Hydraulic systems are sealed using a combination of specialized components. A detailed understanding of the challenges seals will face in their exact operating environment is essential for an accurate specification, with different elastomer materials offering radically different performance characteristics across a range of parameters. Hydraulic seal installation varies depending on the nature of applications. We have an inventory of military and industrial seals (-rings, back-ups, hydraulic seals, thred-seals, stat-seals and all types of packing seals for hydraulic and pneumatics). Its outstanding tear resistance and abrasive resistance result in its slippery surface properties that make it advantageous for use in seals in moving systems such as mass spectrometer probes and valves. Static Hydraulic Seals are positioned in a housing where there is no motion involved, they are sealing only within their limited space. Fitted into the small housing, the RTA seals are combined with an NBR -ring and PTFE inner to maximize sealing resistance against even the highest pressure. Most often, they’re used to power linear actuators, hydraulic cylinders, and pistons in internal combustion engines. These extreme examples might not be commonplace, but they serve to highlight the importance of using high quality sealing solutions designed for the specific demands of such critical environments and applications. Hydraulic cylinders use water, oil or other pressurized fluids to facilitate the movement of heavy machinery. They also serve to protect the rod seal from any contaminants that do manage to find their way into the cylinder (such as metal chips). Single-acting piston seals for use in older type industrial hydraulic cylinders. This leads to scoring on the cylinder and piston rod (expensive repairs), leaks and environmental problems. Rod Seals are also referred to as shaft seals sometimes. Vulcanizing is an excellent solution for non-standard sized -rings and seals delivering greater strength and tolerances. Designed for medium duty applications and can provide both wiping and sealing action in one component in low pressure systems. For continued skived PTFE film &tape and long seal life, the surface finish of the working surface of either rods or bores should be a maximum of 16 micro-inches. In order to maximise longevity and functionality in specific applications, hydraulic seals are made from a wide range of materials, each with their own unique properties. Hydraulic seals (also referred to as hydraulic cylinder seals or shaft seals) are devices designed to keep fluids from escaping from cylinders or pumps while simultaneously preventing foreign contaminants from entering them. Leather and reinforced materials absorb hydraulic fluid. It’s difficult to pin down specific accessories for use with hydraulic seals, due to the extremely wide range of applications, industries, and types to consider. Piston Seals fit onto shafts with the sealing lip contacting the housing bore. There are two main types of hydraulic seals: static, which seals within a confined space like a gasket , and dynamic, which is exposed to movement on its inner diameter, usually around a shaft of some kind. Usually, hydraulic seals are located on the cylinder head, on the rod shaft, or in the piston. Hydraulic Seal – Allied Metrics Seals & Fasteners, Inc. Polymeric seals make for an easy, inexpensive, replaceable, effective barrier to fluids. Some particular types of hydraulic seals (e.g. bonded seals) are made from metallic materials (including brass, bronze, aluminum, carbon steel, and stainless steel). Therefore, Rod Seals function in conjunction with Wiper Seals to guard a hydraulic configuration against outer contaminants including dust, dirt and outside atmospheric circumstances. Whether it is small or large diameter, low or high pressure, reciprocating or rotary motion, dynamic or static sealing, a suitable product for your application is available. Since 2007 we have been making getting -rings easy by continuing to improve our people, product and process. General-purpose compound suitable for applications requiring resistance to aromatic or halogenated solvents or to high temperature (-20 to 260C with limited service to 315 degrees C). Outstanding resistance to blended aromatic fuels, straight aromatics, halogenated hydrocarbon and other petroleum products.
Fluorocarbon FKM & Viton® -Rings: Chemical resistant Fluorocarbon FKM -Rings exhibit exceptional resistance to chemicals, oils, temperature extremes, low compression set, low gas permeability and excellent aging characteristics. The specific applications of hydraulic seals are as diverse and numerous as they industries they are found in. Hydraulic seals can be found in construction equipment, agricultural machinery, brake devices, clean rooms, conveyors, mixers, presses, valves, and test equipment. Hydraulic seals are most often found in hydraulic cylinders, the mechanical actuators that convert hydraulic pressure (from oil, water, or another pressurized fluid) into unidirectional force for agriculture and forestry vehicles, construction equipment, and similar mechanisms. If the correct elastomer material is not chosen, the seal will break down when it encounters a corrosive fluid and contamination will occur. Gaskets are used in fluid systems around the end caps of actuating cylinders, valves, and other units. Wiper seal for hydraulic cylinder also known as scraper seals is fitted on the head of the cylinder at the external side and provide a sealing contact to the piston rod. The T-seal comes in both piston (TPO) and rod (TRO) styles. DEPAC’s unique polymer material prevents installation damage thanks to its high elasticity and wear-resistance. UTI with asymmetrical profile of the sealing lips and back-up ring as a gap sealing component. The profile has been designed with a shallow groove to ensure tight contact between the static and dynamic part, even in zero pressure situations. Hydraulic seals are divided into two main groupings: static and dynamic. Buffer seals enhance the function of the rod seal by providing a buffer” against excessive internal fluid pressure. Similarly, in the electronic industry, seals such as EMI shielding gaskets serve to prevent unwanted electromagnetic interference in various devices. Rod Seals