Less expensive valves for nondemanding, nonabrasive, lower temperature applications. A guide to types of valves introduction a valve is a device that regulates the flow of gases, liquids or loose materials through an aperture, such as a pipe, by opening, closing or obstructing a port or passageway. In lever version, the opening angle is clearly indicated on the index plate. Api 609 centric butterfly valves soft seated are preferred to gate and ball valves for lowpressure and noncritical applications as they are cheaper, lighter and easier to install. Aquaseal 16 integrallymoulded butterfly valve pn 16 aquaseal 16 integrallymoulded butterfly valve sets a new benchmark in performance for butterfly valves. Available in classes 150, 300 and 600 and in sizes 2 to 48 depending on pressure class. These valves feature precisionmachined parts insuring years of dependable operation. It means that if you choose ball valve over butterfly valve for the same function. Basics of butterfly valves animation of butterfly valve. Some valves are capable of throttling flow, other valve types can only stop flow, others work well in corrosive systems, and others handle high pressure. In piping following types of valves are used depending on the requirements. Which type of butterfly valve to be specified wafer,lug. Kitz lugged type butterfly valves are rated for dead end service to full working pressure of the valve. When the butterfly valve is opened all the way, the disc rotates a 14 turn, allowing for a nearly unrestricted passing of the fluid.
Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Lower head loss means getting the most from your pumping station dollar. These are considered high recovery valves, since only the disc obstructs the valve flow path. To select the correct valve to fulfill these functions properly, an outline of the different types of valves and. For valves supplied with amaterial, chainwheel, the positive restraint option is recommended. Butterfly valves data sheets downloads hakohav valves. A valve controls system or process fluid flow and pressure by performing any of the following functions. Awwa butterfly valves can be applied in applications demanding highquality and thoroughly tested valves which offer many years of troublefree service. Compare ball, gate and butterfly valves lockout tagout. A typical flanged butterfly valve is illustrated in fig.
And the cost of a given type and size of the valve can vary 100%. Dezurik awwa butterfly valves are designed for applications throughout water and wastewater treatment plants, water distribution systems, power plants, and industrial plants. Butterfly valves shall be wafer or lug style, as manufactured by asahiamerica, inc. Whats different about zero, double and triple offset. They are thin, usually taking up much less space in a pipeline than ball valves. The butterfly valve designed in the form of a disc or double or triple offset shafts that operate perpendicular to the flow direction, these valves ideally can control flow, but do leave some residual material in. Ball valve, for onoff control without pressure drop. This product is a double eccentric butterfly valve, which controls fluid by 90 degrees rotation of the disc. Characteristics of valve by type common metal types used in valve manufacture. Kitz dj series butterfly valves flange table connection size standard bs en 1092 bs10 asme b16. Different types of valves used in piping a complete. They are usually manufactured in flanged, wafer, and lug, or singleflange type designs. Flow indication marked, iso standard valve rotating shaft. Properly selected and maintained control valves increase efficiency, safety, profitability, and ecology.
Control valves are an increasingly vital component of modern manufacturing around. The control valve handbook has been a primary reference since its first printing in 1965. Valves common types check non return valves check valves or non return valves are designed to ensure one way flow only. The highly reliable butterfly valve has successfully completed over 10,000. Different types of valves with pdf file engineering.
Butterfly valves can be used as a control valve and also as a shutoff valve, as discussed in chapter 3, section 3. The new generation of butterfly valves and actuators from belimo. The factor that is most useful in selecting a valve type for a given application is the flow characteristic. Growth has been constant with the addition of an awwa butterfly valve, general service butterfly valve, swing check valve, rubber. Butterfly valves are popular because of their lowprofile designs. Butterfly valve types wafer, lug, double offset and. Types of butterfly valves api 609 projectmaterials. Butterfly valves provide bidirectional deadend service in commercial and industrial service. A butterfly valve is a valve that isolates or regulates the flow of a fluid.
The ball valve a rotary ball design is the main component of these valves. A complete butterfly valve line to provide optimal performance our complete range of butterfly valves extends from general purpose to severe service models used for isolation and throttling applications. These valves are used primarily in the water, wastewater, and industrial markets. Lower torques mean less costly actuation packages, and the maintenancefree design helps keep your budget under control. Usually used in water pipework systems and installed immediately after the pump. Ideal for quick shutoff, since a 90 turn completely shutsoff, compared to multiple 360 turns for other manual valves. Butterfly valves types, construction, applications and. Caution never remove valve from pipeline under pressure. With many bodytrim combinations, there is a series 42 or 44 valve to meet your application.
