FLUORINE LINED SOFT SEAL BUTTERFLY VALVE
OVERVIEW
The butterfly valve, also called the flap valve, is a common flow control valve in industry and civil life. It is often used for the switch control of low-pressure pipelines. The butterfly valve is a valve that uses a disc-shaped opening and closing part (butterfly plate) to reciprocate about 90° to open, close or adjust the flow of the medium. The butterfly valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a role of cutting off and throttling on the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.
STRUCTURAL FEATURES
The butterfly valve has the characteristics of simple structure, small size, light weight, low material consumption, small installation size, fast switching, 90° reciprocating rotation, and small driving torque. It is used to cut off, connect, and adjust the medium in the pipeline, and has good fluid control characteristics and closing and sealing performance.
Butterfly valves can transport mud with minimal liquid accumulation at the pipe opening. Good sealing can be achieved under low pressure. Good adjustment performance.
The streamlined design of the butterfly plate reduces fluid resistance loss, making it an energy-saving product.
The valve stem is a through-stem structure, which has been tempered and has good comprehensive mechanical properties, corrosion resistance and abrasion resistance. When the butterfly valve is opened and closed, the valve stem only rotates but does not move up and down. The packing of the valve stem is not easy to be damaged and the seal is reliable. It is fixed with the cone pin of the butterfly plate, and the extended end is designed to prevent the valve stem from collapsing when the connection between the valve stem and the butterfly plate is accidentally broken.
The connection modes include flange connection, wafer connection, butt welding connection and lug wafer connection. The drive modes include manual, worm gear drive, electric, pneumatic, hydraulic, electro-hydraulic linkage and other actuators, which can realize remote control and automatic operation.
CLASSIFICATIONS
According to the driving mode of the butterfly valve, the butterfly valve is divided into electric butterfly valve, pneumatic butterfly valve, hydraulic butterfly valve and manual butterfly valve. According to the difference in structural type, the butterfly valve is divided into centerline butterfly valve, single eccentric butterfly valve, double eccentric butterfly valve and triple eccentric butterfly valve.
1. Centerline butterfly valve: The valve stem axis, butterfly plate center and body center of the centerline butterfly valve are in the same position, with simple structure and convenient manufacturing. Common rubber lined butterfly valves belong to this category. Because the butterfly plate and the valve seat are always in a state of extrusion and scraping, the resistance distance is large and the wear is fast.
2. Single eccentric butterfly valve: In order to solve the extrusion problem of the butterfly plate and the valve seat of the concentric butterfly valve, a single eccentric butterfly valve was produced. Its structural feature is that the valve stem axis deviates from the center of the butterfly plate, so that the upper and lower ends of the butterfly plate no longer become the rotation axis, dispersed, and reduced the excessive extrusion of the upper and lower ends of the butterfly plate and the valve seat. Since the rotation center of the butterfly plate (i.e. the valve shaft center) and the butterfly plat.e sealing cross-section are set eccentrically, the butterfly plate sealing surface gradually separates from the valve seat sealing surface during the opening process of the butterfly valve. When the butterfly plate rotates to 20°~25°, the butterfly plate sealing surface completely separates from the valve seat sealing surface. When the butterfly plate is fully opened, a gap is formed between the two sealing surfaces. As a result, the relative mechanical wear and extrusion between the two sealing surfaces are greatly reduced during the opening and closing process of the butterfly valve, thereby ensuring the sealing of the butterfly valve.
Sealing structure of single eccentric sealing butterfly valve
3. The double eccentric butterfly valve, which is the most widely used one, is further improved on the basis of the single eccentric butterfly valve. Its structural feature is that the valve stem axis deviates from both the center of the butterfly plate and the center of the body. The double eccentric effect enables the butterfly plate to quickly separate from the valve seat after the valve is opened, greatly eliminating the unnecessary excessive extrusion and scraping between the butterfly plate and the valve seat, reducing the opening resistance, reducing wear, and increasing the life of the valve seat. Since the rotation center of the butterfly plate (i.e. the valve axis center) and the center line of the valve body are offset in size on the basis of the single eccentric butterfly valve, the sealing surface of the butterfly plate will separate from the valve seat sealing surface faster than the single eccentric sealing butterfly valve during the opening process of the butterfly valve. When the butterfly plate rotates to 8°~12°, the sealing surface of the butterfly plate completely separates from the valve seat seal. When it is fully opened, a larger gap is formed between the two sealing surfaces. The design of this type of butterfly valve greatly reduces the mechanical wear and crowding and pressure deformation between the two sealing surfaces, and improves the sealing performance of the butterfly valve.
