The top four causes of seal failure in hydraulic cylinders. We have hydraulic cylinder seals and kits for every need because we carry more than 26,000 items for farm, shop, home and garden. Cushioning seals minimize wear and noise in airpowered cylinders by preventing the piston from slamming against the cylinder body. Rod seals are the most critical seals in a hydraulic cylinder. Be thorough with instructions before orings and seals in the glands and piston.
Hydraulic rod seals for fluid applications trelleborg. We have a wide selection of replacement hydraulic cylinder seals from top brands including vickers, hydroline, atlas, miller, parker, sheffer and more. For assembly into a closed groove without installation tools, place the oring into the groove. Hydraulic seals standard loaded lip seal ucups rod. This allows pressure build up on one side of the piston, making the cylinder extend or retract. The double acting cylinder seal requires only small housing dimensions. These parts include hydraulic seals, cylinder repair seal kits, replacement cylinders, cylinder repair parts. It has become the hydraulic cylinder standard, where high pressure, high temperature, radiation, thermal fatigue, and reliability requirements make normal seals undesirable. The oil volume v necessary for a piston stroke is calculated from the effective piston area a and from the.
Rod seals are used in hydraulic cylinders for fluid sealing. A good working knowledge of available seal optionsand what ultimately. Instruction manual hydraulic cylinders abs group wi29 page 8 of 24914, nr. With hydraulic cylinders, there is more than meets the eye. By jerry whitlock hydraulic cylinder seals cost the manufacturer pennies. Contamination can cause significant damage to the rod, cylinder wall, seals, and. Aggressive hydraulics has provided s of hydraulic cylinder replacements for equipment in a variety of industries and applications. Some seals are thin, and if you dont install them evenly, then it may cause damage. Hydraulic seal kits cylinder repair kits quality seals fast. Please call your local james walker contact if the size you want is not listed. It contains technical explanations and data, calculation formulae, practical information and.
Please refer to the latest edition of our hydraulic sealing guide for all other information on our vast family of hydraulicrelated. Maxx hydraulics hydraulic cylinder seals, orings, seal. Nylon glass guide rings and five component compact seals to ensure longevity of a hydraulic cylinder in comparison to other alternatives. Provides optimum contact with the rod to keep out contaminants. Trelleborg sealing solutions offers a wide range of hydraulic rod seals that provide the ultimate in protection from ingress of media. Hydraulic seals hercules sealing products has the largest selection of seals in the industry, with repair parts for over 150 equipment brands such as caterpillar, john deere, komatsu, case, volvo and many more. Weve documented these cylinder replacements in our exclusively developed cross reference. Differential pressures acting on the piston to extend or retract the piston rod can be in excess of 400 bar 5 800 psi. Seal countersurface finish properties, materials, fluid media and gap extrusion are discussed in detail. The dynamic reciprocating motion between the piston and cylinder bore is another area of a hydraulic cylinder that uses dynamic seals.
Seals all of our cylinders utilize the latest in seal design from major manufacturers. The only guide you need to rebuild hydraulic cylinders. Seals by size hydraulic seals hercules sealing products. Hydraulic seals parker hannifin prdifa technology diision precision seals for hydraulics elastomer seals are functionally reliable components of fluid engi neering equipment and systems. With cylinder body held gently in a vise, insert piston, gland, end cap and rod combination using a slight rocking motion. Hercules sealing products canada hydraulic cylinder repair. Our hydraulic cylinder seals are made using the exact specifications of the original manufacturer to ensure a perfect fit each time. Their advanced level of sealing technology is the result of many years of development and field experience gained in the various sectors of mechanical. Piston seals maintain sealing contact between the piston and the cylinder bore.
