Flanged butterfly valve
The Flanged Butterfly Valve features a double flange design that is perfect for heavy industry, shipbuilding and other harsh vacuum applications. It comes with an ISO5211 top flange to make it easier to attach an actuator and has a stem anti-blowout design for added safety during use. The bonded seat adds further protection by preventing contact between the body and shaft with the medium being used. Other amazing features include single flange mounting, an ability to be installed in any desired position, bubble-tight shut off at full pressure rating as well as large flow capacity and enough strength. The valve is ruggedly constructed for strength and durability, making it ideal for any industrial or manufacturing environment. A true powerhouse of fluid regulation technology!
Double flanged butterfly valve features a bonded liner extending over the flanges. The double flange design is suitable for high pressure loading and for use in heavy industry, shipbuilding, severe vacuum applications and water treatment industry like potable water, water treatment and wastewater applications.
1,ISO5211 top flange together with stem heat suitable for direct mounting of actuators
2,Stem anti-blowout design keep safety in field use
3,Bonded seat protects the body and shaft out of contact with medium
4,No exposed pins or bolts for stem-to-disc connection
5,Single flange mounting is possible
6,Can be installed in any desired position
7,Bubble-tight shut off at full pressure rating
8,Large flow capacity and enough strength
PARTS LIST AND MATERIAL SPECIFICATION
|1||Body||ASTM A536 65-45-12, WCB, CF8M
Bonded with NBR or EPDM
|2||Disc||ASTM A536 65-45-12 Nylon coated, CF8, CF8M, 2507, 1.4462|
|7||Bearing||RPTFE with Graphite on I.D.|
|8||Lower Stem||SS420, SS431|
|9||Bottom cover||Same as body|
|Nominal diameter||2″ – 88″ (DN50mm – DN2000mm)|
|Operating pressure||16bar for DN50-DN300, 10bar for DN350-DN2200|
|Temperature range||-20 °C to + 140 °C (depending on pressure, medium and material)|
|Flange accommodation||EN 1092 PN 6/PN10/PN16
ASME Class 150AS 4087
PN10/ PN16JIS 5K/10K
|Applications||Potable Water, Wastewater, Seawater, HVAC|
|Operation||Hand lever, gear box, pneumatic actuator, electric actuator|
What is a flanged butterfly valve?
A flanged butterfly valve is a quarter-turn rotational motion valve used to regulate the flow of liquids and gases. It consists of a disc or vane that can be rotated inside the body of the valve in order to open, close, or partially obstruct it. The main advantages of using a flanged butterfly valve are: ease of maintenance and installation (valve changes require no special tools), compact design (the valves take up very little space compared to other types), affordability, durability, bubble tight shutoff (when closed properly), and low pressure drop across the valves.
Flanged butterfly valves have two main components – the body assembly and the disk assembly. The body of these valves often comes with an external thread for mounting purposes. A built-in flange on both ends ensure secure connection between two pipes by utilizing studs, nuts, gaskets, etc. Moreover there are various sizes for different applications from small bore sizes such as 1/2″ to 4″, medium bore size ranging from 4″ – 12″, and large bore sizes ranging from 14” up to 24″ which are mostly used in industry applications like water treatment plants or power plants where heavy pressure is required .
What is the difference between a lug and flanged butterfly valve?
The main difference between a lug and flanged butterfly valve is in the way they are attached or mounted to the piping system. A lug-style butterfly valve uses a single unit that includes wings (lugs) which protrude from either side of the body, allowing it to be secured directly to mounting lugs on the pipe or fitting (e.g., weld neck flange). On the other hand, flanged butterfly valves use bolts and/or gaskets and fasteners for attachment purposes, allowing them to be securely mounted onto an existing pipeline with a separate flange connection.
Lug-style butterfly valves also feature holes which align with those of its mating component (usually by bolting), providing additional stability when compared to their flanged counterparts. Additionally, these style of valves provides faster installation time since no welding is necessary and can present cost savings due part avoidance from not having two purchase components separately. Conversely, one downside associated with this design is that if torque values exceed what was initially specified by manufacturer’s recommendations than leakage can occur between parts due lack interlocking features among them.
What is a single flange butterfly valve?
A single flange butterfly valve is a quarter-turn valve that features an exposed, single-piece body and disc design. This type of valve utilizes a mechanically-driven, circular disc that rotates to regulate the flow of the media within a piping system.
Single flange butterfly valves are typically used in applications including commercial water treatment systems, industrial water distribution systems for process control, agricultural irrigation systems, and many other plumbing operations. They can also be found in chemical processing plants as well as hydroelectric power stations.
One major benefit of using this type of valve is its ability to handle high flows with minimal pressure drop. The single piece body and disc design prevents unwanted material from entering the system via potential leak paths making it ideal for containing hazardous fluids or slurries at higher pressures than many competitive products. Additionally, since butterfly valves rotate only 90° to open or close—as opposed to traditional gate valves which need two turns—they offer faster operation resulting in improved energy efficiency and reduced maintenance costs over time.
What is the difference between a wafer and flanged butterfly valve?
When it comes to valves, there are a number of options available. Two main types includes wafer and flanged butterfly valves. Despite the similarities, the two valve types have some distinct differences that should be taken into consideration before selecting one for a particular application.
The most prominent difference between wafer and flanged butterfly valves is their connection type. Wafer butterfly valves use lugs on the disc to fit between two pipe-ends or supports on either side while Flanged butterfly valve use bolts through machined holes in small steel rings, called “flanges”, which are screwed into the grooves of each pipe-end or support (leveraged with nuts). As such Flanges offer a much more secure connection no matter what form of material is used making them far more suitable for high pressure applications than those using lugged discs as found in wafer valves.