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Dedicated to strict quality control and attentive customer service, our experienced staff is always available to discuss your requirements and ensure complete customer satisfaction.
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We understand that each customer has unique manufacturing needs. That's why we offer customization options to cater to your specific requirements.
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Our team of experts has extensive knowledge and experience in the industry. We are well-equipped to provide expert advice and guidance to our clients.
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FKM Viton Rubber cord has the characteristics of high temperature resistance, acid and alkali
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The green O-ring is a highly versatile and visually distinctive sealing component used across a
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The silicone sealing ring is a versatile and highly effective sealing solution used in various
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The 2-inch O-ring is a versatile and essential sealing component used in a wide range of industrial
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The Clear Silicone O-Ring is a high-performance sealing solution designed to provide reliable,
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The Fluorosilicone O-Ring is a high-performance sealing solution designed to meet the rigorous
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PTFE encapsulated O-ring combine the chemical resistance of PTFE (Polytetrafluoroethylene) with the
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The Neoprene O-ring is a versatile and essential component designed to provide reliable sealing
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Square Profile O-Rings, also known as square section seals, are advanced sealing solutions designed
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Butyl O-Rings, made from Isobutylene Isoprene Rubber (IIR), represent an exceptional choice for
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Metal Detectable O-Rings are specialized sealing solutions designed to enhance safety and
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Rectangular O-Rings, also known as quad rings, are innovative sealing solutions designed to provide
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What is O Ring?
An o-ring is a circular mechanical gasket used to create a leak-free seal between two components. The o-ring sits in a groove and gets compressed during assembly between two or more parts, creating a reliable seal at the interface. O-rings are commonly used in mechanical designs as they are easy to make, inexpensive, and have simple mounting requirements.
Industrial Uses for O-Rings
Transportation
Buses, trucks, and cars depend on O-rings for sealing the many types of fluids that are part of these systems. The different types of fluids found in automobiles include fuels, refrigerants, and lubricating oil, which have variations in temperature and the speed at which they are used. Braking systems and lubricants for engines and transmissions depend on O-rings as a sealant and preventative for leaks.
Aerospace
O-rings are extremely critical for the construction of aircraft since they protect jet engines from extreme temperature changes and hazardous conditions. Thousands of O-rings are used in commercial aircraft with each one designed to perform a specialized function, which includes adapting to high and low pressure conditions, aggressive lubricants and fluids, and radical temperature changes.
Medical
The United States Pharmacopeia (USP) sets standards for materials used by the health and pharmaceutical industries. The normal use for O-rings is to form a seal for fluids and gases that may have radical temperature and pressure changes. Though these two functions are a part of the medical use of O-rings, an extra layer of requirements are added due to the need for sanitary conditions and cleanliness.
Oil
O-rings in the petroleum, oil, and gas industries are essential parts of the exploration, refining, and transportation of oil products. The main challenge for use of O-rings in the oil industry is the unforgiving conditions under which they must perform since mining and extracting fuel products is commonly done in harsh environments. The specially designed O-rings have to meet all of the normal conditions of temperature and pressure but at much higher standards than is found in other industries.
Electronics
In the electronics industry, O-rings are used for electromagnetic interference (EMI) shielding using elastomers produced to resist a range of ohms from 7 cm to 0.002 cm. These specially designed O-rings are used by telecommunications, the military, and for consumer and industrial electronics. They provide a conductive interface for a wide variety of applications and come in a size to fit any conditions.
Food
Silicone O-rings for the food industry have been approved by the FDA. Much like silicone O-rings for the medical industry, food industry ones have to comply with the same standards that apply to any material that comes in contact with food. The FDA has a “White List” in Code of Federal Regulations – title 21, section 177.2600 that outlines the requirements. The majority of the materials listed are designed for high compression because of the limitation placed on curing materials.
Dentistry
In dentistry, silicone O-rings are used for dental implants, where the O-ring is placed over the ball that secures the dental implant in place. In determining the correct size O-ring for the application, the ball has to be measured to determine what size O-ring will fit over the ball but be secure enough to fit in the groove. Unlike in the past when dental implants were secured with a form of paste or glue, modern implants have a permanently placed ball that holds the implant in place.
Scuba Diving
O-rings are a vital and important part of deep water diving. They provide a seal for underwater cameras, regulators, lights, and tank valves. The main purpose of scuba diving O-rings is their ability to withstand water pressure and prevent leaks. In the case of deep water diving, O-rings are a life saving component that protects the divers air supply and water from leaking into equipment and suits.
