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API recommends that only experienced, skilled personnel be allowed to install and maintain the API “BV” style butterfly valves and valve extensions. Lined pipe, heavy wall pipe, or flanges must have a minimum allowable inside diameter at the center body face to clear the disc sealing edge when opening the valve. If obvious external damage to the shipping container or package is evident upon receipt of the product, please request a representative of the shipping carrier be present prior to unpacking the product. API recommends keeping the shipping container and all packing material for reuse in storage or reshipment. If damage is observed, immediately file a claim with the shipping carrier. Butterfly valves that are damaged during transportation are the responsibility of the customer. The discs should remain in the nearly closed position to protect the sealing edge and to prevent distortion of the resilient seat. No other maintenance during storage or use is required. The pipeline should also be checked for proper alignment. API butterfly valves should never be utilized to realign an existing piping system. If a choice of stem position exists, the valve should be installed with the stem in the horizontal position; this will minimize seat wear by distributing the stem and disc weight evenly. Also, if the media is abrasive, the horizontal stem position creates a self-flushing effect that will extend the service life-expectancy of the valve. If pipeline strain is a concern with larger valves (due to weight), additional support may be necessary. Disc should be aligned parallel to the ends. For gear operated valve, adjust hex nuts on side of gearbox. Fully open and close disc several times to assure proper operation. If re-alignment is necessary, repeat. http://apartmaji-zunicmile.com/uporabnik/file/creative-playthings-swing-set-assembly-manual.xml

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Note that “wafer” style valves are placed between flanges and installed with fully threaded studs, whereas tapped “lug” style valves are installed between flanges with small cap screws on the inlet and the outlet of the valve. Note that accurate centering between upstream and downstream pipe ends is essential for trouble-free operation of the valves. Note that disc interference may result when valves are installed in pipelines having smaller than normal inside diameters, such as heavy wall pipe, plastic-lined pipe, as-cast flanges or reducing flanges. Interference can also occur when connecting directly to a swing check or silent check. Suitable corrective measures must be taken to remove these obstructions, such as taper boring the pipe, or installing a spacer or spool piece. If leakage is observed, tighten bolts using cross-over pattern, increasing torque until leak stops. Note that recommended torques are made without warranty. Installer must verify proper strength bolts for applications. Bolts should be clean and un-lubricated. Loosening piping bolts under line pressure is dangerous and can cause damage to the valve. Any residual fluid left inside the pipeline must be completely drained. For severe applications, slowly apply grease through fitting until excess can be seen between the shaft and Teflon seat. If Teflon bushing begins to “blow” out, relieve excess pressure by removing grease fitting. Once pressure is relieved, push Teflon bushing back into valve, and re-install grease fitting. There is sufficient grease in the gear box for standard applications, however for severe applications, fill with lithium based grease either by removing top plate, or using grease fitting. These items are stocked in one of our conveniently located warehouses for quick distribution throughout the United States. They were developed, designed and manufactured for installation in pipelines for shutting off a flow of liquid. http://cskconsultingengineers.com/fckeditor/editor/filemanager/connectors/php/userfiles/creative-playthings-manuals.xml

Suitable flow media include water, steam, petroleum, food, liquids in the chemical and pharmaceutical industry and pasty media. AWH butterfly valves represent maximum quality, reliability and hygiene. The butterfly valves are supplemented with a comprehensive range of accessories, and therefore offer the ideal solution for every application. In addition to a range of manual operations, the valves can easily be equipped with pneumatic or electric drives. A wide range of initiators and control heads are available to monitor performance. A clear advantage of AWH butterfly valves are the bearing bushes which minimise the wear on the axle, making our valves very durable. The semi-finished products we use are sourced from Western European stainless steel forges and have material certificates. The butterfly valves are manufactured exclusively in our headquarters in Hotensleben. They are subject to a continuous quality control process, which