XIXHENG EP LTD specializes in the production of PP plastic pneumatic dampers. The material is PP polypropylene. It is suitable for ventilation systems with explosion-proof requirements such as chemical industry and laboratories. PP plastic pneumatic dampers are composed of plastic dampers and pneumatic actuators. The size supports customization , square or round
XICHENG ER LTD specializes in the production of PP plastic pneumatic dampers. The material is PP polypropylene, which is resistant to acid and alkali corrosion. The working principle of PP plastic pneumatic dampers is the same as that of PP electric dampers, but the electric actuator is changed to a pneumatic actuator. The third-party plate solenoid valve controls the switch of the air pipe to realize the opening and closing of the PP plastic pneumatic air valve.
PP plastic pneumatic air valve is suitable for application environments with explosion-proof requirements such as chemical plants and laboratories. It is used in PP material ventilation duct systems, and is connected to PP air ducts. It is used for exhaust control of corrosive gases, anti-corrosion and acid resistance. Alkali, PP plastic pneumatic air valve has complete specifications, and is used with PP air pipe, elbow, tee, and reducing diameter to form a complete PP ventilation pipeline system. The pneumatic actuator of PP plastic pneumatic air valve can be selected according to the specifications of the air valve. torque.
PP plastic pneumatic air valve is a kind of non-sealed butterfly valve, which is widely used in colleges and universities, chemical industry, biology, electric power, energy, environmental engineering, etc. in the production process, the medium temperature is less than or equal to 90℃, and the nominal pressure is less than 0.1Mpa. Connecting, opening and closing or adjusting the medium, it is usually installed on the top of the fume hood, the PP suction hood and the inlet of the pipeline of the one-use-one-standby spray tower to switch the exhaust gas flow direction of the spray tower.
PP plastic pneumatic air valve principle
The PP plastic pneumatic air valve is installed in the PP pipeline system, and the PP pneumatic air valve can be opened and closed according to the needs through manual operation or PLC automatic control technology. , Drive the rotation of the butterfly valve blade, achieve a 90-degree angle, achieve the purpose of opening and closing, and have a feedback indication function. Through the differential pressure detection device, after closing the air valve, the signal is transmitted to the PLC system, so as to control the PP fan inverter to reduce the speed and save energy.
PP plastic pneumatic air valve performance characteristics
PP material processing, acid and alkali corrosion resistance, strong anti-corrosion performance; PP pneumatic air valve has socket design at both ends, and can also be welded flange connection; High-strength actuator, all-copper design, switch life more than 20,000 times; The inner and outer walls are smooth and the wind resistance is small.
PP plastic pneumatic damper industry application
Workshop ventilation system Chemical fresh air system Laboratory ventilation system HVAC system
Introduction to Variable Air Volume System (VAV System)
Variable Air Volume System (VAV) The Variable Air Volume System (VAV system) was born in the United States in the 1960s. According to indoor load changes or changes in indoor required parameters, it maintains a constant supply air temperature and automatically adjusts the air supply volume of the air conditioning system, so that the indoor parameters meet the requirements. Full air air conditioning system. Since the air conditioning system operates at part load most of the time, the reduction in air volume results in a reduction in the energy consumption of the fans. The VAV system seeks to meet the requirements of the indoor air environment with less energy consumption practicality
The operating cost is low. Since the air volume decreases with the decrease of the load, the cooling capacity and fan power are close to the actual needs of the building’s air conditioning load. In the transitional season, the outdoor fresh air cooling capacity can also be utilized as much as possible.
The indoor temperature of each room can be adjusted individually, and the air volume adjustment of each room is directly controlled by the thermostat installed in the room.
It has the advantages of general low-speed central air-conditioning systems. For example, it can carry out better air filtration, noise reduction, etc., and is conducive to centralized management.
Unlike other systems, the number of indoor air changes, airflow distribution and fresh air volume can always be guaranteed. When the air volume is too low and affects the airflow distribution, the end reheating can only be used instead of further reducing the air volume.
Laboratory Airflow Control System Features
Laboratory Safety Safety is one of the most important goals of a laboratory. Laboratory safety includes two parts: ensuring the safety of operators in the laboratory and ensuring the safety of the surrounding environment of the laboratory. The surface wind speed control of the fume hood can better ensure the safety of operators in the laboratory; the ventilation and pressure control of the laboratory is an important means to ensure the surrounding environment of the laboratory. In order to ensure the safety of operators in the laboratory, we need to accurately and quickly control the airflow of various experimental equipment to ensure that the toxic and harmful gases generated in the experiment will not overflow and endanger the safety of personnel. Keep the surrounding environment safe with laboratory pressure control.
