To properly size a breather valve, follow these steps:

Step 1. Determine Tank Specifications

• Measure the tank diameter and height.
• Identify the tank’s location and the environmental conditions it will be exposed to.
• Collect the Material Safety Data Sheet (MSDS) for the media stored in the tank, which includes:

*Media flash point
*Media boiling point
*Latent heat of vaporization
*Relative molecular mass of vapor​​​​.

Step 2. Calculate Maximum Flow Rates

Establish the maximum filling rate of the tank (in cubic meters per hour).
Establish the maximum emptying rate of the tank (in cubic meters per hour)​​​​.

Step 3. Set Pressure and Vacuum Requirements

*Determine the set internal pressure (in mbar) that the valve must release.
*Determine the set vacuum pressure (in mbar) that the valve must handle.
*Consider the set temperature and specify whether the vent type will be pipe-away or atmospheric​​​​.

Step 4. Select Valve Size

*Based on the required flow rates and set pressures, use appropriate calculations to determine the valve size. Utilize standards such as API 2000 or ISO 28300 for precise sizing guidelines. Many manufacturers provide sizing software or charts to aid in selecting the correct valve size​​​​.
*The valve size can range from 2″ to 12″ (50 to 300 mm), depending on the application requirements and flow calculations​​​​.

Step 5. Material and Additional Features

*Choose the valve material based on the media’s compatibility and environmental conditions. Options include aluminum, ductile iron, stainless steel, carbon steel, and various alloys​​​​.
*Consider additional features like protective coatings, alarm sensors, or special designs (e.g., flame arresters, spring-loaded or weight-loaded mechanisms) as needed for specific applications​​​​.

Step 6. Utilize Manufacturer Support

If the size is not clear, many manufacturers offer a valve sizing service to provide optimum valve performance and cost-effective technical specifications. We offer sizing and calculation services tailored to specific customer requirements​​​.
By following these steps, you can ensure that the breather valve is correctly sized for your application, providing effective protection against over-pressure and vacuum conditions in your storage tanks.

A breather valve(pressure/vacuum relief valve) is designed to protect storage tanks, process systems, and equipment from excessive pressure and vacuum conditions. These valves allow for the controlled venting of gases or vapors and help to maintain a safe working environment by preventing tank damage and minimizing product loss due to evaporation​​​​.

Breather valves work by using weight-loaded or spring-loaded pallets to control the flow through the valve. When the internal pressure or vacuum reaches a set point, the pallet lifts off the seat to allow flow. This prevents emission losses until very close to the set pressure and prevents air intake until very close to the set vacuum​​.

1. High flow capacity from a compact valve size.
2. Wide range of pressure and vacuum settings for maximum tank protection.
3. Minimization of gas loss and evaporation, resulting in economic savings.
4. Compliance with stringent emission control regulations.
5. Modular design allows for customization to specific requirements​​​​.

Breather valves can be constructed from various materials, including aluminum, stainless steel, carbon steel, ductile iron, and alloys such as C276. The choice of material depends on the specific application and the type of media being handled​​​.

As aplicações comuns incluem a proteção de tanques de armazenamento em indústrias como farmacêutica, alimentos e bebidas, processamento químico e indústrias petroquímicas. Eles também são usados ​​em sistemas onde os vapores precisam ser canalizados ou ventilados para a atmosfera.

Breather valves are designed and tested according to standards such as API 2000:2014 and EN ISO 28300:2016. They also meet European Directive 2014/34/EU for equipment used in potentially explosive atmospheres (ATEX)​​​​.

Selecting the right breather valve involves considering factors such as tank size, media characteristics (flash point, boiling point, latent heat of vaporization, molecular mass), location, maximum filling and emptying rates, and the required set pressure and vacuum settings. Consulting with a Yee Valve expert and using a valve sizing service can help ensure optimal performance and cost-effectiveness​​​​.

Regular inspection and maintenance are necessary to ensure breather valves operate correctly. This includes checking for any blockages, ensuring the pallets and seats are clean and free of debris, and verifying that the set pressures and vacuums are accurate. Maintenance procedures should follow the manufacturer’s recommendations to maintain safety and efficiency​​​​.

A flame arrester is a safety device installed in equipment that contains flammable gases or vapors. It prevents the propagation of flames and explosions by quenching the flame front before it can reach the protected side of the device.

Flame arresters function by cooling the flame front through a series of narrow passages or “quenching gaps.” These gaps are designed to be small enough to extinguish the flame while allowing gases to pass through.

• Deflagration Flame Arresters: Protect against explosions where the flame propagates at subsonic velocities.
• Detonation Flame Arresters: Designed for more severe conditions where the flame front travels at supersonic speeds, producing shock waves.
• End-of-Line Flame Arresters: Installed at the end of a pipeline to protect against external sources of ignition.
• In-Line Flame Arresters: Installed within the pipeline to prevent the spread of flames within the piping system.

Flame arresters are commonly used in systems for generating, storing, and transporting flammable gases and liquids, such as chemical processing plants, oil refineries, gas storage facilities, and pipelines.

Regular inspection and maintenance are essential for flame arresters to function correctly. Key maintenance tasks include:

• Initial inspection three months after commissioning.
• Annual inspections as a minimum for clean processes.
• Additional inspections if an explosion is detected or if there are signs of damage or corrosion.
• Cleaning to remove debris, insects, or corrosion that can block the quenching elements​​​​.

• Ensure the flame arrester is correctly installed according to the operating conditions.
• Verify that no unauthorized modifications have been made.
• Check for blockages, corrosion, and mechanical damage.
• Confirm that all fasteners are secure and tightened to the required torque.
• Record all maintenance activities accurately.

