Tag Archives: oil seals

Types of Transmission Oil Seals: Static and Dynamic

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There are two main types of oil seal: static and dynamic. A static oil seal fits between two non-moving parts, a dynamic oil seal between a stationary part and a moving one. Most oil seals are made of synthetic rubber.

 

An example of a static seal is a simple ‘O’ ring. These seals can be found in such places as the oil filter used on combined automatic gearbox and engine units, on conventional gearbox front covers and in automatic gearboxes.

 

Dynamic seals are more complex in shape, with one or two lips, depending on where they are situated. These transmission oil seals are widely used in the transmission system of both front and rear-wheel-drive cars, where oil must be sealed in where a rotating shaft passes through a component. For example, at the outer end of a half shaft and on the differential pinion.

 

Types of Oil Seals

Dynamic seals also contain a thin coiled spring, called a ‘garter spring’, which holds the sealing lip in contact with the revolving shaft.

 

Many seals have a metal outer casing for added strength and ease of fitting. Because the seal is in constant contact with a moving part, dynamic seals eventually wear and begin to leak, and both dynamic and static seals deteriorate with age.

 

Most seals are inexpensive and easy to replace, but many are in places where you must do a lot of dismantling to get at them.

 

For example, gearbox oil seals (apart from the extension-housing seal on rear-wheel-drive cars) can be replaced only with the gearbox removed – a task best left to a garage.

 

However, the seals on the rear axle and final drive should all be possible to replace fairly easily, although special tools may be necessary.

 

After many miles and several new seals, the moving part against which the dynamic seal fits may wear.

 

Slight wear can sometimes be taken up by fitting a shim between the seal and its housing, to change the point of contact. But if a shaft becomes seriously grooved it must be replaced or repaired at a garage or engineering machine shop.

 

This is not a common occurrence, but any point at which a shaft rotates in a seal is a possible leak source. Check such points regularly.

 

When fitting and handling any oil seal, keep it and its sealing point absolutely free from dirt and grit. Make sure you fit the seal the right way round. The lip (or lips) always faces the oil it is sealing.

 

To get more information of transmission oil seals, I sincerely recommend you to visit ASA Oil Seals Co., Ltd. – they are the professional oil seal manufacturer in the industry. If you need much more choice of oil seals, please contact with ASA immediately!

 

Article Source: https://www.howacarworks.com/transmission/replacing-transmission-oil-seals

Something You Should Know About Rubber Oil Seal…

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What is Rubber Oil Seal?

 

If you ever notice dark smoke coming from the tail pipe of your car, chances are the rubber oil seals in your vehicle are leaky. The rubber oil seals are also called as oil seals, car oil seals, automotive oil seals and oil seal rings. Leaky oil seals fail to prevent liquids and gases from escaping, and thus oil begins to leak into places in your vehicle where it is not supposed to be. For instance, oil enters the fuel mixture and burns, resulting in the smoky combustion. Thus, we see that these rubber oil seals or oil gaskets are nothing but components that fit on valves and pipes for sealing oil inside the required compartments in your vehicle. Their design features a flexible lip that rubs against a shaft or housing and prevents the leakage or ingress of fluids and dirt from/ into the sealed compartment.

 

Advantages of Rubber Oil Seals:

 

Now rubber oil seal rings perform two important functions: they hold the oil in place, lubricating the moving machine parts, thus reducing friction, grinding and heat in the process. Additionally, these car oil seals keep foreign contaminants from entering and ruining the oil in your car. However, though these automotive rubber seals are popularly referred to as “oil seals”, they are used to retain or confine any form of fluid inside a particular device, especially devices such as hydraulic systems that feature a host of moving parts.

 

Types of Rubber Oil Seals:

 

  • U-Ring Seals
  • V-Ring Seals
  • Rotary Oil Seals
  • Labyrinth or Clearance Seals
  • Bearing Isolators
  • Spring-Installed Seals

 

Why Rubber is the Preferred Material for Oil Seals?

 

Though oil seals also come in materials like plain felt, leather and metal, the best ones are the oil seals made of different varieties of rubber. Seals fashioned from Nitrillic rubber is used with mineral oils, grease, diesel and water. Polyacryllic and silicon seals on the other hand are used for sealing motor oils, while flour elastomer rubber oil seals that have the capacity to withstand a wide range of temperature are normally used in different variety of fuel-related oils. Enlisted below are a few reasons that make rubber the most suitable material for manufacturing oil seals or oil seal rings:

 

  • Can easily withstand high temperature and pressure.
  • Have superior ozone resistance.
  • Feature excellent mechanical strength.
  • Can be easily shaped into different contours and patterns.
  • Are comparatively easier to install.
  • Require less maintenance and provide years of hassle free service.