allows us to guarantee constant and consistently high quality. If you have questions on our product range, the AWH team will be happy to provide you with help and advice.We make use of this standard of technology and now implement RFID transponders in our butterfly valves. Read all relevant data directly on the valve. A special in-metal transponder stores all relevant data on the valve. The information can be updated or overwritten up to 10,000 times. You can save inspection intervals, item numbers, type of sealing, order numbers and further data in the memory. The transponder can be retrofitted, is water proof and immediately ready for use. Each transponder is unique as it has an ID number that cannot be overwritten. This means that the chip and valve can be assigned again and again. This type of monitoring gives them increased security in dealing with their systems and processes. http://fscl.ru/content/electronic-devices-and-circuit-theory-11th-solution-manual

There are particularly robust devices with easy-to-read displays for reading and writing transponders, especially for applications in plants and production facilities. All data can be transferred from the mobile device to your system via bluetooth, for example. The valve mechanism requires a 90-degree turn to go from the fully open to the fully closed position. The basic butterfly valve has three primary components: A disc, a stem, and a seat. The disc is a thin, typically circular, metal plate that opens or closes the valve. When the valve is opened, the disc is aligned parallel to the fluid flow, allowing unrestricted flow. When the valve is shut, the disc is perpendicular to the fluid movement, using its surface area to prevent flow through the pipe. The stem is a shaft that transmits motion from the handle or actuator to the disc. In some applications, the stem may be combined with the handle or disc as a single component. The valve seat seals the gap between the pipe flange and the valve disc to provide shut-off. The performance of butterfly valves is heavily dependent on the quality of the seat construction and its ability to seal. Butterfly Valve Installation There are several types of end connections that allow for easy installation of these valves, but the most common are lug and wafer style, both fitting between flanges. Lug style butterfly valves are similar to 3-piece ball valves -they allow adjacent piping to be removed independently. This is achieved by using two different set of bolts, with each attaching the pipe flanges at either end of the valve body. With this connection to the valve, the ends of the pipe sections can be removed and replaced independently. Installation is also fool-proof as the number of lugs make centering the valves easy. Wafer valves, in contrast to lug style, use only one set of bolts to align the valve and the connecting pipelines. This allows the valve to be installed faster for an experienced installer. http://instalaciones-martinez.com/images/canon-speedlite-430ex-manual-free-download.pdf

They can be more difficult to get centered for the less experienced and the larger valves are more cumbersome to install. Taking the valve out of line is also simpler than a lug style. Butterfly Valves Available at BI-TORQ At BI-TORQ Valve Automation, we offer a variety of butterfly valves with pneumatic or electric actuators for a diverse range of applications. We also offer metric (DN) flanged butterfly valves for systems that are made in Europe. Our factory-trained team assembles and tests all our units, so you can get a product that is ready for your project right away. We also have automated valve packages that we can customize to work with almost any application. Contact Us for Your Project If you would like to learn more about how BI-TORQ Valve Automation’s butterfly valve solutions can be used in your application, contact us or request a quote today. We do this to analyze and improve the website and to ensure that you receive relevant information and promotions. By using the website you agree to the use of cookies. The “butterfly” is a disk connected to a rod. It closes when the rod rotates the disc by a quarter turn to a position perpendicular to the flow direction (right image in Figure 1). When the valve opens, the disk is rotated back to allow the flow (left image in Figure 1). These valves can be operated by handles, gears or automatic actuators. The main components of a butterfly valve are the body, seal, disc and stem (Figure 2). A typical butterfly valve has the disc positioned in the center of the connected pipe and a stem that is connected to an actuator or handle on the outside of the valve. In the closed position, the disc is perpendicular to the flow, as shown in Figure 2, and is sealed by the valve seat. The stem is also sealed by the use of an o-ring. When the actuator or handle rotates the stem back 90 degrees, the disc moves away from the valve seat and positions itself parallel to the flow.