Sealing structure of double eccentric sealing butterfly valve
4. To achieve high temperature resistance, metal seals must be used, but the leakage is large; to achieve zero leakage, soft seals must be used, but they are not resistant to high temperature. In order to overcome this contradiction of the double eccentric butterfly valve, the butterfly valve was eccentric for the third time. The so-called third eccentricity means that the shape of the sealing pair is not a positive cone, but an oblique cone.
Because the center line of the valve seat is offset from the center line of the valve body on the basis of the double eccentric butterfly valve, the sealing surface of the butterfly plate will immediately separate from the sealing surface of the valve seat at the moment of opening during the opening process of the butterfly valve, and will only contact and press the sealing surface of the valve seat at the moment of closing. When fully opened, a gap is formed between the two sealing surfaces, which is the same as that of the double eccentric sealing butterfly valve. The design of this type of butterfly valve completely eliminates the mechanical wear and abrasion between the two sealing surfaces, greatly improving the sealing performance and service life of the butterfly valve.
BASIC TECHNICAL PARAMETERS
Valve type: butterfly valve
Drive mode: manual/electric/pneumatic/turbine drive
Connection type: flange/wafer/welded
Structural type: single eccentric/double eccentric/triple eccentric
Seal type: soft seal/metal seal
Nominal pressure: 16MPA, etc.
Nominal diameter: 10~5000mm
Valve body material: cast steel/stainless steel, etc.
Applicable temperature range, etc.
APPLICATIONS
Butterfly valves are suitable for fresh water, sewage, seawater, salt water, steam, natural gas, food, medicine, oil products, various acids and alkalis and other pipelines that require complete sealing, zero gas test leakage, high life requirements, and working temperatures between -10 degrees and 150 degrees.
Soft-sealed eccentric butterfly valves are suitable for two-way opening and closing and regulation of ventilation and dust removal pipelines, and are widely used in gas pipelines and waterways in metallurgy, light industry, electricity, and petrochemical systems. Metal-to-metal wire-sealed double-eccentric butterfly valves are suitable for urban heating, gas supply, water supply and other gas, oil, acid and alkali pipelines as regulating and throttling devices
In addition to being used as program control valves for large-scale pressure swing adsorption (PSA) gas separation devices, metal-to-metal face-sealed triple-eccentric butterfly valves can also be widely used in petroleum, petrochemical, chemical, metallurgy, electricity and other fields.
PRODUCT DISPLAY
VALVE INTERNAL COMPONENT MATERIALS
Main methods of hardening treatment
Commonly used valve internal component materials are SUS304, SUS316, SUS316L, SUS410, SUS420, etc., and are processed accordingly according to different fluid conditions. For controlling cavitation fluids, fluids containing solid particles, and high-temperature and high-pressure situations, they must be hardened. treatment to extend the service life of the valve.
Heat treatment
a.304/316 solid solution treatment
This series of materials is austenitic stainless steel and is mainly used in working conditions where the medium is corrosive or in low-temperature situations. When the medium is highly corrosive, solution treatment must be carried out. The purpose of solution treatment is to improve the hardness and corrosion resistance of the material.
Temperature range -196~530°C
b.410/420 quenching and tempering treatment (quenching + tempering)
The material of this series is martensitic stainless steel, which is an excellent cavitation-resistant material. It must be quenched and tempered when used in high-temperature and high-pressure difference situations. The purpose of quenching and tempering treatment is to greatly improve the hardness of the material and extend its service life under harsh working conditions.
Temperature range -45~425°C
c.17-4PH precipitation hardening treatment
Different types and quantities of strengthening elements are added to the chemical composition of stainless steel, and different types and quantities of carbides, nitrides, carbides and intermetallic compounds are precipitated through the precipitation hardening process, which not only improves the strength of the steel but maintains sufficient toughness. A type of high-strength stainless steel, referred to as precipitation hardening.
