Hydraulic seals are often used for industrial and domestic applications (such as aerospace, electromechanical, climate control, filtration, fluid and gas handling, and process control) to facilitate the separation of liquids. Others are commonly referred to as Kalrez® -Rings (DuPont Dow), Chemraz® -Rings (Greene, Tweed & Co.), Isolast® -Rings (Trelleborg Sealing Solutions), and lesser quality brands such as Perlast (Precision Polymer Engineering), GPlast (Gapi) and Markez® (Marco). Since hydraulic seals are so critical to the efficiency of hydraulic systems, they are applicable across a wide range of industries. Piston Seals are radial seals. After the removal of all -rings, the parts that receive new -rings have to be cleaned and inspected to make sure that they are free from all contamination. Hydraulic seals of various makes sometimes have very long delivery times. Our offer includes high quality seals for hydraulic cylinders used in the industry and agriculture. When properly installed in a groove, an -ring is normally slightly deformed so that the naturally round cross-section is squeezed diametrically out of round prior to the application of pressure. For example, Parker Seal Company ran a series of brutal tests to determine how much fluid pressure a common nitrile -ring can withstand without extruding into the gap. KAF’s lip design was developed with integral preloading to be automatically spherical plain bearing under high and low pressure. 4. Preventing blowouts: Blowouts on oil plants can be reduced to a great extent by using industrial seals. The main tasks of the seals are retaining lubricants, excluding contaminants adn maintaining the hydraulic pressure. X rings (also known as quad or square rings) are, in essence, enhanced versions of -rings. Wiper seals remove these contaminants when they retract into the cylinder. Our hydraulic seals are outfitted with seven precision-manufactured components. The UTS seal has small dimensions and has been created for cylinders under possible high pressure and speed variations. This allows pressure build up on one side of the piston, making the Cylinder extend or retract. Seal House offers a comprehensive range of Rod Seals in a variety of styles and materials to suit most applications. These seals protects the rod seals from the damages caused as a result of pressure rise. Based on criteria such as operating temperature, chemical interactions, pressure and fluid types, we select the materials that can handle each environment best. An elastomer which provides dynamic and static sealing against the shaft. A sealing lip has an edge which is formed by pressing, cutting or grinding and is normally pressed against the counterface on the shaft with a defined radial force by a spring. A high pressure hydraulic seal is usually surrounding rods, rams, glands or the piston and used a different design or combination of interlocking lips and components. The seals are located in the piston, on the cylinder head or on the rod shaft. The uses of rod seals vary from medium to high-duty applications with robust sealing effects. Types od seals include Vee-ring packings, urethane U-seals & polyurethane U-seals & double reversed packing sets. Fluid type, pressure, temperature requirements, speed of movement, environmental conditions chemical contact and many more factors are considered when choosing the most suited material. Hydraulic wear rings guide the piston and rod within the cylinder, absorbing forces and preventing metal-to-metal contact. Please see our products below and a Catalogue of hydraulic seals (PDF file, 11 MB). They are internal to the cylinder head and seal against the cylinder bore, preventing fluid flow. Skega’s success in this field has been built up around the well‐tried ‐ring seal which is combined with a new type of support ring and guide ring, produced in a new material and protected by the Swedish Patent No 221178. They have an enhanced extrusion resistance at high pressure and low temperatures and are used with heavy-duty cylinders. Dynamic (used when parts are in motion) or static (fixed application), different types of seals, each have their own role to play, in ensuring a cylinder runs as smoothly as possible. CDK Seals started out as a family-run business to supply PTFE seals, spring energised seals, rubber mouldings and hydraulic seals.
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.
High pressure, medium used, extreme temperatures, aggressive chemicals, working environment and legislation standards will all have an impact on the chosen material of seal. A hydraulic sealing product is actually a family of products used to seal reciprocating, oscillating or slow rotational movements caused by hydraulic equipment. As system pressure increases, the -ring is energized and forces the lips outward, changing its behavior from a squeeze type seal, to a traditional leap seal. Imperfect mating parts require some type of sealing device to be inserted between them to seal against loss of liquid, gas or solid fluids or particles. Chesterton’s broad range of high-performance hydraulic seals are made from exclusive polymer materials for use in a wide range of demanding industrial sealing applications. Over four million seals in a variety of case and lip styles. PTFE is the chemically inert of the -ring materials. Wear Rings are guiding elements that snap onto a shaft, both piston and rod, to keep metal from contacting metal that will damage and score the surface of a cylinder. Rod Seals are radial internal seals. Techné presents a compact range of hydraulic seals to fit your requirements : rod, piston seals, wipers, guiding rings and static seals on stock. V-Seals and V-Rings offer all rubber, one-piece construction of resilient seals to protect rotary shafts from dirt water and contaminants and extending bearing and shaft performance. For designs of medium to high pressure, it is recommended that fabric reinforced -rings be utilized. Piston seals are used in both pneumatic and hydraulic seals. The wiper seal needs to fit both the rod (dynamic) and also to the housing (static). Piston seals specifically work by preventing leakage or fluid flow across the piston. HydraPak stocks a substantial selection of hydraulic and pneumatic seals. Daemar’s line up of hydraulic seal products has been developed to provide exceptional value by combining the quality and performance that design engineers require with the total cost of ownership savings that today’s businesses demand. Wear rings or guide bands serve no sealing function. Shaft seals are tools that help to prevent the contamination of hydraulic shafts. 10. Wear-resistant: Typical hydraulic seals are wear-resistant and thus can be used in mining and extraction of minerals. When pressure is applied, it tends to force the -ring across the groove, causing the ring to further deform and flow up to the fluid passage and seal it against leakage. The U-ring and U-cup seals pressure in only one direction; therefore, the lip of the packings must face toward the pressure. These Parker seals and Parker -rings are offered in a variety of materials and lip geometries for the best possible solution for a given application. Hydraulic Rod seals prevent leakage of fluid from within the cylinder to the outside while hydraulic piston seals prevent fluid from flowing across the cylinder head. Misapplication or use of non-compatible materials can lead to chemical attack by fluid additives, hydrolysis and oxidation reduction of seal elements. They prevent the leakage of fluid from within a hydraulic cylinder to the outside as the rod cycles back and forth (dynamic pressure sealing). Piston Seals or Piston Rings are used in hydraulic cylinders for fluid sealing. Whether you’re looking for standard sizes or need a full set of custom hydraulic seals, we have the ability to provide any shaft seal type with our cutting-edge machining services. WDA Wiper Seals: These double-function seals use the lip to prevent contaminants from building up, yet also have an additional element that prevents scoring on a seal. Careful analysis of your system’s performance over time is important to optimizing performance with hydraulic seals. Dynamic Hydraulic Seals are Rod Seals and Piston Seals. High quality Hydraulic Seals, -Rings, Back-up Rings, U-Seals, Rod Seals, Piston Seals, Wear Rings, Buffer Seals, Vee Packing, Retainer Rings, Wiper Rings, Oil Seals, Cushion Seals, Custom Machined Seals, Pneumatic Seals, Aftermarket Cylinder Seal Kits for the fluid power industry.
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.