Valves are divided into automatic valves and drive valves. Automatic valves (such as safety valves, pressure reducing valves, steam traps and check valves) are opened and closed by the change of medium pressure of equipment or pipeline itself. Drive valves (gate valves, globe valves, ball valves, butterfly valves, etc.). ) is driven by a driving device (manual, electric, hydraulic, pneumatic, etc.). ) to control the pressure, flow and direction of the medium in the equipment or pipeline. Because the pressure, temperature, flow rate and physical and chemical properties of the medium are different, the control requirements and use requirements for equipment and pipeline systems are also different, so there are many types and specifications of valves. According to incomplete statistics, China's valve products have reached more than 4,000 models and nearly 40,000 specifications, and valves play a very important role in economic life. Guangzhou solenoid valve is an automatic basic element used to control fluid, belonging to the actuator; It is not limited to hydraulic and pneumatic. Solenoid valves are used to control the direction of hydraulic flow. The mechanical equipment in the factory is generally controlled by hydraulic steel, so it will be used. Generally speaking, domestic solenoid valve manufacturers are not mainly hydraulic solenoid valves, but generally produce solenoid valves with two-position and double ventilation fluid.
Working principle of solenoid valve: there is a closed cavity inside the solenoid valve, and there are through holes at different positions, each of which leads to a different oil pipe. There is a valve in the middle of the cavity and two electromagnets on both sides. When the electromagnetic coil on which side is energized, the valve body will be attracted to which side. By controlling the movement of the valve body, different oil discharge holes will be blocked or leaked, while the oil inlet hole will always be open, and hydraulic oil will enter different oil discharge pipes, and then the oil pressure will push the oil-filled piston and then drive the piston rod. In this way, the mechanical motion is controlled by controlling the current of the electromagnet. Guangzhou ball valve and plug valve belong to the same type of valve, but its closing part is a sphere, which rotates around the center line of the valve body to realize opening and closing.
Guangzhou ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. Ball valve is a new type of valve widely used in recent years. It has the following advantages: 1. The fluid resistance of ball valve is small, and its resistance coefficient is equal to that of the same length of pipe section. 2. The ball valve has simple structure, small volume and light weight. 3. The ball valve is sealed reliably. At present, plastic is widely used as the sealing surface material of ball valve, which has good sealing performance and has been widely used in vacuum system. 4. The ball valve is easy to operate and can be opened and closed quickly. It only needs to rotate 90 degrees from full opening to full closing, which is convenient for remote control. 5. The ball valve is easy to maintain, the ball valve has a simple structure, the sealing ring is generally movable, and it is convenient to disassemble and replace. 6. When the ball valve is completely opened or closed, the sealing surfaces of the ball and the valve seat are isolated from the medium, and when the medium passes through, the sealing surfaces of the valve will not be corroded. 7. Ball valves have a wide range of applications, ranging from small diameter to several millimeters to several meters, from high vacuum to high pressure. Guangzhou butterfly valve is a valve that uses the circular butterfly plate rotating with the valve stem as the opening and closing part to realize the opening and closing action. Butterfly valve is mainly used as a block valve, and can also be designed to have the function of adjustment or interception adjustment. At present, butterfly valves are increasingly used in low-pressure large and medium-diameter pipelines.
The butterfly plate of Guangzhou butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0 and 90. When it is rotated to 90, the valve is fully opened.
Guangzhou butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. But also can be quickly opened and closed by rotating 90 degrees, and the operation is simple. At the same time, the valve has good fluid control characteristics. When Guangzhou butterfly valve is in full open position, the thickness of butterfly plate is the only resistance for medium to flow through the valve body, so the pressure drop generated by the valve is very small and it has good flow control characteristics. Guangzhou butterfly valve has two sealing forms: elastic seal and metal seal. Elastic sealing valve, the sealing ring can be embedded in the valve body or attached to the periphery of the butterfly plate. Guangzhou cut-off valve is a kind of commonly used cut-off valve, which is mainly used to connect or cut off the medium in the pipeline, and is generally not used to adjust the flow. The cut-off valve is suitable for a wide range of pressure and temperature, but it is generally used for medium and small diameter pipelines.
