Classification of flow valves, what is a flow control valve

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

1. Throttle valve:After adjusting the area of the orifice, the movement speed of the actuator with little change in load pressure and low motion uniformity requirements is basically stable.

2. Speed control valve:When the load pressure changes, the inlet and outlet pressure difference of the throttle valve can be kept as a fixed value. In this way, after the throttle area is adjusted, the speed control valve can keep the flow through the throttle unchanged regardless of the change of load pressure, so that the movement speed of the actuator is stable.

3. Diverter valve:Regardless of the size of the load, the two actuators of the same oil source can obtain the same flow rate as the equal flow valve or synchronous valve; The proportional flow rate is obtained by the proportional diverter valve.

Working principle: The structure of the digital flow control valve is composed of automatic valve core, manual valve core and display part. The display part is composed of the flow valve movement, the sensor transmitter, and the electronic calculator display part.

Its work is extremely complex. The measured water flows through the valve, the water flow hits the impeller in the flow movement, the impeller rotates and the sensor transmitter induces, so that the sensor sends out a telecommunication signal proportional to the flow rate, and the flow telecommunication signal is sent to the electronic calculator through the wire, and the flow value is displayed after the calculator calculation and microprocessor processing.

The manual spool is used to adjust the flow rate, and the desired flow value is set according to the displayed value. The automatic valve core is used to maintain a constant flow rate, that is, when the pressure of the pipe network changes, the automatic valve core will automatically open a large fire and close the small valve port under the action of pressure to maintain the set flow value.

Driving routes: The whole journey is about kilometres.

Starting Point: Pudong New Area.

1.From the starting point, head northwest along Jindai Road for 210 meters and turn left onto Lilac Road.

2.Drive along Lilac Road for 350 meters and turn right onto Century Avenue.

3.Drive along Century Avenue for 260 meters, turn right into Yanggao Road interchange.

4.Drive 100 meters along the Yanggao Road interchange, towards Yan'an East Road Tunnel, Xinjian Road Tunnel, Renmin Road Tunnel and Dalian Road Tunnel, and turn slightly right into Century Avenue.

5.Drive along Century Avenue for kilometers and turn right into Lujiazui Ring Road.

6.Drive along Lujiazui Ring Road for 140 meters, pass the China Insurance Building on the right for about 60 meters, and enter Lujiazui East Road.

7.Drive 240 meters along Lujiazui East Road and go straight into Century Avenue.

8.Drive along Century Avenue for 250 meters, cross the Yincheng Road interchange for about 170 meters, and go straight into the Yan'an East Road Tunnel.

9.Drive along the East Yan'an Road Tunnel for kilometers, pass the Yanhe Building on the right for about 80 meters, and then go straight into East Yan'an Road.

10.Drive along East Yan'an Road for 140 meters, pass the Huangpu District Office Building on the right for about 150 meters, and turn slightly right onto the ramp.

11.Drive along the ramp for 350 meters and go straight onto Yan'an Elevated Road.

12.Drive along the Yan'an Elevated Road for kilometers, cross the Wanbao International Plaza on the right, Tiananmen Square is at the Jiangsu Road exit, and turn slightly right onto the ramp.

13.Drive along the ramp for 240 meters and go straight onto West Yan'an Road.

14.Drive along Yan'an West Road for 10 meters, pass the Huamin Hanzun International West Building on the right for about 150 meters, and turn right into Jiangsu Road.

15.Drive along Jiangsu Road for a kilometer, pass the Zhongxi Building on the right for about 200 meters, and turn left into Changning Road.

16.Drive along Changning Road for 570 meters and turn left.

17.Drive 10 meters to the end (on the left side of the road).

Destination: Changning District.

The function of the flow control valve is to change the liquid resistance by changing the size of the flow area of the valve port or the length of the channel, and the flow control valve is to control the flow rate of the flow valve, so as to realize the adjustment and control of the movement speed (or speed) of the hydraulic actuator. Commonly used flow control valves include throttle valves, speed control valves and overflow throttle valves, among which throttle valves are the simplest but most widely used flow control valves.

