The main elements of the hydraulic range are rod seals, piston seals, wipers. The first name in -Rings since 1958 with the right attitude, the best service, and value. The immense clearance in between the machine’s piston and cylinder wall can be isolated and cover up with this seals. An important characteristic of -rings is the compression set, or measure signifying how much an elastomer regains its initial thickness after being compressed. We offer a wide range of hydraulic seals suitable for different cylinder types and industries. Figure 1 Hydraulic seals used between nonmoving fittings and bosses are normally called gaskets. They have a quad-ring loader that makes the seal a good choice for low-pressure rod applications. Of course, not every machine contains both rods and pistons, so be sure you know the difference between the two, and which one is the type of seal that you need. Cylinder repair shops can easily upgrade stock OEM seals with highly engineered System Seals products for greater reliability and performance. Some of the rubber materials used to create seals are nitrile, silicone, natural rubber, butyl and styrene butadiene. We are offering our client an excellent quality range of Hydraulic Seal. Seals prevent or reduce fluid passage between 2 surfaces. The most common profiles and designs per seal type and guides are: piston seals, rod and buffer seals, wiper seals, guide rings and guide strips, -rings and back-up rings. Rod seals and piston seals prevent leakage of fluid from cylinders and stop pressure buildup. Heavy-duty rod seals for mobile and heavy duty industrial equipment. Hydraulic Seals are generally made out of a variety of materials, including Rubber, PTFE , and Polyurethane (AU) Compatibility of the materials is decided upon the particular operating medium or restraints due to pressure, fluid type, temperature or chemical compatibility. Primary rod seal when used in sealing system in combination with BT U-cup. Rod Seals, which guard against external leakage, are one of the most vital components of the sealing system. Aircraft hydraulic components and systems require custom seal engineering to achieve minimal leakage and maximum performance to insure long seal life, and optimize safety concerns. Depending on the application and the type of seal you’re using, preventative maintenance measures may be one the most critical aspects of maintaining optimized performance. Usually made of some type of soft, flexible elastomer that provides exceptional water and air sealing capabilities, hydraulic seals are ring-shaped and primarily designed to eliminate or limit the leakage of fluid moving within a hydraulic or pneumatic system. Ic seals, polypack seals, wiper seals, guide ring, -ring seals, Teflon piston seals. Used as static, dynamic, radial or face seals. Back-up Rings are used in conjunction with -Rings for both static and dynamic sealing applications. Typical seal element materials are: Nitrile and FKM. As the rod rotates back and forth, they avert the leakage of the liquid from inside of a hydraulic cylinder to the outside (dynamic stress sealing). Our rod wipers are easy to install by simply snapping or pressing in, and come in a wide range of materials and styles. Our Hydraulic Seals products range includes -Rings and a number of innovative Seals designed for applications in hydraulic cylinders, such as the spring-energized Turcon® Variseal®, -Ring engergized Turcon® Stepseal®2K, Zurcon® polyurethane U-Cup RU9 and many more. For production workflows to run without a hitch it is vital for the power-transmitting, hydraulic fluid to remain enclosed within the system. Although hydraulic seals are primarily designed to prevent fluid leakage, it must be remembered that hydraulic seals provide other important functions and can only be properly maintained under the right conditions. We also design many seals with secondary lips to capture remnants that may have escaped the sealing. X rings can be used both as static seals and as dynamic seals. Custom manufacturer of seals for hydraulic industry. Just as rod seals are designed to keep ﬂuid in, wipers keep contamination out. Back-up Rings: These seals are designed to solve the problem of seal extrusion. Fold Flat Dust Mask FFP3 made in China
Some wipers have an additional lip to prevent contaminant ingression. Hydraulic applications are challenging for Seals. Rod seals help prevent hydraulic fluid from leaking from the rod end of a hydraulic cylinder. Under zero and low pressures, the -ring pressurizes the lips of the u-cup causing it to create a seal. Our seals and other cylinder repair parts are built to last far longer than the average seal and are held in high regard by many well-known Fortune 500 companies and OEMs. RUB Rod Seals: Made for sealing piston rods, these Single Acting seals include an additional -ring profile that lubricates and resists abrasions. Seals not currently being used need to be adequately stored, lest they deform, corrode, etc. Rod seals are commonly used static hydraulic seals for hydraulic cylinder sealing. A hydraulic seal is any of a number of soft non-metallic rings used to prevent leakage of fluid in hydraulic and pneumatic machinery. Here’s a secret – it is not necessary to buy replacement seals from the hydraulic cylinder manufacturer. Piston Seals can either be single acting or double acting seals. Wipers also provide static sealing function to the cylinder head versus the atmosphere. Anti-extrusion rings are available in many materials and custom profiles including rectangular, contoured, con-tinuous or split