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Showing posts from July, 2023

How do you size an oil seals?

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   An oil seal is an essential component in numerous machinery and automotive applications, preventing leakage of lubricants and fluids. Properly sizing an oil seal is crucial to ensure optimal performance and prevent any potential leaks. In this article, we will explore the step-by-step process of correctly sizing an oil seal.   The first step in sizing an oil seal is to determine the shaft diameter. Measure the diameter of the rotating shaft that the seal will be fitted onto using a precise measuring tool, such as a caliper or micrometer. Ensure that the measurement is accurate and take multiple readings to confirm the diameter.   Once you have the shaft diameter, the next step is to measure the seal bore diameter. This represents the inner diameter of the sealing lip where it comes into contact with the shaft. It is important to measure the seal bore diameter accurately as any deviation can lead to leakage. Again, use a precise measuring tool to obtain an accurate ...

Is an oil seal a lip seals?

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   The question of whether an oil seal is the same as a lip seal is a common one in the world of engineering and mechanical applications. To answer this question, it's important to understand the function and characteristics of both types of seals.   Firstly, let's define what an oil seal is. An oil seal, also known as a shaft seal, is a device used to prevent the leakage of fluid, typically oil, from a rotating or moving component. It is designed to create a barrier between the internal and external environments, ensuring that oil stays within the desired area. Oil seals are commonly used in engines, gearboxes, and other machinery where the containment of fluids is crucial.   On the other hand, a lip seal, as the name suggests, has a lip or a sealing element that makes contact with the shaft or housing. It is a type of radial seal, which means that it seals in a direction perpendicular to the shaft. Lip seals are versatile and can be used for various applications,...

The Advantages of TC Oil Seals

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   TC oil seals, also known as dual-lip or double-lip oil seals, are widely used in various industries to prevent oil and lubricants from leaking out of rotating shafts. This article aims to provide a factual and coherent explanation of the advantages of TC oil seals, highlighting their key features and benefits.   Key Features of TC Oil Seals:   1. Dual-Lip Design: TC oil seals are designed with two sealing lips – the primary lip and the secondary lip. The primary lip is responsible for preventing oil leakage, while the secondary lip acts as a back-up seal, offering an additional layer of protection against leaks.   2. Spring-Loaded Lip: TC oil seals incorporate a spring behind the sealing lips, which provides consistent pressure against the shaft. This spring-loaded design ensures optimal contact between the sealing lips and the shaft, enhancing the sealing efficiency and reducing the risk of oil leakage.   Advantages of TC Oil Seals:   1. Excellent Sealing Perform...

Is it OK to reuse O-rings?

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   O ring are commonly used in various industries for their sealing capabilities. They create a tight seal between two parts, preventing leakages and ensuring the proper functioning of machinery and equipment. As O ring are subjected to wear and tear over time, the question arises: is it acceptable to reuse O ring? In this article, we will examine this question and explore the factors to consider when deciding whether to reuse O ring.   The decision to reuse an O ring depends on several factors, including its condition, material, and application. Firstly, the condition of the O ring must be thoroughly assessed. If an O ring shows signs of damage, such as cracking, tearing, or deformation, it is not suitable for reuse. Damaged O ring may not provide an effective seal, leading to leaks and potential equipment failure. Therefore, it is crucial to inspect O ring carefully before considering their reuse.   The material of the O ring is also an important factor. O ring are m...

Does the color of an O-ring mean anything?

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   O-rings are widely used in various industries for sealing purposes. They are circular rubber rings that are designed to fit into a groove and create a seal between two parts. O-rings come in different sizes, materials, and colors. While the size and material of an O-ring are crucial factors to consider, many people wonder if the color of an O-ring has any significance. In this article, we will explore this question and shed light on the importance of O-ring colors.   Firstly, it is important to note that the color of an O-ring does not have any direct impact on its functionality or performance. The primary purpose of an O-ring is to create a reliable seal, and this is determined by its size, material, and the design of the groove it fits into. The color of an O-ring is simply a visual characteristic and does not affect its sealing capabilities.   However, the color of an O-ring can be used as an indicator for specific applications or materials. In some industries, d...

What seals can be used in rotating shafts?

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   What seals can be used in rotating shafts? This question arises when considering the various options available for effectively sealing rotating shafts. The selection of the appropriate seal depends on several factors, including the nature of the application, the operating conditions, and the desired level of sealing performance.   One commonly used seal for rotating shafts is the lip seal, also known as a radial shaft seal. Lip seals consist of a flexible lip that is in contact with the rotating shaft, creating a barrier to prevent leakage. The lip can be made of various materials, such as rubber or polyurethane, depending on the specific application requirements. Lip seals are often suitable for low to moderate rotational speeds and can effectively seal against liquids and gases.   Another type of seal frequently used in rotating shafts is the mechanical seal. Unlike lip seals, mechanical seals do not rely on direct contact with the shaft. Instead, they employ a co...