Plumbing
There are a wide variety of O-rings made for the plumbing industry that come in different sizes, gauges, and designs. Typical O-rings for plumbing applications are made of NBR and can be found in duct work and pipe fixtures as well as being used as seals around taps and fittings. The main use of O-rings in plumbing is in push fit fittings, the part of a pipe connection that requires a seal to prevent water leakage. It is placed with a low insertion force and allows the fitting to rotate. NBR O-rings are an integral component in piping and water systems.
How O-Rings are Made
Selecting the Mold
The mold for O-rings has two halves. The material is compressed between the two sections. The choice of the O-ring mold depends on the desired diameter. Since the material expands when it is compressed, the groove width should be 1.5 times its diameter. For custom O-rings, new mold tools are computer designed and produced to fit any size that is required. O-ring blanks are cut from steel using a lathe.
Material Selection
Choosing the correct material for the O-rings application is important to ensure its proper performance. The chemical compatibility, temperature resistance, and miscellaneous other factors determine the type of material to be chosen as well as its application.
Extrusion
During the extrusion process, the elastomer is fed into an extruder that heats the material and forces it through a die. The process produces the desired configurations to be placed in the mold in lengths of cord. The die selected for the extrusion process is chosen according to the diameter of the finished O-ring.
Molding
There are three molding processes used in the production of O-rings, which are compression, transfer, and injection.
Spliced and Vulcanized Extrusions
Another process used for the manufacture of extruded cord is spliced vulcanization that does not use a die to create O-rings. Spliced vulcanized O-rings are made from extruded cord that is cut and bonded. They are used for static sealing applications, quick production runs, or when only a few O-rings are needed. They are made from a wide variety of elastomers and come in any size.
Finishing
After the O-rings are molded, they will have excess material around the sides where the molds meet. This material, known as flash, has to be removed for the O-ring to have the proper shape and size. Flash can be removed using three processes to give the O-ring its perfectly round shape.
Curing
Once the O-rings are deflashed, they need to be cured. How long the O-rings are in the curing oven depends on the type of elastomer and can vary from a few hours to a day. The purpose of this step is to stabilize the finished O-rings and drive off any by contaminants from the production process.
O-Ring Design
When examining the basic O-ring, the term design may not seem to fit since an O-ring is a circle made of an elastomer. In actuality, there are several considerations that have to be evaluated when producing an O-ring, which includes its inner diameter (ID) and cross sectional (CS) diameter, hardness of its material, durability, and shape. Each of these factors is used to choose the correct O-ring for the application.
Steps to Designing an O-Ring
Choose a material that has the properties and characteristics for the application.
A key factor in selecting an O-ring is its ability to withstand the conditions it will have to endure. The main concern is the temperature of the application, which can damage the elasticity of the O-ring by increasing its cross link density.
Different O-ring materials are capable of being used with certain liquids and gases since some can withstand the effects of chemicals and oil, while others are not designed for such conditions. During the design phase, it is important to consider, and closely examine, the types of gases or liquids the O-ring may be subjected to.
The hardness of the O-ring has to fit the needs of the application. O-rings vary in hardness from rubber band softness to the hardened wheels of a shopping cart or conveyor.
A major factor in the design of an O-ring is the size of the groove or gland where it will be placed. The determining factor when choosing the proper O-ring is the cross sectional (CS) dimensions of the O-ring, which can be seen in the chart below.
O-Ring Materials
As new applications for O-rings arise, different materials have been adapted to fit the increased need. The types of materials include several varieties of rubber, silicone, and polymers. Materials that are chosen for use as O-rings all have the same basic qualities and characteristics, which is their elasticity and strength since O-rings are normally placed in critical and stressful conditions.
Polytetrafluoroethylene (PTFE) O-Rings
Polytetrafluoroethylene, or PTFE, O-rings are white in color and are valued for being nonreactive to acids, bases, solvents, oils, alkalis, and oxidants. They are able to operate in temperatures from -100° F to 500° F (-73° C to 260° C). PTFE O-rings are tough and abrasive resistant but cannot be easily compressed, resulting in a less secure sealing.
Silicone
Silicone is made from silicon, an element that is taken from quartz. It is produced by combining it with organic groups like methyl, phenyl, or vinyl. The addition of these additional elements determines the properties of the silicone material. Silicone is resistant to the effects of oils, chemicals, heat, ozone, corona, and solvents. It is known to maintain its flexibility at low temperatures. Typical silicone can operate at temperatures between -60° to 225° C with specially designed versions able to withstand temperatures ranging from -100° to 300° C.
Viton
Viton is a synthetic fluoropolymer elastomer rubber used for O-rings in stressful, harsh, and rigorous conditions. They are the main choice for applications that require an O-ring that can endure extreme heat and severe atmospheric conditions where oxygen, mineral oil, various fuels, hydraulic fluids, chemicals, and solvents are present. Viton™ O-rings maintain exceptional performance in extreme temperature conditions.
