The internal thread ball valve is a relatively new type of ball valve. It has some characteristics of its own structure, such as no friction on the switch, no wear on the seal, and small opening and closing torque. This will reduce the size of the actuator. Equipped with multi rotation electric actuator, the medium can be adjusted and cut off tightly. It is widely used in petrochemical city water supply and drainage and other working conditions requiring strict cut-off.
Preventive measures for internal leakage of the branch valve of medium pressure high pressure ball valve
The preventive measures for internal leakage of the valve are introduced below.
The transportation, installation, commissioning and operation and maintenance of valves may be the root cause of internal leakage of valves, so the preventive measures also run through the whole process.
1. Acceptance of new valves: during the valve acceptance process, it is important to check whether the spherical surface and valve seat are intact without scratches, and whether the soft seal is well sealed. At the same time, we check the auxiliary configuration, such as whether the grease nozzle and the internal check valve are in good condition. The grease nozzle and the internal check valve are the way to "contact" the inside and outside of the valve, and their integrity ensures that the grease injection channel is unblocked.
2. Protection and cleaning before installation: temporary protection shall be provided on both sides of the valve during pipeline installation to prevent rainwater, dust, silt, sundries, etc. from entering and affecting the sealing of the valve; During valve installation, keep the pipeline clean, control the sealing state of the valve, ensure that there is no foreign matter inside, effectively protect the valve seals, and reduce seal damage. These requirements and measures are the key to avoid internal leakage of the valve in the future.
3. Correct operation and maintenance: operate in strict accordance with the valve operation specifications. It is strictly prohibited to operate by more than one person, the booster bar operation, and the brute force operation. Pay more attention to the valve abnormalities, and find out the causes and take corresponding measures.
4. Regular maintenance: for the management and maintenance of operating valves, it is important that the preventive and maintenance measures should be in place in time. The valves should be inspected and maintained regularly. When internal leakage is found in the valves, the valves should be inspected and repaired immediately to prevent further expansion of internal leakage.
The electric ball valve is mainly composed of an electric actuator and a ball valve. The plug body is a ball, which can rotate 90 degrees. The electric ball valve is not only a good product for throttling, cut-off, cut-off, on-off, and flow conversion, but also a product in the flow regulation system. It has many characteristics, such as pressure resistance, temperature resistance, corrosion resistance, small flow resistance, long service life, and wide application range;
The electric ball valve is mainly operated by regulating the electric flow in the electric actuator. The input and output signals of the electric actuator are 4-20mA and 220VAC power supply standard signals. The motor unit drives the angular torque of the gear worm to control the opening and closing of the ball valve, distribute and change the flow direction of the medium or adjust the proportional degree of the rotation of the valve core, that is, the valve opening is proportional to the control fluid, or the percentage.
