Butterfly valve development history, definition and specification parameters:
1930s, the United States invented the butterfly valve, the 1950s brought to Japan, the 1960s was widely used in Japan, while in China it is a matter of promotion of the 70s. At present, butterfly valves in the world generally have been replaced by DN300 mm butterfly valves. Compared with the gate valve, the butterfly valve has a short opening and closing time, a small operation, a small installation space and a light weight. Taking DN1000 as an example, the butterfly valve is about 2T , and the gate valve is about 3.5T . The butterfly valve is easy to combine with various driving devices, and has good durability and reliability ......
Butterfly valve model and standard:
Product adoption standard: JB/T8527-97
Flange connection size: GB9113.1-9113.26-88 integral steel pipe flange;
GB9115.1-9115.36-88 butt welded steel pipe flange;
Structure length: GB/T5188.2-94 the length of the structure of the clip-on connecting valve ......
Flange connection size: GB9113.1-9113.26-88 integral steel pipe flange;
GB9115.1-9115.36-88 butt welded steel pipe flange;
Structure length: GB/T5188.2-94 the length of the structure of the clip-on connecting valve ......
The principle, structural characteristics and application range of the butterfly valve:
The butterfly valve has the characteristics of simple structure, small volume, light weight, material consumption, small installation size, rapid switch, 90° reciprocating rotation, small driving torque, etc. It is used to cut off, connect and adjust the medium in the pipeline. Fluid control characteristics and shut-off sealing performance. When the butterfly valve is in the fully open position, the thickness of the disc is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. The butterfly valve has two sealing types: elastic seal and metal seal ...
Classification of butterfly valves:
1 . Classified by structure
(1) Center sealing butterfly valve
(2) Single eccentric sealing butterfly valve
(3) Double eccentric sealing butterfly valve ......
(1) Center sealing butterfly valve
(2) Single eccentric sealing butterfly valve
(3) Double eccentric sealing butterfly valve ......
The advantages and disadvantages of the butterfly valve:
Butterfly valve advantages
1. Easy and quick opening and closing, labor saving, small fluid resistance, and can be operated frequently.
2 , simple structure, small size and light weight.
3 , can transport mud, accumulate liquid in the pipe mouth zui less ...
1. Easy and quick opening and closing, labor saving, small fluid resistance, and can be operated frequently.
2 , simple structure, small size and light weight.
3 , can transport mud, accumulate liquid in the pipe mouth zui less ...
 Butterfly valve installation and maintenance precautions:
Installation and use precautions:
1. Before installation, check whether the specifications, pressure, temperature and corrosion resistance of the butterfly valve meet the requirements for use. The parts should be inspected for damage or looseness.
2 , the butterfly valve can be installed on the pipe at any angle, should be closed to install; when welding the pipe flange should be the valve seal ...
1. Before installation, check whether the specifications, pressure, temperature and corrosion resistance of the butterfly valve meet the requirements for use. The parts should be inspected for damage or looseness.
2 , the butterfly valve can be installed on the pipe at any angle, should be closed to install; when welding the pipe flange should be the valve seal ...
Butterfly valve failures and elimination methods Installation and use precautions
1. Before installation, check whether the specifications, pressure, temperature and corrosion resistance of the butterfly valve meet the requirements for use. The parts should be inspected for damage or looseness.
2 , the butterfly valve can be installed on the pipe at any angle, should be closed to install; when welding the pipe flange should be the valve seal ...
1. Before installation, check whether the specifications, pressure, temperature and corrosion resistance of the butterfly valve meet the requirements for use. The parts should be inspected for damage or looseness.
2 , the butterfly valve can be installed on the pipe at any angle, should be closed to install; when welding the pipe flange should be the valve seal ...
Butterfly valve installation and maintenance instructions:
1. Do not store wet warehouses and open spaces after opening the butterfly valve packaging, and do not store them on a messy construction site.
2. The connection on the pipe should be adjusted before installation.
3 , the fluid passing through the pipeline does not contain hard particles, so as not to damage the sealing surface.
4. The inner cavity and sealing surface of the pipe should be cleaned during installation ...
2. The connection on the pipe should be adjusted before installation.
3 , the fluid passing through the pipeline does not contain hard particles, so as not to damage the sealing surface.
4. The inner cavity and sealing surface of the pipe should be cleaned during installation ...
Butterfly valve torque:
Torque is the rotational force required to operate the valve. This rotational force on the butterfly valve depends on three factors: (1) friction between the valve flap and the seat seal; (2) bearing friction; (3) dynamic torque.
The small starting torque of zui is the sum of the bearing friction and the torque generated by the seat / valve interference friction under a certain pressure difference . This value is usually the large value of the torque required to operate the valve and is used to determine the actuator selection ...
The small starting torque of zui is the sum of the bearing friction and the torque generated by the seat / valve interference friction under a certain pressure difference . This value is usually the large value of the torque required to operate the valve and is used to determine the actuator selection ...
The use of butterfly valve in different working conditions:
Due to the wiping nature of the butterfly valve plate, most butterfly valves can be used for media with suspended solid particles and can be used for powdered and granular media depending on the strength of the seal.
