Butterfly valves butterfly valves use a similar principle to ball valves. The delval series 4041 industrial split body butterfly valves have been designed to include stateoftheart features that are described in this bulletin. Butterfly valves have been around for a long time, and are used for a variety of applications. Again the orientation of the butterfly determines the flowrate. Air operated external air cylinder air operated internal air cylinder air operated inline air cylinder pressure balanced valve. A 90 rotation of the handle provides a complete closure or opening of the valve. Butterfly valves type 57, 56, 56d pneumatic actuated type ta, tw 2 2 general operating instructions never attempt to disassemble an actuator. The butterfly valve boasts a long life span and has few faults. Low torque design the series 2100 butterfly valve is available with a 100psi closeoff rated disc that is undercut to reduce torque. Cast iron butterfly valves other butterfly valves download general catalogue.
Triad offers the series st high performance butterfly valves for use in steam and various process systems. Emergency valves internal selfclosing stop valves manually operated. Process systems stocks a wide range of butterfly valves for general industrial, mining and agricultural applications. Part name material 1 body ductile iron astm a536 2 shaft 416 stainless steel astm a276 3 disc 316 stainless steel astm a351 cf8m 4 seat epdm bunan viton 5 lower bushing ptfe 6 middle bushing ptfe 7 upper bushing ptfe 8 oring nbr 9 retainer steel astm a283 10 retainer bolts steel astm a283 11. All are available with manual, electric or pneumatic actuation double acting or spring return. When the valve is closed, the disc is turned perpendicular to the flow so that it completely blocks off the waterway. Proudly serving satisfied customers for over 50 years. Large butterfly valves are usually equipped with a socalled gearbox, where the handwheel by gears is.
In this case maximum pressure is 50% of the normal pressure rating. The double offset design of the st provides prolonged service life of the seal. The wafer style butterfly valve is just about the standard. Butterfly valves are designed with face to face dimensions according to international.
Find butterfly valves on globalspec by specifications. A valve with a circular body and a rotary motion disk closure member, pivotally supported by its shaft. This provides a robust, positive means for shutoff, particularly for highpressure andor high temperature applications. Butterfly valves duocheck valves ystrainers world wide metric. If disassembled forcible, internal parts may jump out and this is very dangerous.
A butterfly valve is a quarterturn rotational motion valve, that is used to stop, regulate, and start flow. This valve is not designed to handle impacts of any kind. A butterfly valve is a quarterturn valve from the family of valves known as wafertype valves. Only flowserve replacement repair parts should be used. The manual butterfly valve model vvf not being safety valves cannot be used for the interception of explosive substances, inflammables, toxic or combustible products. F250 for inch od tubing f251 for metric tubing pentair hygienic process valves formerly keystone with pentairs unique wafer flanged valve, removing the valve from the pipeline is as quick and easy as undoing the jacking bolts. However, instead of a ball mounted in the valve body a circular disc called a butterfly because the two half circles around the vertical shaft appear like wings. These valves feature precisionmachined parts insuring years of dependable operation. For valves supplied with amaterial, chainwheel, the positive restraint option is recommended.
In this manual these will be referred to as eriks, the individual terms of delivery of the eriks. The high performance valve is available in both carbon steel and stainless steel with other metals offered as special production. Iron butterfly valve for potable water 200 psi nonshock wog bidirectional dead end service to 200 psi max air to air pneumatic actuator cla23e 212 specifications. Butterfly valves control flow through a circular disc or vane by turning the valve s pivot axis at right angles to the direction of flow in the pipe. When the butterfly valve is fully opened, the disc is at a right angle to the flow of gas or liquid. Rubber seated butterfly valve, sizes 3 through 20 inches general butterfly valves shall be manufactured in accordance with the latest revision of awwa c504, class 150b and conform to ansinsf 61 and ansi nsf 372.
They made their first appearance during the 1930s, and have been utilized by several industries ever since. The control valve handbook has been a primary reference since its first printing in 1965. This fourth edition presents vital information on control valve performance and. The seat in a resilient seated butterfly valve has molded orings on its flange face. Butterfly valve function is similar to sluice valves and would be used in similar situations but would not be used in sewage installations.