Guangzhou Globe Valve Main Standard GB12233-89 Iron Globe Valve and Lift Check Valve for General Valves GB 12235-89 Steel Globe Valve and Lift Check Valve with Flanged Connection JB/T53 174-94 Globe Valve Quality Classification JB/ T53 165-92 High Pressure T587-93 Marine flanged bronze globe valve GB/T590-92 changes the fluid flow through power operation by receiving the control signal output from the regulating control unit. Control valves are generally composed of actuators and valves. According to the power used by the actuator, control valves can be divided into three types: pneumatic control valves with compressed air as the power source, electric control valves with electricity as the power source, and electro-hydraulic control valves with the pressure of liquid media (such as oil) as the power source. In addition, according to its functions and characteristics, there are solenoid valves, electronic, intelligent and field bus control valves.
Selection of valve body type of Guangzhou control valve
There are many kinds of valve bodies of Guangzhou control valve, including straight-through single seat, straight-through double seat, angular, diaphragm, small flow, three-way, eccentric rotation, butterfly, sleeve, spherical and so on. In the specific selection, the following considerations can be made: (1) The shape and structure of the valve core are mainly considered according to the selected flow characteristics and unbalanced force. (2) Wear resistance. When the fluid medium is a suspension containing high concentration of abrasive particles, the internal material of the valve should be hard. (3) Corrosion resistance. Because the medium is corrosive, try to choose a valve with simple structure. (4) Temperature and pressure of the medium. When the temperature and pressure of the medium are high and change greatly, the valve whose valve core and valve seat materials are less affected by the temperature and pressure should be selected. (5) Prevent flash evaporation and cavitation which only occur in liquid medium. In the actual production process, flash evaporation and cavitation will cause vibration and noise and shorten the service life of the valve. Therefore, when selecting control valves, flash evaporation and cavitation should be prevented. Guangzhou directional valves mainly include electromagnetic directional valves, manual directional valves, electro-hydraulic directional valves, four-way directional valves, multi-way directional valves, pneumatic directional valves, five-way directional valves and two-position two-way directional valves.
Guangzhou manual directional valve is a kind of directional valve which uses manual lever to control the displacement of valve core. In the hydraulic system, it can control the direction of oil flow to change the movement direction of the actuator. There are two structures: steel ball positioning and spring reset. Steel ball positioning means that when the external force of the control handle is cancelled, the valve core is kept in the reversing position through steel ball positioning. Spring return means that when the external force of the operating handle is cancelled, the spring automatically returns the valve core to the initial position. Electromagnetic directional valve is a control valve that changes the direction of liquid flow through electrical signals. It can be used to realize unloading, sequential action and oil circuit commutation of hydraulic system. Electromagnetic directional valves are mainly used in hydraulic systems of construction machinery, mining machinery, lifting and transportation machinery and other machinery. Guangzhou check valve is also called check valve or check valve. Used in hydraulic system to prevent oil flow from flowing backwards.
Guangzhou one-way valve has two types: straight-through type and right-angle type. Straight-through check valves are installed on threaded pipes. Right-angle check valves have three forms: threaded connection, plate connection and flange connection. Hydraulic control one-way valve, also known as locking valve or pressure maintaining valve, is the same as one-way valve to prevent oil from flowing back. However, when the oil flow needs to flow in the reverse direction in the hydraulic circuit, the one-way valve can be opened by controlling the oil pressure to make the oil flow in both directions. Hydraulic control one-way valve adopts conical valve core, which has good sealing performance. When the oil circuit needs to be closed, the valve can be used as a one-way lock of the oil circuit to maintain the pressure. There are two ways to control oil leakage: internal leakage and external leakage. Internal leakage type can be used in the oil circuit with no back pressure at the reverse outlet of oil flow; Otherwise, the leakage type is needed to reduce the control oil pressure. Guangzhou electric valve takes the motor as the power to open and close the valve, which is used for relatively large valves and advanced electric valves and can be used for process control.
Guangzhou electric valve has the advantages of easy assembly, low failure rate and meeting the requirements of industry automation, and is a more cost-effective choice for the industry. Because of the use of traditional pneumatic valves, it is inevitable to have pipelines, solenoid valves and compressors to cooperate, while electric valves are driven by motors, which is simple and convenient to install. The installation of electric valves conforms to the original automatic control circuit of the factory, which can save other costs. In addition, the motor is driven to open and close smoothly, and there is no disadvantage of excessive instantaneous impulse, so the failure rate can be greatly reduced. Many people think that electric valves are expensive and expensive to use, but they are not. If many fittings and pipes are installed in the traditional valve as a whole, the price is not dominant, but it will bear more maintenance costs. Therefore, the prospect of electric valve is still relatively broad. Guangzhou steam trap plays a role in blocking steam and draining water in steam heating system. Choosing the right trap can make the steam heating equipment achieve the highest working efficiency. In order to achieve the best results, it is necessary to fully understand the working performance and characteristics of various types of traps. There are many kinds of traps, each of which has a different performance. When choosing a trap, you should first choose its characteristics to meet the best operation of steam heating equipment, and then consider other objective conditions, so that choosing the trap you need is correct and effective.