Temperature range -45~425°C
Surface hardening treatment
Surface heat treatment is divided into two categories: surface quenching and surface chemical heat treatment.
a. Flame heating surface quenching, contact electric heating surface quenching, induction heating surface quenching, etc.
b. Carburizing, nitriding, carbonitriding, chromium boronizing, copper infiltrating, etc.
Surfacing treatment
Stellite cladding (main components Co, Cr, W) is a commonly used hardening treatment method with excellent corrosion resistance. There are two methods of Stellite surfacing: full surfacing and partial surfacing. There is no standard regulation for the specific surfacing method. It usually depends on the different pressures and temperatures of the fluid and whether the fluid contains particles.
PACKAGING PROTECTION MEASURES
Packaging structure and materials
The packaging should be designed to be both strong and lightweight to withstand various pressures and impacts during transportation. The materials used should have good weather resistance, chemical resistance and wear resistance to adapt to different transportation environments.
Sealing and leak-proof
The packaging adopts reliable sealing technology, such as heat sealing, glue sealing or the use of sealing rings, to ensure the air tightness and liquid tightness of the packaging.
Easy to handle and identify
The size and weight of the packaging conform to ergonomic principles, ensuring safe and convenient handling for handlers. At the same time, the packaging clearly indicates the cargo information, such as name, weight, and destination, for quick identification and classification.
Special cargo identification
For special goods, such as flammable, explosive, toxic, corrosive or radioactive substances, the corresponding dangerous goods label must be affixed to the packaging.
Dangerous goods packaging specifications
For special goods, such as flammable, explosive, toxic, corrosive or radioactive substances, the corresponding dangerous goods label must be affixed to the packaging.
Certification
COMPANY OVERVIEW
Our company is located in Zhongbei Industrial Park, Xiqing District, Tianjin. It is a professional company integrating mechatronics, including design and development, production and assembly, sales and service of electric actuators and valve products.
The production base covers an area of 2,000 square meters
ENTERPRISE QUALITY INSPECTION QC PROCESS
01. Internal Testing
Check the sight glass and pointer for alignment.
Check the wiring for proper alignment.
Check the open and close limit cams for full engagement.
Check the pointer for full engagement.
Check the pointer position for alignment with the electric actuator.
Check the internal screws for tightness.
02. Appearance Inspection
Check for paint peeling/stains
Manual wrench
Waterproof connector
Manual dust plug
03. Product Type
Is the voltage consistent with the product foam box marking?
Is the control type consistent with the product foam box marking?
04.Marking
Use laser marking machine to mark product number
INSPECTION ITEMS FOR COMPLETE VALVE SETS
01. According to the information on the production order, check whether the following contents are consistent with the production order
Valve quantity
Valve diameter
Valve material
Valve connection method
Valve pressure
Actuator voltage
Actuator control type
Is the actuator explosion-proof?
02. Check the fastening screws
Check whether the screws between the valve and the electric actuator are tightened or not.
STANDARDIZED SAFETY PRODUCTION PROCESS IN THE WORKSHOP
Arrange
Remove and organize unwanted items, free up space, utilize space flexibly, prevent misuse and misplacement, and shape the overall workplace.
Organize
Locate and mark the items you need, organize them, make the workplace clear at a glance, create a tidy work environment, and shorten the time it takes to find items.
Cleaning
Maintain a clean, tidy, pleasant working environment, stable quality, and reduce industrial accumulation.
Tidy
Maintain previous 3S results, clean, maintain 3S results, and leave a good impression on customers.
Quality
Develop good habits and qualities of abiding by regulations, cultivate good habits of employees who abide by the rules, and create a team spirit.
THE STATUS AND ROLE OF 5S
1. Improve corporate image
2. Improve productivity and work efficiency
3. Improve production turnover
4. Reduce failures and ensure quality
5. Strengthen safety and reduce potential safety hazards
FAQ
How about your price?
Although high quality but the price is vary favorable.
What's your MOQ?
One piece.
What is the delivery time?
It is about 2-4 weeks after we receive the payment.
Do you have products in stock?
Yes, some stock can be shipped out within 3 days.
Do you test all your goods before delivery?
Yes, all products are fully inspected before delivery.
What is the warranty?
Our warranty is one year. After you receive the goods, if you find defect products, just take pics or videos to send us. We will re-make it for re-fund them to customers once we confirm it is our responsibilities.
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