Energy saving of laboratory airflow control system Under the circumstance that energy saving and emission reduction has become an important indicator, energy saving has become a very concerned issue for laboratory managers and construction units. In general commercial buildings, the fresh air ratio is 15%, while for laboratories, in order to ensure the safety of the system, 100% fresh air is usually used, and in order to ensure the experimental conditions, sometimes the ventilation system runs continuously for 24 hours, which consumes a lot of energy (ventilation and air conditioning). The energy consumption of the system is usually 10 to 100 times that of ordinary commercial buildings). Therefore, under the premise of ensuring safety, energy consumption should be reduced as much as possible.
Operation and maintenance of the laboratory To ensure the stability of the laboratory control system, the control system must be simple and reliable. Intelligent technology airflow control system, simple and reliable working principle, stable product performance, no need for regular maintenance. In order to facilitate future management and maintenance, the laboratory control system should be able to easily integrate with the building control system, have an open network platform, and have functions such as monitoring energy usage, alarming, and safety analysis.
Flexibility of the system The design of a good control system should try to consider the user’s updatable function of the function in the future. The increase, decrease and displacement of equipment such as fume hoods during renovation and expansion, as well as the change of laboratory pressure polarity, the intelligent technology control system can be easily adjusted, and the system has good scalability.
The health and comfort of the experimental environment Ensure that the laboratory has a suitable and stable temperature and humidity, and the airflow is stable and odor-free, providing a healthy and comfortable working environment for the laboratory staff to improve work efficiency.
Laboratory Variable Air Volume Control System Program Introduction
Fume hood surface wind speed control system consists of a single fume hood surface wind speed control system including: fume hood surface wind speed controller, surface wind speed sensor, adjustment window displacement sensor, exhaust valve (with anti-corrosion coating), and unmanned sensor (optional) composition.
Using the surface wind speed sensor, the fume hood controller detects the wind speed, and uses the adjustment valve to increase or decrease the wind speed, so as to control the surface wind speed of the fume hood to maintain the specified 0.3 ~ 05m/s. In addition, when someone is operating the fume hood, in order to speed up the adjustment of the opposite wind speed, the adjustment window displacement controller can speed up the corresponding speed of the surface wind speed, thereby improving the response time of the surface wind speed.
The displacement sensor is installed on the adjustment door of the fume hood to sense the position of the adjustment window of the fume hood, calculate the opening of the fume hood, and input the potentiometer signal into the fume hood monitor. Change the position to calculate and adjust the valve according to the calculation, and do not have to wait for the wind speed sensor to detect that the wind speed is low before adjusting, so as to ensure the rapidity and accuracy of the constant surface wind speed of the fume hood.
This control scheme makes up for the shortcomings that the surface wind speed sensor alone is not fast enough to respond, and the air volume of the displacement sensor alone is not the real wind speed.
For a fume hood to accurately control the surface wind speed, the surface wind speed controller, the wind speed sensor, the displacement sensor, the regulating valve, and the corresponding power connection line are required. The manned and unmanned sensor is an optional device. With this sensor, a high surface wind speed such as 0.5m/s can be maintained when there are people in front of the fume hood, and a low 0.3m/s when no one is present, so that the It can further reduce system power consumption while ensuring the safety of operators.
Composition of laboratory negative pressure residual air environment control system After accurately controlling the surface wind speed of a single fume hood in the laboratory, in order to maintain the safety of the surrounding environment of the laboratory, it is necessary to control the negative pressure of the laboratory. By keeping the laboratory at a reasonable negative pressure (negative tens of Pa), the leakage of laboratory gas into the corridor or adjacent offices can be avoided. It is very important to ensure the safety of the environment around the laboratory, such as corridors, laboratory personnel offices, etc.
Since the use of negative pressure control requires the airtightness of the room, the opening and closing of doors and windows, etc., another room control system that reasonably controls the fresh air and safety of the room is the use of residual air volume control. The residual air volume controller refers to monitoring the exhaust air volume of the entire laboratory fume hood before adding a certain amount of fresh air to form a reasonable fresh air and maintain a certain residual air volume environment.
A laboratory negative pressure control system includes a negative pressure controller, a differential pressure sensor, and a regulating valve; the residual air volume control system includes a residual air volume controller, and the valve can be adjusted.
