Electric butterfly valve

Model：
Category：Electric Valve
origin：SHANGHAI

Electric butterfly valve SHANGHAI AUTOMATION INSTRUMENTATION CO. LTD. NO. 11 AUTOMATION INSTRUMENTATION FACTORY Shanghai Yi Electric Actuator SHANGYI ELECTRIC ACTUATOR SHANGYI BRAND SHANGHAI ROTORK CONTROL ACTUATOR SHANGYI ELECTRICAL ACTUATOR

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Electric butterfly valve produced by Shanghai Automation Instrumentation No. 7 factory, is an electric valve and electric control valve in a variety of electric butterfly valve connection are: flange and the folder type; electric butterfly valve seal are:. Rubber seals and metal seals Electric butterfly valves control the butterfly valve switch through the power supply signal. The product can be used as a shut-off valve for piping systems, control valves and check valves. With manual control device, once the power failure, you can temporarily operate manually, and will not affect the use.

Introduction

With the development of electric valves, to the current domestic and foreign enterprises have a lot of well-known valve production of electric valves, electric butterfly valve is the field of industrial automation and control of the important implementation of the unit. It belongs to the electric valve and electric control valve in a variety. Widely used in textile, power plants, petrochemical, heating and refrigeration, pharmaceutical, shipbuilding, metallurgy, light industry, environmental protection and other fields. The product can be used as a shut-off valve for piping systems, control valves and check valves. Complete manual control device, electric or pneumatic transmission device, to meet the specific conditions of different conditions. Meet the most stringent quality requirements, can be very durable applications. Especially in the metallurgical steel, shipbuilding industry, has a very high visibility.

The electric butterfly valve is suitable for situations where flow control is required. As the butterfly valve in the pipeline in the pressure loss is relatively large, about three times the gate valve, so the choice of butterfly valve, the pipeline system should be fully considered the impact of pressure loss, but also consider the closure of the butterfly board to withstand the pressure of the media medium Sex. In addition, the operating temperature of the elastomeric seat material at high temperatures must also be taken into account. Butterfly valve structure length and overall height is small, open and close speed, with good fluid control characteristics, butterfly valve structure of the principle of the most suitable for the production of large diameter valves. When the butterfly valve is required to control the flow of use, the most important thing is to correctly select the butterfly valve size and type, so that it can work properly and effectively. , In the throttling, regulating control and mud medium, the required length of the structure is short, fast opening and closing (1/4 turn). Low pressure cut off (small pressure), recommended the use of butterfly valve. In the two-position adjustment, necking channel, low sound, cavitation and gasification phenomenon, to the atmosphere a small amount of leakage, with abrasive media, you can use butterfly valve. Special conditions under the conditions of throttling adjustment, or require strict sealing, or wear serious, low temperature (cryogenic) and other conditions under the conditions of the use of butterfly valve, the need to use a special design of metal sealing belt adjustment device to three eccentric or double eccentric special butterfly valve The

Structural characteristics

1. In the high temperature and high pressure conditions, still has a stable sealing performance. Its special sealing system ensures high sealing performance from ultra-low temperature to ultra-high temperature in all temperature ranges

2. Three-dimensional eccentric sealing system coupled with the optimization of the design, so that the valve open resistance is small. The sealing surface of the butterfly plate is an upwardly raised conical shape, and the points on the circumferential surface of the butterfly plate are opened at the same time, and the solid material is not easily accumulated on the sealing surface. The valve closing process is done by the elastic compression of the sealing ring,

3. There is no phase card between the butterfly plate and the sealing ring.

4. The sealing performance of the valve is not affected by the temperature change.

5. Stem shaft diameter seal using graphite compression molding ring. In summary, to ensure that the zero leakage, metal seal plus the fire before, during and after the zero leakage, it is the nature of fire safety.

4, low pressure, you can achieve a good seal. 5, good regulation performance.

