FlexiCase The FlexiCase seal is a metal-cased rotary lip seal suitable for applications where elastomeric lip seals fail and mechanical seals are too costly. 16 Rotary Seal Gland Dimensions (Series KP, KTS, KS, KS13) 17 Rotary Seal Gland Dimensions (Series LKS) 18 Rotary Seal Gland Dimensions (Series S3115, 71, PB) 19 Rotary Seal Gland Dimensions (Series RS3115) 20 Hardware Design Parameters 24 Rotary Seal Installation Options 26 Rotary Seal Application Example 27 Sealing Successes The main functions of a lip seal (also known as a radial or rotary seal, which we’ll come to shortly) are to retain lubricants, remove contaminants, confine pressure and separate fluids. By precisely adjusting lip and heel geometries, energizer forces, and material formulations, we’ll create a solution that meets your unique rotary sealing requirements. Dynamic rotary sealing applications for PTFE seals include: DynaLip® seals came around a decade after OmniSeal® rotary lip seals. In this interview, AZoM speaks to Vern Robertson, FEG SEM Product Manager at JOEL USA, about the benefits of using a low kV in SEM imaging. There are many similarities between elastomer rubber lip seals and OmniSeal® PTFE lip seal products, as well as a number of differences. The seal's ability to cope with challenging industrial, automotive, and aerospace applications are one of their key benefits. So what is a lip seal? They offer an excellent alternative to elastomer rubber lip seals if the conditions are challenging and exceed their capabilities. Since the lip is not spring energized, the radial lip … specific application requirements. OmniSeal® lip seals are easy to install, address strict EPA leakage requirements and are also compatible with oil and refrigerants and for use in small spaces for the entire lifespan of the pump. Seals have come a long way; from metal and leather, to the more recent braided packing seals. The term lip seal is generally used to refer to what is correctly known as rotary shaft seals or oil seals or a radial shaft seal. This includes uses in fighter jets, aircraft carriers, and helicopters. PTFE lip seals offer excellent leak control and the ability to run at 1,000 to 6,000 RPM with a huge range of lubricants and over extended periods of time (15,000 hours) so as to reduce warranty claims. Single lip rotary shaft seal. Saint-Gobain Seals are always looking for ways to improve the design and manufacture of their seal products. ... use and installation of rotary shaft lip seals used for retaining fluid or grease in unpressurized equipment, or equipment with a low differential pressure, that has rotating shafts. This new lip seal business focused on high-pressure hydraulic pumps and motors, military alternators, and other commercial products including aftermarket diesel truck crankshafts seals and thermostats. Oil seals are an effective way to protect moving parts. It is incredibly important that the equipment used for these applications does not fail. Monitor seals regularly and when you see visible damage, replace them. Saint-Gobain Seals. (2019, August 05). The lip makes point contact with the shaft that forms two angles, and it is this contact with the rotating shaft that wears and damages the shaft. They are used to propel fluids in pump systems as fire fighters spray foam retardant. The APU was deployed on US Airways Flight 1549 (Miracle on the Hudson), and provided electrical power to help land the plane safely. Discover our rotary shaft seals specification sheets here. Shaft seal in a rotary compressor with oil drainage, type HN 2390. Polymer Concepts has been the leader in providing innovative sealing solutions for high-speed Rotary Lip Seal applications. Saint-Gobain Seals’ lip seals are also making an impact in rescue applications. AZoM, viewed 26 January 2021, https://www.azom.com/article.aspx?ArticleID=18249. Mixers are another area in which seal customization is common in this industry. To request more information regarding oil seals or rotary shaft seals, please fill in the product information request form here. When compared to elastomer lip seals, PTFE lip seals use a far wider lip to shaft contact pattern. Under certain running conditions both kinds of seals can be used however, the latter ones are generally used for applications where a significant pressure difference needs to be preserved. Spring energized rotary PTFE FlexiSeal™ designs. Saint-Gobain Seals’ lip seals are put to work in some of the most challenging applications in crankshafts, distributors, fuel pumps and cam seals, which are used in the racing industry where naturally, engines are frequently pushed to their limits. In most applications, the seal’s main function is to retain the bearing or system lubricant. OmniSeal® PTFE lip seals do not use extension springs for sealing in the majority of cases. Various designs feature the Clipper® oil seal composite rubber/aramid fiber ID with an elastomer lip OD which seals against the rotating bore. Both lip seals and mechanical seals are used in a wide variety of applications that relate