How it works
The core component of the rubber diaphragm pneumatic valve is the rubber diaphragm, which is a thin sheet with good flexibility and elasticity. In pneumatic valves, the rubber diaphragm acts as a seal and cut-off fluid. When the pneumatic actuator receives the control signal, it will drive the piston or other mechanical parts inside the valve, and then change the shape and position of the rubber diaphragm to realize the opening and closing of the valve.
Structural features
The rubber diaphragm pneumatic valve is usually composed of a valve body, a rubber diaphragm, a pneumatic actuator, a positioner and other parts. The valve body is the shell of the valve, which is usually made of cast iron, stainless steel, and other materials, which has good corrosion resistance and wear resistance. The rubber diaphragm is a key component of the valve, which is usually made of synthetic rubber that is resistant to oil, acid and alkali, and high temperature.
The pneumatic actuator is the power source that drives the valve action, it can be single-acting or double-acting, and the valve is opened or closed according to the different control signals. Positioners are used to precisely control the opening of the valve to ensure that the valve stops in the correct position.
Fields of application
Rubber diaphragm pneumatic valves are widely used in chemical, petroleum, pharmaceutical, food, water treatment and other industries. In these industries, rubber diaphragm pneumatic valves are primarily used to control a wide range of corrosive, viscous, solid particle-containing fluids. Due to the good sealing performance of the rubber diaphragm, it can effectively prevent the leakage of fluids and protect the safety of the environment and equipment.
| Product name | Rubber diaphragm pneumatic valve |
| Product material | NBR, EPDM, FFKM, Other rubber |
| Hardness (Shore A) | 20 to 90 |
| Applicable temperature °C | -50 to 140 |
| Color | Black, orange, blue, yellow, green, custom |
| Size | Standard/ Custom |
| Advantage | High temperature resistance, Abrasion resistance, Corrosion resistance, Elastic performance |
| Application | Chemical, petroleum, pharmaceutical, food, water treatment, etc |
| Certification | ISO: 9001, ISO: 14001, IATF: 16949 |
Merit analysis
Simple structure and convenient maintenance
The structure of the rubber diaphragm pneumatic valve is simple, and the maintenance and repair work is relatively easy. Since the rubber diaphragm is the main component of the valve, it is very convenient to replace when the rubber diaphragm is damaged, and there is no need to disassemble the entire valve.
Flexible operation and fast response
Driven by a pneumatic actuator, the rubber diaphragm pneumatic valve can be opened and closed quickly with a fast response time, making it suitable for applications that require fast changeover.
Strong corrosion resistance
The choice of rubber diaphragm and valve body material makes it have good corrosion resistance and can work stably in various corrosive environments.
Wide range of fluid applications
Rubber diaphragm pneumatic valves can be used to control a wide range of fluids, including corrosive, viscous, and solid-containing fluids.
Good sealing performance
The rubber diaphragm has good elasticity and flexibility, which can achieve a good sealing effect and effectively prevent fluid leakage.
Installation & Maintenance
When installing a rubber diaphragm pneumatic valve, the following points need to be noted:
Installation location: The valve should be installed in a position that is easy to operate and maintain, and should not be installed in places where it may be affected by mechanical damage or high temperatures.
Medium flow direction: The medium flow direction of the valve should be consistent with the direction of the arrow marked on the valve to ensure the normal operation of the valve.
Air source pressure: The air source pressure of the pneumatic actuator should be within the specified range, too high or too low air source pressure may affect the normal operation of the valve.
Electrical connections: If the valve is equipped with electrical components such as position switches or solenoid valves, make sure that the electrical connections are correct. When maintaining the rubber diaphragm pneumatic valve, the following points need to be noted:
Regular inspection: The sealing performance of the valve and the working status of the pneumatic actuator should be checked regularly, and the problem should be found and solved in time.
Cleaning and maintenance: The external and pneumatic actuators of the valve should be cleaned regularly to prevent dust and impurities from affecting the normal operation of the valve.