Characteristics and application of throttle valve: The advantages of throttle valve are simple structure, low cost and easy adjustment, but because there is no pressure compensation measure, the flow stability is relatively poor. It is often used in the hydraulic system of oil supply throttle speed regulation of fixed pump oil supply with little load change or low requirements for speed control accuracy, and sometimes it is also used in the volumetric throttle speed regulation hydraulic system of variable pump oil supply, and sometimes it can also be used to play the role of load resistance or actuator buffering.

Characteristics and application of speed control valve: The advantage of speed control valve is that the flow stability is good, but because the liquid flow passes through the speed control valve, it passes through one more liquid resistance, and the pressure loss is large. It is often used in the hydraulic system of oil supply throttle speed regulation of fixed pump oil supply with large load change and high speed control accuracy, and sometimes it is also used in the volumetric throttle valve speed regulating hydraulic system of variable pump oil supply.

Characteristics and application of relief valve: the inlet pressure of the relief throttle valve is the outlet pressure of the hydraulic pump, because it can change with the load, so the power loss is small, the system heating is small, and it has energy-saving significance. However, usually the spring of the pressure compensation device in the overflow throttle valve is harder, so the pressure fluctuation is larger, the flow stability is worse than that of the ordinary speed regulating valve, and it is more obvious when the flow rate is small, so the overflow throttle valve is only suitable for the throttle speed regulation system with large power and the speed stability requirement is not too high.

In addition, because the overflow throttle valve makes the outlet pressure of the pump change with the change of load pressure, and the difference between the two is only the difference between the pressure difference between the throttle valve orifice valve, therefore, the overflow throttle valve can only be arranged at the outlet of the hydraulic pump in use.

A flow control valve is a pipeline control device that coordinates the flow rate and flow of fluid in a pipeline, prevents overflow, regulates pressure, and protects equipment, among other things. Flow control valves are usually composed of a valve body, a valve disc, and a driving device, which can control the flow manually or automatically.

Flow control valves are widely used in petrochemical, electric power, metallurgy, water conservancy and other fields, and have the advantages of energy saving, safety and stability. In oil and gas transmission systems, high-flow control valves can effectively control oil and gas flow and prevent pipeline accidents. In terms of energy saving, flow control valves can regulate flow rates, reduce energy consumption, and improve pipeline efficiency.

According to different working principles and use occasions, flow control valves can be divided into manual control valves, automatic control valves, regulating valves and other types. Among them, the electric control valve is an intelligent dismantling product, which has the characteristics of high precision, fast response, and remote control of Luqingchang. In addition, flow control valves can be classified according to different materials and specifications to suit different application needs.

Main Differences:Control Valve:The control valve, also known as the control valve, is used in the field of industrial automation process control by accepting the control signal output by the regulating control unit.

It is the final control element that changes the process parameters such as medium flow, pressure, temperature, and liquid level with the help of power operation. Generally by the executive machine.

structure and valve composition. According to the stroke characteristics, the control valve can be divided into linear stroke and angular stroke; According to the power used by the actuator, it can be divided into three types: linear mega characteristics, equal percentage characteristics and parabolic characteristics according to its functions and characteristics. Control valves are suitable for air, water, steam,

All kinds of corrosive media, mud, oil and other media. English name: Controlvalve, the tag usually starts with fv. Regulating valves are commonly used.

Category: pneumatic control valves, electric control valves, hydraulic control valves, self-operated control valves.

Flow Valve:

The flow valve is suitable for water systems that need to be controlled for flow control, especially for non-corrosive liquid media such as heating and air conditioning.

flow control; Installed in the water system, the system flow rate can be automatically and continuously maintained at the required set value after a one-time adjustment before operation.

Automatically eliminate the hydraulic imbalance caused by various factors in the water system, maintain the flow required by users, and overcome the "uneven cold and heat" to improve the supply.