Guangzhou steam trap should be able to "identify" steam and condensate, so as to play the role of blocking steam and draining water. "Identifying" steam and condensed water is based on three principles: density difference, temperature difference and phase change. Therefore, according to three principles, there are three types of traps: mechanical, thermal static and thermal dynamic. 1. In the production process, heat exchange equipment, drying room, rapid heat exchanger, distillation equipment, etc. Production heating equipment that needs rapid heating and is not allowed to store condensed water should use mechanical traps. 2. In steam pipes, heat tracing pipes, small heating equipment, heating equipment and steam equipment with low temperature requirements, thermal static traps should be selected. 3. In high temperature and high pressure superheated steam pipelines and equipment, special steam traps for superheated steam should be selected. Guangzhou proportional valve is a hydraulic valve whose output is proportional to the input signal. It can continuously and proportionally control the pressure, flow rate and direction of liquid flow according to a given input electric signal. Proportional valve is a valve that can simultaneously extract several solutions and mix them according to a set ratio. The low-pressure gradient elution device in liquid chromatography is to add a proportional valve in front of the high-pressure pump, mix several solvents online according to the set ratio under normal pressure, and then pump them into the chromatographic system.
Guangzhou proportional valve can realize automatic control, remote control and program control. Proportional valve can combine the advantages of fast and flexible electricity with the characteristics of high hydraulic transmission power. The proportional valve can continuously and proportionally control the force, speed and direction of the actuator, and can prevent the pressure or speed change and the impact phenomenon during reversing, which simplifies the system and reduces the use of components. Proportional valve is easy to manufacture, and its price is lower than servo valve, but higher than ordinary hydraulic valve. Because it is necessary to set a DC proportional amplifier between the input signal and the proportional valve, the investment cost is correspondingly increased. The use conditions and maintenance of proportional valve are the same as those of ordinary hydraulic valve, and its anti-pollution performance is good. Proportional valve has excellent static performance and appropriate dynamic performance. Although the dynamic performance is lower than that of servo valve, it can meet the requirements of general industrial control. Proportional valve is more efficient than servo valve. Guangzhou diaphragm valve is a special block valve, and its opening and closing part is a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the bonnet. In fact, the diaphragm valve is just a "pinch" valve, an elastic and disturbed diaphragm connected to the compressor through a screw pile. The compressor moves up and down through the operation of the valve stem. When the compressor rises, the diaphragm is kept at a high position, thus forming a channel. When the compressor descends, the diaphragm presses on the weir of the valve body (if it is a weir valve) or the bottom of the profile (if it is a straight-through valve). Diaphragm valves are suitable for switching and throttling.
The structural design of Guangzhou diaphragm valve itself is especially suitable for ultra-pure medium or heavily polluted and very viscous liquid, gas, corrosive or inert medium. When combined with control equipment, diaphragm valve can replace other traditional control systems, especially for solid and easily contaminated inert media. Products are mainly used in biopharmaceuticals, food and industry; As well as industrial water treatment in power, chemical industry, electroplating and other industries, and also used in the production of semiconductor wafers. Diaphragm valve is especially suitable for conveying corrosive and viscous fluids, such as mud, food, medicine, textured adhesive and so on. Because the operating mechanism of the diaphragm valve in the pipeline is not in contact with the conveyed fluid, there is no pollution and no need for packing, and the packing part of the valve stem is unlikely to leak. From the working principle of Guangzhou gas valve, the working performance of gas valve will directly affect the work of compressor cylinder, so the following requirements are required for gas valve: small resistance loss. The valve resistance loss is related to the valve clearance speed and spring force of air flow. The higher the gas velocity, the greater the energy loss; If the spring force is too large, the resistance loss is also large, and its size is determined according to the rationality criterion of valve motion law. The air valve closes in time and quickly, and there is no air leakage when it is closed, which improves the efficiency of the machine and prolongs the service life. Long service life and reliable operation. The main factor limiting the life of the valve is the quality of the valve plate and spring. Generally, for compressors that run continuously for a long time, the life expectancy is above 8000 hours. For mobile, short-term or intermittent compressors, the requirements can be slightly lower.
