Advantages of high-platform ball valve 

 1. Convenient installation: The high-platform ball valve adopts a new ISO5211 platform structure. There is a platform on the valve stem, which can directly install the actuator without a bracket, which is easy to install and disassemble. When installing the actuator of the ordinary ball valve, it is necessary to install a bracket first, and the valve fastening bolt should be lengthened, which is not only troublesome but also expensive. 

 2. Appearance and process: The high-platform ball valve adopts the silicone sol casting process, and the appearance of the product is better than that of the ball valve manufactured by ordinary process. 

 3. Superior structure 

 • Opening and closing without friction: It solves the problem that traditional valves affect the sealing due to the friction between the sealing surfaces. 

 • Top-mounted structure: the valves installed on the pipeline can be directly inspected and repaired online, which can effectively reduce the parking of the device and reduce the cost. 

 • Single seat design: eliminates the problem that the cavity medium in the valve affects the safety of use due to abnormal pressure rise. 

 • Low torque design: The valve stem with special structure design can be easily opened and closed with a small handle valve. 

 • Wedge-shaped sealing structure: The valve is sealed by the mechanical force provided by the stem to press the ball wedge on the valve seat, so that the sealing of the valve is not affected by the change of the pressure difference of the pipeline, and the sealing performance is reliably guaranteed under various working conditions. 

 • Self-cleaning structure of the sealing surface: When the ball is tilted off the valve seat, the fluid in the pipeline passes 360° uniformly along the sealing surface of the ball, which not only eliminates the local erosion of the high-speed fluid on the valve seat, but also washes away the accumulation on the sealing surface to achieve the purpose of self-cleaning. 

 4. Excellent performance 

 • Small fluid resistance: its resistance coefficient is equal to that of the tube section of the same length. 

 • Simple structure, small size and light weight. 

 • Tight and reliable: The sealing surface material of the ball valve is widely used in plastic, with good sealing, and has been widely used in vacuum systems. 

 • Easy to operate: quick opening and closing, from full opening to full closing only need to rotate 90°, which is convenient for long-distance control. 

 • Convenient maintenance: the structure of the ball valve is simple, the sealing ring is generally active, and it is convenient to disassemble and replace. 

 • Wide range of application: diameter from small to a few millimeters, large to a few meters, from high vacuum to high pressure can be applied. 

 5. Strong corrosion resistance: give priority to the selection of highly corrosive materials in the production process to ensure that the high-platform ball valve has acid and alkali resistance. 

 6. High precision: The internal structure design has been optimized to avoid dripping during use. 

 7. The price is relatively low: the technical content is relatively high, but due to the development of China's ball valve production technology, the price is relatively cheap. 

 Daily maintenance methods of high-platform ball valves 

 1. Preparation before operation: It is necessary to find out that the upper and lower pipes of the ball valve have indeed removed the pressure before the disassembly and decomposition operation can be carried out. 

 2. Disassembly and assembly 

 • When decomposing and reassembly, you must be careful to prevent damage to the sealing surface of parts, especially non-metallic parts. Special tools should be used when removing the O-ring. 

 • The bolts on the ball valve flange must be tightened symmetrically, gradually and evenly during assembly. 

 • The non-metallic parts of the ball valve should be removed from the cleaning agent immediately after cleaning and should not be soaked for a long time. 

 • After cleaning, it needs to be assembled after the washed wall cleaning agent evaporates (it can be wiped with a silk cloth without immersion cleaning agent), but it should not be left for a long time, otherwise it will rust and be contaminated by dust. 

 • When the ball valve is assembled, metal debris, fibers, grease (except for the prescribed use), dust and other impurities, foreign matter and other pollution, adhesion or stay on the surface of the part or into the inner cavity shall not be allowed. 

 3. Lubrication treatment: Use grease to lubricate. The grease should be compatible with the ball valve metal materials, rubber parts, plastic parts and working media. When the working medium is gas, for example, special 221 grease can be used. Apply a thin layer of grease to the surface of the seal installation groove, apply a thin layer of grease to the rubber seal, and apply a thin layer of grease to the sealing surface and friction surface of the valve stem. 

 4. Regular inspection and maintenance 

 1 Valve seal inspection 

 • External leakage inspection: For the stem sealing part of the valve, check whether there is medium seepage. A small amount of leak detection liquid (such as soapy water) can be applied around the stem to see if there are bubbles. If there is a bubble, it means that there is a leak in the stem seal. It is necessary to further check whether the sealing filler or seal is damaged or aging. It may be necessary to replace the filler or seal to solve the leakage problem. Check whether there is any leakage at the flange connection of the valve. You can also use the leak detector to observe whether there are bubbles on the edge of the flange. For flanges with trace leaks, it may be necessary to re-tighten the bolts or replace the gasket to repair the leak. In the case of serious leakage, it is necessary to close the upstream and downstream valves, empty the medium in the pipeline, and then repair it. 

 • Internal leakage inspection: According to the type of valve and the working medium, different methods are used to check the internal leakage. For ball valves and butterfly valves, the internal leakage situation can be preliminarily judged by checking whether the position indicator after the valve is closed is accurate. 

