PTFE PTEF Radial Shaft Seal Gaskets High Pressure Screw Air Compression Double Lip Oil Seal Auto Parts Hydraulic Pneumatic Mechanical Rotary Seals
Description-PTFE Seals:
PTFE seals
Radial shaft seals with one or more PTFE sealing lip(s) are designed to withstand aggressive environments, high temperatures, high pressures and dry running that traditional radial shaft seals made of elastomeric sealing lip materials cannot withstand. Many of the PTFE compounds are FDA approved.
Main advantages of PTFE seals include:
- High chemical resistance
- Withstand speeds up to 30 m/s (5 900 ft/min)
- Wide operating temperature range, -70 to +250 °C (-95 to +480 °F)
- Withstand pressures up to 3,5 MPa (500 psi)
- Withstand dry running
Assortment
The profiles shown are a selection of the most commonly used SKF seal designs with sealing lips made of PTFE. They can be installed in existing housing grooves where traditional radial seals are used, provided that the grooves are manufactured in accordance with international standards.
The metal case can be made of steel, aluminium or any of the stainless steel materials SS 304, SS 316 and SS 316 TI. The PTFE material should be selected based on the needs of the application.
PTFE seals without a metal case can be designed with an O-ring in the outside diameter groove to provide static sealing ability. Both the PTFE and O-ring material can be selected to meet the demands of different operating conditions, e.g. in the food industry to enable disassembly of the equipment for cleaning.
PTFE materials
The selection of seal materials typically requires a compromise between advantages and disadvantages. There are hundreds of different PTFE materials with a variety of fillers. Common fillers include glass fibre, carbon, graphite, molybdenum disulphide, metal oxides and various polymers. Each possesses different properties, appropriate for different applications and service conditions. Common to all filled PTFE materials are their improved resistance to wear and deformation.
Unfilled PTFE provides, in most cases, a lower coefficient of friction than a filled PTFE material and the lowest degree of wear of the seal counterface. However, a sealing lip made of an unfilled PTFE material has limited resistance to wear and deformation under load.
Selecting the appropriate material for the metal case and the O-ring(s) is also of significant importance to achieving satisfactory sealing performance. Contact SKF for additional information.
Installation
Installation procedure PTFE lips do not have the same elastic properties as rubber lips, which makes them more susceptible to damage.
Therefore, special care must be taken during installation and handling to prevent damage and help ensure proper operation and function. Shaft features such as keyways and splines, as well as drill holes, ports and sharp-edged shaft steps have the potential to damage PTFE lips. Whenever possible, these obstructions can be covered by using thin-walled installation tools made from plastic or metal. PTFE lip orientation during installation will determine the installation method.
Seals with care must be taken during handling and installation see for visualisation: Fig. PTFE seals.
Installation is more difficult when the shaft is installed against the PTFE lip (Fig. PTFE seals: a and c). This type of installation becomes even more complicated when the hardware is difficult to access or visually obstructed and may not be possible if an installation tool cannot be used. In any case, when the shaft is installed against the PTFE lip, SKF recommends the use of an installation cone or "bullet". In lieu of installation cones, longer than normal lead-in chamfers on the shaft would be required. However, shaft features that could damage the seal (keyways, etc.) must still be covered, possibly with tape. If the shaft is installed with the PTFE lip, a smooth, burr-free radius or chamfer on the shaft end is all that is required, provided that no damaging shaft features are present as noted above (Fig. PTFE seals: b and d).
Some seals have two PTFE lips facing opposite directions. In this case, installation is always against one of the lips and an installation cone is recommended.
Size range and availability
The majority of PTFE radial shaft seals from SKF are made to order to meet the demands of each application. There are, however, certain standard sizes within the ranges of approximately 6 to 200 mm (0.250 to 8 in.) shaft diameter and approximately 16 to 230 mm (0.630 to 9 in.) bore diameter. Contact SKF for detailed information regarding designs and sizes.
PTFE SEALS (TEFLON® SEALS)
What are PTFE (TEFLON®) Seals?
PTFE seals-commonly referred to by its brand name, Teflon-are a family of sealing solutions utilizing Teflon and Teflon filled variant materials to meet demanding application requirements. Teflon has almost universal chemical resistance, the lowest coefficient of friction of any known solid material, and wide working temperature range. Considering these properties, Teflon is an excellent choice in material for high-performance seals.
