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Having been involving in the R&D, design, and production of Fristam Pump Mechanical Seal, Guangzhou Lepu Machinery CO., LTD has become the first choice for many customers. The burgmann mechanical seal series is available in a wide range of types and specifications. Lepu Seal types of mechanical seals for pumps is precisely manufactured. During the production, it adopts various kinds of CNC machines such as cutting machine and punching machine. Lepu ensures that the product quality and appearance are same to the original. This product is characterized by a stable and reliable operation. It can constantly work maintaining its highest level without any sudden break. Lepu seal is made of strong quality stainless steel .

As a socially responsible business, we comply with and exceed all applicable regulatory requirements, such as reducing our use of newspapers and disposable plastics.

Every kind of mechanical seal can only function effectively within the specified range. Improper selection will significantly reduce the sealing performance, shorten the service life, or even fail.

The main parameters of the selection are as follows

1. The medium pressure of the sealed chamber P

The medium has good lubricity, and when the viscosity is high, the unbalanced type is selected for P≤0.8MPa. Medium lubricity is poor, when the viscosity is low, P≥0.5Mpa

2. Linear speed V

V≤25m/s selects the rotary type. When V≥25m/s, the static type is selected.

3. PV value

The PV value relates to the stability (vaporization) of the fluid film between the sealing surfaces and the wear resistance of the friction pair. Examples of PV limit values:

The selection of mechanical seals and the main parameters of mechanical seals that need to be considered in the selection

Four, sealing medium temperature T

In the absence of external cooling, the maximum temperature of the mechanical seal generally depends on the safe use temperature of the auxiliary sealing material. See the table below:

The selection of mechanical seals and the main parameters of mechanical seals that need to be considered in the selection

Five, the particularity of the medium.

1. Viscosity: Balanced type should be selected for low-viscosity medium which is easy to dry friction. For high-viscosity medium, forced transmission structure should be adopted.

2. Corrosion and chemical solvents: a. Strong corrosion should be sealed with external PTFE bellows.

b. The applicable table of auxiliary seals in different chemical media is as follows:

Material Purpose

Nitrile rubber (NBR)

Mineral oil, gasoline, volatile oil, potassium carbonate, potassium hydroxide, water, phosphoric acid, etc.

Silicone rubber (MVQ)

Butanol, low swelling mineral oil, weak acid, weak base, ammonia water, etc.

Ethylene Propylene Rubber (EPR)

Acetone, alkali, sulfur dioxide, potassium dichromate, hydrogen peroxide, ammonia water, etc.

Viton (FPM)

Hot oil, steam, inorganic acid, butanol, chlorine solvent, etc.

Chlorohydrin rubber (FCO)

Freon

Polytetrafluoroethylene (PTFE)

Acids, alkalis, solvents and various media

3. Containing suspended solid particles: Tungsten carbide/tungsten carbide, or silicon carbide/silicon carbide should be used as the material of the dynamic and static rings. When the particles are easy to block the sealing cavity, the flushing solution filtered or separated by the auxiliary device must be used to flush the end face.

4. Highly toxic or gaseous medium: Double mechanical seals should be used.

The principle and function of mechanical seal






Mechanical seals are divided into two types: external and internal:
The main difference between them is that the position of the medium on the sealing surface and the direction of leakage are different. The built-in type bears better force. Since its leakage direction is opposite to the direction of the centrifugal force of the rotating shaft, the leakage is smaller.
The leakage direction of the external type is consistent with the centrifugal force of the rotating shaft, so it is more likely to leak. However, the external spring generally does not contact the medium and can effectively prevent the corrosion of the medium. It is often used for sealing corrosive low-pressure media.

Tungsten Carbide Mechanical Seals: Engineered for Maximum Seal Life

Introduction:

Mechanical seals play a crucial role in various industries where leakage prevention is of utmost importance. These sealing devices are responsible for maintaining the integrity of rotating equipment, ensuring maximum operational efficiency, and preventing costly downtime. Among these sealing solutions, tungsten carbide mechanical seals have emerged as a top choice for industries worldwide. Engineered to provide unparalleled durability and longevity, tungsten carbide mechanical seals have revolutionized the sealing industry. In this article, we delve into the intricate details of tungsten carbide mechanical seals, highlighting their exceptional characteristics, innovative design, and essential applications.