Partial rotation allows for the flow to be throttled or proportional. This results in a logarithmic relationship between disc travel and flow rate. Advances in butterfly valve design has made the equal percentage characteristic possible for angles of opening from 20 to 90 degrees. Butterfly valves can be categorised based on their disc closure design, connection design, and actuation method. This means that the stem passes through the centerline of the disc which is in the center of the pipe bore and the seat is the inside diameter periphery of the valve body (Figure 3 on the left). This zero-offset valve design is also called resilient-seated because it relies on the flexibility of the seat rubber to efficiently seal the flow when closed. Concentric butterfly valves are commonly used for low pressure ranges. When the stem is located right behind the centerline of the disc, the valve is called single-offset. This design was developed to reduce the disc contact with the seal before full closure of the valve with the aim of improving service life of the valve. Today, single-offset valves have given way to double offset and triple offset butterfly valves. This double eccentricity of the stem enables the rotating disc to rub over the seat for only about one to three degrees. The third offset is the disc-seat contact axis. The seat surface takes a conical shape which coupled with the same shape at the ridge of the disc, results in minimal contact before full closure of the valve. A triple offset butterfly valve is more efficient and allows for less wear. Triple offset valves are often made of metal seats to create a bubble-tight shut-off. The metal seats allow butterfly valves to be used in higher temperature ranges. These butterfly valves have higher pressure ratings and are prone to less wear. The most common methods are wafer type or lug type. However, they can also utilize a flange or a tri-clamp connection. aokman-gearbox.com/d/files/dsc-keypad-pk5500-manual.pdf

This valve may or may not have flange holes outside of the valve body as seen in Figure 5. The pipe flanges are connected through long bolts that cross the entire valve body, as seen in Figure 6. The sealing between the valve and pipe flanges is accomplished via gaskets, O-rings, and flat valve faces on both sides of the valve. This type of connection is designed for sealing against bi-directional differential pressures and to prevent backflow in systems designed for universal flow. Two sets of bolts connect pipe flanges to each side of the bolt inserts without nuts. This design enables the disconnection of one side without affecting the other for dead-end service. Lug-style butterfly valves used in dead end service generally have a lower pressure rating. The lug-style butterfly valves, unlike the wafer-style, carry the weight of the piping through the valve body. Wafter-style butterfly valve installation These devices allow precise rotation of the disc to positions ranging from fully open to fully closed. A brief understanding of the different types of actuation methods are below. The two common methods are a discussed below: An example can be seen in Figure 3 on the left. Gear operated valves are also self-locking (cannot be back driven) and can be equipped with position indicators. An example can be seen in Figure 3 on the right. These actuators also make rapid operation of larger valves possible. Actuators can be designed to fail-open (stay open in case of actuator failure) fail-close (stay closed in case of actuator failure) and often come with a manual actuation method in case of failure (as seen in Figure 7). The three types of automatic actuators are listed below, but more a more thorough understanding read our actuator article. These valves are available in very large sizes and are suitable for handling slurries, and liquids with relatively large amounts of solids at low pressures. {-Variable.fc_1_url-

However, due to the disc in butterfly valves, they cannot be pigged for cleaning purposes. Ball valves are advantageous for high pressure small diameter applications as they are better suited for higher differential pressures and cause very small pressure drop over the system. For small pipe diameters, the torque and material use of ball valves is relatively low. Typically, the torque and cost advantages of butterfly valves start to take over from around DN 50 mm and upwards. These operate from a zero bar pressureBy selecting 'Other',The upper diagram shows the flow when the coil is not powered.By selecting 'Other', you canIt is working great, only been installed for 2 days. Good tolerance to suspended solids, but not recommended for use with slurries or debris. The butterfly valve is well suited for a wide variety of fluid flow applications. Phone: 1-800-343-3618. All valves are FDA-compliant, designed for use in a wide range of stainless steel pipe systems, and can be built to comply with virtually any installation standard. A highly polished stainless steel disc with surface smoothness down to Ra In addition, Alfa Laval seal technology provides greater thermal stability, better chemical resistance and improved tensile strength. The valve is assembled by means of screws and nuts.The handle mechanically locks the valve in its open or closed position. For the LKB and LKB-2, the handles for the valve sizes DN125 and DN150 enable valve adjustment and can be locked in two intermediate positions to regulate the flow rate. Series L1 and L2Series L6, L4Series L12Series LW, LGPerformance Butterfly ValvesHigh-Cycle, Low Pressure Air. Separation Valve with. Cartridge BearingsHochleistungsklappe. Baureihe BARFor flow control applicationsFor cryogenic applicationsSeries BW. By doing this you are protecting the valve from dust and debris which may eventually cause seat leakage. This is fine and is common practice.