Poorly maintained flame arresters can fail to provide adequate protection against explosions, potentially leading to catastrophic equipment damage and safety hazards. Common issues include blocked elements, severe corrosion, and mechanical damage, which can impair the flame arrester’s effectiveness​​​​​​.

Flame arresters must be used under the specific conditions they were designed and tested for. They are available in various configurations to suit different piping systems, and the correct model should be selected based on the type of gas, operating pressure, and temperature range​​​.

• Ensure compatibility with the process conditions, including gas type and pressure.
• Follow torque guidelines for flanged connections.
• Position the flame arrester correctly to facilitate future maintenance.
• Check for leaks after installation to ensure a proper seal.

• Do not use lifting eyebolts to lift the entire flame arrester assembly; they are only for handling the housing during inspection and maintenance.
• Avoid piping drainage, instrumentation, and cleanout connections to a common line to prevent flame bypass.
• Replace damaged flame elements immediately as they can render the flame arrester ineffective​​​​.

Na Yee Valve, somos uma empresa familiar que integra habilmente a fabricação e o comércio de válvulas industriais. Nossa sede estratégica fica em Taipei, Taiwan, apoiada por três fábricas de última geração na China continental.

• Pague 30% adiantado e 70% antes do envio por TT (Produtos Padrão)
• Pague 100% antecipadamente por T.T. (Produtos Especiais)
• 100% L/C at sight from special customers and L/C should be issued from the world’s first-class bank. (Special Markets)

1. Technical Assistance

Yee Valve offers expert guidance for valve selection, installation, and maintenance. Customers can contact technical support via phone, email, or fax for any queries or issues related to our products. Also, we provide unique solutions to meet specific customer requirements, including custom designs and material options to suit various industrial applications .

2. Documentation and Certification

Compliance and Standards

All valves are designed and manufactured in compliance with relevant international standards such as API 2000 and ISO 28300. Yee Valve provides necessary documentation, including compliance certificates, user manuals, and test certificates to assure product quality and safety​.

Product Manuals

Detailed product manuals and technical datasheets are provided to help customers understand the specifications and operational procedures of our valves​​.

3. After-Sales Support

Warranty Services

Yee Valve offers warranty services for our products, ensuring that any manufacturing defects or operational issues are addressed promptly. The warranty terms are provided at the time 12-18 months of purchase, and customers can request repairs or replacements as needed.

Spare Parts Availability

We maintain a stock of essential spare parts to facilitate quick replacements and minimize downtime. Customers can order spare parts directly from Yee Valve to ensure compatibility and reliability​​​.

4. Maintenance and Repair Services

Preventive Maintenance

Yee Valve provides guidelines for preventive maintenance to help extend the lifespan of their valves and ensure continuous, reliable operation. Regular maintenance schedules and procedures are outlined in the product manuals.

Repair Services

In case of valve malfunction or damage, Yee Valve offers repair services performed by trained technicians. Customers can send their valves to authorized service centers or request on-site repair services depending on the severity of the issue​​​.

5. Training and Support Programs

Training Programs

Yee Valve conducts training programs for customers to educate them on proper valve handling, maintenance, and troubleshooting techniques. These programs can be conducted on-site or at Yee Valve’s training facilities.

Technical Workshops

Periodic technical workshops and seminars are organized to keep customers updated on the latest advancements in valve technology and best practices in valve management​​​.

6. Customer Feedback and Improvement

Feedback Mechanism

Yee Valve values customer feedback and has established mechanisms to collect and act on customer suggestions and complaints. This feedback helps in improving product quality and service standards​​​.

When you make an order to Yee Valve, here are the steps you should follow based on the documents provided:

1. Verify the Order Details

Ensure that all order details, such as the model, quantity, and specifications match your request. Check the specific models ordered and their corresponding specifications against the provided documents.

2. Check the Material Specifications

Confirm that the materials listed for each valve component match what you ordered. For instance, body materials (e.g., Aluminum, AISI 316) and gasket materials (e.g., expanded graphite, PTFE) should align with the order specifications​​​​​.

3. Dimensions and Connection Types

Validate that the dimensions (size, weight, etc.) and connection types (flanged, threaded, etc.) are correct. Make sure the dimensions of each valve (e.g., DN 50, DN 100) are as per the order​​.

4. Pressure and Vacuum Settings

Verify that the pressure and vacuum settings are correctly calibrated according to the order. Check if the valves are set to the correct pressure/vacuum relief settings required by you​​​​.

5. Accessory and Add-on Features

Ensure that any additional features or accessories (like proximity switches, flame arresters, or temperature sensors) requested by you are included and properly installed​​​.

6. Documentation and Certification

Check that all necessary documentation, including test certificates, compliance certificates (e.g., ISO 9001, API Std 2000), and user manuals, are included with the shipment. Verify certifications for pressure equipment directives if applicable​​​​.

7. Quality Control and Final Inspection

Conduct a final inspection to ensure all valves are free from defects and meet quality standards. Confirm that the valves have passed all required tests and quality checks before shipping​​.

All valves from Yee Valve are covered with a 12 months warranty from the date of installation or 18 months warranty from the shipment date, whichever comes earlier. The scope of the warranty is covered for manufacturing defects only. If a valve failure is due to incorrect operation by the customer, the warranty is not applicable.

Todos os produtos enviados são documentados e fornecemos serviços OEM para muitas marcas sem qualquer informação sobre o fabricante dos produtos. Quaisquer desenhos, instruções de operação, relatórios de testes, etc., pertencem ao proprietário da marca.

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