With the continuous expansion of the application range of plastic dampers, the role played by valve accessories in the application scenarios cannot be underestimated. Once the plastic dampers in normal operation have abnormal conditions, it will bring a lot to the production process of the application scenarios. The impact is precisely because so many users who purchase plastic air valves are extremely concerned about the problems related to the use of air valves. So what issues should be paid attention to when using plastic air valves? The following is a summary of the details that need to be paid attention to when using plastic air valves:
First of all, pay attention to the problem of protecting the outer surface of the damper
It is difficult to distinguish PP plastic air valve from ordinary valves only from the working principle and appearance structure of PP plastic air valve, but the plastic air valve can be distinguished well according to the different materials of manufacture. If the outer surface of the air valve is damaged or worn, it may affect its excellent use effect. Therefore, when using the plastic air valve, the outer surface of the air valve must be protected in place to avoid damage to the outer surface. To the normal production of the enterprise.
Secondly, the environment around the application scene should be controlled in a state suitable for the operation of the air valve
Combining many cases of using polypropylene plastic air valve, it can be found that the simple structure of the air valve actually has high requirements for the environmental conditions of the application scene. If an index in the application scene exceeds the index suitable for the normal operation of the air valve It may cause damage to the air valve. Therefore, even if the price of plastic air valves purchased in large quantities is favorable, we must strictly monitor the surrounding environmental conditions, and try to control all the indicators in the environment where the air valve is located in a state that can play a good use effect.
The above summary of several issues that need to be paid attention to when using PP plastic air valves is here for the time being. I have to admit that with the assistance of plastic air valves, the media flow in many application scenarios has become more controllable, so when companies use polypropylene plastic air valves, they must pay more attention to these details and strive to make the air valve fully functional. The desired effect.
The PP electric air volume control air valve adopts injection molding, which has strong sealing, beautiful and durable, and is connected to the air pipe for air adjustment. Injection molding air valve is divided into two kinds of materials: one is PP and the other is PVC. Diameters within Φ315mm are injection molded, and other large sizes are manually welded, and they can also be made of stainless steel or glass fiber reinforced plastic materials.
The PP electric air volume control air valve is mainly used in the experimental fume hood and the ventilation pipe of the etching and electroplating production line equipment. It has the advantages of high strength, good heat preservation, moisture resistance, corrosion resistance, good non-combustibility, high temperature resistance, easy installation, etc. Our company can process and manufacture square and round air valves of various specifications according to the drawings and specifications provided by the user.
The electric air volume control valve adopts our self-developed electric control actuator. It can precisely control the air volume. The polypropylene raw material used for injection molding has the characteristics of anti-chemical corrosion, compression resistance, and light weight. It can be widely used in various ventilation duct systems.
This product has a wealth of size models, DN90MM, DN110MM, DN160MM, DN200MM, DN250MM, DN315MM, DN400MM, DN500MM or customized sizes.
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The air valve is an indispensable central air-conditioning terminal accessory in the ventilation, air scheduling and air purification engineering of industrial plants and civil buildings. It is generally used in air conditioning and ventilation system pipes to control the air volume of branch pipes. It can also be used for fresh air and return air. Mixed scheduling.
The air valve is an indispensable central air-conditioning terminal accessory in the ventilation, air scheduling and air purification engineering of industrial plants and civil buildings. It is generally used in air conditioning and ventilation system pipes to control the air volume of branch pipes. It can also be used for fresh air and return air. Mixed scheduling.
1. Structural characteristics of the air valve
(1) The air volume control valve has four specifications when the blade width is all the same. The blade shape is a diamond-shaped double blade, and the blades are soft overlapped, so the sealing performance is excellent.
(2) The valve body frame of the air volume control valve is injection molded from polypropylene material, which has good sealing performance. The product itself has the characteristics of anti-acid and alkali corrosion, and can be widely used in exhaust gas exhaust pipes.
(3) The dispatch valve is divided into manual and electric. The valve body structure and specifications are the same.
2.the characteristics of the air valve
(1) The takeover standard of the split multi-leaf air volume dispatching valve is the same as the rectangular air duct standard of the national ventilation duct standardization.