How much does it cost to replace oil seal?

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   How much does it cost to replace oil seal?This is a common question among vehicle owners who are faced with the need for this repair. The cost of replacing an oil seal can vary depending on several factors, including the type of vehicle, the location of the seal, and the labor costs of the repair shop.   Firstly, the type of vehicle plays a significant role in determining the cost of replacing an oil seal. Luxury or high-end vehicles often have more complex engine designs, which can make the replacement process more time-consuming and expensive. On the other hand, smaller and simpler vehicles may have a more straightforward oil seal replacement, resulting in lower costs. Therefore, it is essential to consider the make and model of your vehicle when estimating the cost.   Secondly, the location of the oil seal also affects the overall cost. Some oil seals are located in easily accessible areas, making them relatively simple to replace. In such cases, the cost is lik...

What is a floating seal?

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   Floating seal, also known as a mechanical face seal or heavy duty seal, is specifically engineered for rotating applications in extremely harsh environments where they withstand severe wear and prevent the ingress of harsh and abrasive external media. It is a high-performance seal that integrates floating ring seal, gap seal, and comb tooth seal, and uses the tension of the oil film to effectively prevent leakage.   There are two different types of Mechanical Face Seals: Type DO, which uses an O-Ring as a secondary sealing element, and Type DF, which has an elastomer with a diamond-shaped cross-section as a secondary sealing element instead of the O-Ring. Both types consist of two identical metal seal rings mounted in two separate housings face-to-face on a lapped seal face. The metal rings are centered within their housings by an elastomer element. One half of the Mechanical Face Seal remains static in the housing, while the other half rotates with its counter face...

Do o-rings need to be exact size?

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   O-rings are circular rubber seals that are used to prevent leakage of fluids or gases in various applications, such as plumbing, hydraulic systems, pneumatic systems, and automotive parts. O-rings are available in different sizes, materials, and hardness levels to suit different needs and environments. But do o-rings need to be exact size? How can we determine the proper o-ring size for a given application?   The answer is yes, o-rings need to be exact size, or at least within a certain tolerance range, to ensure optimal sealing performance and prevent premature failure. The size of an o-ring is determined by two dimensions: the cross-section (CS) and the inside diameter (ID). The cross-section is the thickness of the o-ring, and the inside diameter is the distance from one inner edge of the o-ring to the opposite inner edge.   The cross-section and the inside diameter affect how well the o-ring fits into the groove or cavity where it is installed, and how much it c...

How to maintain and repair a mechanical oil seal?

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   Mechanical oil seal is a type of seal that is used to prevent oil leakage from rotating shafts or housings in various machines and equipment. Mechanical oil seals are also known as shaft seals, radial lip seals, or rotary shaft seals. They are widely used in automotive, industrial, and petrochemical applications, where they help protect the bearings and other components from oil loss, contamination, and wear.   Mechanical oil seal consists of two main parts: a metal case and a rubber lip. The metal case is fixed to the stationary part of the machine, such as the pump casing or the bearing housing. The rubber lip is attached to a spring that presses it against the rotating part of the machine, such as the shaft or the impeller. The rubber lip forms a tight contact with the shaft surface, creating a dynamic seal that prevents oil from escaping or entering the gap between the shaft and the housing.   The rubber lip is usually made of synthetic materials, such as nitril...

How does a water pump water seal work?

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   Water pump water seal is a device that prevents coolant leakage from the water pump, or prevents air from entering the pump. The water pump is an essential component of the engine cooling system, as it circulates the coolant fluid throughout the engine and the radiator, where it dissipates heat. A faulty water pump water seal can cause serious problems for the engine, such as overheating, corrosion, or reduced performance.   How does a water pump water seal work?   The water pump water seal consists of two main parts: a stationary part and a rotating part. The stationary part is attached to the water pump casing, while the rotating part is connected to the impeller shaft. The impeller is a fan-like device that spins and pushes the coolant through the pump and the cooling system. The water pump water seal creates a tight fit between the stationary and rotating parts, allowing the impeller to spin freely while preventing coolant from escaping or air from entering.   ...

