Ball Valve With The Use Of Throttle And Control Flow
Dec 13, 2017
Ball valve works: the ball valve is evolved from the plug valve. It has the same rotation of 90 degrees, except that the ball valve is a sphere with a circular through hole or passage through its axis. The ratio of the spherical and the channel should be the same, that is, when the ball rotates 90 degrees, the entrance and exit should all appear spherical, thus cutting off the flow. The ball valve only need to rotate 90 degrees of operation and a small turning torque can be closed tight. The fully equal body cavity provides a very small, straight passage for the medium.
Ball valve is a pipe used to cut off, the distribution of changes in the direction of the media to change the device, in use only need to rotate 90 degrees of operation and a small torque can be closed tight. In the use of ball valve need to pay attention to what? Today, mainly to introduce the use of ball valve precautions, hoping to help everyone.
1. must first identify the ball valve, the downstream pipeline has been unloading pressure, in order to disassemble the decomposition operation.
2. non-metallic parts should be immediately removed from the cleaning agent, not a long time soaking.
3. the assembly of the flange on the flange must be symmetrical, step by step, even tighten.
4. cleaning agents should be with the ball in the rubber parts, plastic parts, metal parts and working medium (such as gas) are compatible. When the working medium is a gas, the metal parts can be cleaned with gasoline (GB484-89). Non-metallic parts are washed with pure water or alcohol.
5. the decomposition of each single ball valve parts can be washed with immersion method. Metal parts that are left with undecomposed non-metallic parts can be scrubbed with a clean, fine, dipped silk cloth (to prevent fiber from falling off on the part). Cleaning to remove all adhere to the wall of the grease, dirt, plastic, dust and so on.
6. ball valve decomposition and re-assembly must be careful to prevent damage to the sealing surface parts, especially non-metallic parts, remove the O-ring should use special tools.
7. after cleaning to be washed wall cleaning agent after evaporation (can be used to clean the cloth cleaning cloth), but not for a long time to shelve, otherwise it will rust, dust pollution.
8. the new parts need to be cleaned before assembly.
9. use grease lubrication. Grease should be compatible with ball valve metal material, rubber parts, plastic parts and working medium. When the working medium is gas, for example, special gas is 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, apply a thin layer of grease to the sealing surface and friction surface of the valve stem.
10. the assembly should not allow metal debris, fiber, grease (except for the provisions of the use of) dust and other impurities, foreign body pollution, adhesion or stay in the surface of the parts or into the cavity.