(2) The blades of the air volume dispatching valve are side-opening and forward-opening, which are used as dispatching valves in ventilation, air dispatching and air purification systems.
(3) According to the test, the air-tightness of the air volume dispatching valve is good, and its relative air leakage is about 5%, and the dispatching performance is good.
3.the scope of application of the air valve
It is widely used in industrial, mining, and civil building HVAC systems to accurately schedule air flow. It is one of the key equipment for controlling ventilation modes in various environments. Its main features are flexible work, low noise, small leakage, reliable structure, safety and convenience.
The above are the main functions and features of the air valve. There are also different types of air valve for different occasions and needs.
The current decoration market has very high requirements for PP ducts, including material, price, and other aspects. Although the small PP pipe is inconspicuous, it plays a vital role in home decoration. People are very concerned about the material of PP air pipe valves, so what materials are used for PP air pipe valves on the market now? The following editor will introduce you to the relevant information about PP air pipe valves.
PP duct, glass fiber reinforced polypropylene pipe. Specializing in the production, sales, and installation of FRPP ducts, the raw materials are pure and no return material is added, the equipment is advanced, and the technology is sophisticated. The FRPP ducts produced have smooth inner and outer walls, uniform texture, low fluid resistance, and strong ventilation; acid and alkali resistance, corrosion, and temperature resistance It has stable performance prevents secondary chemical reactions between the medium in the tube and the tube body, and reduces the difficulty of purification of industrial waste gas and liquid; it is non-toxic and tasteless, environmentally friendly and hygienic, non-scaling and non-bacterial, suitable for process pipelines in the food industry. Air ducts are pipes used for air transportation and distribution. In the chemical, food, and other industries, the requirements for ventilation duct systems are getting higher and higher. Metal ducts are far behind plastic ducts in terms of chemistry, hygiene, and economic efficiency. PP air ducts are widely used in the purification treatment of acid mist, alkali mist, alkaline waste gas, and organic waste gas in chemical, chemical fiber, textile, pharmaceutical, and other industries.
1. One-time regulating valve: If the system is not balanced, it is a regulating valve designed to achieve the required air volume. It is divided into flapper valve, butterfly valve, multi-leaf regulating valve, and three-way valve.
2. Frequently switched regulating valves: Mainly include fresh air valve, primary and secondary air return valve, exhaust valve (including exhaust valve for comprehensive exhaust and partial exhaust).
3. Automatic control valve: Mainly used for automatic adjustment of fresh air, primary return air, and secondary return air. In addition to meeting the requirements of frequently-on-off regulating valves, it should also have good regulating characteristics.
Material and advantages of PP duct valve
The so-called PP pipe actually refers to the material made of polypropylene, which is mainly used in the indoor cold and hot water supply system of buildings. Compared with other materials of pipes, it has good advantages:
1. No corrosion: PP duct valve can withstand the PH value in a wide temperature range, ranging from 1 to 14 high acid and alkali corrosion concentrations.
2. Wear-resistant and non-scaling: PP pipe valves and pipe fittings have a uniform and smooth inner walls, with low flow resistance and no scaling.
3. Reduce vibration and noise: PP pipe valve has excellent sound insulation performance, which can significantly reduce vibration and noise caused by liquid flow.
4. Anti-freeze cracking: PP material has excellent elasticity so that the pipes and pipe sections can expand with the frost heaving liquid without cracking. 5. Anti-condensation, low heat loss: PP material is a poor thermal conductor, reducing condensation and reducing heat loss.
5. Simple installation: PP pipe valve is light in weight, easy to install and operate, and has weldability.
The Venturi air volume control valve has changed the air volume control mode, making the air volume control more stable and accurate, and the valve is independent of pressure. It can respond exceptionally quickly to pressure fluctuations in the air duct and ensure the stability of the air volume control. It is widely used in Places where precise control of air volume is required.