Understanding Tungsten Carbide Mechanical Seals:

Tungsten carbide mechanical seals are designed to provide a reliable and robust sealing solution in demanding operational environments. They consist of two primary components: a stationary seal ring and a rotating seal ring. These rings are meticulously crafted from tungsten carbide, a hard and dense material known for its exceptional strength and wear resistance. The combination of tungsten and carbon results in a composite that surpasses traditional sealing materials in terms of performance and lifespan.

The Benefits of Tungsten Carbide Mechanical Seals:

1. Unmatched Durability:

Tungsten carbide mechanical seals are engineered to withstand extreme conditions, making them highly durable. The exceptional hardness of tungsten carbide ensures resistance to abrasive and corrosive media present in many industrial applications. This durability significantly extends the operational life of the seal, reducing maintenance costs and enhancing overall equipment reliability.

2. Superior Wear Resistance:

The inherent properties of tungsten carbide make it exceptionally resistant to wear, abrasion, and friction. When used as a sealing material, tungsten carbide mechanical seals exhibit excellent resistance to surface damage caused by contact with moving parts. This wear resistance guarantees prolonged seal life and eliminates the need for frequent replacements, thereby minimizing downtime and optimizing productivity.

3. Enhanced Performance in High-Pressure Environments:

Tungsten carbide mechanical seals are engineered to deliver exceptional performance even in high-pressure applications. The robust nature of tungsten carbide allows these seals to effectively handle high-pressure differentials without compromising on sealing effectiveness. This capability makes them ideal for use in pumps, compressors, and other rotating equipment operating under demanding conditions.

4. Versatility in Various Fluid Handling Applications:

Tungsten carbide mechanical seals find extensive applications across diverse industries. From chemical processing plants to oil refineries, these seals impart sealing effectiveness in various fluid handling processes involving corrosive, high-temperature, and abrasive media. Their versatility allows industries to achieve optimal sealing performance in critical operations while ensuring the safe and efficient handling of fluids.

5. Reduced Leakage and Environmental Impact:

One of the primary goals of mechanical seals is to prevent leakage, safeguarding both the equipment and the environment. Tungsten carbide mechanical seals offer exceptional sealing capabilities, minimizing the risk of fluid leakage. By reducing leakage, these seals help industries adhere to stringent environmental regulations and ensure safe working conditions for personnel operating in close proximity to the equipment.

The Innovative Design of Tungsten Carbide Mechanical Seals:

Tungsten carbide mechanical seals are crafted with precision and designed to facilitate easy installation and maintenance. Their innovative design includes features such as self-aligning capabilities, multiple spring arrangements, and balanced seal faces. These design elements enhance the overall performance, reliability, and ease of use of tungsten carbide mechanical seals.

Applications of Tungsten Carbide Mechanical Seals:

1. Oil and Gas Industry:

In the oil and gas sector, which operates under extreme conditions, sealing solutions are critical to prevent leakage and ensure safe operations. Tungsten carbide mechanical seals find extensive usage in pumps, mixers, and other equipment involved in extraction, refining, and transportation processes. The ability of these seals to withstand high-pressure differentials and resist corrosive fluids makes them indispensable in the oil and gas industry.

2. Chemical Processing:

Chemical processing plants often handle aggressive chemicals and abrasive media, making leak prevention a top priority. Tungsten carbide mechanical seals provide a reliable solution to seal pumps, mixers, agitators, and reactors in these facilities. Their excellent resistance to chemicals and abrasion allows for sustained performance in demanding chemical processing environments.

3. Wastewater Treatment:

Efficient sealing is vital in wastewater treatment facilities to prevent contamination and ensure environmental safety. Tungsten carbide mechanical seals prove valuable in pumps and mixers used for aeration, sludge handling, and water circulation. Their durability and resistance to corrosion enable reliable sealing in the harsh and corrosive wastewater treatment environments.

4. Mining and Mineral Processing:

Mining and mineral processing involve handling abrasive slurries, corrosive chemicals, and high-pressure fluids. Tungsten carbide mechanical seals thrive in this challenging environment, providing effective sealing solutions for high-pressure pumps, crushers, and hydrocyclones. The resilience of these seals significantly reduces downtime and maintenance costs associated with mineral processing operations.

