D71X-10s Plastic Butterfly Valve Acid and Basic

• Media: Acid-Basicity
• Driving Mode: Electric
• Connection Form: Flange
• Structure: Three-Eccentric Sealing
• Seal Form: Supercharging Pressured Sealed
• Valve Stem: Normal
• Model NO.: D71X-10S
• Work Pressure: Mid-Pressure (2.5mpa< Pn <6.4mpa)
• Working Temperature: Medium Temperature (120°C<T<450°C)
• Material of Seal Surface: Metal Hard Sealed
• Valve Body: Sheet Metal
• Standard: Sanitary Grade
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Transport Package: Wooden Box
• Specification: DN50-DN2400
• Trademark: xc
• Origin: China
• HS Code: 8481804090
• Production Capacity: 10000

Product Description

Plastic butterfly valve is also called flap valve, is a simple structure of the control valve, can be used for the switch control of low-pressure pipeline media butterfly valve refers to the closing part (valve disc or butterfly plate) for the disc, revolving around the valve shaft to achieve the opening and closing of a valve. The 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 the role of cutting off and throttling on the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate, rotating around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjusting.
Working principle of plastic butterfly valve
The plastic butterfly valve is a kind of valve that is used to open, close or adjust the medium flow by rotating about 90° with the disc type opening and closing parts. The butterfly valve is not only simple in structure, small in size, light in weight, saving in material consumption, small in installation size, small in driving torque, simple and rapid in operation, but also has good flow regulation function and closing sealing characteristics. The butterfly valve is widely used. The variety and number of its use are still continuing to expand, and to high temperature, high pressure, large caliber, high sealing, long life, excellent regulating characteristics, and a valve multi-function development. Its reliability and other performance indicators have reached a high level.
With the application of chemical corrosion resistant synthetic rubber on the butterfly valve, the performance of the butterfly valve can be improved. Because the synthetic rubber has the characteristics of corrosion resistance, erosion resistance, size stability, good resilience, easy to form, low cost, etc., and can be selected according to different requirements of the use of synthetic rubber with different properties to meet the working conditions of the butterfly valve.
Because polytetrafluoroethylene (PTFE) has strong corrosion resistance, stable performance, not easy to age, low coefficient of friction, easy to form, dimensional stability, and can improve its comprehensive performance by filling, adding appropriate materials, get better strength, lower coefficient of friction butterfly valve sealing material, to overcome the limitations of synthetic rubber, Therefore, the polymer polymer material represented by polytetrafluoroethylene and its filling modified material have been widely used in the butterfly valve, so that the performance of the butterfly valve has been further improved, and the temperature and pressure range are wider, the sealing performance is reliable, and the service life of the butterfly valve is longer.
In order to meet the requirements of high and low temperature, strong erosion, long life and other industrial applications, metal-sealed butterfly valves have been greatly developed. With the application of high temperature resistance, low temperature resistance, strong corrosion resistance, strong erosion resistance, high strength alloy materials in the butterfly valve, the metal sealed butterfly valve has been widely used in high and low temperature, strong erosion, long life and other industrial fields, there has been a large diameter (9~750mm), high pressure (42.0MPa), wide temperature range (-196~606ºC) butterfly valve, Thus, the technology of butterfly valve has reached a new level.
When the butterfly valve is fully opened, it has a small flow resistance. When opened between about 15°~70°, it can also carry out sensitive flow control, so in the field of large diameter adjustment, the application of butterfly valve is very common.
Because the movement of the butterfly valve plate is wipeable, most butterfly valves can be used in media with suspended solid particles. Depending on the strength of the seal, it can also be used for powder and granular media.
Plastic butterfly valve is suitable for what occasions
Plastic butterfly valve is suitable for flow regulation. Because the pressure loss of the butterfly valve in the pipeline is relatively large, the robustness of the butterfly plate under the pressure of the pipeline medium should also be considered when it is closed. In addition, it is also necessary to consider the limitations of the operating temperature of the elastic seat material under high temperatures. The structure length and overall height of the butterfly valve is small, the opening and closing speed is fast, and the fluid control characteristics, the structure principle of the butterfly valve is suitable for the production of large diameter valves. When the butterfly valve is required to control the flow, it is important to correctly select the size and type of the butterfly valve so that it can work properly and effectively.
