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  • Advantages of V-port Valves
    Advantages of V-port Valves Sep 18, 2020
    The V-ball valves or V-port ball valves are similar to traditional ball in which there is a V-notch on a ball-shaped disc to control flow by a rotating quarter-turn motion. The “V-port" is a particular design that bring about precise flow and the ability to regulate and control flow by V balls of  different degrees. These special valves are used in a wide range of chemical applications, including the most challenging services with many advantages.   Flow Modulating The accuracy of V-ball valves provides equal percentage flow characteristics. As the ball rotates, desired flow rates can be achieved by positioning the ball anywhere between 0° and 90°.   Bubble tight shutoff V-ball valves have the ability to close tightly. Therefore, no other shutoff valves is required when using a V-ball valve on a globe valve.   Lower pressure drop V-ball valves also have a higher coefficient of flow (Cv) than the same size globe valve, which directs the flow and uses a plug to control the flow through the valve. This means that the flow rate achieved by one shut-off valve can be achieved with a smaller V-ball size.   Higher shutoff pressure. A 90°rotation of the ball allows the V-ball to close at a higher operating pressure. This therefore allows the use of lower torque actuators, resulting in cost savings and increased efficiency for the end user.
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  • Know and Know More About Changeover Valve
    Know and Know More About Changeover Valve Sep 11, 2020
    There are quite a few types of changeover valves, and according to different standards, there are different subdivisions. But in general, it is mainly four kinds, for motorized changeover valve, manual changeover valve, solenoid valve and electro-hydraulic changeover valve.   1. What is a changeover valve?   Changeover valve, from a professional point of view, is a kind of direction-change valve. It is mainly used to achieve the flow of hydraulic oil, cut off the machine changeover operations, pressure relieving, as well as sequential action control, so its use is very wide.   2. The working principle of reversing valve   The changeover valve uses a  driving mechanism outside the valve to rotate the drive shaft, and then activates the valve plate, etc. So that the fluid can flow into the outlet of the lower part of the valve, and can be changed from time to time to achieve the purpose of periodically changing the flow direction.   3. Changeover valve classification  (1) Motorized changeover valve, it is also known as a stroke valve.    (2) Electromagnetic changeover valve, electromagnetic changeover valve is the use of electromagnetic attraction to manipulate the spool changeover control valve.    (3) Electro-hydraulic changeover valve, electro-hydraulic changeover valve is a composite valve composed of solenoid valve and hydraulic changeover valve.    (4) Manual changeover valve, manual changeover valve is a changeover control valve with a manual lever to manipulate the spool shift direction-changing valve.  
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  • How to extend the service life of lined valves?
    How to extend the service life of lined valves? Sep 01, 2020
    Among the anti-corrosion materials, PTFE has incomparable excellent performance. In addition to outstanding chemical stability, it also has satisfactory anti-fouling and anti-stickiness, small dynamic and static friction coefficient, good anti-wear performance. Using it as a valve opening and closing the sealing material, the friction between the sealing surface and required operating torque will be reduced, hence product life increases. the application scope can also be extended to the food, pharmaceutical industry and so on. Fluorine lined valves, also known as anti-corrosion valves, are usually found in harsh working conditions. The media is either toxic and harmful chemicals, or pretty corrosive acids and bases or organic solvents. That means improper use and operation will elicit significant economic losses and serious consequences. Applicable media: various concentrations of acid and alkali salt and certain organic solvents. Fluorine is extolled as the world's most ideal anti-corrosion materials, has been widely used in the rotational molding of large equipment and piping lining. Correct use and maintenance of the valve can extend the service life of fluorine lined valves, then what can be done to effectively protect it? 1. Carefully read the instruction manual before use. 2. Use it within the range of pressure, temperature and media given by the nameplate or instruction. 3. To prevent fluorine lined valves from excessive piping stresses due to temperature changes, temperature changes should be minimized and U-shaped expansion joints should be added before and after the valve. 4. For some unstable and easily decomposed media (such media will expand after decomposition,  resulting in an abnormal pressure rise) and media that can cause valve damage or leakage, measures should be taken to eliminate or limit the factors that cause the decomposition of unstable media. 5. For fluorine lined valves in pipelines of toxic, flammable, explosive, highly corrosive media, it is strictly prohibited to replace the packing under pressure. Even the valves are designed with sealing part, it is not recommended to replace the packing under pressure either. 6. For pipelines with self-combustible media, measures should be taken to ensure that the ambient and working temperatures do not exceed the self-combustibility point of the media to avoid the danger from sunlight or external fires.
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  • What 3 parts of Triple offset butterfly valve are offset?