To adequately cover the variations in disc geometries common in nuclear power plant applications, a total of 25 disc shapes were included in the test matrix. Please consult your local bray representative for your specific condition. To make your selection easier, nibco offers specification and submittal assistance. Designed specifically for the waterworks industry, lineseal butterfly valves offer the ruggedness and reliability required for buried service and performance.
Quick to respond, these valves are also easy to use and maintain, and are ideal for clean operations. Material 1 body 1 pp, pvdf 2 disc 1 pp, pvdf 3 seat 1 epdm, fkm. It includes resilient seated valves for long service life and bubble tight shutoff. Depending upon the materials of construction and the seat design a butterfly control valve may have very limited shutoff pressure drops. Bf series waferlug butterfly valves milliken valve.
The difference between a lug and wafer butterfly valve. Effect of butterfly valve disc shape variations on torque. Valve types and features the three basic functions of valves are. The following article will cover the general mechanism and function of the most typical of these valves used in steam systems, such as ball valves, butterfly valves, globe valves, gate valves, and diaphragm valves according to jis, a valve is defined as. Garlock does not offer rubber or metal valves, so our main focus will be on plasticlined valves. The most common check valve is the disc type horizontal or vertical. Many different types of manual valves are used in industrial applications worldwide. Type bfv 125150 wafer installation butterfly valves are manufactured in accordance with the specifications from iso 5272, international standards organization and mss sp67, manufacturers standardization society and api609, american petroleum institute. These valves satisfy a wide range of industrial applications and are available in carbon steel or stainless steel, as well. The plugs in plug valves have one or more hollow passageways going sideways through the plug, so that. This is due to the disc always being perpendicular or parallel to the flow, resulting in a pressure decrease regardless of the position it is in. Chapter 4 describes digital valve controllers, analog positioners, boosters, and other.
Control valves are an increasingly vital component of modern manufacturing around the world. With the triple offset butterfly valve there are three offsets. Types of butterfly valves api 609 a butterfly valve is used to shut off or modulate the flow of a fluid isolation and regulation. Tfp1540 0818 resilientseated gate valves outside screw and yoke. You also get the assurance of the nibco warranty, along with superior customer service expertise. Types of manual valves tlv a steam specialist company. Both lug and wafer series valves are designed for ansi 125150 lb. Used for high pressure drops found in oil and gas wellheads, not to be confused with engine choke valve. To select the correct valve to fulfill these functions properly, an outline of the different types of valves and their features is given below. Published on august 31, 2017 august 31, 2017 28 likes 4 comments. Valves can be categorized into the following types, based on their operating mechanism. Milliken valve was started over three decades ago manufacturing the eccentric plug valve for the waste water and hvac marketplace.
Operation is similar to that of a ball valve, which allows for quick. A 90 rotation of the handle can completely close or open the valve. The versatile valve is offered in a variety of elastomerdisc combinations to address myriad process requirements. You can also open the valve gradually to reduce flow.
What different types of butterfly valves can i buy. Two are placed in a similar position to the double offset butterfly valve, while the third offset is the geometry of the seating surface, creating a type of cone shape of the disc and seat. Butterfly valve types wafer, lug, double offset and triple offset types a butterfly valve is a quarterturn rotary motion valve, that is used to stop, regulate, and start the flow. The flow capacity is relatively high and the pressure drop across the valve is relatively low. Which type of butterfly valve to be specified wafer,lug or doubleflanged. Each type of valve has been designed to meet specific needs.
Butterfly valves consist of a disc attached to a shaft with bearings used to facilitate rotation. For information on butterfly valves consult the engineering data book section vb2. Figures 59 show the geometry, relative proportions and key features for various types of butterfly valves that were tested. Turning the butterfly disk, to close the valve, blocks the passage of the fluid. The difference in the two main variations of butterfly valves is how they attach to the pipeline.
Flowseal high performance butterfly valves are available in sizes from 2 48 in asme pressure classes 150, 300, and 600 and are available with a diverse range of actuation options. Series 31h lug resilient seated butterfly valves are drilled and tapped to meet asme class 125150 and pn16 flanges. Trusted throughout chemical, petrochemical and many other industries leaders in sealing integrity 3 garlock butterfly valves for corrosive and abrasive media the economic advantages of reduced maintenance, smooth operation and. The cost of valve in the piping system is up to 20 to 30% of the overall piping cost.
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