Ensure that there are no defects caused by storage or transportation. Wash with water or a mild detergent if needed. Wash with water or a mild detergent if needed. Support the valve where necessary to reduce load from the piping assembly. Test pressures above rated working pressure in the closed position can cause damage to the valve. If this occurs open the valve 10 to 15 degrees to obtain high velocity flushing action. Close and repeat if necessary. This will still allow a bubble tight seal but prolong life span of the seat. If necessary remove the actuator and manually operate the valve to fault find. Remove and check valve for foreign objects if required (see maintenance). Press out liner and replace with new part. Reinstall the disc and stem along with seals and clips. Refit into line as in installation sequence. This allows valve to be buried in pits and actuators to be above ground. September 12, 2019 Butterfly Valve Types: A Comprehensive and Updated Guide September 12, 2019 Show all 5 Butterfly Valves: The Ultimate Guide If you are looking for an easy installation and low-cost valve for fluid flow control and throttle with a tight shut-off, then look no further. You’re probably looking for a butterfly valve. We don’t exactly know what and where you will be using it for, but in this guide, you will find plenty of things insightful about Butterfly Valves. First, you will learn the basics on butterfly valves, its operation, installation and maintenance. Then, we will show you how a designer, engineer and investor thinks and does before actually buying high-performance butterfly valves. Beware that this IS an actionable guide. You might want to take down notes which can help you decide on how to choose and purchase butterfly valves. Contents of this Guide: Contents hide 1 Contents of this Guide: 2 What is a Butterfly Valve? 2.1 What type of valve is a butterfly valve? 3 Advantages 4 Disadvantages 5 What are Butterfly Valves used for? 5. www.goldenmachineries.com/d/files/dsc-installer-manuals.pdf

1 Regulating Fluid Flow 5.2 Flow Isolation 5.3 Backflow Prevention 5.4 General Butterfly Valves for Smaller Processing Units 5.5 High-Performance Valves for Heavy-duty industry applications 5.6 Constant Load Applications 6 Parts of a Butterfly Valve 6.1 Valve Body 6.2 Disc 6.3 Seat 6.4 Stem 7 Types of Butterfly Valves 7.1 How many types are there? 7.2 What are the two body styles of butterfly valves. A butterfly valve is a quarter-turn valve that initiates throttling and flow control of fluids. Given its name, you can easily visualize a thin metal disc that “flutters” about a fixed axis (stem assembly). The opening and closing mechanism allows and restricts the flow of a medium between an upstream and downstream pipe. What type of valve is a butterfly valve. In a more technical tone, a butterfly valve is a regulated rotary valve that consists of a rotating disk which directs the flow of fluid in a system. Basically, the disk is operable up to 90 degrees and that’s why it is called a quarter-turn valve. A butterfly valve controls the flow linearly and can be bi-directional. The configuration and operation of the valve is similar to a ball valve, but it is lighter and less costly. For throttling services, you can use a high performance butterfly valve, which is a higher industry standard for larger applications. Generally, this type of valve is manufactured to process large capacities and oftentimes, viscous and seawater medium. We will get more into high performance butterfly valves later. You can find butterfly valves typically in piping systems delivering large volumes of fluids. These valves are delicate and not recommended to handle dry bulk solids as they can choke or break the butterfly valve. The operation can be through a packing from a pneumatic actuator, an electric motor, a solenoid or a hydraulic piston and cylinder. Either way, this type of valve is the most economical and the easiest to handle. Butterfly Valves are also more affordable than other types of valves. Advantages Here are some of the advantages of butterfly valves compared with other valve types. Lightweight and compact Easy to install Low-pressure loss Low maintenance Simple, rapid operation Disadvantages The disc can interrupt flow even when it is open Not recommended for high differential pressures What are Butterfly Valves used for. Butterfly valves are used in many industrial applications such as: HVAC Vacuum service High-temperature applications Refrigeration and Air Conditioning systems Irrigation and agricultural needs Corrosive