Choosing the Best Material for Oil Resistant Seals

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   When it comes to selecting the ideal material for oil-resistant seals, there are several factors to consider. Oil seals play a crucial role in preventing fluid leakage and ensuring the efficient functioning of machinery and equipment. This article aims to provide insights into the best material options available for oil-resistant seals, based on their unique properties and applications.   Factors to Consider:   1. Chemical Compatibility:   The material used for oil-resistant seals should exhibit excellent compatibility with the specific type of oil or lubricant it will come into contact with. It is essential to consider the resistance of the material to the chemical components present in the oil. Compatibility charts and expert advice can facilitate the selection process.   2. Temperature Resistance:   The material must be capable of withstanding the temperature range of the application without compromising its integrity. Extreme temperatures can degrade seal mat...

Chemical Resistance of Oil Seals: Choosing the Right Option

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   Oil seals are crucial components used in various industrial applications to prevent the leakage of fluids such as oil or lubricants. However, it is essential to consider the chemical compatibility of oil seals with the substances they will come into contact with. This article aims to provide insights into oil seals that exhibit high resistance to chemicals, ensuring optimal performance in challenging environments.   Chemical Resistant Materials:   1. Fluorocarbon Seals:   Fluorocarbon oil seals, commonly known as Viton seals, are widely recognized for their excellent chemical resistance properties. They can withstand exposure to a wide range of solvents, fuels, oils, acids, and alkalis. The unique fluoroelastomer material used in their construction ensures long-lasting durability and reliability even in harsh chemical environments.   2. Perfluoroelastomer (FFKM) Seals:   Perfluoroelastomer oil seals exhibit exceptional resistance to highly corrosive and aggressive...

What is a shock absorber oil seal?

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  A shock absorber oil seal is a vital component in the suspension system of a vehicle. It is responsible for preventing the leakage of hydraulic fluid and maintaining the proper functioning of the shock absorber.   The shock absorber is a crucial part of a vehicle's suspension system, designed to absorb and dampen the impacts and vibrations caused by uneven road surfaces. It plays a significant role in ensuring a smooth and comfortable ride for the passengers.   The shock absorber oil seal is located at the top of the shock absorber, where the piston rod extends out. It acts as a barrier between the piston rod and the outer housing of the shock absorber. Its primary function is to prevent the hydraulic fluid from leaking out and to keep contaminants from entering the shock absorber.   The seal is typically made of high-quality rubber or elastomer material that is resistant to wear, heat, and corrosion. It is designed to withstand the harsh conditions and constant moveme...

How do you size hydraulic cylinder oil seal?

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   When it comes to sizing hydraulic cylinder oil seals, there are a few key factors to consider. These factors include the cylinder bore diameter, the rod diameter, the seal groove dimensions, and the operating conditions.   Firstly, the cylinder bore diameter is an important factor in determining the size of the oil seal. The oil seal should have a slightly larger diameter than the bore to ensure a proper fit. This allows for effective sealing and prevents leakage of hydraulic fluid. It is important to accurately measure the bore diameter using precision tools to ensure the correct size seal is selected.   Secondly, the rod diameter is another crucial aspect to consider. The oil seal should fit snugly around the rod to prevent any leakage. It is essential to accurately measure the rod diameter and choose a seal that matches it. If the seal is too loose, it may result in leakage, while if it is too tight, it may cause excessive friction and wear.   Thirdly, the seal ...

How do you make O rings seal better?

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   To improve the sealing performance of O-rings, several factors need to be considered and addressed. O-rings are widely used in various industries, including automotive, aerospace, and manufacturing, for their effective sealing capabilities. By implementing the following measures, O-rings can seal better and ensure the integrity of the systems they are used in.   Firstly, selecting the right material for the O-ring is crucial. Different applications require different materials, such as rubber, silicone, or fluorocarbon. Each material has its unique properties, including resistance to temperature, pressure, chemicals, and wear. By carefully considering the specific requirements of the application, the appropriate material can be chosen to optimize the sealing performance.   Secondly, ensuring proper O-ring size and dimensions is essential. The O-ring should have the correct inner diameter, outer diameter, and cross-section diameter to fit snugly into the groove it is ...

What is the purpose of sealing ring?