Usually, in the throttling, regulating control and mud medium, the structural length is required to be short, and the opening and closing speed is fast (1/4 revolution). Low pressure cut-off (small pressure difference), butterfly valve is recommended.
In the two-position adjustment, shrinking ground channel, low noise, cavitation and gasification phenomenon, a small amount of leakage to the atmosphere, with abrasive medium, butterfly valve can be selected.
Throttle adjustment under special working conditions, or require strict sealing, or serious wear, low temperature (cryogenic) and other working conditions under the use of butterfly valve, need to use a special design of metal seal with adjustment device three eccentric or double eccentric special butterfly valve.
The butterfly valve is suitable for fresh water, sewage, sea water, salt water, steam, natural gas, food, medicine, oil and various acid and alkali and other pipelines that require complete sealing, zero gas test leakage, high life requirements, and a working temperature of -10 degrees to 150 degrees.
Soft seal eccentric butterfly valve is suitable for ventilation and dust removal pipeline bidirectional opening and closing and adjustment, widely used in metallurgy, light industry, electric power, petrochemical system of gas pipelines and waterways.
Metal to metal wire seal double eccentric butterfly valve is suitable for city heating, gas supply, water supply and other gas, oil, acid and alkali pipelines, as a regulating and throttling device.
In addition to being used as the program control valve of large pressure swing adsorption (PSA) gas separation device, the metal to metal surface sealed three eccentric butterfly valve can also be widely used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields.
What are the common failures of plastic butterfly valve
The rubber elastomer in the plastic butterfly valve will tear, wear, aging, perforation and even fall off in continuous use. And the traditional hot vulcanization process is difficult to adapt to the needs of on-site repair, repair to use special equipment, consume a lot of heat and electric energy, time-consuming and laborious. Nowadays, the polymer composite material method is gradually used to replace the traditional method, which has the adhesive force and excellent anti-wear and anti-tear performance to ensure that the service cycle is reached after repair and the downtime is shortened.
How to install and maintain plastic butterfly valve
1. When installing, the valve flap should be stopped in the closed position.
2, the opening position should be determined by the rotation Angle of the butterfly plate.
3. The butterfly valve with a bypass valve should be opened before opening.
4, should be installed according to the manufacturer's installation instructions, large weight of the butterfly valve, should set a firm foundation.
What are the key points in the construction and installation of plastic butterfly valve
1, the installation position, height, import and export direction must meet the design requirements, the connection should be firm and tight.
2, all kinds of manual valves installed on the insulation pipeline, the handle shall not be downward.
3, the valve must be inspected before installation, and the nameplate of the valve should comply with the provisions of the current GB standard "General Valve Mark" GB 12220. For the working pressure is greater than 1.0MPa and the valve that plays a cutting role on the main pipe, the strength and strict performance test should be carried out before installation, and the qualified can be used. During the strength test, the test pressure is 1.5 times the nominal pressure, the duration is not less than 5min, and the valve shell and packing should be qualified without leakage. In the tightness test, the test pressure is 1.1 times the nominal pressure; The test pressure should meet the requirements of GB 50243 standard for the duration of the test, and the valve flap sealing surface is qualified without leakage.
What are the precautions in the installation of plastic butterfly valve
Plastic butterfly valve simple structure, small size, light weight, its components are relatively few, the key several parts can form the butterfly valve, open the time is also very convenient, only need to choose the switch to 90 degrees can be, butterfly valve fluid control is very good, can increase the flow or reduce the flow at any time, valve in the transport of any fluid when there is a certain resistance, The resistance of the butterfly valve mainly comes from its own, such as the thickness of the butterfly valve body, if you want to reduce the resistance to the fluid, you only need to reduce its thickness. The elastic seal has the defect of being limited by temperature.
The application range of butterfly valve is also relatively wide, if it is used to control the flow, it is necessary to choose a different type and the size of the valve body, because the butterfly valve itself is more suitable for some valves with relatively large caliber at the time of design. Butterfly valve is not only widely used in petroleum, gas, chemical, water treatment and other general industry, but also used in the cooling water system of thermal power station.
 

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