Hydraulic and pneumatic seals are sealing components used for applications with rotary or reciprocating motions. Hydraulic seal manufacturers create many products that are application specific and specially designed to prevent leaks under very particular circumstances. A hydraulic seal is used to contain fluids and maintain the hydraulic pressure (piston seal, rod seal, back-up ring), to stop the inlet of impurities and to preserve the lubricating film on the rod (wiper seal) and to resist any deformation under a radial load by guiding the piston and rod (wear ring and guide strip). When selecting the best seals for your hydraulic ram, both at OEM or repair stage, it’s important to consider the parameters of the application and the operating conditions. Hydraulic applications can be challenging for seals. Thousands of -ring compounds have been formulated for specific applications. All of the metal materials used to create seals may be plated or galvanized for added oxidation protection and strength. The most common place to find these seals, however, is in a hydraulic cylinder. The piston seals acts as a pressure barrier and prevent fluid from passing the piston. A leading manufacturer of moulded rubber seals, elastomer components and custom engineered solutions; manufactured to the highest quality standards, in medium-to-high volumes, to a diverse range of industries around the globe. Rod seals are used in mobile hydraulic, agricultural, and general industrial applications. Also, these seals protect the rod seals from contaminants. As an application user, you must review the user manual provided along with the purchase of hydraulic seals. Designed for light duty applications where style WD wipers are not required. We offer almost 16,000 hydraulic seals to choose from. Our polyurethane u-cups come in symmetrical and double-lip rod and piston asymmetrical styles that maintain a comprehensive water resistant seal. These flaws are often capable of preventing satisfactory -ring performance under the variable operating pressures of aircraft systems; therefore, -rings should be rejected for flaws that affect their performance. The -ring is considered a universal sealing device. T-seals: These seals can be designed in both rod and piston styles to prevent extrusion and spiraling. Conventional seals swell as they absorb hydraulic fluid. Sometimes called loaded-lip U-cups, B-style polypack, and lip seals, these seals have a beveled edge with a symmetrical cross section. Hydraulic seals are generally relatively soft, non-metallic rings captured in groove or fixed in a combination of rings, forming a seal assembly, to block or separate fluid in reciprocating motion applications. Piston seals are important for controlling the motion of a cylinder. Deep-Z rod seals are a type of symmetrically loaded U-cup seal. To better understand our hydraulic seal capabilities unique to your application, please complete our contact form or send an email to gbsa@ with a drawing of your part. Applications: General purpose sealing, Air Tools, Hydraulic fluids, Petroleum based oils, fuels, L.P. gases, Cold Water, Silicone greases and oils, Di-ester base lubricants (MIL-L-7808), Ethylene glycol base fluids (Hydrolubes) and Hydraulic Fluids and in static and dynamic applications. We supply 100s of styles and 1000s of sizes of hydraulic seals in inch and metric sizes. Wipers: Commonly known as scraper seals, these wipers help the ingress of external contaminants, which can damage the sealing system, as well as the application machinery. The T-shaped design prevents spiral failure that occurs with -rings used in cylinders with long strokes. This grants for equal and even wear, and stress allotment on the seals. Hydraulic seals are produced in most cases like any gother mechanical seal or component made of polymers. Rely on hydraulics or pneumatic seals. Polytetrafluoroethylene (PTFE) -rings: Temperature & Chemical Resistant PTFE is a popular -Ring material which is White in color. Are relatively soft, non-metallic rings captured in a groove or fixed in a combination of rings, to form a seal assembly, to block or separate fluid in reciprocating motion applications. 7. Durability: Hydraulic seals are designed to have long service lives.
Without sealing devices, hydraulic systems would completely fail and cause the machinery they power to become unusable. In addition to our extensive range of stocked products, we offer custom designed sealing solutions and machined seals. A hydraulic seal can achieve far more consistent results, last longer than a precision-machined system without seals, and can easily and inexpensively be replaced should it fail. There are many benefits to choosing Hydraulic Seals over Pneumatic seals. Rod seals are used in hydraulic cylinders for fluid sealing. A wide range of groove configurations and sealing profiles allow Gallagher engineers to match your hydraulic sealing application to the optimal sealing system. And because our seals come in many different materials, dimensions and sizes (ranging from 4 mm to 1000 mm), we make hydraulic cylinder repair easy. WHYPS is a professional website specializing in hydraulic news including products, events, education, careers and fluid power industry. Custom manufacturer of seals including oil, grease, rotary shaft, hydraulic, pneumatic, lip. Bonded seals are used when working with systems that can operate under high pressure. It creates a barrier for dynamic pressure between the piston and the cylinder, preventing fluid from passing the piston and allowing the cylinder to extend and retract. UBE is designed for use as a single acting piston seal. We deliver high quality products every day, including rings, metric seals, pneumatic seals, Teflon seals, and a whole lot more. In addition to normal wear and aging, this seal is directly affected by changes on the rod surface. Nitrile (also known as Buna N) seals are widely used in hydraulic industry because of excellent resistance to oil, a good practical range of working temperatures (-40 degrees C to as high as 135 degrees C), and low cost. We manufacture Hydraulic Cylinder Seals which are developed by quality products obtained by branded vendors. Wiper Seals (also called Scraper Seals) generally are used together with other sealing components. Rod Seals act as a dynamic seal along its inner diameter