The German DIN 3771 standard refers to all O-rings as sealing elements for fluid technology and identifies O-Ring sizes by their Inner Diameter (ID) &Cross Section (C/S). This standard has essentially been incorporated into the international standard ISO 3601 which sets the globally relevant O-ring dimensions and uniform rules for installation spaces and the properties of the O-rings. It defines metric O-rings according to the same dimension chart as DIN 3771 while it has been extended to include O-rings in imperial dimensions. ISO 3601 also goes beyond the German standard in the area of materials containing material requirements for O-rings that far exceed those of DIN 3771.

Elastomer materials suitable for certain sealing situations are referred to by their abbreviation according to DIN ISO 1629 and include: 

Nitrile/Buna-N (NBR), presently the seal industry’s most widely used elastometer, Ethylene-Propylene (EPM/EPDM) used extensively for outdoor, weather-resistant uses and water applications, 

Silicone (MQ, PMQ, VMQ, PVMQ) especially resistant to high, dry heat in primarily static applications, 

Neoprene® (Chloroprene) (CR) developed as oil-resistant substitute for natural rubber with resistance to ammonia and Freon® and therefore a superior sealing material for the refrigeration industry, 

Fluorocarbon compounds (FPM / Viton®) / (Fluorel®) (FKM) combining high-temperature toughness with wide chemical agent compatibility, and 

Fluorosilicone (FVMQ) combining the good high and low temperature stability of silicones with the fuel, oil and solvent resistance of fluorocarbons.

ISO 3601 / DIN 3771 standard O-rings are offered as part of our own (AVIATIONEU NEW ERA) product lines. Sourced from quality manufactuurers they are supplied in competitively priced packs in different materials, sizes, and hardnesses as specified by a two-digit Shore A durometer number,ranging from 20 (soft) to 90 (hard), depending on the type of elastomer.

For additional information please consult the Product Description section or contact us.

CR SEALS power tranmission seals (formerly Chicago Rawhide) are included as an SKF brand  in the company's portfolio for radial and axial shaft sealing solutions in power transmission applications. CR Seals provide superior reliability and performance by retaining lubricants, excluding contaminants, and maintaining seal integrity under pressure. Both radial and axial shaft seals are offered in different series for oil and grease sealing applications. Please refer to Product Description for additional information.

Preformed packings are basically a type of O-ring providing effective sealing over wide ranges of pressure, temperature, and movement, with the advantage of sealing pressure in both directions and reducing friction and wear on moving parts. They are used to prevent leaks and improve aircraft performance. The packings are formed prior to shipping and they are supplied ready to use. Compared to form-in-place gaskets, they offer easy installation without sacrifising performance. Typically made of a slightly flexible material that can be compressed to create a better seal.

The selection of a specific O-ring is based on a variety of factors, including fluid media resistance, temperature range, hardness, durability, gland size, static or dynamic application, etc. 

An extensive selection of preformed packings to choose from can be supplied as part of OEM brands or sourced from quality manufacturers and offered as part of our own (AVIATIONEU NEW ERA) product lines. They are made from different materials such as Nitrile/Buna-N (NBR), Butadiene (Synthetic) Rubber (BR), Flurocarbon (Viton®) rubber  and others. Conform to various Military, Aeronautical & other Standards. They come in different  Metric or Imperial (inch) sizes (internal/outer diameters and thicknesses (cross-sections) , and hardnesses to suit application needs. 

For brief presentations of our offered packings please consult the Product Description Section or contact us for further information.

ROTAX® aircraft engines form part of the product portfolio  of BRP-Powertrain GmbH & Co. KG which develops and manufactures engines for snowmobiles, watercrafts, boats, roadsters, all-terrain and side-by-side vehicles, motorcycles, carts, and aircrafts.

BRP-ROTAX® product range includes certified and non certified internal combustion engines, parts and accessories for light and ultralight aircraft.

Sealing parts such as o-rings, gasket rings, washers and other parts are used in BRP-ROTAX® aircraft engines. They are offered as certified or non certified parts from the manufacturer. Non certified parts can be used in ultralights or other aircraft not requiring certification of parts for their installation. Certified parts are designated by the letters "CERT" in the product reference number (SKU).

Aircraft engine  parts are subject to changes from time to time. Some parts may be no longer available or replaced by others with different part numbers. Listed BRP-ROTAX® engine parts do not imply their current availability or suitability for your engine application. Always consult the most recent Illustrated Part Catalogs (IPCs) or other documentation available from the manufacturer for the correct part number before ordering.

