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Bellows Mechanical Seal: All-Metal Construction for Enhanced Chemical and Thermal Compatibility

Bellows Mechanical Seal: All-Metal Construction for Enhanced Chemical and Thermal Compatibility

A mechanical seal using a welded metal bellows has all metals for its construction and provides minimal leakage paths. This design allows for its use in various applications including those utilizing chemically harsh liquids, those that require elevated temperature requirements or those requiring clean process fluids. The simplified design allows for maximum stability with regard to seal face performance at varying pressures, thermal/cyclic conditions and provides excellent compatibility with a variety of pressure/temperature ranges.
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Advantages of Bellows Mechanical Seal

Enhanced Compatibility with Thermal and Chemical Environments

Due to the all-metal nature of the seal, it can handle many different types of industrial fluids.

Reduced Number of Leakage Paths

By minimizing the number of possible points for leakage compared to a design that uses several springs, the bellows assembly supports leak-free performance.

Compact Configuration with Fewer Moving Parts

Fewer moving elements in the construction means less maintenance required to maintain continuous industrial service operation.

Bellows Mechanical Seal

Application Scenarios 🛠 Bellows Mechanical Seal

Centrifugal and Reciprocating Thermal Oil Pumps

Metal bellows seals will have a higher performance when compared to elastomers for centrifugal thermal oil pumping systems and thermal oil recycling processes. After prolonged operation in both applications, metal bellows seals will maintain a consistent face loading through both thermal expansion and thermal contraction.

Chemical Processing Pumping Applications

Applications using metal bellows seals include any chemical processing system that adds solvents and aggressive materials into their system. These seals have corrosion resistant materials allowing for their extended use in media that may otherwise destroy conventional sealing products.

Vacuum Systems and Low-Pressure Process Applications

Low leakage rates and reduced out-gassing risks make the use of metal bellows seals particularly useful in vacuum furnaces and semiconductor manufacturing and laboratory research equipment.

Petrochemical Refining Applications

The typical combination of high temperature cycles and hydrocarbon process media creates a considerable amount of damage through face loading on the seal and metal bellows seals allow for a significant amount of thermal fluctuations and produces less thermal deformations leading to seal failure.

Electric and Gas and Energy Generation Applications

Metal bellows seals have been found useful with many types of power generation applications including boiler feed water pumps, turbine auxiliary systems and any rotating equipment operating under high temperatures or varying loads.

FAQ

What does a bellows do in a mechanical seal?

The bellows provide a consistent sealing force under varying conditions of temperature and pressure.
Mechanical seals with bellows can typically be found in pumps and rotating equipment that handle heated liquids and/or chemically aggressive liquids (heat transfer oils) and/or places where an elastomer may not perform.
The materials used for bellows normally include high-performance alloys, such as stainless steel, nickel-alloys or other corrosion-resistant materials.

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What Our Customers Say

John

“Excellent compatibility with high-temperature applications. Excellent sealing performance at all temperatures.”

Alen

“The performance of the bellows was outstanding with no need for additional adjustment.”

Amy

"The replacement of the bellows was simple, and they have performed perfectly over extended periods of emergency use."

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Why Choose Us

Why Choose Us

Jiangsu Golden Eagle Fluid Machinery Co. Ltd. is a leading global manufacturer of fluid sealing products, and one of China's earliest companies to engage in the mechanical seal industry. We have more than 50 years of manufacturing experience and full capability to supply our customers with a wide range of sealed products.

Jiangsu Golden Eagle's engineering team also provides complete engineering support from the initial design through the final installation, to ensure every customer has an efficient, secure, and easy-to-use sealing system.