and static along its outer diameter. In addition to containing hydraulic fluid within the cylinder, rod seals help regulate lubrication fluid for the rod, the wiper seal, and the rod seal itself. Sealing Devices offers many types of seals from -rings that seal water, aircraft fuels and many media on pumps, electronic devices, compressors, transportation vehicles, food processing equipment and medical devices to complex EMI shielding gaskets that block electromagnetic interference in electronic enclosures and devices. Rod Seals are exposed to the motion on their inner diameter along the rod or shaft of a hydraulic cylinder. Dynamic rod seals function in the gap between the piston rod and the cylinder head while static rod seals close gaps between the cylinder head and the cylinder bore. Rod Seals are press-fit into a housing bore with the sealing lip contacting the shaft. There are several other common types of hydraulic seals usually found in hydraulic cylinders. They are also used to help retain fluid pressure in hydraulic systems. Many piston seals are single-acting piston seals, meaning that they concentrate pressure on only one side of a piston. SEALTECH offers you a large choice of seals for any application. Guide rings also known as bearing rings, stop metal-to-metal contact between two dynamic cylinder components. Most seals are made from synthetic materials that are compatible with the hydraulic fluid used. This manual will include essential procedures to properly install hydraulic seals. The symmetric seals are located in the gland with direct contact to the seal lips. UK Seals offer a range of seals especially suited to pneumatic applications. Special high-reliability, machined metal seals for critical sealing service in aircraft engine, aerospace, semiconductor and nuclear applications. They are commonly used to make -rings that are used in applications that involve contact with hydrocarbons or highly corrosive fluids, or when a wide range of temperatures is encountered.
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.
Special tooling for the installation of -rings is available. Seals may also be made from non-elastic materials such as felt and leather. Rod and piston installations use Wear Rings. Custom manufacturer of seals including hydraulic, mechanical, metric, military specification seals. Rod seals prevent rod corrosion and helps for the lubrication of wiper seal and rod seals. A seal may consist of more than one component, such as an -ring and a backup ring, or possibly an -ring and two backup rings. Than the outer lip in order to be used for rod applications. A single hydraulic system will usually make use of several different hydraulic seals, each designed to prevent leakage at a different point of pressure within the system. Rod Seals are the most critical seals in a hydraulic cylinder. Maintaining internal pressure and preventing contamination are leading priorities in terms of properly operating a hydraulic cylinder. They are considered to be multi-purpose hydraulic seals and are designed for significantly improved performance. Light-duty hydraulic and pneumatic U-cups used in pneumatic cylinders for industrial and low-pressure applications. 11. Safe: Hydraulic seals are completely safe to use even in the chemical and pharmaceutical industries. Moreover they are specially developed to accommodate different variables such as cylinder speeds, temperatures, pressures and applications. Also called double-lip U-cups and lip seals, they have nitrile lips and a urethane base to provide good stability and support large loads. Vee Packs: These are seals designed with multiple vee rings. The negative lip forms of normal seals allow dirt and foreign particles to be trapped between the seal lips and the cylinder. Sealing materials designed for life science and medical applications must demonstrate excellent resistance to the aggressive organic and inorganic chemicals and media associated with surgical and laboratorial procedures, including intensive cleaning regimes. We supply Hydraulic & Pneumatic seals for single and double acting cylinders, composite piston seals, compact seals, independent wear rings, bonded seals, static seals ( Rings), and symmetrical seals. Rod seals are key in preventing corrosion. A static hydraulic seal is located in a groove and sees no movement – only sealing within its confined space, acting like a gasket To achieve this the gasket should be under pressure. The material we choose for each hydraulic seal is determined by the operating requirements of each application. Style WK Rod Wipers Double lip design provides the ultimate in wiper action to remove foreign material from the exposed rod while still maintaining an adequate lubricating film. Scrapers & Wipers – Scrapers and wipers are components which prevent the build up of dirt, foreign particles and moisture from the piston rods by scraping or wiping it away. Rod seal kits include a rod assembly, rod wiper seal, U-cup rod seal, and -ring for repairing hydraulic cylinders. A hydraulic seal, at the end of the day, must prevent leakage of fluids from cylinders. Other products offered are mechanical, magnetic, non-contacting, and lip seals. Wear bands or wear rings are used to prevent metal-to-metal contact. Seals are divided into three main classes: packings, gaskets, and wipers. V-ring packings (AN6225) are one-way seals and are always installed with the open end of the V facing the pressure. Sometimes however you can use two single acting seals in a ‘back to back’ arrangement in order to create a double acting seal system. This seal is recommended when the coupling clearance between the head and the rod cannot be reduced and in the event of pressure peaks (500 bar). Hydraulic seals are also subdivided into seals, which have symmetrical or asymmetric cross-sections. Piston seal is a type of hydraulic seal where the sealing lip has contact with the entire housing bore. Quad rings can be used in both static and dynamic sealing applications. Rod Seal failure could result in fluid leakage. Rod Seals are affected by changes to the rod surface and fluid temperatures. Suitable for hydraulic applications that anticipate abrasive contaminations and shock loads.
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 – piston seals 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.