 

Factors to Consider While Buying Rubber Oil Seals:

 

  • Type of polymer used in manufacturing
  • Shaft outer diameter
  • Seal inner diameter
  • Maximum operating speed
  • Maximum operating temperature
  • Maximum operating pressure
  • Vacuum rating

 

Are you going to look for the high quality rubber oil seals manufacturers and products? I recommend that you can try to visit Chain Yeeh Industrial Co., Ltd. (PHLE). They provide many kind of materials and types rubber oil seal for your choosing, and they also doing customize according to customer’s requirement.

 

 

Article Source: http://www.silentblocbush.com/rubber-oil-seals.html

What are Symptoms of Bad Valve Seals?

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Valves regulate the amount of fuel and air mixture allowed in the cylinders for combustion. While the valves have guides or sleeves to keep combustion gases from passing through them, the seals on the top of the valves keep oil in the valve cover from being sucked down into the engine. Seals, typically made of high-strength rubber, fit over the top of the valve stem inside a small collar. When valve seals begin to wear or fail they produce some obvious and unique symptoms.

 

Cold Engine

One of the most noticeable signs of worn or cracked valve stem seals will be just after a cold engine start. If the vehicle has been sitting for any length of time or even overnight, the top of the head inside the valve cover will be coated with residual oil that was pumped up earlier during running operation. The rubber valve seal has also cooled during nonoperation, which causes it to contract and leave a small gap. When the engine first starts up, residual oil gets sucked down through the bad seal and into the combustion chamber. A large cloud of blue-white smoke will be seen exiting the tailpipe just after start-up.

 

Idle and Stop and Go Driving

Bad valve seals will show themselves during prolonged idling at stop signs or stop lights in congested city conditions. When the vehicle sits at idle for prolonged periods, high levels of vacuum at the intake manifold result because the throttle valve remains closed. The high vacuum attracts oil in the heads to congregate around the valve stems. Upon acceleration, the oil gets sucked past the eroding seal and down through the valve guide, where it burns in the exhaust. Huge clouds of blue-white smoke exit the tailpipe after each acceleration from a stop. The burning smoke will disappear during cruising or highway speed.

 

Off-Throttle Braking

Evidence of valve seals being compromised will show up during off-throttle braking, especially when descending a steep downgrade where the accelerator pedal remains static. With the creation of high intake manifold vacuum, coupled with the downward slant of the engine, oil collects toward the front of the valve cover over the head. Upon pushing the accelerator after a long coast, burned oil will exit the tailpipe in copious amounts. The engine will continue to burn the oil longer in this case, but it will still be a temporary condition until finally the smoking stops under normal cruise.

 

Oil Consumption

Bad valve seals will cause excessive oil consumption. In an otherwise normal engine with good compression, rings and valve guides, bad seals will cause a loss of oil that can be detected on the oil dipstick. By keeping an accurate record of oil level on the dipstick, a noticeable oil reduction due to the oil being burned along with the fuel will be discovered. Bad seals will be confirmed if no oil leaks can be found on the engine to account for the loss.

 

Excessive Smoke

If the valve seals have deteriorated enough, the blue-white exhaust smoke will last longer after start-up and acceleration. Yet the smoke will eventually disappear after long engine operation or during periods of hot weather. Bad valve seals nearly always show an intermittent problem of oil burning, whereas worn piston rings and valve guides will smoke during all times of engine operation and never disappear.

 

Get more information about valve seals, please do not miss the website of AOK Valve Stem Seals Ltd... The company can provide a variety of valve seals, o rings, and bonded seals for you. Try to check out their product pages and feel free to send inquiry to AOK for more details.

 

 

Article Source: It Still Runs

Oil Seals: Affordable Way to Pack Oils

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Seals are vital in packaging. These are significant which take care of the packed products. They feed the drawbacks that are faced in packaging. Leakage and entry of fluids or dirt can be prevented in the packed item.

In our daily routine, we use many products which are properly packed for safety and security. Packaging plays major part when its about loading liquids and fluids. Oil seals are effective in acting as barrier which not only prevent the inner item from spilling but also obstruct external dirt from getting indulged into the packed item.

Hydraulic oil seals maintain high pressure in the packed material. Hydraulic oil seals are fabricated for reciprocating motion and the common applications. Construction of these seals decides their types also forming basis of the applications.