Replacement parts: If the rubber diaphragm or other parts are found to be damaged, they should be replaced in time to ensure the normal operation of the valve.
Epilogue
With its unique structure and excellent performance, rubber diaphragm pneumatic valve plays an important role in the field of industrial control. The correct selection and use of rubber diaphragm pneumatic valves can not only improve production efficiency, but also ensure production safety and environmental protection. With the continuous development of industrial automation technology, the application scope and technical level of rubber diaphragm pneumatic valves will continue to expand and improve.
Rubber diaphragm pneumatic valve is an important industrial control component, and its performance and reliability directly affect the safety and efficiency of industrial production. Therefore, it is very important to understand the working principle, structural characteristics, application fields, advantage analysis, and installation and maintenance knowledge of rubber diaphragm pneumatic valves for the design, operation and maintenance of industrial control systems.
Through the introduction of the above content, we can have a deeper understanding of the working principle and application of rubber diaphragm pneumatic valves, and provide reference for the selection and use in practical work. At the same time, correct installation and maintenance are also the key to ensure the long-term stable operation of the rubber diaphragm pneumatic valve. Hopefully, this article will provide you with valuable information and assistance.
Rubber Diaphragm Pneumatic Valve Frequently Asked Questions (FAQs)
- What is the working principle of rubber diaphragm pneumatic valve?
A rubber diaphragm pneumatic valve is a type of valve that is driven by a pneumatic actuator. Its opening and closing parts are rubber diaphragms, which push the valve stem to move up and down through the air pressure of the pneumatic actuator, and then drive the rubber diaphragm to rise and fall, so as to realize the opening and closing of the valve. These valves are suitable for the control of corrosive, viscous, solid particle-containing fluids.
- What are the structural characteristics of rubber diaphragm pneumatic valves?
Body & Diaphragm: The body is typically made of corrosion-resistant material, and a rubber diaphragm separates the valve body cavity from the bonnet cavity and actuating components.
Pneumatic actuator: It can be normally open or normally closed, and the valve can be automatically opened or closed according to the on-off of the air source.
Sealing performance: The rubber diaphragm has good sealing, which can effectively prevent the leakage of the medium.
- What are the occasions for rubber diaphragm pneumatic valves?
Rubber diaphragm pneumatic valves are widely used in chemical, petroleum, pharmaceutical, food, water treatment and other industries, especially for controlling corrosive, viscous and solid particles-containing fluids.
- What should I pay attention to when using rubber diaphragm pneumatic valves?
Do not close the valve with excessive force to prevent damage to the diaphragm.
Butter the lead screws and bolts regularly to prevent rust.
When storing, avoid contact with flammable materials and store in a dry and ventilated environment.
The channels at both ends of the valve should be sealed when in stock, and the opening and closing parts should be in a micro-open state.
- How to maintain and troubleshoot the rubber diaphragm pneumatic valve when it fails?
Leakage problems: Check the valve body for damage or diaphragm rupture and replace the corresponding parts if necessary.
Jamming problems: Clean the inside of the valve, remove the blockage, and add lubricant if necessary.
Air tightness issues: Check the sealing surface for wear, replace the seal, and make sure the installation is correct.
Inflexible operation: Check whether the compressed air pressure is sufficient, reduce the load or increase the load carrying capacity of the valve.
- What are the operating instructions for rubber diaphragm pneumatic valves?
When the switch is operated, the wrench should not be used, and it needs to be closed again after opening to the bottom to avoid opening to the bottom.
When operating manually, do not use the auxiliary lever to prevent excessive torsion from damaging the component.
When replacing the diaphragm, the valve should be fully open, and care should be taken not to overtighten or loosen it.
- What are the key points in the maintenance of rubber diaphragm pneumatic valves?
Attention should be paid to environmental conditions when storing to avoid rubber swelling.
Regularly inspect the sealing parts and wearing parts in contact with the medium, and replace them according to the actual situation.
After overhauling, the sealing performance test should be carried out, and it can be used only after it is qualified.
Tips: Please provide drawings for customized products, we can complete the samples within 4-8 working days.
