VALVE

  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‐pressure applications such as ethanol or HVAC. It generally uses PTFE or plastic as its seat material, but metal seats are also available to meet fire‐testing specifications like API 607. Offset Disc Butterfly Valves are comprised of the following components: Body Retainer Plate Seat Disc Stem Stem Seals Standard double offset butterfly valves come with a polymer seat, usually PTFE, with a metal backup for fire safety. Metal‐to‐metal seats are also available and may provide a higher sealing quality, and allow slightly higher temperatures. FEIDA VALVE is the top ranking  China doubl...

  FEIDA VALVE is the top ranking  Chi na  double offset butt erfly valve  man ufacturer  aslo a top ranking   Stainless Steel Resilient Gate Valve manufacture r . 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 butterfly valve is certificated by American Petroleum Institute (API) according to API 607 standards. FEID AVALVE stainless steel resilient gate valves are designed with built-in safety in every detail. The wedge is fully vulcanized with FEID AVALVE’s own drinking water approved EPDM rubber compound. It features an outstanding durability due to the ability of the rubber to regain its original shape, the double bonding vulcanization process and the sturdy wedge design. The triple stem seal system, the high strength stem and the thorough corrosion protection safeguard t...

  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 optional 8. Excellent flow and throttling characteristics covering services from cryogenic to high temperature Comparison to Ball valve 1. Double offset structure design, the disc is easy to take off from the seat during CLOSE to OPEN. 2. Lower torque than ball valve, so the cost of actuator will much more lower than the ball valve 3, Smaller size, the small size, the light mass will be a lower cost of valve with the same piping internal dimention. 4. longer life cycle 5. ON/OFF operating time is less than 1.5 second. 6. Maximum 30 operating within 1 minute. FEIDA VALV...

  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 how thoroughly the pipe is flushed upon installation or repair. Thus, any metal wedge will eventually lose its ability to be drop-tight. A resilient seated gate valve has a plain valve bottom allowing free passage for sand and pebbles in the valve. If impurities pass as the valve closes, the rubber surface will close around the impurities while the valve is closed. A high-quality rubber compound absorbs the impurities as the valve closes, and the impurities will be flushed away when the valve is opened again. The rubber surface will regain its original shape securing a drop-ti...

  High performance butterfly valves are usually made from metal like stainless steel or cast iron because they offer the most strength and durability against high pressure. They can range from less than a foot to more than a yard in diameter depending on the application. Different kinds of butterfly valves are used in different situations; triple offset butterfly valves, for example, are used for pipe lines with moderate to high pressures that require more control and tighter seals whereas  FEID AVALVE high performance butterfly valves  are sanitary and are therefore used in water pipes. High performance butterfly valves are constructed using solid pieces of high quality metal in order to exceed the standards of regular valves. These hydraulic and pneumatic valves can be used in many situations that transport water, chemicals, slurries and gases among other substances. High performance butterfly valves are usually double offset valves that are designed to be eccentric in ...

A  Butterfly valve  is a quarter-turn rotational motion valve, that is used to stop, regulate, and start flow. A butterfly valve has a disc which is mounted on a rotating shaft. When the butterfly valve is fully closed, the disk completely blocks the line. When the butterfly valve is fully opened, the disc is at a right angle to the flow of gas or liquid. The butterfly valve consists of only four main components: body, disk, stem and seat. Butterfly valve body: Butterfly valves generally have bodies that fit between two pipe flanges, the most common being lug and wafer body design. Butterfly valve disk: The disk is how the valve stops flow – it is equivalent to a plug in a plug valve, a gate in a gate valve or a ball in a ball valve. There are variations in disk design and orientation in order to improve flow, sealing and/or operating torque. Butterfly valve Stem: The stem of the butterfly valve may be a one-piece shaft or a two-piece (split-stem) design. The stem in most resi...