Guangzhou gas valve is an important part of reciprocating piston compressor, and it is also one of the easily damaged parts. Its quality directly affects the displacement, power consumption and operation reliability of the compressor. At present, the compressor is developing in the direction of high speed, and one of the key problems to limit the speed increase is the air valve. Piston compressor generally adopts "automatic valve", that is, the opening and closing of the air valve is realized by the pressure difference between the two sides of the valve plate, and there is no other driving mechanism. The function of Guangzhou expansion valve in the system is 1: throttling and atomizing liquid refrigerant; 2. Accurately control the flow of refrigerant into the evaporator according to the supercooling degree and refrigeration condition of the original design system; 3. Quickly balance the high and low pressure of the system during shutdown. When all expansion valves are designed to match a vehicle, the damage degree of the compressor under the condition that the expansion valves are out of control should be basically considered.
Because Guangzhou expansion valve belongs to ultra-high precision processing parts, the processing of its internal regulating mechanism parts is completed at a constant temperature in the factory, and the inflation of the temperature sensor is strictly consistent, and no leakage is allowed. After the expansion valve is assembled, it must undergo rigorous testing and anti-fatigue aging sampling inspection. Structure of expansion valve: 1: temperature sensor; 2. Filling temperature-sensitive gas or liquid into the expansion corrugated cavity; 3: spherical valve seat; 4 ball valve; 5: spring; 6: Overheating adjustment screw washer and screw; 7: Internal and external (H-type) seals; 8: Thrust rod and corrugated cavity gasket; 9: Valve body; 10: capillary and so on. Temperature sensing bag: it is a component that must be correctly contacted and fixed on the outlet pipeline of evaporator, and is used to sense the real-time return air temperature of evaporator, and provide the expansion corrugated box with the pressure of thermal expansion and cold contraction of the filling material through the connected capillary; According to the change of pressure, the expansion bellows pushes the thrust rod to adjust the opening of the ball valve in combination with the resistance of the superheat adjusting screw and the spring, so as to realize the accurate adjustment of the refrigeration capacity. When the temperature of the air return pipe rises, the substance in the temperature sensing package expands, the pressure rises, and the pressure in the expanded corrugated box also rises. The expansion of the corrugated cavity pushes the thrust rod to overcome the spring resistance, and the opening of the ball valve becomes larger. When the temperature of the air return pipe decreases, the substance in the temperature sensing package expands and the pressure decreases, so does the pressure in the expanded corrugated box. The spring resistance pushes the thrust rod to compress the corrugated cavity, and the opening of the ball valve becomes smaller. So as long as the refrigeration cycle continues, it is necessary to constantly push and pull to adjust the balance. Judging from the basic principle of Guangzhou regulation, the balance valve is actually a manual regulating valve with opening indication. Pressure measuring holes are installed at the upstream and downstream ends of the balance valve for measuring the pressure drop of the fluid passing through the valve. When in use, the flow through the valve can be calculated by measuring the pressure drop of the valve and reading the opening. Its function is equivalent to the combination of regulating valve and equivalent orifice flowmeter, which makes the flow distribution of each branch meet the requirements. When the main circulating pump runs at variable speed, the flow distribution ratio of each branch remains unchanged.
The working principle of Guangzhou dynamic balance valve: by changing the flow area of the valve core to adapt to the changes before and after the valve, so as to achieve the purpose of controlling the flow. Dynamic balance valve is a throttling element with variable local resistance. When the pressure difference before and after the balance valve is less than the minimum starting pressure difference, the spring is not compressed and the flow area is the largest. When the pressure difference between the front and back of the balance valve exceeds the working range, the valve bladder completely compresses the spring, and water only flows through the circular holes on both sides of the valve bladder. At this time, the valve liner becomes a fixed regulator, and the flow rate is proportional to the pressure difference, which increases with the increase of the pressure difference. The balancing valve has the characteristics of limiting the maximum flow rate of air-conditioning terminal equipment within a certain pressure range and automatically maintaining the flow rate. In large-scale and complex projects with unstable air-conditioning heating load, it simplifies the debugging of the system and shortens the debugging time. Guangzhou safety valve can be divided into direct-acting type and pilot type according to its structural form. It is connected to the outlet of the hydraulic pump to ensure the constant system pressure or limit its maximum pressure, and sometimes it is connected to the inlet of the actuator to protect the actuator. Direct-acting safety valve is mainly composed of valve core, valve body, spring, upper cover, adjusting rod, adjusting nut and other parts.
