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Differences between API609 Category A and Category B
Aug 19,2022
API 609 is the American design standard forbutterfly valves, which is divided into Category A and B. Category A valves are "concentric" type. Also known as rubber lined butterfly valves. These are popular in low pressure systems (Class 150 or less), relatively lower cycle life, rubber liners are also good for abrasive slurry services. Category B valves are "offset" type, meaning the shaft is offse...
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What is Category B butterfly valves?
Aug 3,2022
A butterfly valve, abbreviated as BTFLV, is a quarter turn valve (90° or less) with a circular disk as its closing element. The standard design has the valve stem running through the disk, giving a symmetrical appearance. Other designs offset the stem. Advantages include less wear and tear on the disk and seats, and tighter shut-off capabilities. When space is limited, some...
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WHAT IS A HIGH PERFORMANCE OR DOUBLE OFFSET BUTTERFLY VALVE?
Jul 14,2022
High Performance Butterfly Valves use a disc offset from the seat center, hence the name Double Offset. In this configuration, the disc is eccentric, or offset, from the valve seat. As the disc starts to rotate, it moves away from the seat instead of across it. This design actually uses the line pressure to help give it its seal. This feature allows the use of offset butterfly valves in high‐press...
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What is A High Performance Butterfly Valve
Jun 23,2022
High performance butterfly valves can be used for shutoff and throttling control. They are designed to handle everything from general applications to viscous and corrosive liquids; corrosive gases and steam. A wide variety of seat types are available including: PTFE seat - providing bubble-tight shutoff in both directions, Seats for dirty, viscous services Fire safe seats - designed for fire...
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Butterfly Valves – An Economical Choice - High Performance Butterfly Valve
Apr 15,2022
Butterfly valves are a great (and less expensive) alternative to globe and other control valves in applications where 1-2% accuracy is acceptable. Process conditions will dictate whether a resilient seated or high performance butterfly valve should be selected. A resilient seated butterfly valve is the most economical choice. If pressures and temperatures are not extreme, this type of valve should...
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An Overview of Butterfly Valves
Jan 21,2022
HIGH PERFORMANCE BUTTERFLY VALVE (also called double offset) have two offsets: The first offset of stem is off center to or behind the disc seating face, followed by the second offset, which shifts the stem off centerline of the pipeline. This double offset creates camming action, moving the disc away from the seat rather than across it, reducing rubbing between the disc and seat as seen in concen...
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Brief introduction of FEIDA VALVE
Nov 8,2021
FEIDA VALVE is the top ranking China double offset butterfly valve manufacturer aslo a top ranking Stainless Steel Resilient Gate Valve manufacturer. The annual output of high performance butterfly valve and stainless steel soft seated gate valve is more than 100,000,000 set. The API 607 fire safe high performance butterfly valve is also in FEIDA VALVE product range. Our fire safe butter...
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Benefits of VPSA/PSA high performance butterfly valve in comparaison with a ball valve about VPSA/PSA generator
Sep 27,2021
Compare to ball valve, FEIDA VPSA/PSA butterfly valve is better than ball valve for sure. Please see the listed excellent feature following: 1. Long service life, open/close 1 million times 2. Super reliable sealing performance: bi-directional sealing zero bubble 3. Patent seat design 4. Vacuum service ability 5. Available fully rated to class 2500lb 6. Anti-clout device design 7. Fire-safe design...
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Is It Okay To Install The Butterfly Valve Upside Down?
Sep 6,2021
Butterfly valves are commonly used in many applications. This is due to the efficiency of the butterfly valves’ mechanism. There is an increase in demand when it comes to a butterfly valve. Currently, butterfly valves have become the first choice for many people in different working conditions. But when it comes to their installations there are a lot of people who do not understand or have little ...
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Metal seated vs resilient seated gate valves | Valve manufacturer
May 18,2021
Before the resilient seated gate valve was introduced to the market, gate valves with a metal seated wedge were widely used. The conical wedge design and angular sealing devices of a metal seated wedge require a depression in the valve bottom to ensure a tight closure. Herewith, sand and pebbles are embedded in the bore. The pipe system will never be completely free from impurities regardless of h...
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