The butterfly valve has a small structural length and overall height, and has a fast opening and closing speed. When fully opened, it has a small fluid resistance. When it is opened to between about 15° and 70° , it can perform sensitive flow control ...
The butterfly valve has a small structural length and overall height, and has a fast opening and closing speed. When fully opened, it has a small fluid resistance. When it is opened to between about 15° and 70° , it can perform sensitive flow control ...
Butterfly valve opening and closing:
The relationship between the opening of the butterfly valve and the flow rate changes substantially linearly. If it is used to control the flow, its flow characteristics are closely related to the flow resistance of the piping. For example, the diameters and forms of the two pipe installation valves are all the same, and the pipe loss coefficient is different, and the valve flow difference is also large.  If the valve is in a state of large throttle, the back of the valve plate is prone to cavitation, and there is a possibility of damage to the valve. Generally , it is used outside 15° ...
Development, characteristics and application of three eccentric butterfly valves:
Since its inception, the three-eccentric disc valve has undergone a process of self-improvement and continuous development in order to meet the increasingly severe working conditions. Even Zui's basic zero leakage, theoretically three eccentric disc valves can be achieved, but in fact depends on careful design and precision manufacturing. Based on the advantages and disadvantages of other brands of three eccentric disc valves, Badie Valve Co., Ltd. has launched its own unique three-eccentric disc valve tritec...
Problems with the use of triple eccentric metal hard seal butterfly valves:
1. Since the multi-layer soft and hard stack sealing ring is fixed on the valve plate, when the valve plate is normally open, the medium forms a front surface flushing on the sealing surface thereof, and the soft sealing band in the metal sheet interlayer is directly washed to affect the sealing performance.
Second, limited by structural conditions The structure is not suitable for valves with a diameter below DN200 , because the overall structure of the valve plate is too thick and the flow resistance is large.
Third, due to the principle of the three eccentric structure, the seal between the sealing surface of the valve plate and the valve seat is the torque of the transmission device ......
Second, limited by structural conditions The structure is not suitable for valves with a diameter below DN200 , because the overall structure of the valve plate is too thick and the flow resistance is large.
Third, due to the principle of the three eccentric structure, the seal between the sealing surface of the valve plate and the valve seat is the torque of the transmission device ......
Factors to consider when choosing a butterfly valve:
Service life: When the butterfly valve is used more than 10,000 times, it can still guarantee “ airtight †when it is closed .
Pressure drop: If the pressure drop is too large, it will increase energy consumption. However, it should be understood that the valve is not the only factor in the pressure drop of the piping system, and the following factors are caused by the pressure drop. The fluid section of the pipe. The friction of the inner wall of the pipe.
Versatility: The butterfly valve controls and regulates the piping system by opening/closing and throttling/balancing ...
Pressure drop: If the pressure drop is too large, it will increase energy consumption. However, it should be understood that the valve is not the only factor in the pressure drop of the piping system, and the following factors are caused by the pressure drop. The fluid section of the pipe. The friction of the inner wall of the pipe.
Versatility: The butterfly valve controls and regulates the piping system by opening/closing and throttling/balancing ...
The characteristics and working principle of the signal butterfly valve:
1. Small and light, easy to disassemble and repair, and can be installed at any position.
2 , the structure is simple and compact, and the 90° rotation opens and closes quickly.
3 , the operating torque is small, labor-saving and light.
4 , to achieve complete sealing, gas test leakage is zero ......
2 , the structure is simple and compact, and the 90° rotation opens and closes quickly.
3 , the operating torque is small, labor-saving and light.
4 , to achieve complete sealing, gas test leakage is zero ......
Signal butterfly valve use precautions:
1. The butterfly valve can be installed on the pipeline at any position in the space.
2 , the butterfly valve installation position should ensure the convenience of use, repair and replacement.
3. When the butterfly valve is installed, the direction of the flow of the pipeline medium can be ignored, that is, the two-way flow is allowed.
4 , the butterfly valve should be stored in the indoor dry place before installation, the valve plate is slightly open 4 ° ~ 5 °......
2 , the butterfly valve installation position should ensure the convenience of use, repair and replacement.
3. When the butterfly valve is installed, the direction of the flow of the pipeline medium can be ignored, that is, the two-way flow is allowed.
4 , the butterfly valve should be stored in the indoor dry place before installation, the valve plate is slightly open 4 ° ~ 5 °......
Butterfly valve sealing principle:
1. Sealing principle of single eccentric sealing disc valve
2 , double eccentric sealing butterfly valve sealing principle
Since the center of rotation of the disc (both the center of the valve shaft) and the center line of the valve body are dimensioned b offset on the basis of the single eccentric butterfly valve , the sealing surface of the butterfly plate will be faster than the single eccentric sealing butterfly valve during the opening process of the butterfly valve. Ground off the seat sealing surface ...