The composition of a single whole laboratory variable air volume control system The composition of a single whole laboratory is to have the face velocity controller of each fume hood integrated with the room negative pressure control system.
Adjustment window displacement sensor
Regulating valve
Sided fan speed controller
Sided wind sped sensor
Room pressure sensor
Regulating valve
Supplementary air regulating valve
Room negative pressure controller
Composition of multiple laboratory variable air volume control systems. The composition of multiple laboratories is that the entire system can be formed by networking the air inlet and exhaust ducts, as well as the electric control part of the network according to the actual situation in multiple rooms.
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.
Reasons for choosing us:
Honest manufacturer, reasonable price and quality assurance.
Source manufacturer, sufficient inventory, high cost performance.
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The electric air valve adopts a new generation of electric controller to precisely control the air volume. Intelligent operation and easy installation. It is widely used in laboratory ventilation equipment, industrial ventilation systems, and environmentally friendly waste gas treatment equipment.
The wind valve material is PP and PVC, which is characterized by anti-corrosion, anti-aging, price concessions, easy installation
The current manual air valve mold a molding, high strength, good sealing, smooth appearance, low resistance. Its specifications are diameter 63 mm, 75 mm, 90 mm, 110 mm, 160 mm, 200 mm, 250 mm, 315 mm. The diameter of this pneumatic equipment is more than 355 mm which can be customized.
Although the pneumatic valve is more popular, it still has its value. The electric air valve is composed of two parts, an angular-stroke electronic electric actuator and a butterfly valve adjustment. This mechatronics design can simultaneously realize the functions of the opening signal position feedback, position indication, and manual operation. It can be said to be powerful, Reliable performance and precise control.
The working principle of the electric actuator is to use the forward and reverse rotation of the motor to realize the switch of the valve. The air volume can be automatically adjusted through the intelligent sensor system.
Features:
It is mostly used in cold air or hot air gas pipelines in ventilation and environmental protection projects. The specific industries are chemicals, building materials, power stations, glass products, etc. The sealing ring of the electric air valve is tightly processed with the same high-strength material as the valve body, which has good stability. It also has the advantages of simple structure, small operating torque and light weight, and the characteristics of rapid opening and closing, flexible actions, small operating torque, and large flow capacity are also one of the reasons for the good response of users. It can be applied to the control and adjustment of dust, flue gas, air, and fluids containing suspended particles and thick and turbid and slurry fluids, so it can be regarded as a powerful and practical component in industrial control components.
There is also a manual switch valve function on the electric actuator of the electric damper, which is to make emergency treatment in the absence of points and emergency situations. The editor here wants to remind everyone that it is best to do routine maintenance of the electric damper when using it, so as to extend its working life and ensure its working stability.
The air valve is the most critical connecting component in the air purification system, and the installation process is straightforward. But also need to pay attention to the following matters:
Before installing the air valve, check whether the frame structure is firm and whether the adjustment, braking, positioning, and other devices are accurate and flexible.
The air valve installation is the same as that of the air pipe: align its flange with the flange of the air pipe or equipment, add sealing gaskets, and tighten the bolts to make the connection with the air pipe or equipment firm and tight.
When installing the air valve, the valve’s operating device should be convenient for manual operation. The installation direction should be consistent with the path marked on the valve body shell.
The installed air valve should have clear and accurate opening direction and opening degree signs on the valve body shell.
The fusible piece of the fire damper should be installed on the windward side of the air duct, and its melting point should meet the design requirements.
Several commonly used types of air valve installation requirements
Several commonly used air valve types: multi-page control valve, fire damper, check valve, electric control valve, manual control valve.
Multi-page valve
If there are many branches, install a split multi-page control valve at the addition of the duct. If the wind speed at the end is stricter, you can add a split multi-page control valve before the end;
Check valve
When the system is worried that the airflow in the room at the end of the individual branch will flow back to the system, it is necessary to add a check valve on this branch;
Electric valve
The electric control valve is generally installed at the air pipe interface of the equipment. If the system requires electric control at the end, it also needs to be added;
The installation of the air duct needs to be distributed and installed according to the specific purification system design plan. Because the air volume control valve plays a vital role in the entire purification system, you should choose a product of qualified quality when purchasing the air valve. Simultaneously, it needs to have the characteristics of fire prevention, corrosion resistance, and good sealing. It is recommended to use the damper products of China XichengEnvironmental Protection Company. The products have undergone strict quality inspection, provide professional purification scheme design, and worry-free after-sales service. The products are exported to many countries around the world.