Read carefully the enclosed manual before installing, use and maintenance of the said valve. Preface control valves are an increasingly vital component of modern manufacturing around the world. Certain dry materials may also be handled through a butterfly valve. Butterfly valve, manual huntington vacuum products, a. Carbon steel body stainless steel disc and stem iso 5211 actuation mounting. Johnson controls currently manufactures three different styles of globe valve. Properly selected and maintained control valves increase efficiency. As line pressure increases, the seal tightens, axially. The difference between a lug and wafer butterfly valve. If normal operation is still not restored through the above procedure, damage of the seat. Relative density with relation to the air in normal conditions. Grooved butterfly valve with tamper switch system no. The advantages, components and application of butterfly.
Bidirectional design the symmetric valve body and seat are of a bdirectional design with no change in characteristics. Bolt connection for butterfly valves and slip on flanges ns. A butterfly valve is used to control the flow of material through a circular pipe or tube. Concentric rubber lined butterfly valve 2 piece split body ptfe lined butterfly valve double eccentric high performance butterfly valve triple eccentric high performance butterfly valve dual plate check valve engineering data 04 12 14 17 20 22 valve configurations scale drawing to actual size application this catalog remains the property of ms. The tx3 triple offset butterfly valve is a torqueseated valve, utilizing the torque provided by the operator to create a seal, rather than by positioning of the disc. Typically the material is air, gas, steam, or liquid.
Butterfly valves introduction quarter turn rotational motion. In our quest for new sustainable solutions, we regularly set new milestones in valve technology. A part of a valve trim that surrounds the closure member and may provide flow characterization and or a seating surface. A butterfly valve exhibit 1 operates by opening and closing via a disc the butterfly. There are a few different types of butterfly valve. It as so common that no one even bothers to use the word wafer when ordering a butterfly valve. The f250 and 251 butterfly valves are used for inline isolation or control of process or c. Maximum working pressure normal temperature mpakgfcm2. Quality is designed into the series 200 butterfly valve, utilizing the phenolicbacked cartridge seat pioneered by center line. Garlock butterfly valves for corrosive and abrasive media the economic advantages of reduced maintenance, smooth operation and exceptional service life are proven over and over again. For custom or larger sizes please use our online request for quote form. This product is a double eccentric butterfly valve, which controls fluid by 90 degrees. The reduced torque allows the use of smaller, wider variety, and more economical. Butterfly valves in cast iron, stainless steel and pvc.
Butterfly valves, available in the wafer and lug versions, measurements from dn 40 to dn 600. Tricentric triple offset butterfly valves meet industry requirements and provide low cost of ownership to the end user through. 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. Butterfly valve technology has evolved dramatically over the past half century, as has its industry popularity. Delval series 4041 industrial split body butterfly valves. Excellent seat sealing capability and durability by adopting sphericalsurface disc and sphericalsurface.
Using a positivepressure gas with our plastic piping may pose a dangerous condition. The disk is always in the passageway, but because it is relatively thin, it offers little resistance to flow. The tricentric brand is well known in the industry as a high quality metal seated valve that. Wafer style is the more common of the two and is less expensive than the lug style. Before taking the butterfly valve for pipe installation, make sure that it is cleaned from inside and outside and there are no foreign or metallic objects sticking on to its sealing elements. Econ butterfly valves are being supplied by several eriks operating companies worldwide. The butterfly valve is designed for easy maintenance. When the butterfly valve is fully closed, the disk completely blocks the line. Garlock does not offer rubber or metal valves, so our main focus will be on plasticlined valves. The manufacturer shall have produced awwa butterfly valves for a minimum of five years. A butterfly valve is a flow control device that incorporates a rotational disk to control the flowing media in a process.
It may also provide stability, guiding, balance, and alignment, and facilitate assembly. The normally open versions of these valves are shown in figures 1, 2, and 3. Butterfly valves manual, double acting, spring return. Valves common types butterfly valves butterfly valves use a similar principle to ball valves. With many body trim combinations, there is a series 200 valve to meet your application. Butterfly valves type 56, 75, 56d, 75d 3 3 general instructions for transportation, unpacking and storage when suspending and supporting a valve, take care and do not stand under a suspended valve.
This valve is resilient seated and hence gives droptight closure over long periods. Both the metal seat and the ptfe seat are in tight contact with the disc. To use the system to its full life span, you should install it correctly according to the manual and maintain it according to the prescribed procedures while using it. The reliability of garlock butterfly valves is not only appreciated and well. Garlock valves set the standards in taluft compliance. They are normally used as throttling valves to control flow. Standard valves from dn50 to dn150 are delivered with lever. Available in wafer, lugged and flanged contact us for triple offset, double flanged or other variations. They take it for granted that if they order a butterfly. The butterfly valve consists of only four main components.
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