Low-E Gate Valve Packing Set, Graphite, Inconel, 48mm * 68mm

Name: Low-E Gate Valve Packing Set, Graphite, Inconel, 48mm * 68mm
SKU: MV-20250625-GP-02
Availability: InStock
Rating: 5 (1 reviews)

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.

Request a quote

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.

Send your message to this supplier

Name *

Company

Email *

Phone

Message *

FAQs

What are Low Emission Valves?

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.

Traditional Valves vs. Low Emission Valves

Comparison Dimension	Traditional Valves	Low Emission Valves
Leakage Rate	Typically ≥1000 ppm (for gases)	≤100 ppm (some can reach ≤10 ppm)
Sealing Structure	Single seal (e.g., packing gland) with poor initial stability, susceptible to temperature changes and impact	Single seal (e.g., packing gland) with long-term extreme stability, unaffected by temperature changes and impact
Testing Requirements	Hydrostatic / Pneumatic tests	Helium leak detection (leakage rate ≤1×10⁻⁷ Pa・m³/s)
Cost	Lower	Slightly higher, but less than 1-2% more than traditional valves
Applicable Media	General industrial fluids	High-risk, high-value, and high environmental protection requirement media

Storage Performance Deficiencies of Traditional Valves

Traditional valves using ordinary graphite packing face dual storage risks.

1. Physical Adsorption Leading to Operational Failure

During long-term static storage, graphite molecules adhere to the valve stem surface due to van der Waals forces, forming a rigid adsorption layer. This increases the valve opening torque by 2-3 times compared to the initial value. In extreme cases, it may cause the actuator to overload and fail.

2. Chemical Corrosion Leading to Seal Degradation

Ordinary graphite packing typically has a sulfur content of ≥1200 ppm (by mass). In storage environments with humidity ≥60%, sulfur reacts with the metal valve stem through electrochemical corrosion, forming a FeS corrosion layer. This enlarges the seal interface gap, causing the leakage rate to increase exponentially over time, with an average annual leakage increase of 30%-50%.

Storage Performance Advantages of Low Emission Valves

Low Emission Valves achieve a breakthrough in storage stability through the following means:

1. Upgraded Material System

Sealing Packing: High-purity sulfur-free graphite (sulfur content ≤0.01%) with ≥99.5% purity is used. The interlayer bonding is enhanced through nano-scale flake orientation technology, blocking the migration path of sulfur elements.

Mid-flange Gasket: Modified flexible graphite composite material with 15%-20% nickel-based alloy reinforcement is used to form a corrosion-resistant skeletal structure.

2. Performance Verification Data

Traditional Valves: Opening torque increases from 80 N•m to 220 N•m, and leakage rate rises from 500 ppm to 2800 ppm.

Low Emission Valves: Opening torque fluctuation is ≤±5%, and leakage rate remains below 20 ppm, fully meeting the stringent long-term storage performance requirements of API 624.

How We Manufacture 100% 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.