Nitrile butadiene rubber (NBR)
NBR is known as acrylonitrile butadiene or Buna-N. It is a synthetic rubber copolymer made from butadiene and acrylonitrile. NBR has good mechanical properties and wear resistance, which is influenced by the percentage of the various compounds from which it is produced. The higher the nitrile content, the better is its resistance to the effects of oil and fuels. It is used in applications that have dilute acids, alkalis, and salt solutions present and comes in a wide variety of colors.
Ethylene Propylene (EPDM or EPM)
EPDM is a terpolymer made from ethylene and propylene with a monomer such as diolefin to activate vulcanization. It has resistance to ozone, sunlight, and weathering with good flexibility at low temperatures. EPDM is used for O-rings due to its resistance to dilute acids, alkalis, and certain solvents as well as its electrical insulation properties. It comes in a variety of colors for applications that require sealing phosphate ester based hydraulic fluids and glycol based brake fluids. Some of EPDM's further applications are conditions where there is hot water or steam up to 150° C.
Polyurethane
Polyurethane rubber is a thermoplastic elastomer that is made by reacting a polyol with a diisocyanate or polymeric isocyanate with some form of catalyst. It has high strength and is resistant to tears and abrasions with excellent preventative leakage ability. The many features of polyurethane O-rings include resistance to hydraulic oil, gasoline, hydrocarbons such as propane, grease, water, oxygen, and aging. It is frequently used for hydraulic, cylinder, and valve fittings as well as pneumatic tools and firearms.
Chlorosulfonated polyethylene (CSM)
CSM O-rings are made by treating polyethylene with a mixture of chlorine and sulfur dioxide in the presence of UV radiation. The variation in chlorine content is between 20 and 40% with a small percentage of chlorosulfonyl. The combination of these elements helps in the vulcanization process, which affects the strength of the final product. CSM O-rings are resistant to dilute acids, alcohol, ozone, oxidation, and weathering. They are mainly used for static applications since they have a low compression resistance.
Neoprene (CR)
Neoprene is a homopolymer made of chloroprene. It is one of the earliest of the synthetic rubbers used for sealing. In the production process, neoprene begins as a polychloroprene in powder form. Other materials are added to influence cell size, adhesion, bulk, and color. Once the elements are mixed, they are placed in a heat press and formed into sheets for the extrusion process. There are several uses for neoprene since it is resistant to oxidation and weather. One of its major benefits is its low cost. Neoprene is sulfur cured, which lowers its flammability.
Fluorosilicone (FLS)
Fluorosilicone has the same properties as silicone but contains trifluoropropyl, which increases its resistance to solvents, oil, fuel, acid, and alkaline. It is used as a static seal in aerospace, automotive, and aviation applications. Fluorosilicone has properties that are common for fluorocarbons. Some of its benefits include exceptional flexibility, aging qualities, and UV ray resistance. The use of fluorine in its production provides its resistance to a wide range of chemicals as well as lower surface energy.
Types of O-Rings
Neoprene O Rings
Engineered for durability and resilience, neoprene O-rings are the ultimate choice for dependable sealing solutions across industries. With superior resistance to weathering, oils, and a wide temperature range, these O-rings ensure consistent performance in demanding environments. Ideal for automotive, aerospace, marine, and industrial applications, they offer cost-effective sealing without compromising quality. Trust neoprene O-rings for reliable sealing that withstands the test of time, ensuring your equipment operates smoothly in any condition.
Conductive O Rings
Introducing our Conductive O-Rings – the ultimate solution for reliable sealing and electrical connectivity. Engineered to excel in extreme temperatures and high-pressure environments, our Conductive O-Rings guarantee exceptional performance and steadfast electrical conductivity. Crafted with premium materials and advanced manufacturing techniques, they boast unparalleled durability and resistance to wear and aging. Whether in aerospace, automotive, or electronics industries, our Conductive O-Rings seamlessly adapt to your needs. They not only provide superior sealing but also ensure efficient electrical conduction, promoting stability and safety within your systems. Choose reliability, choose quality, and choose expert support with us to keep your projects operating at their best.
Teflon (PTFE) O-Rings
One of the main uses for Teflon O-rings is in applications with extreme heat where chemicals, solvents, and anti-adhesives are being used. They have exceptional tensile and compressive properties due to their PTFE content, which gives them dielectric properties, a low friction coefficient, and non-toxicity. Teflon O-rings can be used continuously at 250°C (482°F) and have compressive plasticity near zero degrees. The temperature range of Teflon O-rings is -200°C up to 250°C (-328°F up to 482°F).