designs. Hydraulic seals are used in hydraulic and pneumatic cylinder pistons. Machined grooves in the cylinder housing allow the rod ring to seal directly against the piston shaft. Single-acting piston seals only have to block the pressure from one side of piston, retaining the pressure which powers the piston to move along the cylinder. Piston Seals are usually used in conjunction with bearings and guide rings. Polyurethane Hydraulic Seals will often outwear other materials by large margins especially in abrasive conditions. Gallagher offers the highest performing urethane and PTFE materials for your hydraulic application. For hydraulic applications and the u-cups for pneumatic applications Symmetrical u-cups and squeeze seals are available in a variety of lip shapes and materials. Piston Seals are mounted on a piston head which moves thru the bore of a hydraulic cylinder. Hydraulic -rings were originally established under Air Force-Navy (AN) specification numbers 6227, 6230, and 6290 for use in fluid at operating temperatures ranging from -65 °F to +160 °F. When new designs raised operating temperatures to a possible +275 °F, more compounds were developed and perfected. ESP offers a wide range of hydraulic and pneumatic; rod , piston , symmetrical , and wiper seal profiles and Parker -rings to meet the broad demands of the fluid power industry. Together with the wiper seals, the rod seals can protect the system from external contaminants. The most typical nitrile rubber seals have hardness ranges of 70, 80 and 90 shore. In these positions, seals keep fluid from leaking past the interface between the rod and head, from leaking to the outside of the cylinder, and from flowing across the piston. They are used to prevent contaminants from entering the cylinder when the extended rod retracts back. Piston Seals:These seals help in preventing the lubricant from flowing across the cylinder head. Hydraulic seals are generally made from elastomers, natural and synthetic polymers, which possess weak molecular attraction and highly elastic properties. As an applications engineer, Tim Girardi is no stranger to hi-tech or complex designs. Leakage through the Rod Seal is one of the most common failures so is of significant importance to make the correct choice of Rod Seal type and design. Hydraulic systems are usually sealed with a complex configuration of high performance seals. Piston and rod seals used in pneumatic and hydraulic applications in industrial cylinders. We offer our clients an extensive variety of Hydraulic Seals that have wide usage in various hydraulic machines. Rod Seals are often the decisive factor in the function of a hydraulic cylinder. We can supply seals for single and double acting cylinders, compact seals and composite piston seals, symmetrical seals, independent wear rings, bonded seals and static seals, such as rings.
Dynamic seals, which are also known as shaft seals, seal gaps between two surfaces that do share relative motion. More details on hydraulic seals types are discussed below. Our quick guide below shows the main types of seals that you would find in a cylinder and describes how they operate. With a negative lip design, dirt and foreign bodies in the hydraulic fluid can be pressed between the seal lip and the cylinder. These seals have virtually no size restrictions and are specially designed to optimize equipment performance. Rod seals are used in hydraulic cylinder systems to prevent fluid from escaping the cylinder. Guide rings are also known as wear rings since they serve dual purposes of centering the piston and piston rod while guiding them through the cylinder and preempting metal-on-metal contact. Parker’s Standard PolyPak® (SPP) is a square cross-section squeeze seal with a symmetrical profile for use in either rod or piston applications. To achieve a similar blockage of fluid without the use of seals is often unfeasible or completely impossible, due to the requisite precision and rapid wear of the relevant components. Not only must the hydraulic seals completely prevent leakage of fluid from the cylinder, but they must also withstand high pressures, extreme temperatures and transverse forces within the cylinder. Made from a wide range of sealing grade elastomers, these extruded and cut static face seals are available from030″ through 2.50″D. Hydraulic Seals Hydraulic seals are an integral component of most hydraulic systems. When purchasing hydraulic seals, there are some important factors to consider, such as the diameter of the housing bore and the inner or outer seal, the dimension of the outer shaft and the axial or radial cross section needed for the application. Rod seals and piston seals are available. They are specially engineered and can be used for Hydraulic Cylinder Seals and Hydraulic Rams. There are a few traits that any good manufacturer of hydraulic seals should have. Special care should be shown in selecting the best Rod Seal for your sealing application. So selecting the right material is an art because most applications are compromises, such as resilience versus stiffness, softness versus hardness, low temperature versus high temperature and performance versus cost. Discoloration of hydraulic seals can also be an indicator of chemical attack. Custom manufacturer of diaphragm seals for hydraulic applications. Scrapers or wipers scrape dirt, foreign particles, chips or moisture from the piston rods as they retract into the cylinder. We are happy to advise you about the possible applications of our product range or send you some information. Our unprecedented products are ideal