Guangzhou pilot safety valve consists of pilot valve and main valve. The pilot valve is a cone valve, which is actually a small flow direct-acting overflow valve. With the increase of the inlet pressure of the safety valve, the hydraulic pressure Fx acting on the pilot spool increases. When Fx is greater than or equal to Pt2, the pilot valve port opens, and the pressure oil at the inlet of the overflow valve overflows to the outlet of the overflow valve through the damping hole and the pilot valve port, and then returns to the oil tank. The pressure oil at the inlet of the overflow valve overflows back to the oil tank through the main valve port. When the opening of the main valve port is constant, the pilot valve core and the main valve core are in a state of force balance, the valve port satisfies the pressure-flow equation, and the inlet pressure of the main valve is a certain value. Guangzhou pressure regulating valve is a combined valve assembly consisting of pressure regulating valve, oil-water separator and one-way valve.
The principle of Guangzhou pressure regulating valve is to use the principle of spring force and pressure balance. When the spring pressure is less than the air pressure, the valve is closed; When the pressure is greater than the elastic force of the spring, the force of compressed air under the rubber pressure regulating diaphragm pushes the diaphragm to arch upward and leave the valve seat, so that air flows into the air chamber. At this time, the unloading piston moves under the action of air pressure, pushing the exhaust valve away from the valve seat, so the air charged into the air chamber by the air compressor is discharged into the atmospheric compressor through the exhaust valve and the exhaust port for idling operation. The function of the pressure regulating valve is to limit the maximum pressure of the system to 0.75-0.80 MPa (7.5-8.0 bar). On the premise of ensuring the safe and reliable operation of the system. Pressure regulating valves are widely used in transportation, industry and civil fields. Guangzhou servo valve is mainly divided into force feedback electro-hydraulic servo valve and position feedback servo valve.
The task of Guangzhou electro-hydraulic servo valve is to convert electric energy into hydraulic pressure to control the oil motor. Servo valve consists of torque motor, two-stage hydraulic amplification and mechanical feedback system. The torque motor consists of permanent magnets with coils on both sides. When the coils at both sides of the servo valve produce unbalanced current, the armature and baffle deflect due to the electromagnetic force, and the servo valve converts the electric quantity into displacement. The first stage amplification consists of non-65,438+0 double nozzles and flat * * * 65,438+0 baffles, which are fixed at the midpoint of the armature and pass between the two nozzles, so that the servo valve forms two variable orifices between the nozzle end and the baffle, and the oil pressure controlled by the baffle and the nozzle leads to both ends of the second stage slide valve. The second stage slide valve of the servo valve is a four-way slide valve structure, and the center of the slide valve is embedded with 65,438+. When the armature is in the middle position, the baffle has the same effect on the oil flow through the two nozzles, and there is no pressure difference between the two ends of the slide valve. There are many kinds of hydraulic valves in Guangzhou. Besides general valves with different specifications, there are many special valves and compound valves. As far as the basic types of hydraulic valves are concerned, they can be classified as follows: by function, 1. Pressure control valve is a hydraulic valve used to control the flow pressure of liquid in hydraulic system. 2. The flow control valve is a hydraulic valve used to control the liquid flow in the hydraulic system. 3. Directional control valve is a hydraulic valve used to control the direction of liquid flow in the hydraulic system. In addition to the above-mentioned general hydraulic valves with single function, there are some special hydraulic valves and compound hydraulic valves with more than two functions, such as controlling both direction and pressure, or controlling both direction and flow, and so on.
Classification by control mode 1. Hydraulic valves, such as fixed value or switching control valve, set the position of the valve core or the spring on the valve core in a certain working state by switching electromagnet or manual adjustment mechanism, so as to keep the pressure, flow rate or flow direction of liquid flow at a certain value. This kind of hydraulic valve belongs to the most common common common hydraulic valve. 2. Proportional control valve The output (flow rate and pressure) of this valve can be continuously adjusted proportionally according to the change law of input signal. They usually use proportional electromagnets to convert the input electrical signals into force or control the mechanical displacement of valves. Other forms of electrical input control devices can also be used. Proportional valve has been widely used in many occasions because of its simple structure, reliable operation, low price, obviously improved performance compared with ordinary fixed-value control valve and continuous control by electric signal. Guangzhou fire damper is a kind of valve installed on the air supply and return duct of ventilation and air conditioning system. It is usually opened and automatically closed when the gas temperature in the duct reaches 70℃ in case of fire. It can meet the requirements of fire stability and fire integrity in a certain period of time and play the role of smoke prevention and fire prevention. The smoke exhaust fire damper is installed on the pipeline of the smoke exhaust system, which is usually open, and automatically closes when the gas temperature in the pipeline reaches 280℃ in case of fire, which can meet the requirements of fire stability and fire integrity in a certain period of time. A valve that can prevent smoke and fire.