Heat, the room temperature of air conditioning, improve the energy efficiency of the system, to achieve energy saving, is the heating and air conditioning system to achieve "metering and charging" ideal supporting products.

Flow control valves and on/off valves are two different types of valves, and their main differences are in function and application.

1.The function is different: the function of the on/off valve is to open or close the liquid flow in the pipeline, and its main function is to control the on/off of the fluid. Flow control valves, on the other hand, can regulate the fluid to maintain a constant flow or pressure in the pipeline, and its main function is to control the flow rate.

2.The implementation principle is different: the on-off valve is a mechanical valve, which realizes the on-off of the liquid flow through manual, electric, pneumatic and other means. Flow control valves, on the other hand, often use an automatic control system to precisely control the flow rate by finely adjusting the position of the internals.

3.Different applications: Because of their different functions, the applications of the two valves are also different.

On-off valves are suitable for situations where frequent opening or closing of pipelines is required, or only two-state (fully open or fully closed) control is required; The flow control valve is suitable for occasions that require constant flow or pressure, such as constant flow water supply, pressure control, etc.

In summary, although flow control valves and on/off valves are both valves, there are many differences in practical applications. Choosing the right valve type needs to be decided based on your specific fluid handling needs.

Flow control valves and on/off valves are two different types of valves, the main difference of which is how and what they do for the flow of fluids.

1.Flow control valves.

The flow control valve is a kind of valve that can adjust the flow rate, and its main function is to adjust the flow of the medium in the pipeline by changing the opening of the valve. Flow control valves typically use control devices such as adjusting rods, motors, pneumatic actuators, etc., which can accurately adjust the flow in the pipeline as needed.

Flow control valves are widely used, such as petrochemical, chemical, water treatment, pharmaceutical, food processing, air conditioning and other fields. For example, in industrial production processes, the flow rate of the medium needs to be precisely adjusted according to the process requirements to ensure the quality and stability of the product.

2.On-off valves.

On-off valve is a kind of valve that can only achieve on-off flow, and its main function is to control the flow of medium in the pipeline by opening or closing the valve. On-off valves are generally operated manually, and there are also some valves that are operated by pneumatic, electric, etc.

The application range of on/off valves is narrow, and it is usually only suitable for some occasions that need to quickly switch the flow direction of the medium, such as water supply and drainage systems, fire protection systems, etc.

In summary, the difference between a flow control valve and an on/off valve is the difference in how it is controlled and the application. Flow control valves can accurately regulate the flow of media in pipelines, which is commonly found in industrial production processes; The on-off valve is mainly used to quickly switch the flow direction of the medium, and is suitable for some water supply and drainage, fire protection and other fields.

The main difference between a flow control valve and an on/off valve is the way in which they control the flow of fluid. Specifically, the flow control valve realizes the control of the flow rate by adjusting the opening of the valve or spool; The on-off valve is to directly open or close the valve or valve body to achieve on-off control of the fluid.

At the same time, the control accuracy of the flow control valve is high, and it can realize the accurate control of the flow, which is generally used in the occasions where the flow needs to be strictly controlled, such as chemical, electric power, petroleum and other industries; The control accuracy of the on-off valve is relatively low, and it is mainly used in some ordinary occasions, such as tap water pipelines, drainage systems, etc.

Finally, for use, the flow control valve generally needs to be monitored and adjusted in real time to ensure its control accuracy and performance; On/off valves, on the other hand, are relatively simple and require only routine service and maintenance to use.

1 is different in its main functions.

2 The main function of the flow control valve is to control the flow rate of the fluid, which can be achieved by adjusting the valve opening.

The main function of the on-off valve is to control the on-off of the fluid, and there are only two states of on/off.

3 In addition, flow control valves typically have a pressure sensor upstream or downstream of the pipeline to automatically regulate the flow, while on/off valves do not require this setup.

As a result, flow control valves have a wider range of applications where precise flow control is required, while on/off valves are suitable for applications where simple on/off control is required.