O-rings offer effective sealing over wide ranges of pressure, temperature, and movement, with the advantage of sealing pressure in both directions and reducing friction and wear on moving parts. The selection of a specific O-ring is based on a variety of factors, including fluid media resistance, temperature range, hardness, durability, gland size, static or dynamic application, etc. 

Different MIL SPEC and other o-rings in a wide range of materials, Metric or Imperial (inch) sizes, and hardnesses are offered as part of our own (AVIATIONEU NEW ERA) product lines. Those of MS29513 series are made of Nitrile Rubber, the most commonly used rubber material due to its compatibility with most environments, good mechanical properties compared with other elastomers, high wear resistance as well as its relative cost compared to other rubber materials.The MS29513 o-rings are resistant to aircraft fuels (JP-4, JP-5), petroleum-based products over a temperature range of -40°F to +250°F, hydraulic fluids, most silicone fluids but not resistant to automotive fuels, weathering, sunlight and ozone. A small amount of fuel proof grease applied to these o-rings helps the installation and operation of primers. 

Sourced from quality manufactuurers they are supplied in competitively priced packs in different compounds (most commonly Nitrile 70 durometer (70A) and sizes in inches.

TRELLEBORG o-rings are widely used seals as they are efficient and economical and can be used in a wide variety of static and dynamic applications to seal practically all liquid and gaseous media.They are available in elastomeric and other materials including (among others) EPDM, FKM and NBR, offered in sizes from 10 mm to 250 mm and suitable for use in operating conditions of -40 °C to 200 °C & 25 MPa max pressure. The o-rings are used predominantly for static sealing applications as a radial static seal, e.g. for bushings,covers,pipes,cylinders,rods or as an axial static seal, e.g. for flanges,plates,caps. Their applications include from repairs or maintenance to quality assured sealing applications in aerospace,automotive or general engineering.Compared with other sealing elements,the TRELLEBORG o-rings have a wide range of advantages:

- Simple,one-piece groove design reduces hardware and design costs

- Compact design allows smaller hardware

- Easy, failsafe installation reduces risk

- Applicable to a wide range of sealing problems: static, dynamic, single- or double-acting

- Wide compound choice for compatibility with most fluids

- Ex-stock availability of many sizes worldwide for easy maintenance and repair

Please refer to the attached Aerospace Part Number Guide.

A grease seal, often called an oil or dirt seal, is a type of seal utilized to retain grease in a case or housing. Grease seals close spaces between stationary and moving components in mechanical equipment, helping prevent lubricant escape. Preventing harmful containments from entering machinery is another critical function of a grease seal. Oil and grease seals are available in numerous lip materials. Popular materials include felt, leather, urethane, nitrile, polyacrylate, ethylene-acrylic or polyacrylic, silicone, fluoro-elastomer, tetrafluoro-ethylene propylene and PTFE. Cleveland Grease Seals are intended for use in Cleveland Wheel Assemblies. 

O-rings (also termed as Preformed Packings) offer effective sealing over wide ranges of pressure, temperature, and movement, with the advantage of sealing pressure in both directions and reducing friction and wear on moving parts. The selection of a specific O-ring is based on a variety of factors, including fluid media resistance, temperature range, hardness, durability, gland size, static or dynamic application, etc. The use of O-rings as gaskets or static seals permits metal-to-metal contact and allows almost unlimited pressures under extreme vibration. All O-rings should be lubricated before installation and constant lubrication should be provided for running seals to avoid excessive wear. Sharp edges, threads, and cross-drilled ports over or through which rings must be installed should be avoided.

An extensive selection of O-rings can be supplied as part of OEM brands or sourced from quality manufacturers and offered as part of our own (AVIATIONEU NEW ERA) product lines. They are made from different materials such as Nitrile/Buna-N (NBR), Butadiene (Synthetic) Rubber (BR), Flurocarbon (Viton®) rubber  and others. Conform to various Military, Aeronautical & other Standards. They come in different  Metric or Imperial (inch) sizes (internal/outer diameters and thicknesses (cross-sections) , and hardnesses to suit application needs. 