5. Food and Beverage Industry:

Maintaining hygienic and contamination-free processes is critical in the food and beverage industry. Tungsten carbide mechanical seals offer reliable sealing solutions for pumps and mixers involved in food processing, beverage production, and dairy operations. Their resistance to corrosion and wear ensures the integrity of processes while adhering to stringent food safety standards.

Conclusion:

Tungsten carbide mechanical seals have emerged as a superior choice for industries seeking long-lasting and reliable sealing solutions. With their exceptional durability, wear resistance, and versatile performance characteristics, tungsten carbide mechanical seals have revolutionized the sealing industry. From high-pressure pumping applications to corrosive chemical handling, these seals thrive in challenging operational environments, reducing downtime, minimizing leakage, and ensuring safe and efficient processes. As industries continue to prioritize operational efficiency and reliability, tungsten carbide mechanical seals prove to be an invaluable asset, enhancing overall productivity and profitability.

Article:

Introduction:

Operational challenges are a common hurdle faced by process industries. From ensuring smooth production to maintaining optimal efficiency, businesses are constantly seeking solutions to overcome these obstacles. One such solution that has gained significant popularity is the implementation of John Crane Mechanical Seals. These seals have proven to be highly effective in various process industries. This article delves into the unique features and benefits of John Crane Mechanical Seals, and how they help in overcoming operational challenges.

1. The Importance of Mechanical Seals in Process Industries:

Mechanical seals play a crucial role in process industries by providing a high level of sealing reliability. They are designed to prevent leakage and ensure the containment of fluids in pumps, compressors, and other rotating equipment. This is of utmost importance in process industries, where even a minor leak can have severe consequences, such as environmental contamination or loss of valuable resources.

2. Understanding the Design and Construction of John Crane Mechanical Seals:

John Crane Mechanical Seals are engineered with precision and meet the highest industry standards. They consist of several components, including a stationary seal face, a rotating seal face, and secondary sealing elements. The combination of these components ensures efficient sealing under various operating conditions, such as high pressure, temperature, and media compatibility.

3. Enhanced Reliability and Reduced Downtime:

One of the primary operational challenges faced by process industries is unexpected equipment failure, leading to costly downtime. John Crane Mechanical Seals address this challenge by providing enhanced reliability. The robust construction and advanced sealing technology employed in these seals minimize the risk of failure, thereby reducing unplanned downtime and its associated costs.

4. Improved Efficiency and Energy Savings:

Process industries are constantly striving to improve efficiency and reduce energy consumption. With the implementation of John Crane Mechanical Seals, companies can achieve these goals. These seals are designed to minimize friction and power loss, resulting in improved equipment efficiency and reduced energy consumption. This not only contributes to lowering operational costs but also helps organizations achieve their sustainability objectives.

5. Environmental Benefits:

Meeting stringent environmental regulations and reducing carbon footprint have become top priorities for process industries. John Crane Mechanical Seals can contribute to these objectives by eliminating leakages and emissions. The precision-engineered design ensures a tight seal, preventing harmful substances from entering the environment and reducing the need for disposal of leaked fluids.

6. Simplified Installation and Maintenance:

Another operational challenge faced by process industries is the complexity of equipment installation and maintenance. John Crane Mechanical Seals offer a simplified solution in this regard. These seals are designed for easy installation, with intuitive instructions provided by the manufacturer. Additionally, their robust construction requires minimal maintenance, reducing the overall maintenance costs and enhancing operational efficiency.

7. Customized Solutions for Specific Applications:

Process industries are diverse, and each industry has its own unique requirements and operating conditions. John Crane recognizes this and offers customized solutions for specific applications. Whether it's a high-pressure pump or a corrosive media, John Crane Mechanical Seals can be tailored to meet the specific demands of each industry. This level of customization ensures optimal performance and helps in overcoming operational challenges effectively.

Conclusion:

Operational challenges will always be a part of the process industries. However, with the implementation of advanced technologies like John Crane Mechanical Seals, these challenges can be addressed effectively. The enhanced reliability, improved efficiency, and simplified maintenance offered by these seals make them an excellent choice for industries seeking to overcome these hurdles. By investing in reliable sealing solutions, process industries can ensure smoother operations, minimize downtime, and maximize productivity.