    What 3 parts of Triple offset butterfly valve are offset? Aug 07, 2020
    The sealing performance of traditional hard seal butterfly valve is not so satisfying, because the leakage of the valve is hard to avoid. In order to change this situation, after several upgrades of hard seal butterfly valve, the triple eccentric butterfly valve arrives.   The characteristic of the triple eccentric butterfly valve is that the high-temperature and corrosion resistant alloy material is welded to the seat sealing surface layer, and the multi-layer soft stacked seal ring is fixed on the butterfly plate. Such a process makes the triple eccentric butterfly valve more resistant to high temperature and high pressure environment and more corrosion-resistant than the traditional butterfly valve products.   To be specific,  the benefits of the triple eccentric structure of the hard seal butterfly valve are--   The design of the triple eccentric type is so unique that the metal hard seal begins to save more effort. When the valve is open or closed, there is no friction between the butterfly plate and the valve body while rotating. When the valve is closed, the increasing torque of the transmission mechanism can provide a compensating seal, greatly improving the sealing performance of the triple eccentric butterfly valve. At the same time, the service life of the butterfly valve increases.   What 3 parts of Triple offset butterfly valve are offset?   The first eccentric part is that the spindle which is located behind the spindle of the valve plate, allowing the seal to completely and tightly surround the entire valve seat.   The second eccentric part is that the centerline of the valve shaft deviates from the centerline of the pipe and the valve. This construct prevents interference from valve opening and closing.   The third eccentric is that the valve seat cone axis deviates from the center line of the valve shaft, so as to eliminate friction in the closing and opening process, and to achieve a uniform and consistent compression seal around the entire valve seat.   The above is an introduction to the three eccentric butterfly valve, three eccentric butterfly valve is a high-performance butterfly valve, currently used in many fields. And even in some areas, triple offset butterfly valve has took the place of the gate valve, globe valve, ball valve and other products.  
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  • When should you use a three-piece ball valve
    When should you use a three-piece ball valve Aug 07, 2020
    The options for ball valves seem endless. In order to choose the right ball valve, you have to decide which seat material? What kind of terminal connection? Full, Reduced or Standard Port? 2-way or multi-port type? the packaging?   In this article, we will discuss when you should use a three-piece ball valve.   What is a 3-piece ball valve?   Ball valves fall in one-piece, two-piece or three-piece. One-piece ball valves are relatively cheap and usually require no maintenance. A two-piece ball valve consists of two separate parts that are connected by a threaded or bolted and flanged assembly.   According to this law, you may have guessed that a three-piece ball valve consists of three pieces. Yes, there are two end caps and a valve body. The end caps are either welded, threaded or flanged to the piping on either side of the valve.   Why use a three-piece ball valve?   For projects with a large number of valve requirements, three-piece ball valves are more convenient than one-piece or two-piece ones. When seats and seals need to be replaced periodically, three-piece valves can be easily disassembled, repaired and reassembled without major cuts to the piping.   Three-piece ball valves also allow replacement of elastomers to accommodate different process conditions, temperatures, pressures and flow rates.   Do you need to weld the valve in the field? Another benefit of a 3 piece ball valve is the fact that it can remove the valve body and trims while welding. Because that, the body and trims can be kept intact.   What is the biggest difference between a 2 and 3 piece ball valve?   The two-piece ball valve was also designed in the view of easy maintenance. The major difference between the two is that the valve body on a three-piece valve can be removed without disturbing the two end caps. Two-piece ball valves usually do not allow this, let alone one-piece ball valves.   There are, of course, price differences. As mentioned earlier, one-piece valves are usually disposable. Three-piece valves tend to cost more initially, but in the long run, maintenance costs and the ability to replace the seat and seals should be kept in mind rather than replacing the valve.
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  • Better properties of ball valves over butterfly valves
    Better properties of ball valves over butterfly valves Jul 23, 2020
    Ball valves and butterfly valves are the two most common types of rotary valves. It only need a quarter-turn to turn on or turn off both valves. However, there are certain functions where a ball valve is better than a butterfly valve.   First of all, ball valve provides a perfect seal. When the valve is completely closed, there will be no leakage. More importantly, the ball valve can rotate regardless of the pressure from the supply line. What’s more, as long as it is fully open, it will not reduce the pressure of the fluid in the pipeline.   Ball valves are primarily used to control high-pressure liquid and gas lines. This is because ball valves do not cause any pressure drop or impede fluid movement when fully open. What is worthy to be noted that they are primarily used in applications where the inside diameter of the pipe is less than or equal to 6 inches.   Ball valves have no trouble in high-pressure applications. In addition, when ball valves are used in high-pressure applications, a pressure balancing scheme is not required. This is not possible with butterfly valves.   Ball valves have a simple structure. They are also smaller and lighter compared to many other types of valves. Ball valves have a very flexible soft seal, which makes it easy to operate. And ball valves have the lowest fluid resistance compared to all other types of valves.   You can use the valve for many years without any damage due to leakage. In other words, this means that the valve is reliable and cost effective in the long term. This valve can be designed to withstand extremely high pressures. In fact, you will recognize that high-pressure systems often have ball valves fitted internally.   There can be multiple ends in a ball valve. It allows many combinations of ports. If you are thinking of purchasing a ball valve, you can consider these advantages before your purchase.
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