processing Lubrication Petroleum Industries Wastewater treatment Slurries Sanitary valve applications Sprinkler and fire protection systems When it comes to choosing a butterfly valve type for a specific application, one can look into a pile of different valve classifications. Seat, body and disc materials are varied depending on the service they will be used. Regulating Fluid Flow In butterfly valves, fluid flow constriction and control is easily done by just turning the valve handle. As it is a regulating valve, it controls the flow rate of system through the help of actuators. Basically, when a flow monitor senses that a set parameter (differential pressure) has been reached, it will signal the valve actuator to close or open the valve. To control a regulating valve remotely, it must have a flow controller which automatically communicates with the valve mechanism based on the flow rate. Flow Isolation Butterfly valves are used typically in low pressure and low-temperature applications. They are lightweight and easy to manipulate and its quarter-turn action can also be used for flow isolation. Backflow Prevention In food industries where there are aggressive washdown processes, butterfly valves can be used for backflow prevention. This is necessary, from standard regulations, as it is aimed in food processing to deliver procedures in sanitary conditions. General Butterfly Valves for Smaller Processing Units For example, lightweight and AWWA butterfly valves are meant for water lines and potable water control applications. Other light duty valves can be used for aquariums and sprinkler systems. Some valves are also meant for fuel flow control. High-Performance Valves for Heavy-duty industry applications For large and heavy-duty applications such as in oil and gas industries or high-pressure controls, high-quality and high performance butterfly valves are needed. These high-grade valves are certified and quality tested to meet quality demands and international standards. Constant Load Applications It should be noted that even though butterfly valves can handle large volumes of liquids, care is needed when controlling its load. This type of valve has a limited capacity in handling small load changes as only allowing a few millimeters opening is equivalent to a large volume difference. However, designs can be enhanced to diversify its control range, especially in larger applications where pressure is intricately regulated. Parts of a Butterfly Valve Generally, there are four main parts: the stem, disc, seat and valve body. Valve Body The valve body fits between the pipe flanges. It holds the other valve component into place. The valve body can be lug-type or wafer type. It can also be made of different materials depending on the application. For example, Carbon steel is a general type of valve body used in common applications that do not require corrosion resistant properties. Stainless Steel, Nickel Alloy and Titanium Alloy, on the other hand, can be used for corrosive environments. Disc Attached to the valve body is the disc that functions as a gate that stops fluid flow. Again, it can be made from different materials depending on application. Seat Lining the internal valve body is a strong elastomer or metal anti-leak seal that secures the disc in place. It main function is This can be soft seated or metal seated. Stem The stem is valve component that usually lies protected inside the disc in resilient valves. However, in high-performance valves, it is typically in contact with the fluid. The stem connects the disc to the actuator, like a shaft connecting a propeller to a motor. Similarly, the rotary action of the stem initiated from the power of the actuator is transmitted to the disc, allowing the close and open position of the valve. Types of Butterfly Valves How many types are there. Butterfly valves can be categorized in many types. The most known classification is by end-connection type (lug or wafer). But it can also be classified according to seat design, body material and offset design. Some even classify these valves according to their mode of operation. But each classification can also be intertwining. For example, you need a specific design for severe, heavy-duty applications where vibration is high and the substance is corrosive. What are the two body styles of butterfly valves. Plus, PTFE lined seat has a low coefficient of friction which makes it ideal for low torque applications. On the other hand, Stainless steel butterfly valves can be used in processing corrosive substances as they