to each other, but there are key differences in both their applications and qualities. FKM: 70 Shore A: … This article will take a closer look at the life of the mighty PTFE rotary lip seal and its evolution through the years. Our rotary seals and radial lip seals are designed to seal fluids, gases, oil, grease, oil mist, vacuum or other media on rotating equipment, including rotating or oscillating shafts, rods, tubes or bores. Saint-Gobain Seals. Compatible with most lubricants and able to run in dry or abrasive media. This added Furon to Saint-Gobain’s already robust spring-energized seals business that was founded in 1955. With DynaLip® seals, the need for metal components was eliminated entirely as the whole seal was machined from the same polymer material. The main reason seals are used is to stop fluid from seeping into a separate area, and to keep the rotary shaft lubricated. Many thermal elastohydrodynamic lubrication models of rotary lip seal have been introduced, and most of these models neglect the asperity contact. Upper limits in speed, pressure, and temperature of their products are found through rigorous testing and they continually aim to go beyond the perceived limits of seals. Their seals are also used on equipment that requires FDA-approved materials used in the following machinery: All of these are demanding applications and require very low seal frictional drag to keep temperatures down. AZoM. When compared to PTFE seals, most elastomer rubber lip seals would not survive the chemicals used in these systems. In turbochargers, OmniSeal® lip seals run at high speeds of 4,000 to 36,000 RPM and can cope with extreme temperature ranges from -40 °F to 350 °F (-40 °C to 177 °C), with limited lubrication over an extended seal life. There are extreme conditions in these engines, with every element bending, shaking, and twisting, causing parts to come into contact with each other that usually shouldn’t. To add to this successful event even futher, four of the top five finishers drove cars with this top builder’s engines that benefited from these lip seals too. High temperatures thin the lubricant, causing the rotary shaft seal to dry out and become brittle. An Introduction to PTFE Lip Seals for Rotary Applications. They also use a similar amount of space when in use. Saint-Gobain Seals’ lip seals are also used in geared turbofan jet engines. Traditionally, lip seals have been used to seal low (7-psi to 10-psi) pressures, but newer lip seals designs now can seal 150-psi or greater on rotary equipment. If equal pressure is not applied during installation, the seal will be uneven and will not function properly. AZoM. PTFE lip seals also make use of a lighter unit loading, but a wider footprint. Created in the early 1970s, OmniSeal® rotary lip seals are able to withstand hostile environments with temperature ranges from -53 °C to 232 °C, demanding chemical environments, and dry and abrasive media. In 1995, an elastomer band was added to Saint-Gobain Seals' lip seal outer diameter. The original designs were based on conventional, high pressure lip seals and, over time, as demands increased and better performance was needed, seals were required to have zero leakage and extended seal life. Lip seals compete with mechanical face seals in sealing oil or grease in rotary shaft applications. There are a number of reasons why aerospace manufacturers depend on lip seals such as these. The majority of elastomer rubber lip seals use an extension spring for the loading mechanism for tight sealing. When crankshaft seals in restrictor plate engines were being burned out at high speeds and rapid pressures at a recent race at Daytona Super Speedway, a top NASCAR engine builder turned to Saint-Gobain Seals lip seals. Custom-designed OmniSeal® lip seals provide tighter seals and enhanced performance over their elastomer counterparts. A PTFE Rotary Lip Seal is a seal that features a lip on the ID that seals dynamically on a shaft and metal casing on its OD to press-fit into a bore. These rotary shaft seals perform exceedingly well … Rotary seals with a dust lip, or excluder lip, provide an extra layer of protection against both contaminants and corrosion. Please use one of the following formats to cite this article in your essay, paper or report: Saint-Gobain Seals. It depends on the environment and the amount of wear and tear it experiences. 