Customization

Why do we need customized seal

The characteristics and advantages of customized seals lie in their ability to design and manufacture products and their performance according to specific usage environments and requirements. They are usually made of materials such as rubber, plastic, or metal, and have high customization and adaptability to meet specific working conditions. Through customization, it can be ensured that the seal achieves the best sealing effect during use, and can still operate normally under complex working conditions, reducing the risk of leakage and damage. Simultaneously extending the service life of the equipment and reducing maintenance costs.

What customized services can we provide

● Product style, size, shape and tolerance

Our equipments and processes keep up with the development of the trend, while keeping the traditional production, we keep introducing and trying new equipments and production processes in order to meet the various needs of our customers for different seals.

Depending on the product, the smallest we can do is 0.4mm or even smaller, and the largest we can produce several meters. We are equipped with a variety of production equipment and processes to meet the needs of different sizes, shapes, and materials. At the same time, we can control relatively small tolerances with the help of a variety of advanced production and inspection equipment to match our customers' precision products.

● Material

Choosing materials requires consideration of multiple factors, including application environment, working conditions, material properties, and cost factors. ‌ Not the most expensive is the best, the most suitable is the best. Common material categories include.

VITON/FKM/FPM: Our main product. It has better high temperature resistance than silicone rubber, excellent weather resistance, ozone resistance, and chemical resistance, and is resistant to most oils and solvents (except ketones and fats). Cold resistance is poor. The general temperature range for use is -20~250 ℃. The subcategories include Type A, Type B, Type F, peroxide fluorine glue, low-temperature FKM, FEPM, ETP, perfluor rubber/FFKM, etc.
NBR: Has good resistance to oil, water, solvents, and high-pressure oil. It is currently a widely used and low-cost rubber seal. The general temperature range for use is -40~120 ℃.
HNBR: It has better wear resistance, corrosion resistance, tear resistance, and compression deformation resistance than nitrile, and has good resistance to ozone, sunlight, and weather. The general temperature range for use is -40~150 ℃.
SILONE: It has excellent heat resistance, cold resistance, ozone resistance, atmospheric aging resistance, and insulation properties. The general temperature range for use is -55~250 ℃.
FLUROSILICONE: It has the advantages of fluorine and silicon, and is resistant to oil, solvents, fuel oil, and high and low temperatures. It is used for special purposes, such as resisting the corrosion of chemicals that require resistance to oxygen, aromatic hydrogen containing solvents, and chlorine containing solvents. The general operating temperature range is -50~200 ℃.
EPDM: Has good weather resistance and ozone resistance, excellent water resistance and chemical resistance, can use alcohols and ketones, is resistant to high temperature steam, and has good impermeability to gases. High corrosion resistance, high insulation, and alkali resistance. The general temperature range for use is -55~150 ℃.
CR: It has excellent resistance to sunlight and weather. The general temperature range for use is -55~120 ℃.
ACM: resistant to petrochemical oil, high temperature, excellent weather resistance, good oxidation resistance, resistance to bending and deformation, and excellent resistance to oil products. The general temperature range for use is -25~170 ℃
POLYURE: Good mechanical properties, high hardness, high elasticity, high wear resistance, high pressure resistance, aging resistance, ozone resistance, and oil resistance. General operating temperature range: -45~90 ℃
Other materials, PTFE, PFA, FEP, fabric inforce, metal bonding, surface coating…

In addition to the types of materials, we also support customizing the properties of the materials themselves. By combining the same raw material with different proportions of auxiliary materials, different performance rubber compounds can be obtained. Not only physical properties, but also some chemical properties can be improved, such as high and low temperature resistance.

Material
Level
Request

NBR

HNBR

XNBR

EPDM

VMQ

FKM

AFLAS

FVMQ

FFKM

PTFE

ECO

SBR

IIR

ACR

Ozone Resistance

△

◎

〇

◎

◎〇

◎

〇

◎

Weather Resistance

〇

◎

〇

◎

〇

△

◎

Heat Resistance

120℃

150℃

220℃

120℃

200℃

175℃

320℃

280℃

90℃

135℃

90℃

110℃

120℃

150℃

Chemical Resistance

〇△

〇

◎

◎〇

〇△

◎

〇

△

〇

Oil Resistance

◎

〇△

◎

◎〇

◎

〇

◎

Water Tightness

〇

◎

〇

◎

△

◎

〇

◎

〇

◎

Freeze Resistance

-40℃

-35℃

-50℃

-70℃

-40℃

-20℃

-30℃

-60℃

-20℃

-100℃

-40℃

-35℃

-60℃

-40℃

-50℃

-25℃

Wear Resistance

〇

◎〇

〇

◎〇

◎

◎〇

〇

△

Deformation Resistance

◎〇

〇

△

◎〇

◎

△

〇

◎

〇

◎〇

〇

△

Acid Resistance

△

〇

◎〇

△

〇△

◎

〇△

〇

△×

Alkali Resistance

〇

◎

〇

◎

△

◎〇

◎

△

◎

〇

△

◎

Tensile strength

◎〇

◎

◎〇

〇

◎〇

△×

◎

◎〇

◎

〇

△

Steam Resistance

〇△

◎〇

〇△

△

〇△

◎

〇△

◎

〇

〇△

Flame Resistance

△

△×

〇

◎

〇

△×

◎

△

△×

Storage Stability

5-10Y

ABT20Y

5-10Y

ABT20Y

5-10Y

3-5Y

5-10Y

ABT20Y

Note：◎Perfect; 〇 Good ; △Not Bad ; ×Bad

How to customize a suitable seal

Product selection is influenced by the size of the groove, the shape of the groove, the way it is used, and the cost. For example, the same simple ring-shaped rectangular groove, static sealing, we will probably recommend O-ring. But if replaced by a dynamic seal, we may recommend star ring, U-ring or other.

Rubber seals, unlike the hard materials such as PTFE, simply fill the grooves on the line. As an elastomer, there is a range of proportions between its dimensions and the grooves, and overfilling or underfilling will not achieve a good seal. We need to narrow it down until we confirm a value. If you need, we can provide you with some help in this regard.

The choice of material is also not the more expensive the better. The performance of each material varies greatly, and most are not as good as others. If you want us to help you determine what material to use, please give us as much detail as possible about the conditions, how it will be used, life expectancy, cost estimate, etc., and we will recommend the most cost-effective material for you.

Why choose SJK

The three main reasons for choosing us are professional advantages, service quality, and reputation guarantee.

Professional advantages

We have a strong technical background and professional knowledge, and our team gathers professionals from the industry. We have many years of experience in the field we are engaged in, keeping up with the latest industry trends and mastering the latest technologies and concepts. The services or products we provide not only meet the daily needs of our customers, but also offer forward-looking solutions to ensure that they can enjoy the convenience brought by cutting-edge technology.

Service quality

We deeply understand the importance of service and always adhere to customer-centric approach, committed to providing high-quality service experience. We have established a comprehensive service system, with a professional team providing services from pre-sales consultation to after-sales support. We pay attention to details, pursue the ultimate service, and ensure that every customer can have a satisfactory service experience. Our goal is to exceed customer expectations, win their trust and loyalty.

Credit guarantee

We value the trust of every customer and adhere to the principle of honest management. The services or products we provide undergo strict quality testing to ensure their reliability and stability. We focus on fulfilling our commitments, and once we promise something to our customers, we will do our best to complete it. This high sense of responsibility and dedication has earned our reputation recognition and praise from a wide range of customers.