Clear O-Rings
Clear O-rings, referred to as medical O-rings, are a specialty O-ring used in applications that require a seal that can be visually checked and monitored. They are made of silicone or fluorocarbon that allows for easy detection of contamination, damage, or deformation. The necessity of visual inspection is important in applications involving high precision machines or laboratory equipment. They are an essential part of food production and medical equipment as a means of hygiene.
Flat O-Rings
The traditional and common profile of an O-ring is round. This is not the case with flat O-rings, which have a rectangular or square profile, referred to as torus shapes. They are used in spaces where traditional O-rings do not fit but offer the same tight seal of round O-rings. Flat O-rings are recommended for rotary sealing and hydraulic and pneumatic equipment. They require less pressure to create a seal and can be easily replaced. Flat O-rings last longer, cost less, and have less wear and tear, which eliminates the need for lubrication.
Large O-Rings
The manufacture of large O-rings requires the use of special processes since the typical methods of O-ring production are unable to meet the needs of large O-rings. A common method used to produce large O-rings is thermobonding, referred to as spliced and vulcanized. In the thermobonding process, the joints of the O-ring are sealed with an adhesive and cured, which gives the O-ring exceptional flexibility. Large O-rings are used in the chemical industry, food processing, electronics industry, and pharmaceuticals where they are applied to multiple applications from panel displays to thread tube fittings.
Metal O-Rings
Metal O-rings have minimal springback and are used for high temperature and high pressure applications where there are fluids in exhausts, melt stream plastics, combustion, hydraulics, and valves. They are adaptable to extreme heat, cold, pressure, and vacuums and are used when the needs of an application exceeds the abilities of polymer O-rings.
Metric O-Rings
Metric O-rings serve the same functions as imperial measurement system O-rings but are manufactured using metric measurements for the OD, ID, and cross section profile. They are designed for use in countries that use the metric system for the manufacture of machines and equipment. Most manufacturers offer O-rings in both imperial and metric measurements and are available in the same materials as those produced using the imperial measurement system.
Proper Care of O-Rings
Installation
The first step in O-ring maintenance is at the time of installation. During the installation process, care should be taken to ensure the groove or gland is free of any metallic piece that may cut or pierce the O-ring. The O-ring should be properly placed without twisting or torquing it, which can result in a uniform seal. Proper lubrication and the addition of a tape covering will offer extra protection and extend the usefulness of an O-ring.
Lubrication
The surfaces of O-rings should have a thin coating of lubricant, which will extend their life. The greatest amount of damage to an O-ring to prevent it from supplying an adequate seal is when it dries out.
Cleaning
O-rings need to be regularly cleaned with soap and water. Solvents such as trichloroethylene and carbon tetrachloride can damage an O-ring and are harmful. Soap and water as well as methylated spirits are the least harmful and help keep an O-ring protected. For obvious reasons, any type of sharp tool, even brushes should be avoided when cleaning an O-ring.
Chemical Damage
During the inspection process, an O-ring may show signs of blistering, cracking, or discoloration. This can be caused by exposure to chemicals, which can be avoided by using the correct lubricant and O-ring material.
Replacements
A basic rule for all mechanical components is to have replacements on hand. In the case of O-rings, they have to be carefully stored at room temperature and away from ultraviolet or sun light, which can damage the O-ring‘s outer layer.
Swelling
Swelling can become noticeable when an O-ring becomes less circular and flattened. In this case, the O-ring has taken a permanent set and is not recovering from being compressed leading to a percentage loss in compressive ability. This can be avoided by ensuring that the O-ring does not become over compressed.
Thermal Degradation
Thermal degradation can be avoided with the selection of the correct O-ring material and not placing it in conditions that are beyond its temperature rating. Increased temperatures can deteriorate the elasticity of an O-ring and increase its hardness.
Extrusion
Extrusion is easily noticed. O-rings are placed between two surfaces as a sealant. When the surfaces meet, a portion of the O-ring can get caught in between, which is known as extrusion. If it goes unrepaired, seepage and leaks can occur. It is important to immediately replace the O-ring.
Degradation
Any form of high energy light can damage an O-ring. This occurs due to an interaction between the material in the O-ring and the wavelengths of the light resulting in cracking of the O-ring and leakage.
Abrasions
One of the most common damages to O-ring seal surfaces is abrasion that breaks the seal on applications. The rubbing between the ring and housing heats the O-ring surface, which increases friction and modifies characteristics of the O-ring’s composition. The result of the increase in friction caused by abrasions leads to wear and tear on the O-ring as well as the formation of lacerations on its surface.
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