2019. Some of the Saint-Gobain Seals solutions in this area can run at speeds of over 20,000 feet per minute, which is equivalent to 102 meters per second. After its purchase, the Fluorocarbon Company relocated SealComp to a plant in South Carolina that produced metallic seals for nuclear and petrochemical markets. These particular piston cup seals use unique spin forming technologies to minimize seal friction drag, which extends the time the unit can be used without needing to be recharged. This is achieved by: Providing static sealing between the outer diameter of the seal and its housing. They also require less space than mechanical carbon face seals in turbine shafts and external gearboxes. Discover Automated Material Analysis with the Vanta™ iX In-Line XRF Analyzer. As they can operate at higher pressures and velocities when compared to most elastomer lip seals, they are an excellent alternative. A rotary lip seal usually operates with full-film lubrication. While all of the above examples are just some of the main areas in which PTFE have found applications, they are also relied on in demanding applications in the life sciences, with piston cup seals for oxygen concentrators to improve patients’ breathing and mobility. To simulate this condition, a mixed soft EHL model has been constructed. Other benefits of PTFE lip seals include: Two of Saint-Gobain Seals’ common types of lip seals are OmniSeal® PTFE metal-cased rotary lip seals and DynaLip® polymer seals, both of which are interchangeable. https://www.azom.com/article.aspx?ArticleID=18249. An Introduction to PTFE Lip Seals for Rotary Applications. They are also required to handle high-pressure wash-down and pass IP69K testing. This information has been sourced, reviewed and adapted from materials provided by Saint-Gobain Seals. Lip seals serve to protect lubricated moving parts and they do this by keeping the lubricant inside the bearing, and keeping contamination from dirt or other liquids out. Retrieved on January 26, 2021 from https://www.azom.com/article.aspx?ArticleID=18249. High temperatures are an oil seal’s main challenge. Various ID lip shapes and spring load options available to suit the application. The result was a win-win for everyone as Brad Keselowski and the #2 Penske Ford won the race while using Saint-Gobain Seals’ lip seals. Nitrile rubber sealing element provides high surface speeds and good general chemical resistance. Insufficient oil is another common problem. Over time, Saint-Gobain Seals' focus has moved to applications asking more of PTFE lip seals. Rotary shaft seals work by squeezing and maintaining lubricant in a slim layer between the lip and the shaft. Oil seals are commonly used in sealing rotary elements such as hydraulic pumps and … The right material and type of oil seal is determined by the application and the medium that will be used with the oil seal. Shaft seal in a spindle boring head type HN 2390, friction-optimized. Essentially, PTFE lip seals were designed to bridge the gap between conventional elastomer lip seals and mechanical carbon face seals. Additional sealing at the press-fit area can be obtained by adding a spray on seal coat to the OD of the seal. In the mid-1990s, The Fluorocarbon Company changed its name to Furon, and was acquired by Saint-Gobain Seals in 2001. The hydrodynamic action created by the turning shaft causes a pump action that helps hold the seal. Rotary lip seals are used to replace regular rotary seals in some applications because they are less expensive and smaller. They provide better performance than traditional contact based measurement methods and are integral to metallurgical plants worldwide. Cased lip seals are the most robust design when considering a rotary seal. Saint-Gobain Seals’ lip seals are used in auxiliary power units (APUs), turbine engines, starters, alternators and generators, fuel pumps, Ram Air Turbines (RATs) and flap actuators, which is one of the largest markets for lip seals. The main differences between the two are seen in their construction. Aside from acting as a dam or a barrier, lip seals also act as a pump and are widely used in conjunction with rotary, reciprocating and oscillating shafts. 40 years later, a number of manufacturers began to reassess the entire sealing system and often built sealing surfaces into seal assembly and incorporated multiple lips with vertical and horizontal contact points. In the late 1940s, synthetic rubber began to take the place of leather. So. While you can use a rotary seal with a dust lip in a variety of applications, it truly shines in situations when you must keep water or dirt out yet keep lubricants in. To handle this along with the operating rotational speed, Saint-Gobain Seals offers a patented, floating lip seal design. When you make a purchase, it is important to ask what is the oil seal’s maximum operating temperature to confirm it is suitable for the application. Special integral plastic stiffener ring to provide interference fit in the housing. This relatively new version of the older technology has evolved because of the advancements in sealing element materials. Made with a metal casing, the seal can be manufactured from a variety of materials for PTFE and PTFE-blended sealing elements. For more information on this source, please visit Saint-Gobain Seals. How are OmniSeal® PTFE lip seals, DynaLip® polymer seals and other lip seals from Saint-Gobain Seals making THE difference in our daily lives? In this interview, AZoM talks to Brad Behr and Mark Kemper from Tornado Spectral Systems, about the work they do and how their Raman spectroscopy products are adapted for use in hazardous environments. Metal-cased lip seals were deemed categorically unsuitable for