Hydraulic seals and pneumatic seals are designed as per the cylinder working pressure, cylinder speed, operating temperature, working medium and application. 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.
In this case, a combination of PTFE composite seals and wipers would be used to ensure superior sealing performance and a long service life. Cutting edge technologies include multiple sealing lip systems, shock-load resistance, low friction and ultra-dry capability. The distinctive types of sealing positions and directions that are used for hydraulic and pneumatic seals are axial seals, rod or internal seals, external or symmetric seals and piston seals. There are many pieces of equipment that require precise motion control and sealing within the medical industry, and with ever-increasing technological developments, the demand for specialist sealing materials and products will only grow. The lip can also scrape any contaminants from the rod surface, giving them the title of double-edged wiper seals”. The four-lobed design provides twice the sealing of a standard -ring, but requires less squeeze to maintain an effective seal. These wipers provide excellent performance on rods or rams in hydraulic and pneumatic applications. It should also be noted that while all hydraulic seals are important, not every single one is equally important. Allied Metrics is a leader among hydraulic cylinder seal manufacturers. Wear Rings are used to retain the piston centralised. No. 3 – Chemical breakdown of the seal material is most often the result of incorrect material selection in the first place, or a change of hydraulic system fluid. Lip seals are made of many different elastomeric materials, including polymers, plastics and rubbers, and they are effective in providing a seal in revolving machinery and equipment. The wiper is not a pressure sealing element. For the vast majority of hydraulic applications, hydraulic seals are a non-optional component; it simply isn’t practical or reasonable to manufacture and use systems which do not use a number of hydraulic seals. Hydraulic cylinder Piston seals are a variation of the rod seals available as single-acting or double acting based on the capability to seal dynamic pressure either on one side or both sides. Wiper seals scrape dirt, chips or moisture from the piston rods as it them into the retract to the system. This allows to match the seal to many different types of cylinders, without making quality and price compromises. They are used to prevent the hydraulic fluid from flowing across the piston, from leaking past the interface between the rod and the head and to keep it from leaking to the outside of the cylinder. RTA Rod Seals: These Single Acting seals are used in hydraulic cylinders that have small groove dimensions. Make sure you confirm all relevant compliance issues for general use of hydraulic seals in your application, as well as identifying any relevant standards based on industry, application, environment, etc. A lubricant in the space between the sealing lip proper (primary lip) and additional (secondary) lip can reduce wear and delay corrosion. Hydraulic seal manufacturers generally fabricate seals from rubber or metal, and in some cases leather or felt. We supply wipers, rod u-seals, rod buffer seals, piston seals, wear rings, U-seals, vee packings, individual vee rings & adaptors, piston cups, T seals, piston assemblies, piston seal assemblies, piston rings, wiper rings, oil seals, ‘’ Rings, backup rings, quad rings & retainer rings, as well as bushes, teflon bushes & self aligning bearings for the cylinder eyes. Given the working conditions found in many of these industries, these seals need to be built to withstand high pressure. American Seal & Packing Loaded Lip Seals are molded from 92 Durometer Urethane with a 70 Durometer Nitrile energizer. Toughest of the elastomers used for -rings, characterized by high tensile strength, excellent abrasion resistance, and tear strength. Scrapers or Wipers scrape dirt, foreign particles, chips or moisture from the piston rods as they retract into the cylinder, preventing contamination. Piston seals are dynamic hydraulic seals that are used to prevent the passing of any fluid beyond the piston as the system pressure forces the piston down 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. skived PTFE film &tape 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.
The important functions of hydraulic seals includes preventing leakage, protecting the system from contamination and thus improving the life span of hydraulic systems. The softest -rings are 50 and 60 shore A and stretch more easily, exhibit lower breakout friction, seal better on rough surfaces, and need less clamping pressure than harder rings, For a given squeeze, the higher the durometer hardness of a ring, the greater is the associated friction. Multiple sealing lips. Available as single-acting and double-acting types, these seals can also be used with guide rings and back-up rings. Sealants, Seals, Gaskets and -rings are compulsories item for hydraulic components and systems. A rod wipers main function is to keep the rod and cylinder clean and free from foreign matter preventing premature failure. Also known as scraper seals, they are often used together with other sealing components to let a ram rod pass through the inner bore of a seal, while preventing leakage. And while we don’t perform cylinder repair, we do supply the seals necessary to replace your parts. Piston seals separate applied pressures between the piston and rod side during stroke movement and during the interim and final position. Wide range of materials available. The sealing force compensates for high-pressure to maintain a positive seal. Click here to view all types of Reciprocating Seals , specifically Hydraulic Seals or get in touch with an FTL engineer today using our live chat. Polyurethane has a high load-bearing capacity and because of this characteristic not only is it an ideal material for hydraulic seals but also for load wheels , heavy duty couplings, metal-forming pads, shock pads, expansion joints and machine mounts. Specifically, they seal the pressures during the stroke phase of the application. Mechanical, hydraulic & pneumatic seals feature multiple seal points, multi-lobed design, square cross sections & grooves on inside & outside dia. Piston Seals guarantee liquid or other media do not pass round the piston due to the system pressure pushing the piston down the cylinder amid a stress course. Rod wipers are used to clear dirt, debris and other contaminants from the rod so that the primary rod-sealing elements are protected. Rod Seals:These are used to prevent the leakage of lubricants from the cylinder. The Rod Seal is often the decisive factor for the function of the hydraulic cylinder in its entirety. Super Chemically Resistant Viton® ETP -Rings – Extreme Chemical Resistant Fluorocarbon provides significantly improved chemical resistance compared to standard FKM A type fluoroelastomers. Custom manufacturer of rubber, plastic & elastomer seals including hydraulic & pneumatic seals. Hydraulic fluid leakage continues to evolve as an important regulatory issue. The positive rake, lip profile provides an optimal amount of radial sealing load with minimal frictional resistance. It must ensure safe and leakage-free sealing under all system conditions, and at the same time it should produce as little friction as possible. Rod seals are vital to maintaining an efficient hydraulic system, as they are responsible for both preventing fluid leakage from within a hydraulic cylinder and protecting it against dirt and other exterior contaminates. The seal is obtained by means of the flared, flexible lips coming in contact with the rod or cylinder wall. Excluders – Used in a hydraulic or pneumatic cylinder to exclude or scrape the rod clean. Hydraulic seals are vital in machinery. Hoses, gaskets, -rings, tubing, seals and molded and extruded parts can be fabricated. Sealing Devices also provides molded rubber seals, extrusions, lathe-cuts, gaskets, packing, Teflon seals, mechanical seals, graphite, cloth, metal seals, -rings and metal rings, and a complete line of oil seals. Performance Sealing Inc (PSI) designs and manufactures a full line of high pressure hydraulic seal solutions. Piston and rod seals for medium to heavy-duty hydraulic cylinders. Mechanical seals prohibit fluid leakage around the rotating shaft in a state of extreme pressure, temperature and shaft speed.
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.