrs, bumps, cracks and other defects. Carefully check the installation of flanges and pipes, and it should not be offset, wrong mouth, wrong hole and other phenomena.
3. Cleaning: the sealing surface of the flange must be cleaned, and the bolts and gaskets are free from impurities and oil.
4. Correct installation: the gasket should be concentric with the pipe or pipe fitting.
5. Uniform: When installing bolts, the nut should apply uniform force and tighten it symmetrically many times.