this purpose due to the chance of them coming into contact with rotating shafts mixing explosives. Outside Lip Rotary Shaft Clipper Oil Seals for Stationary Shaft with Rotating Bore (OL) Springless and spring-loaded seals for stationary shaft/rotating bore applications are available from Parker. E-drive and cooling systems in electric vehicles also make use of Saint-Gobain Seals' lip seals. A good example of PTFE’s superior functionality is in industrial air compressors, where they are configured to provide in excess of 40,000 hours of maintenance-free service. Elastomer rubber lip seals mold rubber directly to a metal casing. Shaft seal materials originally evolved from using felt and leather to including elastomer. PTFE materials do not transition into a liquid state or a state that allows the material to flow; as a result, PTFE lip seals are created by machining the sealing members that are then assembled into a metal casing, followed by mechanical clamping. The O-ring provides tight static sealing and anti-rotation. Evolving PTFE Solutions: Rotary Lip Seals Become The Viable Choice. The specific application for PTFE lip seals is found in sealing rotating shafts, in particular those with high speed. Saint-Gobain Seals offer shaft seals ranging from 0.500 inch to 6.000 inch diameters (13 mm to 150 mm) for the screw compression industry. They offer an excellent alternative to elastomer rubber lip seals if the conditions are challenging and exceed their capabilities. Purpose Rotary lip seals contain lubricant inside a … New technologies were developed to more than triple the lifespan of the seals while always maintaining tight leak control. The same can be said for PTFE lip seals. The majority of NASCAR teams and Indianapolis car engines make use of Saint-Gobain Seals lip seals. Rotary lip seals maintain a thin layer of lubricant between the “lip” and the shaft. In 1982, the Fluorocarbon Company bought SealComp, which was at the time a small, family-owned lip seal business based in Michigan. As well as being FDA compliant, seals must be free of cavities that may allow materials being sealed to become trapped, as well as be compatible with acids, bases and cleaners. Your decision should also be informed by a number of other operating conditions, but the conditions noted above are of primary concern. In contrast, PTFE lip seals cannot be molded directly onto metal casings. "An Introduction to PTFE Lip Seals for Rotary Applications". Rotary shaft seals work by squeezing and maintaining lubricant in a slim layer between the lip and the shaft. Around a half-gallon of fuel burnt per mile in a typical airliner, this more efficient engine is expected to save an average of $1.7 million in operating costs per airliner per year. These seals are often more cost-effective due to their simple design. For decades or even centuries, finding effective seals against dynamic surfaces has been a significant challenge that has grown in complexity since the early introduction and advancement of automobiles, airplanes and complex machinery. They are able to run at higher pressures and velocities on rotating shafts when compared to elastomer lip seals, and their advantages don’t stop there. By continuing to browse this site you agree to our use of cookies. PTFE lip seals can offer brilliant sealing capabilities and low friction in dry or abrasive media. Their creation became a necessity when Saint-Gobain Seals began working on a military application for blending and mixing highly explosive materials. They can cope with temperatures from -40 °F to 350 °F (-40 °C to 177 °C), pressures from vacuum to unknown high-pressure spikes, and shaft speeds of 4,000 to 14,000 RPM. Early pioneers used rope, rawhide, or leather straps with fat on wheel axles as some of the first seals or sealing elements. It is the elastomer lip seals that are the most common shaft seal product on the market, which are directly molded to a metal casing that provides the necessary rigidity. Metal-cased seals use sheet metal to form seal casings, where the sealing lips are then assembled for the seal to be mechanically clamped. What is an oil seal’s normal life span? Through a co-engineering approach, Saint-Gobain Seals engage with their customers’ engineers from the very beginning of a project to develop and meet specific requirements, from optimal sealing jacket material formulations, sealing jacket design configurations, to optimal spring energizer configurations, to arrive at the best result. It is a job that demands precision. Rotary shaft seals provide protection through two crucial functions. The best practice is to be proactive and replace seals before they go. Due to this, Saint-Gobain Seals PTFE lip seals are considered the industry standard with the ability to offer over 40,000 hours of maintenance-free service. More info. Rotary Lip Seals. Saint-Gobain Seals. Many of the elastomeric seal companies of today once operated as tanneries. "An Introduction to PTFE Lip Seals for Rotary Applications". Do you have a review, update or anything you would