2 , double eccentric sealing butterfly valve sealing principle
Since the center of rotation of the disc (both the center of the valve shaft) and the center line of the valve body are dimensioned b offset on the basis of the single eccentric butterfly valve , the sealing surface of the butterfly plate will be faster than the single eccentric sealing butterfly valve during the opening process of the butterfly valve. Ground off the seat sealing surface ...
Looking at the development of butterfly valves from the internal structure:
First, concentric butterfly valve
The stem center of the concentric butterfly valve, the center of the disc, and the center of the valve body are at the same position. The structure is simple and convenient to manufacture, and the common rubber-lined butterfly valves now belong to such a structure. Its disadvantage is that the butterfly plate and the valve seat are always in a state of being squeezed, scraped, large in resistance and fast in wear. It is also because of these shortcomings that the butterfly valves of such structures are basically made of flexible rubber or fluoroplastic soft seals ...
The stem center of the concentric butterfly valve, the center of the disc, and the center of the valve body are at the same position. The structure is simple and convenient to manufacture, and the common rubber-lined butterfly valves now belong to such a structure. Its disadvantage is that the butterfly plate and the valve seat are always in a state of being squeezed, scraped, large in resistance and fast in wear. It is also because of these shortcomings that the butterfly valves of such structures are basically made of flexible rubber or fluoroplastic soft seals ...
company profile
BRIEF INTRODUCTION
Guangzhou AoCun Valve Manufacturing Co., Ltd. (formerly known as Guangzhou Grundfos Valve Factory), headquartered in Guangzhou, is a fluid control company integrating research, production, sales and technical services of valves. Its products and services are in chemical, petrochemical, petroleum, The market in the fields of papermaking, mining, electric power, liquefied petroleum gas, food, pharmaceutical, water supply and drainage, etc.
The main products are: regulating valves, butterfly valves, globe valves, ball valves, check valves, valve, steam trap, plug valves, hydraulic control valves, solenoid valves, balancing valves, filters, flame arrester, breather valve, insulation valves, Imported valves, etc.
BRIEF INTRODUCTION
Guangzhou AoCun Valve Manufacturing Co., Ltd. (formerly known as Guangzhou Grundfos Valve Factory), headquartered in Guangzhou, is a fluid control company integrating research, production, sales and technical services of valves. Its products and services are in chemical, petrochemical, petroleum, The market in the fields of papermaking, mining, electric power, liquefied petroleum gas, food, pharmaceutical, water supply and drainage, etc.
The main products are: regulating valves, butterfly valves, globe valves, ball valves, check valves, valve, steam trap, plug valves, hydraulic control valves, solenoid valves, balancing valves, filters, flame arrester, breather valve, insulation valves, Imported valves, etc.
The company actively carries out foreign exchanges and cooperation. It is the general agent of German Lek (LIK) valves, and sells Japanese KITZ (Beize) valves, Japan VENN (Valley) valves, and US LEO (Liwo) valves;
The company has always adhered to the "integrity*, quality fundamentals" for the purpose, products and services won the trust of users and extensive praise.
Guangzhou Ao Village Valve Manufacturing Co., Ltd. sincerely welcomes your cooperation !
Guangzhou aocun valve co.,ltd(formerly Guangzhou gelanfu valve factory),headquartered in Guangzhou,set valve research and development production,sales and technical service in one of the fluid control business,itsproducts and services in chemical,petrochemical,petroleum,paper, Mining,electricty,gas,food,pharmaceutical,water supply and drainage areas of the marketleader.
Our main products are:valve,butterfly valve,globe valve,ball valve,check valve,gate valve,trap,plug,hydraulic control valves,solenoid valve,balance valve,filter,flame arrester,breathing valve,insulation valves and other imports.
The company has actively conducted exchanges and cooperation, the German LIK valve distributor in China, and sales agent in Japan KITZ valves, Japan VENN valve, YSA LEO valve.
Companies always uphold the "integrity first, quality basic" for the purpose, products and services are trusted by users and the widespread praise.
The company has always adhered to the "integrity*, quality fundamentals" for the purpose, products and services won the trust of users and extensive praise.
Guangzhou Ao Village Valve Manufacturing Co., Ltd. sincerely welcomes your cooperation !
Guangzhou aocun valve co.,ltd(formerly Guangzhou gelanfu valve factory),headquartered in Guangzhou,set valve research and development production,sales and technical service in one of the fluid control business,itsproducts and services in chemical,petrochemical,petroleum,paper, Mining,electricty,gas,food,pharmaceutical,water supply and drainage areas of the marketleader.
Our main products are:valve,butterfly valve,globe valve,ball valve,check valve,gate valve,trap,plug,hydraulic control valves,solenoid valve,balance valve,filter,flame arrester,breathing valve,insulation valves and other imports.
The company has actively conducted exchanges and cooperation, the German LIK valve distributor in China, and sales agent in Japan KITZ valves, Japan VENN valve, YSA LEO valve.
Companies always uphold the "integrity first, quality basic" for the purpose, products and services are trusted by users and the widespread praise.
Guangzhou aocun valve co.,ltd sincerely welcome your cooperation!
Welcome, order!
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: :okm222@Address: Guangzhou Huangpu Industrial Zone
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