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   密封圈的目的是在两个配合表面之间提供有效且可靠的密封,防止液体或气体泄漏。 密封圈广泛应用于汽车、航空航天和制造等各个行业,以确保不同系统和部件的完整性和功能性。   密封圈的主要功能之一是防止液体或气体在压力下逸出。 例如,在汽车发动机中,密封圈可确保燃烧室保持密封,防止燃烧过程中出现任何气体泄漏。 这对于维持发动机的性能和效率至关重要。   密封圈在防止污染物进入方面也发挥着至关重要的作用。 在许多应用中,例如液压系统或管道,必须保持流体清洁且不含任何外部颗粒。 密封圈充当屏障,防止污垢、灰尘或其他污染物进入系统并可能造成损坏或降低其效率。   此外,密封圈有助于维持运动部件的正常运行。 在泵或涡轮机等旋转机械中,密封圈可确保润滑油或其他流体保留在内部,提供必要的润滑以减少摩擦和磨损。 如果没有有效的密封圈,运动部件可能会经历过度摩擦,导致过早失效和昂贵的维修费用。   除了其功能用途外,密封圈还有助于安全。 在涉及危险或有毒物质的行业中,例如化工厂或核电站,防止可能对人类健康或环境构成威胁的泄漏至关重要。 密封圈提供可靠的屏障,最大限度地减少事故或污染的风险。   密封圈的设计和材料选择是决定其有效性和寿命的关键因素。 不同的应用需要不同类型的密封圈,例如 O 形圈、垫圈或唇形密封件。 橡胶、硅胶或金属等材料的选择取决于温度、压力以及被密封的流体或气体的类型等因素。   密封圈的目的是确保两个配合表面之间安全可靠的密封,防止液体或气体泄漏,防止污染物进入,保持正常功能并提高安全性。 密封圈是各个行业的重要部件,有助于提高不同系统和设备的效率、耐用性和安全性。

What are high temperature resistance oil seals?

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   High temperature resistance oil seals, also known as high-temperature oil seals or heat-resistant oil seals, are specialized seals designed to withstand extreme temperatures in various industrial applications. These seals are crucial components in machinery and equipment that operate under high-temperature conditions, such as engines, turbines, furnaces, and compressors.   The primary function of high temperature resistance oil seals is to prevent the leakage of oil or lubricants and to protect the internal components of the machinery from contaminants, such as dust, dirt, and moisture. They are typically made from materials that can withstand high temperatures without losing their sealing properties or degrading.   One of the most commonly used materials for high temperature resistance oil seals is silicone. Silicone oil seals are known for their excellent heat resistance, as they can withstand temperatures ranging from -60°C to 250°C. Silicone oil seals also have ...

What is a high pressure oil seal?

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   High pressure oil seal is a type of rotary shaft seal designed to withstand high pressure applications. These seals are used to retain oil on rotating shafts in mechanical equipment, such as motors, pumps, bearings, and gearboxes.   Like other types of oil seals, high pressure oil seals consist of two main parts: a cylindrical outer covering with an interference fit that seals statically against the housing bore, and a sealing lip that seals dynamically and statically against the shaft. The sealing lip is usually made of an elastomeric material such as rubber or silicone, which provides a flexible seal between the shaft and the housing. A spring is often used to help maintain contact between the sealing lip and the shaft.   High pressure oil seals are designed to withstand higher pressures than standard oil seals. Most oil, grease, and bearing seals with elastomeric seal lips are designed for zero pressure but will provide adequate service up to 3psi (0.2bar) 1. Hi...

What does an oil ring seal do?

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   Oil ring seal is a type of seal used to retain oil on rotating shafts in mechanical equipment, such as motors, pumps, bearings, and gearboxes. These seals are also known as rotary shaft seals or grease seals.   Oil ring seals are designed to close the gap between stationary and moving components in mechanical equipment, most often rotating shafts. They consist of two main parts: a cylindrical outer covering with an interference fit that seals statically against the housing bore, and a sealing lip that seals dynamically and statically against the shaft.   The primary function of an oil ring seal is to prevent lubricant from escaping while also stopping harmful materials, such as dirt, from moving in through the clearance. The sealing lip is usually made of an elastomeric material such as rubber or silicone, which provides a flexible seal between the shaft and the housing. A spring is often used to help maintain contact between the sealing lip and the shaft.   Oil ri...

What are radial shaft seals used for?

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   Radial shaft seals also known as rotary shaft seals or oil seals, are used to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. These seals sit between rotating and stationary components, or two components in relative motion, and consist of two main parts: a cylindrical outer covering with an interference fit that seals statically against the housing bore, and a sealing lip that seals dynamically and statically against the shaft.   The primary purpose of a radial shaft seal is to prevent leaks while also preventing the ingress of contaminants such as dirt, dust, and water. The sealing lip is usually made of an elastomeric material such as rubber or silicone, which provides a flexible seal between the shaft and the housing. A spring is often used to help maintain contact between the sealing lip and the shaft.   Radial shaft seals are used in a wide range of applications, from slow-moving equipment to high-speed rotation, and in temperatures fro...

What is a metric oil seal?