like to add to this article? The Fluorocarbon Company was one such manufacturer. With great power comes great responsibility. In their construction, both seals are very similar in that they use metal casing for structure, a press fit into a stationary housing gland, and a wear lip material to rub on the rotating shaft. Abbey Seals International Ltd is Ireland's leading manufacturer and distributor of seals and gaskets, The term lip seal might conjure up images of an amazing way to deal with people who talk too much, but the real function of this seal is a bit more mundane. Our OmniSeal® rotary lip seals were introduced in the early 1970s designed to bridge the gap between conventional elastomer lip seals and mechanical face seals. A gasket is sandwiched between layers of sealing lips and the ... • The successful application of PTFE radial lip seals is dependent upon a thorough understanding of the Keeping extra rotary shaft seals on hand and proactively replacing them before they are worn out can prevent damage to machinery and interruptions to productivity. Diaphragm rotary shaft seal including single lip seal with steel backing ring and support/dust lip for low friction and low wear. First, check the new oil seal thoroughly to ensure it is free of damage, paying extra attention to the elastomer and the case. Today, Saint-Gobain Seals' rotary lip seals on the main turbine shaft of turbine engines are easily able to run at speeds and temperatures nobody thought was possible just a few years ago. Important factors including shaft speed, surface velocity, operating temperatures, the media being sealed, and system pressures should all be carefully considered when selecting your precise fit sealing solution for a rotary application. Instead, these seals respond on any loads applied to the stretching of the sealing lip and bend radius produced by the metal casings. The specific application for PTFE lip seals is found in sealing rotating shafts, in particular those with high speed. Sealing is aided by the hydrodynamic action caused by the rotating shaft, which creates a slight pump action. Additional features were later added for seal removal and positive stops to position the seal and stop incorrect installation. Saint-Gobain Seals' lip seals are used on the drive shaft of the blowers. Saint-Gobain Seals began working with most major air compressor companies in the mid-1980s, where they replaced rubber lip and carbon face seals that were prone to leaking. (accessed January 26, 2021). This was done to eliminate the metal-to-metal press fit and to ensure tight sealing between the seal and the customer’s housing gland. Our 500 Series Advanced PTFE Rotary Lip Seal was developed to significantly improve the performance of elastomeric lip seals with high surface speeds, extreme temperatures, high operating pressure, and caustic environments. In most cases, an elastomer O-ring is used between the seal outer diameter and the mating housing bore. During the late 1920s, the first radial lip seal was created from leather and a metal fastener case. Having the right seal installation tool such as a seal digger is critical for this. Case Study: Dual Lip Crimped Case Seal in High-Speed Rotary Vacuum Application. In the late 1940s, synthetic rubber started to replace leather. Laser Surface Velocimeters are optical speed and length sensors. One of the most frequently used types of seal is the rotary lip seal, generally used for sealing lubricating oil or grease in rotary shaft applications. FlexiLip Application FlexiLip Components Excluder Lip PTFE Body Rubber O-Ring Primary Lip The Parker FlexiLip is a rotary lip seal that features an ID lip that seals dynamically on a shaft and an elastomeric O-ring on its OD to seal statically in a bore. Their performance is not adversely affected in hostile environments with extreme temperatures, aggressive media, high surface speeds, high pressure, or lack of lubrication. A flange or a static O-ring on the OD keeps the seal fixed in the bore as the shaft rotates. They can cope with temperatures ranging from -65 °F to 350 °F (-53 °C to 177 °C) and pressures up to 25 PSI (0 to 1.7 BAR) with a typical surface velocity of 2,000 to 4,000 ft. per minute (10 to 20 m/s). With the RGA series, you can examine components present in a vessel. Metal-to-metal press-fit ensures that the seal is located solidly in the hardware and provides a tight seal. They keep lubricant in place and ensure that other liquids and debris does not get in. Their design has taken this direction to address the wear rate, and these changes were made to lower the unit loading, which is also known as PV. , causing the rotary shaft seals provide tighter seals and mechanical seals the. Extension springs for sealing in the bore as the shaft rotates solidly in late! Are challenging and exceed their capabilities to position the seal are always looking for ways to the... Its evolution through the years composite rubber/aramid fiber ID with an elastomer lip seals were to. 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