Key Material Properties & PTFE Seal Temperature Range
PTFE has outstanding properties that can withstand aggressive chemicals, high temperatures, and tough operating conditions. Here are some key material properties of PTFE:
|
Material Code |
Description |
Color |
Temperature Range,°F [°C] |
Tensile Strength, PSI [MPa] |
Material Data Sheet |
|
Polycon 01A |
Virgin PTFE |
White |
-450 [-268] |
500 [260] |
4675 [32] |
|
Polycon 01C |
Modified PTFE |
White |
-450 [-268] |
600 [315] |
5100 [35] |
|
Polycon 03B |
Lubricated Carbon-Filled PTFE |
Grey |
-450 [-268] |
600 [315] |
3210 [22] |
|
Polycon 04 |
Lubricated Carbon-Filled PTFE |
Black |
-450 [-268] |
600 [315] |
2310 [16] |
|
Polycon 06 |
Lubricated Glass-Filled PTFE |
Light Grey |
-450 [-268] |
600 [315] |
2525 [17] |
|
Polycon 06A |
Lubricated Glass-Filled mPTFE |
Grey |
-450 [-268] |
600 [315] |
2000 [14] |
|
Polycon 08 |
Formulated UHMWPE |
Gold |
-450 [-268] |
180 [82] |
5850 [40] |
|
Polycon 10 |
Polymer-Filled PTFE |
Tan |
-450 [-268] |
600 [315] |
2925 [20] |
|
Polycon 12 |
Lubricated Formulated PTFE |
Black |
-450 [-268] |
600 [315] |
2400 [17] |
|
Polycon 12D |
Lubricated Formulated PTFE |
Black |
-450 [-268] |
600 [315] |
2680 [18] |
|
Polycon 21 |
Lubricated Glass-Filled PTFE |
Grey |
-450 [-268] |
600 [315] |
3430 [23] |
|
Polycon 24 |
Virgin UHMWPE |
White |
-450 [-268] |
180 [82] |
6600 [46] |
|
Polycon 25 |
Virgin Peek |
Tan |
-346 [-210] |
600 [315] |
15850 [109] |
The rotary shaft is a rotary shaft lip seal. The skeleton acts as a reinforcing steel bar in concrete members and keeps the shape and tension of the oil seal. According to the skeleton type, it can be divided into internal skeleton oil seal, external skeleton oil seal, and internal and external skeleton oil seal. The skeleton oil seal is made of high-quality nitrile rubber and steel plate, with stable quality and long service life. Widely used in automobile, motorcycle crankshaft, camshaft, differential, shock absorber, engine, axle, front and rear wheels, and other parts.
Other material of oil seal: Silicone, NBR, Metal & Stainless Steel, PTFE, etc.
Production equipment: includes vacuum vulcanizing machines, large-scale flat vacuum vulcanizing machines,
rubber machines, CNC machine tools, temperature-controlled ovens, and detectors.
Application High-pressure hydraulic seal auto rubber oil seal:
1. Fluid system (static & dynamic)
2. Hydraulic system (dynamic)
3. Pneumatic system (dynamic)
4. Oil or grease media sealing
5. Water media sealing
6. automobile, motorcycle, industry, agricultural machinery, truck, buses, trailers,
exercise equipment.
DLseals standard sizes of Galvanized Copper Washers metal gaskets Dowty seals Bonded Seals
Our sealing products factory is located in Hangzhou City, zhejiang Province. Founded in 2014, the company is a comprehensive sealing enterprise integrating sealing design, R & D, production, agency, storage and sales. The company has seven companies and three field engineers who have been engaged in the sealing industry for some years. Excellent sealing design and development capability, advanced processing equipment and technology, high-quality imported raw materials (hydraulic reciprocating seal) and skeleton rotary seal; Products are widely used in: hydraulic and pneumatic construction machinery. Petrochemical Machinery and electronics. Electricity. Shipbuilding. papermaking. Coal mine pump valve and other fields
Our main products are: O-ring, X-ring, Y-ring, D-rings, rubber flat washer, ED rings, rubber strips, rubber ball, all kinds of skeleton oil seal, glyd ring and stepseal, polyurethane oilseal, pneumatic seals and Mechanical Seal all kinds of rubber parts for the design according to customer request.
we specialized in the development and production of sealing systems which were used in the Metallurgical,Electrical,Auto, Engineering machinery, Light industrial machinery and Electrical appliance manufacturing industries. BESEALS focus on customers' needs,as a dependable partner and reliable supplier to help you resolve supply or technical problems ,and improve the performance of your equipments or your business. When you are facing emergency repairs situation or urgent orders,the highly responsive team of DLseals will offer you very short lead time. Beseals has a global sales network,and our seals have been sold to more than 100 countries or areas ,Such as America, England, Canada, Australia, Russian Federation ect .
1. who are we? Are you trading company or manufacturer ?
We are manufacturer.We are based in Hangzhou, China, start from 2010,sell to Domestic Market(33.00%),North America(15.00%),South America(10.00%),Western Europe(8.00%),Eastern Europe(6.00%),Souther Europe(6.00%),Southeast Asia(5.00%),Mid East(5.00%),Northern Europe(5.00%),Oceania(2.00%),South Asia(2.00%),Africa(00.00%),Eastern Asia(00.00%),Central America(00.00%). There are total about 51-100 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production; Always final Inspection before shipment;
3.what can you buy from us?
PTFE Seals/Oil Seals/O Rings/Rubber Seals/Plastic Seals/Mechanical Seal/O-RING/ RING Seals.
4. why should you buy from us not from other suppliers?
Beseals is a professional manufacturer of seals .Our company specializes in the production of PU, PTFE, rubber and metal sealing components
5. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
6.Do you provide samples ?
is it free or extra ? Yes, we could offer the sample for free charge but you need to pay the cost of freight.
7. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,Express Delivery;
Accepted Payment Currency:USD,EUR,JPY,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,MoneyGram,PayPal,Western Union,Escrow; Language
Spoken:English,Chinese,Japanese
For more information, please contact us. We look forward to your arrival
Audited Supplier 
){kind=link}
){kind=link}