Low-E Gate Valve Packing Set, Graphite, Inconel, 48mm * 68mm
Key Specifications / Features
The Low Emission Gate Valve Packing Set Factory produces high-performance packing sets tailored for gate valves. Each set features an inner diameter of 48mm and an outer diameter of 68mm, comprising 5 rings made from expanded graphite reinforced with Inconel wire. This combination ensures excellent high-temperature resistance and durability, making it ideal for applications where thermal stability and low emissions are critical.
Detail Information
Product Name: Low Emission Packing Set for Gate Valves
Size: ID 48mm * OD 68mm * 5 Rings
Model: M600
Material Properties:
Graphite Purity: ≥99%
Metal Wire Content: 20% (Material options: Inconel 600 or 625)
Sulfur Content: ≤50PPM
Chlorine Content: ≤20PPM
Features:
This engineered low-emission/leakage valve packing set utilizes a woven metal wire-reinforced expanded graphite ring with a highly adaptable core. The permanent elastic components of the sealing kit ensure minimal leakage rates and reduced friction throughout the valve's lifecycle. Our sealing kit is specifically designed for low-emission leakage valve applications.
Advantages:
High-temperature resistance and chemical resistance
Full compliance with the latest fugitive emission regulations
Excellent sealing performance and permanent elasticity
Good anti-extrusion performance under high pressure
Optimized ring configuration requires lower compression force
Operating Parameters
Speed: 2 m/s
Temperature Range: -200°C to +400°C (for most media), -200°C to +550°C (for steam)
pH Value: 0 to 14
Pressure: 25 MPa
Media: Suitable for most chemical substances (solvents, hydrocarbons, acids, alkalis, steam, alcohol, oil)
Certifications/Licenses: TA-Luft, ISO 15848, API 589 (Fire Safe)
Except for strong oxidizing acids, such as sulfuric acid and nitric acid.
Standards and Regulations on Fugitive Emissions
Fugitive emissions typically refer to the unintentional release of gases or vapors from industrial facilities, which can have significant impacts on health, safety, and the environment. Surveys show that these emissions mostly come from valves and flanges, with valve issues being the most prominent. Fortunately, a comprehensive approach can significantly reduce such emissions. For example, between 1990 and 2011, the emissions of non-methane volatile organic compounds (NMVOC) in Europe were reduced by 57%. This progress was driven by legislative frameworks, such as the European Industrial Emission Directive (IED 2010/75/EU) and the European Integrated Pollution Prevention and Control (IPPC). The concept of Best Available Techniques (BAT) and the BREF reference documents support end-users' efforts to comply with stricter emission standards, which have been incorporated into national standards like the German Air Quality Standards.
Burgmann Packings actively promotes this process by developing and manufacturing fugitive emission control (FEC) products that meet and exceed the strictest leakage regulations. In addition to internal testing, these products have also been certified by independent testing agencies.
Evidence and Impact
Evidence from around the world shows that another key factor in reducing overall on-site leakage is the implementation of Leak Detection and Repair (LDAR) programs. These programs intuitively identify the most severe leakage points and focus on maintenance and repair to achieve short-term, high-impact results. As the market leader in LDAR fugitive emission management projects, The Sniffers has completed over 6,000 LDAR projects globally in the past 25 years. Data from a European refinery's emission reduction project show that by implementing a coordinated and effective plan, annual emissions can be reduced by 75%.
Compliance is just one major advantage for plant operators. Improvements in various health, safety, and environmental (HSE) factors have produced measurable results. Moreover, life cycle cost analysis indicates that reducing the leakage of expensive process media can also increase profits.
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FAQs
Low-emission packing systems are specifically engineered to minimize microscopic leakage along the valve stem, which is a common source of fugitive emissions in industrial plants.
Compared with conventional packing, low-emission designs achieve better performance through:
Higher material density control to reduce permeation paths
Pre-compressed or die-formed graphite rings for stable sealing stress
Optimized load distribution using live-loading spring systems
Improved surface finish compatibility with stem materials
These design improvements allow the packing to maintain consistent sealing force even under thermal cycling and vibration. As a result, leakage levels can be reduced to extremely low thresholds (often measured in parts per million), supporting compliance with environmental regulations and reducing operational losses.
Basic Concept
Low Emission Valves refer to valves that, through special design and manufacturing processes of the stem packing and mid-seat gasket, control the leakage of media (gases, liquids) to extremely low levels. They are primarily used in industrial scenarios with high safety and environmental protection requirements. The core objective is to reduce or prevent the leakage of harmful media (such as volatile organic compounds (VOCs), toxic gases, flammable and explosive substances, etc.) into the external environment. Therefore, low emission valves offer multiple advantages in terms of energy conservation, emission reduction, reduced safety risks, and environmental pollution.
Key Technical Standards and Leakage Grades
The performance of Low Emission Valves is quantified by their leakage rate, and different industries follow different standards. Common standards include:
1. International Standards
ISO 15848-1: This standard classifies valve leakage grades into four levels: A (the highest requirement), B, C, and D. Grade A requires a leakage rate of ≤100 ppm (by volume).
API 624 (American Petroleum Institute): This standard, applicable to the refining and chemical industries, specifies a leakage rate of ≤100 ppm (for gases) under specific pressures.
EPA Standard (U.S. Environmental Protection Agency): This standard, targeting VOC emissions, requires a leakage rate of ≤500 ppm.
2. Chinese Standards
GB/T 42223-2022: This standard, which references international standards, regulates the design, manufacturing, and testing of Low Emission Valves.
At first, manufacturing low emission valves was pretty much the same for us as it was for other regular valve manufacturers in China. If we ran into problems like valves not passing tests or having leak rates that kept changing, we'd just try to get better packing materials from a different supplier. We didn't really stop to think about the bigger picture, like how the whole manufacturing process or the properties of the materials we were using might be causing the issues.
Over time, we figured out that the metal parts of the valves were pretty reliable, but we hadn't been paying enough attention to the non-metal parts that actually do the sealing. And those parts are super important for making sure the valves don't leak. So, back in 2008, we decided to focus on manufacturing low emission valves from start to finish.
First, we created a special team just for figuring out better ways to seal valves. They dug deep into how to make the seals work really well and how to build them. At the same time, we started working closely between the people who design the seals and the people who manufacture the valves. By tweaking the design of the seals and how we put the valves together, we made a system where everything works together perfectly. After that, we tested a bunch of different valves to see how well they sealed in all kinds of situations: different sizes, pressures, and temperatures. All the data we collected from these tests helped us keep improving our valves.
Now, when we manufacture a bunch of valves and check them randomly, they all meet the tough standards of API 624 and ISO 15848-1. We've gone from just following a process to really understanding and controlling the technology ourselves.
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