Peeping into the oil seal environment, consisting a shaft that rotate inside a housing or bore. Friction results in some clearance which is between the shaft and the bore. This seal restrict the movement of liquid from coming outside the shaft and housing. Sealing element, the metal case and the spring are the three basic components of the oil seal.

O-rings are also known for packing which being mechanical gasket and shaped like that of torus. O-ring can be used in static applications or also in dynamic applications where the relative motion is present. Rotating pump shafts and hydraulic cylinder pistons are the common usage of dynamic applications. These rings are simplest yet highly engineered with precise dimension and designing.

Square- Rings are designed to meet various applications. These rings are capable of meeting industrial and military specifications. Square-rings are made calculating mechanical stress of the contacting surfaces. These seals can capture high pressure and also do not fail mechanically.

Packaging of bottles, jars and tubes take place aiding screw-Cap, another type of closure. This type of closure is screwed on and off on the container. Container threads or lugs can be brought into the applications. Effective sealing which is engineered with cost effectiveness, the sealing is easy to open.

Wine industry uses screw cap and it has gained immense support over cork for sealing wine bottles. Screw cap can be screwed onto the threads of the neck of a bottle.

Sealing not only save packed items from leaking and getting dirty but genuineness can also be checked. It also denotes that the item is not used and is original. Manufacturing industry has been advantageous with the applications of sealing. The packed material can also be saved from getting spoiled or wasted when safely sealed with different types of seal.

I am a professional business writer. I have written many articles for various industries. Here I am writing this article for “Mim Plastics” who deals in Oil Seals, O-ring & Rubber Packing seals and many other types’ seals and rings.

Article Source: http://EzineArticles.com/?expert=Kumar_Sanjay

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Introduction to Oil Seals

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Grease oil seals, dirt seals, oil seals and fluid seals may be called by different names, but they are designed to deliver the same task. Perhaps their most important job is to close the spaces between moving and stationary parts in every kind of mechanical equipment. Grease and oil seals are essential to modern-day living in order to achieve a high level of efficiency and performance in different industries, such as automotive, agricultural, industrial and manufacturing equipment, to provide the products, vehicles and services we all benefit from.

Each kind of bearing is made of very important components and oil seals protect all of them to let them always be reliable and maintain the safety of precisely constructed assemblies, even during the harshest applications.

Aside from closing the gaps or spaces in a variety of machines, vehicles and tools, grease seals protect them from harmful contamination. Oil seals are helpful to machines since they maintain important parameters, like lubrication. At the same time, they keep away harmful things from their delicate and reliable components and parts, such as contaminants, debris and dirt.

Oil seals do not only prevent abrasives, contaminants and moisture from gaining access into the machine tools and components, but they also make sure that different liquids do not mix with each other. For example water and lubricants that are oil-based.

There are various oil seal designs available, which are created to address the needs of different industries. Though it may seem that they are all alike, the real design, configuration and materials that are utilized can make a considerable difference in some applications. There are types of items that are designed to get rid of friction and torque, allowing the seal to be in motion together with the bearings, together with the other components of the machine as well as to provide protection against any contamination. Other varieties are made to provide greater efficiency. Whatever they require, the industries have produced designs and concepts in order to give the performance that each and every application needs. Some of these types of seals are as follows:

  • O-ring
  • Multiple lip
  • Labyrinth
  • V-seals Light duty
  • Light duty
  • Heavy duty
  • Oil ring s
  • And others…

With regards to regular applications, a dirt seal is typically installed next to the bearing. This should either be sealed in or out, according to the requirements of the machinery and depending on the range of solids, liquids or gases that stumble upon a particular mechanism. Therefore, it extremely important to know in what kind of environment an oil seal will operate before choosing the sealing element or lip material.

In doing so, the appropriate type of seal can surely be obtained for a particular mechanism or function. Fluid seals can be made from a wide range of materials and compounds. Industrial seal types also come in a variety of sizes. Metric and high temperature grease seal varieties are also available. In this regard, it is crucial to have an accurate sealing design that matches the original equipment in order to get a consistent, precise and reliable operation.

You may not have considered using grease and oil seal, but it is good to realize their importance to our everyday living and the things we use. Considering how the other things around you are manufactured, you will realize the impact given by a tiny component such as a grease oil seal.

Do you need a trusted supplier of Houston oil seals?