There are two kinds of fire dampers in Guangzhou, 70 degrees and 280 degrees. 70 degrees for new fans. When the temperature reaches 70 degrees, turn off the new fan to prove that there is a fire, and don't enter the air again. When the temperature reaches 280 degrees, turn off the exhaust fan, otherwise the fire will burn to other places along the air duct. 1. Fire dampers are divided into 70 degrees Celsius and 280 degrees Celsius according to the temperature. Second, the fire damper is divided into manual and DC24V electromagnet control, that is, electric; Third, the fire damper has remote control and ontology control of remote control and near control. Guangzhou three-way valve: It was born in 1950s. The three-way valve has three entrances and exits connected with the pipeline, which is equivalent to the integration of two single-seat valves. The three-way valve was originally used to replace two single-seat valves and put into use in the system. Three-way valves are divided into confluence valves and diverter valves. The three-way valve has three entrances and exits connected with the pipeline, which is equivalent to the integration of two single-seat valves; When using the three-way valve, the two-way valve and the three-way connecting pipe can be omitted. The three-way confluence valve has two inlets and one outlet, which mixes two media into a third media. The three-way diverter valve has an inlet and two outlets, and divides the medium into two paths after passing through the valve.
(1) Guangzhou three-way valve can be used to replace two mutually switched two-way valves, which can save one two-way valve and one three-way connecting pipe. (2) Guangzhou three-way valve is often used for bypass regulation of heat exchange system, and can also be used for simple proportional regulation. (3) The medium temperature of Guangzhou three-way valve should be less than 300℃, and the temperature difference between the two media should be less than 150℃. (4) When Guangzhou three-way valve is changed to open and close, the actuator must be replaced. (5)DN & lt； At the 80 o'clock position, the confluence valve can also be used as a diverter valve. Guangzhou pneumatic control valve consists of pneumatic actuator and control valve. Actuator is the driving device of actuator, which takes compressed air as power and outputs thrust; The regulating valve is the regulating part of the actuator, which is in direct contact with the medium and regulates the flow of the medium. Pneumatic control valve has the advantages of simple structure, reliable action, large output thrust, convenient maintenance, fire and explosion prevention, low price and so on. It is widely used in automatic adjustment and remote control of industrial production processes such as chemical industry, petroleum, metallurgy, electric power and textile.
Guangzhou pneumatic control valve can adjust all kinds of liquids, gases and vapors within the range of nominal pressure and temperature, and the leakage is small when the pneumatic control valve is closed. Pneumatic control valve can open or close the air according to the action mode of the actuator.
[Pressure regulating valve]
Guangzhou pressure regulating valve is an energy-saving product that can automatically adjust the pressure only by the pressure change of the medium itself without external energy. You only need to set the post-pressure value of the pressure regulating valve on the guidance and command system of the pressure regulating valve according to your own technological requirements during the debugging of the pressure regulating valve equipment, and the pressure regulating valve will adjust the pressure of the air source to the post-valve pressure you set and keep it constant automatically.
Guangzhou pressure regulating valve allows you to remotely control the downstream oxygen flow in the main control room; The flow orifice is used to feed back the actual process parameters of the on-site oxygen pressure regulating valve group to the main control room, so that you can conveniently control the on-site oxygen pressure regulating valve group remotely. Guangzhou temperature control valve mainly plays the role of temperature control. The sensor of the temperature control valve has an expandable bellows for proportional adjustment. The sensor of the temperature control valve is controlled by the surrounding room temperature, and the effective pressure in the bellows corresponds to the room temperature load, which is balanced by the tension of the adjusting spring. When the room temperature rises, the liquid pressure in the bellows of the temperature control valve rises correspondingly, thus driving the cone of the temperature control valve to the closed position until the bellows and the spring reach a balance.
Guangzhou temperature control valve can set the room temperature according to the different requirements of users, and its temperature sensing part constantly senses the room temperature, and automatically adjusts the heating at any time according to the current heat demand to prevent the room temperature from overheating and achieve the highest comfort of users. The temperature control valve can automatically maintain the accurate room temperature according to the predetermined requirements, regardless of the climatic conditions. Install a temperature control valve in each room to ensure that the "free" heat energy emitted by sunlight, lighting facilities, machinery and human body can be fully utilized to save energy.