Butterfly valve selection

The butterfly plate of the butterfly valve is installed in the diametrical direction of the pipe. In the butterfly valve body cylindrical channel, disc-shaped butterfly plate around the axis of rotation, rotation angle of 0 ° -90 ° between, rotated to 90 °, the valve is fully open state. Butterfly valve structure is simple, small size, light weight, only a few parts from the composition. And only need to rotate 90 ° can quickly open and close, simple operation, while the valve has a good fluid control characteristics. 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. Therefore, the pressure drop produced by the valve is very small, so it has better flow control characteristics. Butterfly valve with a sealed seal and metal seal two sealed type. Elastic seal valves, seals can be embedded in the valve body or attached to the butterfly plate around. The use of metal-sealed valves generally has a longer life than elastically sealed valves, but it is difficult to achieve complete sealing. Metal seals can be adapted to higher operating temperatures, and elastomeric seals have a temperature-limited defect. If you want the butterfly valve to be used as a flow control, the main thing is to correctly select the size and type of the valve. Butterfly valve structure is particularly suitable for the production of large diameter valves. Butterfly valve not only in the oil, gas, chemicals, water treatment and other general industry is widely used, but also used in thermal power plant cooling water system. Commonly used butterfly valve has a pair of butterfly valve and flange butterfly valve two. The clip-on butterfly valve is a double-headed bolt to connect the valve between the two pipe flanges. The flanged butterfly valve is a flange with a flange connecting the flange at both ends of the valve to the pipe flange.

Features

(1) the use of double eccentric structure, with the more close the tightening of the sealing function, sealing performance and reliable.

(2) sealed sub-materials used stainless steel and nitrile oil resistant rubber pairing, long service life.

(3) rubber seals can be located on the valve body can also be located on the butterfly board, applicable to different characteristics of the media for the user to choose.

(4) butterfly plate with frame structure, high strength, over flow area, flow resistance is small.

(5) the overall paint, can effectively prevent corrosion and as long as the replacement seal seat sealing material, can be used in different media.

(6) The valve has a two-way sealing function, the installation from the media flow control, nor the impact of space position. Can be installed in any direction.

(7) with a small size, light weight, reliable performance, supporting a simple, large circulation capacity, especially for the media is more clean liquid and gas.

Electric butterfly valve Overview:

The electric butterfly valve is the perfect combination of electric actuator and butterfly valve, the same need to configure the torque to meet the international standard SIO5211 connection standard platform and each other ± 5 ° fine-tuning, and to achieve precision coordination.

Actuator, electric actuator 90 ° 120 ° 180 ° 270 ° rotation angle travel torque control is divided into switch passive contact feedback type / intelligent regulation type, special environment explosion-proof, explosion-proof type. Hard aluminum alloy shell power supply DC24v, AC220v, AC380v and other optional. Built-in overheat protection, the central feedback signal, indicator perspective window, with power emergency device protection class IP67 bottom installation size in line with ISO5211 / DIN3337 international standard to adapt to ambient temperature 8 ℃, epoxy coating. Detailed data provided by the supplier separately.

working principle

Work power is usually: AC220V, AC380V and so on. Input signal: 4 ~ 20mA 0 ~ 10v and other weak signal. By the regulation of electric actuators and stem connection debugging after a good; to power as a driving force to drive the hard seal butterfly valve plate, for 0 ~ 90 ° part of the rotary motion. Receive industrial automation control system 4 ~ 20mA signal to accurately control the valve opening, so as to achieve the flow, temperature, pressure and other different process parameters of the regulation and control.

Application areas

Widely used in food, environmental protection, light industry, petroleum, chemical, water treatment, municipal engineering, paper, electricity, water treatment and other industries in the industrial process automatic control system.

Electric butterfly valve for HVAC and refrigeration industry, but also can be used for industrial areas, general service areas and water treatment.

advantage

1, electric butterfly valve opening and closing convenient and quick, effort, fluid resistance is small, you can often operate.

2, electric butterfly valve structure is simple, small size, light weight.

3, electric butterfly valve can transport mud, in the pipeline mouth to keep the liquid at least.

4, electric butterfly valve low pressure, you can achieve a good seal.

5, electric butterfly valve adjustment performance is good.

Disadvantages

1, the use of pressure and operating temperature range is small.

2, poor sealing.

Installation and maintenance

1, in the installation, the valve to stop in the closed position.

2, the opening position should be determined by the rotation angle of the butterfly plate.

3, with a bypass valve butterfly valve, should be opened before opening the bypass valve.

4, should be installed according to the manufacturer's installation instructions, heavy butterfly valve, should be set up a solid foundation.