 2 Valve operation performance check 

 • Manual valve operation inspection: operate the manual valve regularly to check whether the opening and closing of the valve is flexible. When opening and closing the valve, pay attention to whether the operating force is uniform, whether there is jam or abnormal resistance. If the operation is difficult, it may be caused by excessive friction between the stem and the filler, foreign matter stuck in the valve body, or damaged valve parts. Check whether the opening indication of the valve is accurate. For valves with openness indicators, such as regulating valves, when operating the valve, observe whether the reading of the opening indicator is consistent with the actual opening. Inaccurate openness indication may affect the flow control of the system, and the indicator needs to be calibrated or repaired. For frequently operated manual valves, pay attention to the wear of the handwheel or handle. Excessive worn operating parts may affect the feel of the operator and even cause the operation to get out of control. The severely worn handwheel or handle should be replaced in time to ensure the safety and accuracy of valve operation. 

 • Electric valve operation inspection: check whether the power connection of the electric valve is normal, and whether the wire is damaged, aging or loose. To ensure that the control signal of the electric actuator is transmitted normally, the operating control system can be used to check whether the valve can be opened, closed or adjusted accurately according to the instructions. Observe the operation of the electric valve during operation, such as whether the opening and closing speed of the valve meets the requirements, and whether there is abnormal vibration or noise. Abnormal vibration or noise may be caused by damage to the internal parts of the electric actuator, mechanical structural failure of the valve or improper installation. Further inspection and maintenance of electric valves are required, including checking the working status of motors, reducers, couplings and other components. Regularly check and adjust the travel limit switch of the electric valve. The travel limit switch is an important device to control the opening and closing position of the valve. If the limit switch fails, it may cause the valve to open or close excessively and damage the valve or electric actuator. By simulating the full-open and full-off action of the valve, check whether the limit switch can accurately cut off the motor power supply to ensure the operation safety of the valve. 

 3 Lubrication and maintenance 

 • Lubrication point inspection: determine the lubrication point of the valve, generally including the valve stem, bearings, gears and other parts. For different types of valves, the position and number of lubrication points may vary. For example, the main lubrication point of the gate valve is the contact between the stem and the gate plate and the guide rail; the ball valve needs to lubricate the contact part between the ball and the valve seat and the stem. Check whether there is enough lubricant at the lubrication point. If the lubricant is insufficient, it may increase the friction between the parts and affect the operating performance and service life of the valve. For some valves with grease injection ports, you can judge whether the lubricant at the lubrication point is sufficient by observing the grease injection port or checking the liquid level of the grease. 

 • Select the right lubricant: Select the right lubricant according to the working environment of the valve and the component material. In general room temperature and pressure environment, lithium grease is a commonly used lubricant, which has good lubrication performance and anti-wear performance. For chemically corrosive working environments, such as valves in the chemical industry, lubricants with corrosion resistance should be selected. For example, fluorine grease can resist the corrosion of strong acids, strong alkalis and other chemicals, and provide effective lubrication and protection for valves. At the same time, the compatibility between the lubricant and the valve seal and other component materials should be considered to avoid damage to the components due to the chemical properties of the lubricant. 

 • Lubrication operation: For valves that need to be lubricated, lubricate according to the correct method and cycle. For manual valves, you can use a grease gun or oil can to inject lubricant into the lubrication point. When injecting lubricant, pay attention to avoid excessive injection, so as not to spill the lubricant to pollute the surrounding environment or affect the normal operation of the valve. For electric valves, some electric actuators have their own lubrication system, which requires regular inspection and replenishment of lubricant; for electric valves that do not have their own lubrication system, their external lubrication points should be manually lubricated. After the lubrication is completed, operate the valve several times so that the lubricant can be evenly distributed on the surface of the part and give full play to the lubrication role. 

 4 Valve attachment inspection 

 • Filter check: If there is a filter installed upstream of the valve, check regularly whether the filter is blocked. Filter blockage will lead to a decrease in fluid flow and an increase in pressure loss, affecting the normal operation of the valve. You can judge whether it is blocked by observing the pressure difference between the two ends of the filter. When the pressure difference exceeds a certain limit, the filter needs to be cleaned or the filter element needs to be replaced. When cleaning the filter, follow the correct operating procedures to avoid damaging the filter or other parts of the filter. For some sophisticated filters, it may be necessary to use special cleaning equipment and cleaning agents. 

 • Pressure gauge and safety valve inspection: Check whether the pressure gauge near the valve is working properly. Observe whether the pointer of the pressure gauge can accurately indicate the pressure and whether the dial is clear and readable. If the pointer of the pressure gauge jumps, does not return to zero or the indication is inaccurate, it may be that the internal parts of the pressure gauge are damaged or the pressure sensor is faulty, and the pressure gauge needs to be calibrated or replaced. For systems equipped with safety valves, it is necessary to regularly check whether the safety valves are in normal condition. Check whether the opening pressure of the safety valve meets the requirements and whether it can be opened accurately under the set pressure to release excess pressure. The performance of the safety valve can be checked by manual testing or professional test equipment.