often see the highest pressure variation. We can also custom-manufacture a full range of seals, in a full range of materials to meet your exact requirements. Advances in more environmentally friendly hydraulic fluid is causing material compatibility issues with traditional cylinder seal materials. Common end use applications are industrial seals, Air Guns, Paintball Markers, pneumatic applications, and other high dynamic applications. Precision and repeatability over months or years of operation should be a factor in deciding what hydraulic seals to select for your project. Wear rings can be found at both the rod and piston locations within a hydraulic cylinder. General applications include cylinders, forming machines, hydraulic presses, and movable cylinders. And, most of the new seals outperform the previous products. Available in plastic, rubber and PTFE delivers the highest performance in a wide variety of rod seal applications. We offer a wide range of hydraulic seals produced by Italian GUARNITEC. New advances in hydrolysis resistant urethanes assist in solving one of the most common hydraulic sealing application problems. Seals play a critical role in the function of hydraulic systems. Guide rings are designed to prevent two dynamic surfaces within a hydraulic system from rubbing together. HydraPak’s cutting edge vulcanizing technology produces high quality seals with large diameter capabilities for your demanding applications. KAF’s computer-designed positive lip wipes foreign bodies away from the seal face. Rod seals are considered the most critical element of a cylinder sealing system. There are many types of hydraulic seals out there and they come in a variety of shapes and sizes. Rod seals specifically work by preventing external fluid leakage from the cylinder. Each ring is individually manufactured and provides excellent performance, as a supporting element, to both piston, rod and face seals that are generally found in static or dynamic applications. The following are the applications of hydraulic seals in various industries. A wiper seal can be installed to prevent seal failure and system breakdown.
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.
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.
Hydraulic seals of different types are governed by various standards and regulations at international, national, and local levels. Piston Seals are typically made of polyurethane but some piston seals can be made of fabric reinforced rubber. Some hydraulic seals are made for very specific applications. Our hydraulic seal product lines will provide you with confidence that your equipment will operate in the most adverse conditions. GBSA offers a wide range of effective hydraulic rod seals including polyurethane -rings. For over 20 years, it has been our dedication to service and outstanding product quality in all our hydraulic seals that have set us apart. These days, manufacturers also provide custom manufactured hydraulic seals to suit specific application needs. Hydraulic seals used internally on a sliding or moving assembly are normally called packings. The sealing direction is important for hydraulic seals and pneumatic seals in mechanisms that use axial movement, such as cylinders and pistons. However, Piston Seals are exposed to the motion on their outer diameter along the bore or tube of a hydraulic cylinder. The creation and development of the hydraulic seal mirrors the lengthy development of the hydraulic system, though modern hydraulic seals only appeared as polymers before they became better understood and utilized. 5. Affordable: Hydraulic seals can be ordered in bulk, and are extremely reasonable in terms of price. However, in both applications, there are common steps to execute to successfully install hydraulic seals. U-cups: These seals are used for low pressure systems. We started small, but now offer an extensive product list of hydraulic seals, rings, and other rubber products. The full range of static seals include -rings, back-up rings, flange seals, bonded washers and OP seals. Bellows seals use a formed or welded bellows to supply a secondary sealing and spring loading. The design helps prevent extrusion up to 5,000 PSI and spiraling (rolling) associated with -rings. Typical applications covered are cylinders, mobile cylinders, hydraulic presses and moulding machines. These allow pressure to build up within the piston, thus allowing the cylinder to extend or retract. Wear Rings absorb transverse loads on the rod and improve the durability of packings in a hydraulic cylinder. To help you identify the best materials to install hydraulic seals, contact Real Seal to create a customized solution and value for your business. We provide Simriz® -Rings from Freudenberg (Simrit) do to the unique durability of the product and the genuine care the people from Freudenberg have given us and the users of our -Rings. Double-acting pistons require pressure from both sides to force the piston along the bore, meaning that in order to properly seal them you must use a double-acting seal that can seal the dynamic pressure from both sides. Heating – To improve hydraulic seals’ elasticity, you can heat the seals before installation. Hydraulic cylinder seals cost the manufacturer pennies. The energizer ensures constant pressure on the sealing lips. FlexiSeals are PTFE sealing devices energized by special metal springs to maintain lip contact during no or low pressure service. Global -Ring and Seal, LLC is a master distributor of -Rings, Backup Rings, X-Rings, Cord Stock, and related seals, servicing industrial distributors worldwide. PEEK – For applications with higher pressures PEEK back-up rings are recommended, in place of Nylon or PTFE back-up rings. For heavy duty hydraulic seals used on the main ram of an extrusion press, rubber fabric chevron seals are the chosen solution to ensure maximum durability and reliability. If you’re looking to optimize your use of hydraulic seals over time, you’ll want to screen manufacturers for matching versatility. In the case of gauge control cylinders for example, short strokes and high frequencies have to be accommodated whilst imparting minimal friction aor stick slip. Symmetrical proﬁles are designed to act as either rod or piston seals, allowing one part to function in two applications.