have a higher resistance to corrosion than inconel. The stem is mounted in a vertical axis at the center of the disk. The movement is calculated with a specific cone profile to address shut off of high pressure applications. This helps provide a tighter seal. In this type of valve, there is a combination of the double offset design and an additional offset of the disk seat axis. As the stainless steel material is a combination of iron, nickel, chrome (10.5) and sometimes Molybdenum, it possesses both strong acid endurance and strength of steel. It is lightweight and corrosion-resistant. Nickel aluminum bronze is a composition of 10 aluminum, 5 iron and 5 nickel. For a more detailed discussion of butterfly valve types, you can refer here. Valve Actuation There are many ways to operate a butterfly valve. It can be manual, semi-manual or automatic. Pneumatic Butterfly valves are typically used for transferring compressed and pressurized air. Hence, they are not automatic. How Do Butterfly Valves work. Check out this video to see how this type of valve work. Installation Here are few installation tips, as well as a checklist to take note of: In order to check parts of the butterfly valve, you can be able to disassemble it in order to further inspect its parts. For guidance, you can check out this on assembly and disassembly of butterfly valves. Before anything, see to it that the flange and pipeline are clean from foreign materials. These can damage the seat or disc and can also cause disc to movement restrictions. Since resilient seated valves extend to both faces, gaskets are not needed. In order to easily insert the valve body, spread the flanges and align the pipe-work. With this the valve body is inserted even with no contact to pipe flanges. Partially open the valve disc to prevent the valve from jamming. Insert the valve between the flanges, taking care not to damage the seat faces. When you lift the valve, hold it by the locating holes. Also, you can tie up a nylon sling around the body or the neck.Make sure you do not lift the valve at the actuator or its operator. Once the valve is placed and aligned in between the flanges, insert all the bolts before hand-tightening them. Slowly open the disc. This will test if it has the right clearance form the inside of the pipes. Afterwhich, a gradual closure of the valve should also be done to verify enough clearance from the disc to the pipe flanges. Fully open the valve, and start to tighten all of the bolts. To test proper clearances after fastening the valve in the pipeline, repeatedly fully open and close the valve. This ensures the valve functions well during operation. Maintenance of Butterfly Valves Valves, as having constant contact with fluids, are prone to rusting and corrosion. The applied grease on the butterfly valves should also be monitored. Apply grease at constant intervals, based on manufacturer’s recommendations. To apply grease, the grease fitting is located at the top of the valve. Also, to ensure that the right amount of grease is placed, apply grease to the neck of the valve until old grease flows out and is replaced by newly applied grease. For greasing the gearbox, a lithium-based grease is recommended. If cleaning is necessary, you can use silicon-based lubricants and other silicon-based products. When not used regularly, exercising the valve by rotating it once a month can ensure the valve will continually be operational. What to Consider When Choosing Butterfly Valves. When choosing butterfly valves for your operation, you would need to determine a few things before jumping in with the technical specifications of the valve. These basic information are the valve application, type of fluid, mode of operation and mode of installation, which are expounded below. Valve Specific Application The first thing you have to determine when choosing a butterfly valve type is to know what you will use it for. Do you need it for flow control applications such as regulating or stopping fluid flow. Type of Fluid Next is to know what type of fluid or substance will be circulating your system. Butterfly valves can generally accommodate liquids and gases, but not bulk solids. Also find out the properties of your media. It could be corrosive which requires stainless steel valve body and disc. However, for general fluids such as water, you can use carbon steel or cheaper alloys. Mode of Operation After knowing the type of fluid, you can choose the mode of operation of the butterfly valve. Manufacturers and suppliers usually have a range of choices for this.