Seal-Valve Stem 90913-02101 For Japanese Auto Engine

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Valve Stem Oil Seal :

This 8-94396609-2 valve stem oil seal from Isuzu is an essential part for anyone who needs to keep their engine running correctly. It's designed for use with Isuzu engines, but can work in most other brands of engines. It's a small, but important part of the engine, as it helps absorb pressure and keep oil from leaking out. This seal is made of high-grade plastic and rubber, ensuring a snug fit and superior durability.

Valve stem oil seals are typically made from rubber or other synthetic materials and are designed to prevent the oil from leaking out of the valve guide. They are used in all types of engines, including gasoline, diesel and turbo charged. The seals are designed to fit snugly around the valve stems, while still allowing the valve to move freely. Their main purpose is to stop oil seeping out, thus preventing it from entering the combustion chamber and causing engine failure.

The most common type of valve stem oil seal is the O-ring. These are composed of a circular section of rubber, which is installed into the cylinder head around the valve stem. When the engine is running, the pressure inside the cylinder pushes against the rubber O-ring, creating a seal that prevents oil leakage. O-rings are generally quite durable and can last for many thousands of miles, although they should be replaced regularly in order to ensure a reliable seal.

Product Identifiers

Valve stem oil seal:

Valve stem oil seals should also be replaced when an engine is overhauled, as the old seal may be too worn or damaged to work effectively. Replacing a worn oil seal will also help to reduce wear caused by friction and ensure that oils flow freely through the system. A new valve stem oil seal will provide a tight-fitting seal and help to keep oil in the engine where it belongs.

Valve stem oil seals are vital for maintaining the performance of a vehicle's engine. They are a key part of the internal combustion process, ensuring that the engine is working properly and without issues. Without the use of valve stem oil seals, the engine can overheat and become damaged, resulting in costly repairs and replacements. For this reason, they should be replaced on a regular basis in order to keep the engine running smoothly.

Valve stem seals are made from a variety of materials, including nylon, PTFE rubber, steel, and synthetic rubber. Sometimes these materials are combined into a single sophisticated design. When synthetic rubber is used, there are three basic types: nitrile, polyacrylate, and Viton.

Nok-Cn factory provides you with high quality products.

NNK Valve Stem Seal Service Introduction

Located in China since 1983, NNK SEALING PARTS CO., LTD. is a Valve Stem Seal supplier and manufacturer with more than 40 years of experence in the Seal Industry.

With more than 40 years experience, NNK is specialized in leading seal and oil seal manufacture. From oil seals, O-rings, to gaskets, and customized products, application industries include manufacturing, chemical processing, defense, water treatment and filtration, hydraulics, fluid power, heavy trucks, automobiles, aerospace, oil and gas, medical and For life sciences, food and beverages, a complete product line is available for customer needs and specifications.

Valve stem seals are made from a variety of materials, including nylon, PTFE rubber, steel, and synthetic rubber. Sometimes these materials are combined into a single sophisticated design.

Types of Valve Stem Oil Seals

There are two main types of valve stem oil seals: positive and non-positive. The positive type has two lips, one for the cylinder head side and the other for the valve stem side. They are predominantly used in older engines and have proven to be reliable in many applications. The non-positive type, however, has a single lip that seals against either the cylinder head or the valve stem side. This type is more commonly used and is the preferred option in modern engines due to its increased sealability and durability.

NNK valve stem seal Features:

Optional beaded lip design feature to provide lowest friction and power loss
Development to specific customer requirements
Consistent oil metering
Excellent resistance to oils/fuels and high temperatures
Benefits

Long term emissions control 
Long service life
Optimum valve lubrication 
Minimum valve guide wear for maximum valve train life

The most important function
Oil metering to the valve guide / stem interface is the primary function of a valve stem seal, contributing significantly to an efficient and
durable valve train of a combustion engine.
The requirements for each engine differ according to their design
parameters and operating conditions. 

NNK can offer a range of standard valve stem seals, which provide the correct oil metering rate for many applications. This is true for diesel and gasoline applications as well as for intake and exhaust valves.
There are however, applications where the oil metering rate must be adjusted. The oil metering rate can be tuned to the exact requirements of a specific engine by changing defined design parameters of the sealing lip.
A sophisticated adjustment of seal lip design and contact load allows not only for modification of the average oil metering rate of a valve stem seal, but also for targeted tuning to support lubrication in defined engine application or load conditions.

The Materials and durability performance of the valve stem seal
Our valve stem seals are designed and validated to meet even extended durability targets of the engine. Dedicated FKM rubber material with widely proven performance is being used for standard applications, special material for the most aggressive oils and combustion residues is also available. 

NNK valve stem seal design:
Positive seals : Attach to the valve guide boss. They work like a squeegee, wiping and metering oil on the stem as it passes through the seal.
Deflector seals: Deflect oil away from the valve stem. Also called umbrella seals, they move with the valve stem to shield the valve guide from excess oil.
Stem Seal Materials: Nylon, Teflon, Steel, and Synthetic Rubber (NBR, Polyacrylate, and Viton).
Apply to:
DAIHATSU，ISUZU，MAZDA，MITSUBISHI，NISSAN，TOYOTA ，SUZUKI，KOMATSU，DAEWOO，HYUNDAL，BMW

NNK and valve stem seals：
In order to prevent premature hardening and rupture due to insufficient heat resistance of rubber seals, NNK guarantees the service life and ensures that the engine is in a lubricated state. The materials we choose are based on the use environment of the seals and the characteristics of the materials themselves. The oil seals produced have high-quality properties such as high temperature resistance, wear resistance, and long service life. Currently, Viton has excellent heat resistance (up to 450° F) and abrasion resistance and is the material of choice for most valve stem seals. If you need replacement, buy new valve seals，please contact us.

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FAQ

1.Why more and more customers choose us?
a. We are specialized in the manufacturing and exporting of high quality seals. Choose us is to choose the rest assured.
b.We mainly produces various types, specifications, models of the seals of high precision mechanical components. We have all the specifications of what you need to help you achieve one-stop shopping, save time, effort and worry.
c.We has long been a domestic and international numerous oil seal mould supply business of manufacturer, service for 15 years, we have professional talents and product research and development equipment, our research and development ability, is the domestic first-class oil seal manufacturer home.
d. We provide one-stop sealing solutions, and provide a full range of services, from product design, mold development, stamping skeleton, vulcanization molding, clip, screening and packaging,. The entire process would take a shorter, more stable quality.
2. What is your packing?
a. Paper roller: 10pcs in one roller, 200 rollers in one carton
b. PP bag: 50 or 100pcs in one bag,15 or 30 bags in one carton
c. Box: 1pc to a box
d. According to customer's request.
3.Date of Delivery
a. 1-2 days if goods in stock.
b. 10-15 days if goods out of stock with molding.
c. 25-30 days if goods out of stock without molding.
4.Payment Term:
a. 30% T/T in advance and 70% balance paid before shipment.
b. West union/ Money Gram
c. Paypal
d. others for discussion
5. Can you produce according to the samples?
a. We accept ODM and OEM at the same time.We have the ability to provide the sample of the products of decomposition, develop the mould, for production.
6. How do you make our business long-term and good relationship?
a. We will continue to improve the process control, and improve the quality of our products and work to reduce operating costs and provide a competitive price for customers, to ensure that customers benefit
b. We seriously treat every customer, in good faith with them to do business, make friends, no matter how much volume, we will provide