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Flanged ball valve is a relatively new type of ball valve, and its own structure has some unique advantages, such as no friction to the switch, small wear on the seal, and small opening and closing torque.
The flanged ball valve is equipped with a multi-turn electric actuator, and the medium can be adjusted. It is widely used in petroleum, chemical industry, urban water supply and drainage, etc. Ball valve and gate valve belong to the same type of valve, the difference is that the closing part of the flanged ball valve is a sphere, which rotates around the center line of the valve body to open and close.
Ball valves are mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. A flanged ball valve is defined as a valve whose opening and closing member (ball) is driven by a valve stem and rotates around the stem axis.
The ball valve flange type and gate valve belong to the same type of valve, the difference is that its closing part is a ball that rotates around the centerline of the valve body to open and close.
The three-piece ball valve is a new type of valve that has been widely used in recent years. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. The V-shaped opening ball valve also has a good flow adjustment function.
Flanged ball valve has the following advantages:
1. The fluid resistance is small, and its resistance coefficient is equal to the resistance coefficient of the pipe section of the same length.
2. Simple structure, small size and light weight.
3. Tight and reliable. At present, the sealing surface material of flange type valve is widely made of plastic with good sealing performance, and it is also widely used in vacuum system.
4. Easy to operate, quick to open and close, just rotate 90° from fully open to fully closed, which is convenient for remote control.
5. Easy maintenance, simple structure of ball valve, generally movable sealing ring, easy disassembly and replacement.
6. When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and the sealing surface of the valve will not be eroded when the medium passes through.
7. Wide range of applications, from a few millimeters to several meters in diameter, from high vacuum to high pressure.
1. No friction when opening and closing. This function completely solves the problem that the traditional valve affects the sealing due to the friction between the sealing surfaces.
2. Top installation structure. The valve installed on the pipeline can be directly inspected and maintained online, which can effectively reduce the downtime of the device and reduce the cost.
If you are looking for more details, kindly visit ANSI Standard Flange Type Gate Valve.
3. Single valve seat design. It eliminates the problem that the abnormal increase of medium pressure in the valve cavity affects the safety of use.
4. Low torque design. The specially designed valve stem can be easily opened and closed with a small handle.
5. Wedge-shaped sealing structure. Through the mechanical force provided by the valve stem, the ball wedge is pressed against the valve seat to seal the valve, so that the sealing performance of the valve is not affected by the change of pipeline pressure difference, and reliable sealing performance is guaranteed under various working conditions.
6. Self-cleaning structure of sealing surface. When the ball tilts away from the valve seat, the fluid in the pipeline passes through the sealing surface of the ball evenly at 360 degrees, which not only eliminates the local scouring of the valve seat by the high-speed fluid, but also washes away the accumulation on the sealing surface of the flanged ball valve. for self-cleaning purposes.
When we talk about the specifications of gate valves, the American standards are important parameters for the gate valves. Basically, there are two main standards that specify the gate valves: ANSI standards and AWWA standards.
When we talk about ANSI valves, we talk about valves designed according to with ANSI Standard.
ANSI is the abbreviation of the American National Standards Institute, which is a non-profit organization that sets general standards of the quality, the process, and the system of all the industrial products in the United States. There are thousands of regulations that impact almost every industrial sector in the USA, including the valve production industry.
What does the ANSI valve mean: it refers to the valve that falls under the ANSI standard of that governs the gate valve in any industry that makes use of them.
This ANSI standard contains descriptive information such as repair procedures, valve dimensions, the wall thickness of the valve and the inspection processes, etc.
The AWWA is the abbreviation of the American Water Works Association that publish its first consensus documents in . Nowadays there are 180 AWWA standards covering nearly all areas of water treatment and supply, such as water sourcing, water storage, treatment, and distribution, etc. More specifically, the AWWA regulates the materials, equipment, and practices used in water treatment and supply, including valve production.
Both the AWWA and ANSI have thorough standards for flanges of gate valves, but there are differences: ANSI is aimed at industrial flange installations while the AWWA standard focuses on the flange for potable water. Besides, the ANSI includes the welded auxiliary connections information while the AWWA doesn&#;t address those installations.
When we talk about gate valve types, the AWWA C515 and the AWWA C509 are two important parameters. What do they mean?
AWWA C509 Standard: It was developed in and is based on the physical characteristics of cast iron. It regulates the design standard for resilient seat valves for water and wastewater, especially the wall thickness of the valve body.
AWWA C515 standard: This standard is based on the more robust physical characteristics of ductile iron.
As a professional valve manufacturer, the AWWA standard gate valve is our main product.
For more information, please click:
https://www.watersvalve.com/product-category/gate-valves/
For more information, please visit DIN Standard Check Valves.