They are external to the cylinder head and seal against the cylinders rod, preventing leakage of fluid from within the cylinder to the outside. Stateoftheart hydraulic piston seals can be precisely adjusted to a particular application with the selection of suitable materials. The rod seal is the most critical seal on any type of fluid power equipment preventing leakage of fluid from within the cylinder to the outside. Hydraulic seals and pneumatic seals are designed as per the cylinder working pressure, cylinder speed, operating temperature, working medium and application. Piston seals help ensure that pressurized hydraulic fluid does not move past the piston as it moves up and down the cylinder during a pressure cycle. They are internal to the cylinder head and seal against the cylinder bore, preventing fluid from flowing across the cylinder head. Hydraulic seal kits cylinder repair kits quality seals. If you need hydraulic rod seals, we offer choices for sizes and the number of seals you need. Cylinder seals hydraulic cylinder rodpiston seals cat.
Hydraulic sealing products size charts this document should be used in conjunction with the latest. Doubleacting cylinders are the most widely used cylinder types. For additional information call your local parker cylinder distributor. In addition, vents molded into the radius of the internal lip help prevent. Hydraulic piston seals, piston rings for hydraulic cylinders. Every series tz cylinder has its sixteen digit model code clearly marked on the product, impression stamped in the metal head or cap. Hydraulic seals are generally relatively soft, nonmetallic rings captured in groove or fixed in a combination of rings, forming a seal assembly, to block or separate fluid in. To prevent these contaminants from entering the cylinder assembly and hydraulic system, wiper seals also known as scrapers, excluders, or dust seals are fitted on the external side of the. Hallite offers a wide range of hydraulic rod seals for both singleacting and. We supply seal products to a variety of industries such as. It can be used in bidirectional sealing applications at pressures up to 5,000 psi.
Hydraulic cylinder piston seals are installed in a groove around the piston. Rod seals are also referred to as shaft seals sometimes. Piston seals hydraulic cylinder seals grainger industrial. Seal up hydraulic cylinder parts and see an improvement in efficiency and speed. How to installing piston seal hydraulic cylinder cara. Hercules sealing products canada has the largest selection in the hydraulics industry, with repair parts for over 150 equipment brands such as caterpillar, john deere, komatsu, case, volvo and many more. But that simple, inexpensive hydraulic seal can cost you thousands in downtime and loss of production if it fails. They are designed to retain hydraulic fluids, exclude solid or liquid contaminants, and maintain hydraulic pressure.
Wipers, scrapers or protector bellows machining information. Piston seals or piston rings are used in hydraulic cylinders for fluid sealing. Piston seals make a seal between their outside edge and the cylinder bore to prevent internal leaks. Resealing your hydraulic cylinders quickly and effectively is just one of the many ways you can help lower your operating costs and improve your machine hydraulic system performance. Sep 28, 2017 how to fix a leaking hydraulic cylinder, my first go at replacing seals with basic tools duration. Jun 10, 2017 this is 2 bore cylinder off a tractor that is need of some repairs. Polyurethane and ptfe materials mainly come into use. Leakage through the rod seal can reduce equipment performance, and also in extreme cases can cause environmental issues.
We have extensive inventories of chrome plated rod, steel honed tubing, cylinder components, hydraulic seals, rotary seals, and greaseless bearing materials. Hydraulic cylinders hydraulic system components grainger. Hydraulic cylinders at magister hydraulics are manufactured by implementing european technologies and setting a new bar for us standards. If you have a problem seal, focus on these four points to. Nowadays, hydraulic cylinders, and their associated control component assemblies, appear in numerous forms and sizes depending on the duties they must perform. Before the final assembly step of inserting the rod into the cylinder gland, elastomerenergized seals must be calibrated using a calibration mandrel or a long leadin chamfer with a rounded edge. Eaton hydroline industrial tie rod cylinders hcyigtm002e october 2011 5 j k e c a d l i i h g f b n5 design features heavy duty rod cartridge machined from gray iron for maximum bearing support and wear resistance unitized, threadless assembly is pilotfitted into the head on a precision bored diameter to assure true concentricity. The first chapter contains general technical information. Cat hydraulic cylinder rod seals can work in a wider range of operating temperatures than previous designs, without seal degradation. Hydraulic seals standard loaded lip seal ucups rod wipers. The oring store is a distributor of hydraulic seals, seal kits and cylinders for mobile and industrial applications. The proven pdfultrathan compound p5008 stands for high abrasion re sistance. Rod seals the rod seal is the most critical seal on any type of fluid power equipment preventing leakage of fluid from within the cylinder to the outside.