The Venturi air volume control valveis a high-precision, fast response and has nothing to do with pressure changes. It is an air volume control device driven by a short linear stroke electric actuator; it has a unique valve core assembly that is not affected by changes in static pressure in the air duct and is built-in precision stainless steel. The spring maintains a constant air volume by changing the valve core position when the pressure in the air duct changes. Its many characteristics give the laboratory control system a good performance in the fume cupboard and laboratory control.
In the variable air volume system, the Venturi valve is not affected by the static pressure change in the air pipe. When the pressure in the air pipe changes, the valve core position is changed to maintain a constant air volume. After receiving a control command signal from the controller, it is quickly adjusted to the corresponding air volume. As long as the pressure of the air pipe is within the operating range of the variable air volume venturi valve, the venturi valve will accurately control the air volume. After adopting the Venturi valve solution, the designer can hardly consider the difference between the air duct system’s nearest and most negative loop. The Venturi valve can quickly eliminate such unfavorable factors, and there is no air duct pressure balance during system commissioning. .After installation, as long as the corresponding input/output monitoring points are connected according to the wiring diagram, it can be used immediately, saving a lot of on-site debugging time.
The fume hood control system of the Venturi air volume control valve can well solve the problem of the system pipe network pressure change, and the Venturi valve can automatically adjust according to the pipe network pressure change. This process coincides with the pressure change of the pipe network, thus avoiding the adjustment of this process by the wind speed control system and realizing fast and stable air volume control.
Variable air volume fume hood exhaust air control is a typical application of the venturi valve. Fast and accurate exhaust air volume control can always keep the wind speed of the exhaust surface of the fume hood stable within the set range. The Venturi valve quickly determines the required exhaust air volume through the fume hood door position sensor and maintains the face wind speed when the fume hood is running. It can also connect the area occupancy detector, automatically switch the work/standby mode, and reduce the energy consumption of the fume hood. The Venturi valve can be connected to a fume hood touch screen operation display to achieve more display and operation functions.
The focus of laboratory construction is the ventilation system. The core of the ventilation system is airflow control. The precise and fast response air volume control valve has become the top priority: budget, safety, reliability, and operating costs. After the four elimination methods were screened, the airflow control of the Venturi valve became one of the few remaining items.
China Xicheng Environmental Protection Equipment Co., Ltd. has successively developed clean gas storage cabinets, fume hoods, and laboratory waste liquid collection systems with filtration and adsorption technology. High-precision VAV variable airflow control system and a closed sampler that is completely leak-free and easy to operate, and provides a complete set of laboratory toxic and harmful gas treatment programs, and has the current international microbubble organic waste gas treatment technology. The technologies mentioned above have independent intellectual property rights. Provide safe, energy-saving, and environmentally friendly airflow control and exhaust gas purification technology for the laboratory.
PP air valve and air volume control valve are indispensable central air conditioning terminal accessories in the ventilation, air conditioning, and air purification engineering of industrial plants and civil buildings. They are generally used in air conditioning and ventilation system pipes to adjust the branch pipes’ air volume. It can also be used The mixed adjustment of fresh air and return air is used as a gas medium to adjust the flow or cut off the dust in the dusty cold air or hot air gas pipeline of the ventilation and environmental protection projects in the hardware, chemical, building materials, power station, glass, and other industries. According to the operation, it can be divided into manual damper and electric damper. pp windpipe
The electric air valve is composed of the electric actuator and valve body. Electric butterfly valve usually consists of angular stroke electric actuator (0～90°partial rotation) and the butterfly valve as a whole through mechanical connection. The active mode is classified into the on-off type and regulating type, and the latter two are general. It is a straight thread electric actuator (0～100), and the valve body is mechanically connected with PP packing.
Features of the electric damper
1. It is designed and manufactured by adopting a new structural form of welding of mid-line disc plate and temporary structure steel plate. It has a compact structure, lightweight, easy installation, low flow resistance, large circulation, avoids the influence of high-temperature expansion, and is easy to operate.
2. There are no connecting rods, bolts, etc., so it works reliably and has a long service life. It can be installed in multiple positions and is not affected by the flow direction of the medium.
use:
This butterfly valve is a non-closed butterfly valve, which is widely used in the production process of building materials, metallurgy, mining, electric power, and other production processes on pipelines with a medium temperature of ≤300℃ and a nominal pressure of 0.1Mpa to communicate, open and close or adjust the amount of medium.