for a wide range of applications. Hydraulic wear rings guide the piston, keeping it centered, which allows for even wear and pressure distribution on the seals. Seals located inside hydraulic cylinders are necessary to prevent leakage between components within the cylinder, which is as much of a concern as leakage out of the hydraulic system. A type of dynamic hydraulic seal called a rod seal is exposed to movement on its inner diameter along the shaft or rod of a hydraulic cylinder. Dynamic hydraulic seals, also called shaft seals, include rod seals and piston seals, which are hydraulic cylinder seals that keep pressurized liquids contained within the cylinder and contaminants and air from getting inside. Improper installation can cause cuts or dents in the lip of the seal, affecting the hydraulic seal’s efficiency and exposing the hydraulic fluid to contaminants. Hydraulic seals are intended to be used in hydraulic cylinders with reciprocating movements, mainly in industrial applications. ISO 9001:2000 certified distributor of hydraulic seals. Contamination particles in the hydraulic system are a primary reason for the failure or short service life of seals. The standard Molythane shell provides high wear resistance and the -ring energizer functions as a spring to maintain sealing contact under low pressure. Best example: hydraulic seals, which are very important for the operational reliability of units.
This reduction in squeeze means less friction and improved seal life, and because parting lines are between the lobes, away from the sealing surface, problems of leakage associated with -rings is virtually eliminated. WRB Wiper Seals: These Medium Duty scraper seals have a special lip that help prevent moisture and dirt from accumulating on the rod. If the clearance gap between the sealing surface and the groove corners is too large or if the pressure exceeds the deformation limits of the -ring material (compound) , the -ring will extrude into the clearance gap, reducing the effective life of the seal. Manufacturer of standard and custom hydraulic seals. GUARNITEC use very high quality polyurethane compounds and other materials in their production. Many hydraulic seal suppliers have the same exact seals that are used in most hydraulic cylinders and can easily cross reference or match up a replacement. When the wiper seals are not secured or fail, it can cause component failure in a fluid power system that leaves other pieces of the operation open to serious damage. For heavy-duty hydraulic cylinders. You’ve discovered -Rings, Inc. Despite the greatest of care, conventional seals are highly vulnerable to damage of the sensitive sealing faces during installation. 3. Leakage control: The use of hydraulic seals can prevent any leakage, thus reducing any chances of downtime or repair. The specific operations of a hydraulic seal differ slightly depending on where the seal is located with regard to the hydraulic cylinder. Hydraulic seals should be a fairly high priority for checkups by your maintenance team. T-seals are composed of a sealing element with two split back-up rings. Industries hydraulic seals serve include aerospace manufacturing, agriculture, automotive manufacturing, chemical processing, defense contracting, food processing, marine products manufacturing, medical and pharmaceutical products development, nuclear power, pulp and paper, and waste disposal. Rods seals, piston seals, wipers, guiding rings and statics seals on stock. Rod Seals: These hydraulic seals are used to prevent fluid leakage within cylinder. Static seals that installed directly into the housing or glands of a system, rod seals are designed to provide dynamic sealing pressure while the piston rod is in dynamic motion. The external lip scrapes foreign matter from the rod, and the other lips act as an effective pressure seal in low pressure applications. Furthermore, purchasers of hydraulic seals should take note of vacuum rating, working temperatures, chemical compatibility (between the seal and the hydraulic fluid), highest and lowest working speed, and minimum and maximum pressure. Because System Seals specializes in custom designs and sizes, the company is a perfect fit for the cylinder repair industry, and it continues to save its customers millions of dollars each year. Asymmetrical seals are so designed that in the installed state they contact the static surface with an initial stress over the whole axial width in order to achieve a sufficiently firm seating in the groove. Wipers are designed to prevent any contamination to the system by external media during stroke movement of the cylinder. We will work with you to ensure our rod seal designs meet your application requirements. U-ring packings (AN6226) and U-cup packings are used in brake assemblies and brake master cylinders. FKM – When applications that require better chemical resistance and higher temperatures up to 400°F (FKM seal elements) with two PTFE or PEEK back-ups are recommended. Hydraulic rod seals are installed in a groove that has been machined in the cylinder housing to provide a tight seal against the piston shaft. These anti-extrusion rings are available in various extrusion-resistant materials and are located on the back-side or low pressure side of the sealing element they are supporting. Sealing Devices has experience with custom aerospace seals, and offers many items including geltek silicone sealant strips from stock. In addition to keeping fluid from leaking, seals also help keep dirt and contaminants out of the cylinder, which extends the lifespan of the cylinder.