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   Metric oil seal, also known as a shaft seal or rotary shaft seal, is a type of seal used to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. These seals are designed to prevent leaks while also preventing the ingress of contaminants such as dirt, dust, and water.   Metric oil seals are similar to other types of oil seals, but they are sized according to the metric system. This means that their dimensions are specified in millimeters rather than inches. Metric oil seals are commonly used in applications where metric-sized shafts and housings are used.   Like other types of oil seals, metric oil seals typically consist of a sealing element, a inner metal, and a spring. The sealing element is usually made of an elastomeric material such as rubber or silicone, which provides a flexible seal between the shaft and the housing. The inner metal provides structural support for the seal, while the spring helps to maintain contact between the sealing el...

What is the purpose of a double lip oil seal?

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   Double lip oil seal, also known as a dual lip seal, is a type of rotary shaft seal that features two sealing lips. The primary purpose of a double lip seal is to exclude contaminants while retaining lubricants .   Double lip oil seals are commonly used in applications where additional protection against contamination is required. For example, they are often used in marine applications to provide a better seal and protect bearings from water, which can cause damage .   The two lips of a double lip seal serve different functions. The primary lip is responsible for retaining lubricants and preventing leaks, while the secondary lip provides additional protection against the ingress of contaminants such as dirt, dust, and water .   In addition to their primary function of preventing leaks and contamination, double lip seals can also help to reduce friction and wear on the shaft. By maintaining a thin film of lubricant between the sealing lips and the shaft, double lip s...

How long do pump mechanical seals last?

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   The lifespan of a pump mechanical seal can vary depending on several factors, including the operating conditions, the design of the seal, and the maintenance practices used.   Most seal manufacturers state that operation of the seal at one of its limits, such as pressure, speed, or temperature, will result in a minimum lifespan of two years; three years with some seal types such as those specified in Standard API 682. However, these published limits may be overstated or unreliable for cyclic operation.   In practice, some seals manufacturers have successfully implemented programs to improve Mean Time Between Repair (MTBR) and are achieving three years or more average seal life. This has reduced the Life Cycle Cost (LCC) of their pump population.   The lifespan of a pump mechanical seal can vary depending on several factors. Proper selection, installation, and maintenance of the seal can help to extend its lifespan and improve the reliability of the pump.

What are the different types of O ring kit?

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    O-ring kits are collections of O-rings in various sizes and materials, designed to provide a convenient and cost-effective way to keep a range of O-rings on hand for maintenance and repair tasks.   There are several different types of O-ring kits available, including kits containing O-rings made from different materials such as Nitrile (Buna), VitonTM (Fluorocarbon), Silicone, PFA, FEP, and USP Class VI. These materials offer different levels of resistance to heat, chemicals, and other environmental factors, making them suitable for use in different applications.   In addition to kits containing O-rings made from different materials, there are also kits containing O-rings with different profiles, such as square-profile, X-profile, and large O-rings. These profiles offer different sealing characteristics and can be used in different types of applications.   When selecting an O-ring kit, it is important to consider the specific requirements of your application. Fact...

Which material is best for TC oil seals?

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   TC oil seals, also known as skeleton oil seals, are rubber completely covered double-lip oil seals with a self-tightening spring. They are commonly used to isolate the parts that need lubrication in the transmission part from the output part to prevent lubrication oil leakage 1.   There are several materials that can be used to make TC oil seals, including Nitrile Rubber (NBR), Fluorine Rubber (FKM), and Silicone Rubber. NBR is a common material for TC oil seals due to its good resistance to mineral oil-based hydraulic fluids, water, and air. FKM is known for its excellent heat resistance and chemical resistance, making it suitable for use in high-temperature and harsh chemical environments. Silicone Rubber is also used for its good heat resistance and non-toxicity.   When selecting the best material for TC oil seals, it is important to consider factors such as the application’s exposure to water, oil, gas, harsh chemicals or other materials; the minimum and maximum...

Silicone vs Rubber: Which is better for seals?

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   Silicone and rubber are both elastomers and polymers, and they are commonly used as seal materials. However, there are some key differences between the two materials that can affect their performance as seals.   Rubber is a natural material that is grown from plants, while silicone is a synthetic substance made from polymers. Rubber is used in a wide range of products, including soft rubber for everyday items such as balloons, elastic bands, gloves, erasers, and condoms, as well as hard rubber for car tires, combs, and electrical insulation.   Silicone is a synthetic formula with a massive range of applications. It is known for its resistance to extreme temperatures, water, and electricity. Silicone can operate smoothly from -100°C (-150° F) to +250° C (+480° F), making it suitable for use in aerospace engines or ventilation. Silicone is also used in the medical industry due to its safety and non-toxicity.   When deciding between silicone and rubber for seals, it is...