Structural features:
This butterfly valve is designed and manufactured by adopting a new type of structure welded between a centerline disc plate and a temporary structure steel plate. It is compact in format, light in weight, easy to install, small in flow resistance, large inflow, and easy to operate. There are no connecting rods, bolts, etc., in the body, reliable work, and long service life. It can be installed in multiple positions and is not affected by the flow direction of the medium.
working principle:
The butterfly valve is driven by a motor to go to the actuator. The disc can rotate freely within the range of 90° to achieve the purpose of opening and closing or adjusting the flow of the medium.
Electric damper Uses and characteristics
This valve is made of the same material as the valve body and processed into a sealing ring, which adopts electric or pneumatic transmission. The applicable temperature depends on the material selection of the valve body, and the nominal pressure is ≤0.6MPa. Generally, it is suitable for industrial, metallurgical, environmental protection, and other pipelines for ventilation and media flow adjustment. Its main features are:
Novel and practical design, unique structure, lightweight, and rapid opening and closing.
Small operating torque, convenient operation, labor-saving and dexterous.
Use suitable materials to meet the requirements of low, medium, and high medium temperatures and corrosive mediums.
Electric damper adopts standard
Design standard: GB/T12238-1989 JB/T8692-1998
Flange connection size: GB/T9115.1-2000
Structure length h: GB/T12221-1989
Pressure test: GB/T13927-1992; JB/T9092-1999
electric damper actuator
Adopt the new series of GT electric actuators, double-acting and single-acting (spring reset), gear transmission, safe and reliable; large-diameter valves adopt series AW-type pneumatic actuators with fork drive, reasonable structure, ample output torque; there are double-acting and single-acting.
Geared double pistons, ample output torque, and small volume.
The cylinder is made of aluminum gold material, which is light in weight and beautiful in appearance.
Manual operating mechanism can be installed on the top and bottom.
The rack-and-pinion connection can adjust the opening angle and rated flow.
The actuator can be equipped with electrical signal feedback instructions and various accessories to realize automatic operation.
IS05211 standard connection provides convenience for product installation and replacement.
The joint screws adjusted at both ends can make the standard product have an adjustable range of ±4° between 0° and 90°. Ensure the synchronization accuracy with the valve.
the option of electric damper and accessories
The following accessories can be selected according to different controls and requirements:
Adjustable accessories: electric positioner, pneumatic positioner, electric converter.
Air source treatment accessories: air filter pressure reducing valve, air source treatment triple pieces.
Manual mechanism: HVSD manual mechanism
Performance characteristics of PP damper
Features of the manual damper
(1) The connecting pipe size of the split multi-leaf air volume regulating valve is the same as the rectangular air pipe size stipulated by the national ventilation duct standardization.
(2) The manual air valve blades are side-opening and forward-opening and are used as regulating valves in ventilation, air conditioning, and air purification systems.
(3) Tested and measured, the air volume regulating valve has good air tightness, and its relative air leakage is about 5%, and the regulating performance is good.
the structural characteristics of the manual damper
(1) The manual air valve is unified into four specifications in the blade width. The blade shape is a diamond-shaped double blade. The blades are softly overlapped, so the sealing performance is good.
(3) The manual air valve body frame is formed by cold-rolling 2mm galvanized sheet, then it is welded by carbon dioxide gas shielded welding or processed and welded from ordinary Q235 board; the blade is cold-rolled with 1mm galvanized sheet into a corrugated shape, two pieces Synthetic spot-welded square shaft, or 2mm G235 steel plate cold-formed, single-piece punched square shaft or welded round shaft.
the scope of application of the air volume control valve
It is widely used in industrial, mining, and civil building HVAC systems to adjust airflow accurately. It is one of the vital equipment to control ventilation modes in various environments. Its main features are flexible operation, low noise, small leakage (closed type leakage <0.5%), wide operating temperature range, reliable structure, safety, and convenience.