Article Source: http://EzineArticles.com/?expert=Karina_Popa

Article Source: http://EzineArticles.com/8515781

ASA – A Leading manufacturer provides quality oil seals

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About ASA

ASA is expert in designing and producing oil seal tooling. In 1994 ASA purchased a new state of the art CNC tool production machine. We produce oil seal tooling from OD 12 mm to OD 300 mm, depending on the type of oil seal required. All aspects of oil seal manufacturing from inspection of materials, testing of samples, compression molding through packaging are done in-house. We follow the quality control standards as per our ISO certification, but will meet your higher standard of a 100% inspection. It is our goal to protect you and your customer with the highest quality possible, so that we might maintain a long term relationship.

  • In 1988, ASA company was established.
  • In 1992, ASA created its own trademark ASA, and sold ASA products to the world market.
  • In 1997, ASA adopted the famous Japanese 5S system designed to optimize factory efficiency and quality.
  • In 1999, ASA re-built and expanded its factory.
  • In 2000, all the machines used in the factory became vacuum compression machines. By using this kind of machine, ASA reduces defective rates and increase production efficiency.
  • In 2001, ASA was approved by UKAS, U.K. to be an ISO 9001 company with the international quality guarantee system.
  • Products: oil seals, and all kinds of rubber parts
  • Applications: automobile, motorcycles, agricultural machinery, trucks, buses, trailers, exercise equipment etc.
  • Markets: Taiwan, Europe, America, Asia, Africa, Middle East etc.

Oil Seal Series

Painted OD Seal SeriesSpecial Oil Seal Series

RM(RB), Gamma Ring SeriesVK-HP, High Pressure, End Cap Series

Oil Seal Series For U.S. TractorsTC Type Series Oil Seals

 

We are not limited to the four common elastomers mentioned above but can work with almost any elastomer you might require such as, ethylene propylene ( ERDM ), ethylene acrylic ( EA ), chloroprene ( CR ), high/low temperature nitriles, conductive rubbers, carboxylated rubber etc. We have a state of the art laboratory and can modify elastomers in many to include temperature, abrasion resistance, high rpm, durometer etc.

Oil Seals of ASA, a professional Oil Seal Manufacturer and Supplier

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ASA is an experienced oil seal manufacturer with more than 10 years experiences in oil seal tooling design and manufacturing. ASA offers oil seals for European cars, U.S. tractors, agricultural machinery and more. To ensure the quality of the oil seals, all the products have been made as per ISO certification. Besides, ASA will provide free ASTM 2000 elastomer test reports and free slabs and bottons for your independent testing of each oil seal. View the product category below to have further details of ASA products and welcome to send your inquiries.

Products:

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Description :
1. Product name: Painted OD Oil Seal Series.
2. Applications: automobile, motorcycles, agricultural machinery, trucks, buses, trailers, exercise equipment, etc.
3. Markets: Taiwan, Europe, America, Asia, Africa, Middle East, etc.

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Description :
1. Product name: special seal series.
2. Applications: automobile, motorcycles, agricultural machinery, trucks, buses, trailers, exercise equipment, etc.
3. Markets: Taiwan, Europe, America, Asia, Africa, Middle East, etc.

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Description :
1. Product name: VK-HP, High Pressure, End Cap Series.
2. Applications: automobile, motorcycles, agricultural machinery, trucks, buses, trailers, exercise equipment, etc.
3. Markets: Taiwan, Europe, America, Asia, Africa, Middle East, etc.

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Description :
1. Product name: seal series for U.S. tractors.
2. Applications: automobile, motorcycles, agricultural machinery, trucks, buses, trailers, exercise equipment, etc.
3. Markets: Taiwan, Europe, America, Asia, Africa, Middle East, etc.

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Description :
1. Product name: U-packing series.
2. Applications: automobile, motorcycles, agricultural machinery, trucks, buses, trailers, exercise equipment, etc.
3. Markets: Taiwan, Europe, America, Asia, Africa, Middle East, etc.

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Description :
1. Product name: bonded seal series.
2. Applications: automobile, motorcycles, agricultural machinery, trucks, buses, trailers, exercise equipment, etc.
3. Markets: Taiwan, Europe, America, Asia, Africa, Middle East, etc.

ASA has had more that 10 years experiences in designing and producing oil seal tooling. In 1994 ASA purchased a new state of the art CNC tool production machine. ASA produces oil seal tooling from OD 12 mm to OD 300 mm, depending on the type of oil seal required. ASA likes new challenges, so your R&D tooling projects are welcome. Belows are the history of ASA: