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A butterfly valve is a disc-shaped valve whose closing part (valve disc or butterfly plate) rotates around the valve shaft to open and close. It is mainly used for cutting off and throttling on pipelines. The following are some key features and applications of butterfly valves:
Simple structure: The butterfly valve consists of a valve body, a valve stem, a butterfly plate and a sealing ring. It has a simple structure, small size and light weight.
Easy to operate: The angle from full opening to full closing of the butterfly valve is usually less than 90°, and it opens and closes quickly, is easy to operate, and has a small driving torque.
Good fluid control characteristics: Butterfly valves are mainly used to cut off, distribute and change the flow direction of the medium on the pipeline, and have good flow control characteristics.
Sealing performance: Butterfly valves have two sealing types: elastic sealing and metal sealing. The sealing ring of the elastic sealing valve can be embedded in the valve body or attached to the periphery of the butterfly plate.
Wide application: Butterfly valves are widely used in petroleum, chemical, metallurgy, hydropower and other fields, and are suitable for a variety of media, including water, oil, gas, water-solid two-phase and gas-solid two-phase flow.
Temperature and pressure range: Butterfly valves can be used in different temperature and pressure ranges, and are suitable for a variety of working conditions from low temperature to high temperature, low pressure to high pressure.
Various connection methods: The connection methods of butterfly valves include flange connection, clamp connection, butt welding connection and lug clamp connection.
Drive mode: The drive mode of butterfly valves can be manual, electric, pneumatic, hydraulic, electro-hydraulic linkage, etc., which can realize remote control and automatic operation.
Suitable for large-diameter valves: The structural principle of butterfly valves is particularly suitable for making large-diameter valves, with small flow resistance and good adjustment performance.
Special design: For special working conditions, such as high temperature, high pressure, strong corrosion and other conditions, butterfly valves have special designs, such as three-eccentric metal hard seal butterfly valves, to meet different industrial application requirements.
Butterfly valves play an important role in the field of industrial automation control due to their simple structure, convenient operation and good fluid control characteristics.
Changzhou Xinneng Automatic Control Equipment Co., Ltd is a technology-based enterprise specializing in research, development, production, sales, and service of various electric actuators, valves, and automatic control systems. As a China Custom Clamp Butterfly Valve Suppliers and Clamp Butterfly Valve Manufacturers, annual production and sales of electric valve actuators of more than 10,000 sets. In 2006 through the IS09001 quality management system certification, and obtained the national "productflame-proof certification", "explosion-proof the national industrial product production permit" issued by the National Center for AnBiao "mining productssafety sign certificate", and in cooperation with the district technology bureau established the engineering research center for intelligent digital electric actuators, 16 patent for utility model.
The company product series is complete, the actuator product has the common type, the whole type, the adjustment type, the intelligent type, the explosion-proof type BT4, CT4, MA mining type, and so on. The AUKEMA intelligent electric actuator has reached the international level, with better control than imported products, and is closer to the actual needs of the domestic market.
The company is committed to product type optimization and qualitmprovement, combined with the market demand, developed a special electric valve for coal mines, the application of thousands of major coal mining groups in the mine, improved the level of coal mine automation; Environmental protection desulfurization and off-sale electric valve is widely used in the field of power stations, contributing to environmental protection. Okuma explosion-proof series BT4, CT4 electric valve is the priority brand of oil, petrochemical, natural gas, gas, and other flameproof fields. In addition, many supporting products in metallurgy, water treatment, electric power, shipbuilding, fire, and other fields, users - praise. In recent years, the company increased the development of overseas markets, products are exported to Indonesia, Pakistan, Singapore, Nigeria, Malaysia, and other countries.
Enterprises adhering to desirable product quality will occupy the market, tread the industry with advanced science and technology, improve the service system to return the customer's purpose and strive to become a flow of valve actuator manufacturing enterprises.
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Read MoreThe working pressure and temperature range of a clamp-on butterfly valve will vary depending on its design, material and manufacturing standards. Generally speaking, the working pressure and temperature range of a clamp-on butterfly valve are as follows:
Working pressure:
Clamp-on butterfly valves are usually suitable for medium and low pressure applications, and their working pressure is generally between 1.0 MPa and 1.6 MPa (i.e. 10 to 16 bar).
For some specially designed valves, the working pressure may be as high as 2.5 MPa or higher, but this is rare.
Working temperature:
The temperature range of a clamp-on butterfly valve is usually between -10°C and +80°C, suitable for common neutral media such as water and gas.
For high temperature resistant materials (such as high temperature resistant plastics, metal alloys, etc.), the working temperature can reach +150°C to +200°C, or even higher, but this will vary depending on the specific valve material and the choice of sealing ring.
Influencing factors:
Material selection: The difference in valve body and sealing materials determines the temperature and pressure adaptability range of the valve. For example, different materials such as stainless steel, cast iron, and aluminum alloy have different pressure and temperature resistance.
Sealing material: The sealing ring material of the clamp-on butterfly valve (such as EPDM, NBR, Viton, etc.) will affect the temperature adaptability range of the valve. High-temperature resistant sealing materials need to be selected in high-temperature environments.
Choosing a suitable clamp-on butterfly valve according to the pipe size mainly involves the following key factors:
1. Matching the inner diameter of the pipe (DN) with the valve size (D)
The size of the valve should match the inner diameter (DN, nominal diameter) of the pipe. The size of the butterfly valve is usually consistent with the inner diameter of the pipe. When selecting, ensure that the diameter of the valve matches the size of the pipe. For example, a DN50 pipe should choose a DN50 clamp-on butterfly valve.
In general, the valve size will be slightly larger than the inner diameter of the pipe to ensure that the fluid can pass smoothly.
2. Flow demand
When selecting a valve, it is necessary to consider the flow demand of the fluid in the pipe. For pipelines with different flow requirements, you may need to choose butterfly valves with different flow control capabilities.
Clamp-on butterfly valves have flow control functions, and the flow rate can be adjusted by adjusting the opening of the valve. It is necessary to select the appropriate butterfly valve size according to the flow rate and use requirements of the fluid in the pipeline.
3. Pipeline pressure level
Choose the appropriate valve pressure level according to the working pressure of the pipeline. Clamp-on butterfly valves of different sizes have different pressure adaptation ranges. When selecting, make sure that the pressure level of the valve is not lower than the maximum working pressure of the pipeline.
If the working pressure of the pipeline is high (such as more than 1.6 MPa), you need to choose a butterfly valve designed to withstand higher pressure.
4. Fluid properties
Choose appropriate valve materials and sealing materials according to the properties of the fluid (such as water, gas, chemical liquid, etc.). The corrosiveness, viscosity and temperature of the fluid will affect the type of valve selected.
For example, corrosive or high-temperature media may require the selection of corrosion-resistant and high-temperature resistant materials, such as stainless steel butterfly valves or butterfly valves with special sealing rings.
5. Pipeline connection method
Clamp-on butterfly valves are usually suitable for non-welded pipeline connections, so make sure that the connection method of the selected butterfly valve matches the pipeline system.
Common connection methods for clamped butterfly valves include clamping connection (fixed by clamps or bolts) and flange connection. When selecting, it is necessary to consider whether the connection methods of the valve and the pipeline are consistent.
6. Operating temperature range
The sealing material of the clamped butterfly valve has certain temperature restrictions. When selecting, it is necessary to ensure that the operating temperature range of the valve meets the temperature requirements of the pipeline fluid.
For example, if the fluid temperature in the pipeline is high, it may be necessary to use high-temperature resistant sealing materials such as Viton or PTFE.
7. Installation space and maintainability
When selecting a butterfly valve, it is also necessary to consider the installation space of the pipeline and the maintainability of the valve. Clamped butterfly valves are usually easier to install and disassemble, and are suitable for systems that require frequent maintenance or replacement.
Ensure that the valve is installed in an appropriate position for future maintenance and replacement.
Summary of selection steps:
Confirm the pipeline size (DN) and select the matching butterfly valve size.
Calculate the flow demand and select a butterfly valve suitable for flow regulation.
Evaluate the pressure of the pipeline to ensure that the pressure level of the valve meets the requirements.
Analyze the fluid characteristics and select the appropriate material and sealing material.
Consider the installation method and choose a butterfly valve that is suitable for the pipe connection method.
Consider the operating temperature and choose a butterfly valve that is suitable for temperature resistance.
Evaluate the installation and maintenance requirements to ensure that the valve is easy to maintain.
Example:
If you have a DN100 water pipe, the working pressure is 1.0 MPa, the temperature is room temperature, and the flow rate is medium, choose a DN100 clamp-type butterfly valve, the material can be cast iron or stainless steel, the sealing material is EPDM or NBR, and ensure that the pressure level of the valve meets the requirements of 1.0 MPa.
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