Heavy duty hydraulic cylinders series 2h 3h catalog hy0811144na parker hannifin corporation industrial cylinder division. The pressure acting on the piston seal increases contact forces between the piston seal and cylinder surface. Magisterhyd hydraulics hydraulic cylinder manufacturer. These parts include cylinder repair seals, cylinder repair seal kits, replacement cylinders, cylinder repair parts. We also offer a oneofakind custom seal configurator. Replacement seals, seal kits and hydraulic cylinders are stocked for well known names. Hydraulic cylinder rod seals pneumatic rod seals hallite. Cylinder seals hydraulic cylinder rodpiston seals cat parts. Hydraulic seals hercules sealing products cylinder. Parkers hmi series cylinders are designed to meet the. Cat hydraulic cylinder seals can help operators and owners get maximum machine productivity at the lowest possible cost. Cylinder diameters and all other dimensions conform to bs iso 5597. To contain the pressurized fluids in a hydraulic cylinder system and keep it in motion, a complex configuration of highperformance seals in two basic categories are required.
In combination with the freudenberg sealing technology geometries which have been proven a million times over they always provide the optimal solution. They are considered to be multipurpose hydraulic seals and are designed for significantly improved performance. Hydraulic cylinders operate in a variety of applications and environmental conditions, including exposure to dust, debris, or outside weather conditions. A hydraulic cylinder is a linear actuator used to push or. Seals and components seal and cylinder source scs, inc. The energizer ensures constant pressure on the sealing lips. Hydraulic cylinders and seals are used to lift beds and winches, operate presses, and to push, support, and press heavy loads. We use the latest seal technologies available to make sure when your equipment is repaired, it is completed with a quick turnaround and that it performs to oem standards or more efficiently than it was originally. Whatever your application, there will be a fundamental requirement for our. Hydraulic cylinders are linear actuators that provide backandforth movement when they are under pressure.
Rod seals the rod seal is the most critical seal on any type of fluid power equipment preventing. It is very important to keep the nearby operating environment as clean as possible and to keep the oil as contaminant free as possible. Seals are one of the most critical components in a hydraulic cylinder. Hydraulic cylinder systems are sealed using a complex configuration of high performance seals, and we at hallite offer a wide range of seals for applications within these cylinder systems. Maintaining a tight seal ensures that the cylinder maintains pressure. Iso standards for installation spaces of piston seals, rod seals and wipers.
The air bleed should be pointing upwards when the hydraulic cylinder is positioned horizontal. Loaded lip seals are very versatile and can be used as rod seals or piston seals. What types of seals are used in hydraulic cylinders. Hydraulic cylinder seals are used to seal the opening between various components in the hydraulic cylinder. Hydraulic cylinders incorporate exclusive suresealtm. The joint cut design compensates for ring and cylinder wear during operation. How to fix a leaking hydraulic cylinder, my first go at replacing seals with basic tools duration. Axially operated rods in hydraulic and pneumatic working cylinders, plungers and rod. Hydraulic seals for hydraulic cylinders the oring store. Buffering seals protect hydraulic cylinders from pressure spikes and shock in highpressure hydraulic applications. Hydroline industrial tie rod cylinders n5 an5 nfpa.
Rodgland seals to seal around the reciprocating rod or ram. Piston seals to seal between the reciprocating piston and cylinder bore. Lube inside of barrel, piston seals, and gland seals with hydraulic oil. Rod seals are pressfit into a housing bore with the sealing lip contacting the shaft. Hercules sealing products canada hydraulic cylinder. These tasks require a variety of different seal designs and performanceenhancing features.
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