Hydraulic seals are crucial in machinery equipment. SSP Seals’ stocks a wide range of hydraulic and pneumatic seals to meet the various needs of industrial applications in terms of design, manufacturing, and application performance. These seals create a tight fit by allowing the passage of reciprocating ramrod through the inner bore of the seal. Bill of Material – A list of all materials needed to manufacture a certain product. For use as an anti-extrusion device in dynamic -ring applications where there is high pressure or excessive gland clearance. Typically called out as “cast” urethane -rings, these parts perform well in quick disconnects, high pressure hydraulic and water applications and in nail or riveting equipment. Wipers work in conjunction with rod seals to protect a system and keeping it free from dirt, mud, water, and other contaminants. This seal design is offered as a rod or piston seal and provides outstanding performance in both hydraulic and pneumatic applications. Snap-in wiper designed to scrape outside contaminants off cylinder rods in medium to heavy-duty hydraulic cylinders. Chesterton” 9K anti-extrusion rings, often referred to as back-up rings, are designed to prevent seals or -rings from extruding into equipment clearances while under pres- sure. To do so would require a combination highly precise machining, unusual materials, low stress on components, and specific fluids—and even then, such a system would fail relatively quickly. Dynamic Seals – Dynamic seals are used when axial or radial movement is required under pressure. These -rings are now standard for systems where the operating temperatures may vary from -65 °F to +275 °F. Contact GBSA today to discuss hydraulic wipers specific to your application. Loaded Lip Seals are very versatile and can be used as rod seals or piston seals. We enjoy the challenge of providing solutions to the most difficult seal applications. Than the inner lip in order to be used for piston applications. KAF’s unique polymer material features high wear resistance and elasticity, thus preventing the damage that commonly occurs during installation. In hydraulic applications, each of the pneumatic seals plays a critical role in keeping the system running efficiently. Lip Seals are for use in rotary applications up to 150 psi in corrosive and abrasive environments. Adjustable packing used in telescoping cylinders and many types of older hydraulic equipment. Within the aerospace industry, custom seals such as silicone sealant strips serve to seal various hydraulic components within aircraft systems. Back-up rings are not seals themselves. Double-acting piston seals are able to concentrate pressure on both sides of a piston, thus driving the ram that the piston is typically attached to. In contrast to the dynamic types of piston seals just described, static piston seals seal the gap between the piston and the piston rod (rather than the piston and the cylinder bore). The hydraulic environment is very extremely tough on seals which must withstand enormous amounts of pressure as well as extreme temperatures and often unbalanced forces and extreme forces inside a cylinder. Various types of seals are used in applications that have constantly moving equipment, such as the rotating or reciprocating shafts and cylinders that are an essential part of hydraulic and pneumatic systems. One basic hydraulic cylinder system may make use of hydraulic cylinder seals , lip seals , hydraulic piston seals, wear rings, scrapers, and more to function effectively. If you have plans for upgrades or expansion of operations in the future, this may impact the best solution for hydraulic seals today. Parker offers a complete range of both activated and non-activated PTFE piston seals and rings for hydraulic and pneumatic applications. Piston seals may also be known as Piston Packing. ISO 9001:2015 manufacturer & designer of mechanical seals, hydraulic seals & pneumatic seals. The seal is designed with initial radial interference to effect low pressure sealing. Piston seals are used to prevent pressurized fluid from leaking across the cylinder head while system pressure pushes the piston down the cylinder bore.