Those of Military Standard MS28775 are synthetic rubber (Butadiene Rubber (BR))o-rings replacing respective o-rings of AN6227 and AN6230 series. Respective parts of MS28775 are superseded by those of SAE AS28775. Sourced from quality manufactuurers they are supplied in competitively priced packs in different internal/outer diameters and cross-sections (thicknesses) in inches. MS28775 O-rings meet Spec. MIL-P- 5510A and are suitable for MIL-H-560B type hydraulic fluid oil in Type I systems @ -65°F to 275°F. AN6227 standard o-rings (packing) and AN6230 o-rings (gasket)are manufactured to Spec. MIL-P 25732 for use in hydraulic systems using MIL-0-5606 hydraulic oils. For sizing information on MS28775 rubber o-rings and their correlation to AN6227 and AN6230 please consult the sizing table available in the Attachment section.Other offered O-rings are separately listed.For brief presentations of our offered packings please consult the Product Description Section or contact us for further information.

Gaskets & other sealing parts for use on Textron Aviation Cessna, Beechcraft and Hawker aircraft. Also available as FAA-PMA approved parts from other manufacturers.

TRELLEBORG offers a wide range of hydraulic scrapers and wipers in metal, elastomer as well as Turcon® Polytetrafluoroethylene (PTFE) based or Zurcon® polyurethane materials specially engineered for hydraulic cylinder applications with excellent low-friction properties providing exceptional resistance to wear. A hydraulic wiper or scraper prevents contamination of the hydraulic medium that could damage wear rings, seals and other components. They are installed in sealing configurations in hydraulic cylinders to scrape dirt, foreign particles, chips or moisture from the rod of a hydraulic cylinder as it retracts into the hydraulic system.

TRELLEBORG Turcon® and Zurcon® Excluders are Trelleborg proprietary design based double-acting hydraulic scrapers with matching o-rings or without o-rings.TRELLEBORG Turcon® Excluder® 2  double-acting o-ring energized hydraulic scrapers have two functions: a) to scrape contaminants from the retracting piston rod to prevent soiling of the system and b) to hold back the residual oil film on the extending piston rod on the medium side. The o-ring maintains the pressure while the Excluder® 2 performs the scraper function. Excellent sliding properties and stick-slip free. 

TRELLEBORG Turcon® and Zurcon® Excluders are offered in Metric or Inch versions, in different sizes either as sets with matching o-rings or without o-rings. Metric version includes sizes 10 mm to 240 mm. Operating conditions: Temperature: -35 °C to 100 °C,  Speed (max):1 m/s. Appearing prices of Turcon® and Zurcon® Excluders relate to sets of scrapers and o-rings unless otherwise specified. 

Please refer to the description of individual products for additional information and the attached Part Number Guide for Aerospace applications.

Flurocarbon rubber compounds (also known as FPM, FKM, or trade names Viton®, Fluorel®, Technoflon®, Dai-El® ) combine high-temperature toughness with wide chemical agent compatibility,  and feature excellent resistance to petroleum products and solvents and good high-temperature compression set characteristics. The designations FPM, FKM and Viton® very often cause confusion although they all relate to one single base material. FPM is the international abbreviation according to DIN/ISO, FKM is the short form for the fluoroelastomer category according to the American standard ASTM while Viton® is the registered trade mark of DuPont Performance Elastomers.

M83248 series Flurocarbon rubber o-rings feature an extremely high fuel and heat resistance and they ideally suited for aircraft fuel system applications. These o-rings feature a high temperature resistance, excellent resistance to acids, fuels, mineral and vegetable oils and greases, aliphatic, aromatic and chlorinated hydrocarbons, non-flammable hydraulic fluids (HFD) and many organic solvents and chemicals, low swelling in ASTM oil No. 1, and IRM 902 and IRM 903, excellent resistance to aging and ozone as well as low gas permeability and low compression set.

Flurocarbon rubber o-rings are often used in place of those made by Nitrile rubber (NBR) also known as Buna-N, presently the seal industry’s most widely used elastometer. When it comes to selecting Buna (NBR) vs. Flurocarbon (Viton®)  for sealing applications, the selected material should be selected on the basis of the intended application. Viton and Buna are two durable, elastomer materials and they are both commonly used in sealing applications for O-rings and gaskets. 

M83248 series Flurocarbon rubber o-rings are offered as part of our own (AVIATIONEU NEW ERA) product lines. Sourced from quality manufactuurers they are supplied in competitively priced packs in different sizes.

For additional information Flurocarbon amd Nitrile/Buna-N materials please consult the Product Description section or contact us.