How To Install an O-Ring in any Application

O-Rings continue to be the most widely utilized sealing product.  While the ‘Donut’ shaped profile has by and large been kept intact since their inception, continued elastomeric development has pushed o-ring temperature and chemical compatibility to limits unimaginable several decades ago.

Typically, O-Rings fail due to adverse effects of a number of factors, from improper installation and lubrication to incorrect size and design.  The collection of videos below will help you minimize installation errors that may lead to failure (be sure to bookmark this page for future reference).


How To Install an O-Ring – Standard Male Gland


How to Install an O-Ring – Standard Female Gland


How to Install an O-Ring – Face Seal Gland


How to Install an O-Ring – Dovetail Grooves


How to Install an O-Ring – Hollow O-Rings

Sealing Systems for Hydraulic Cylinders

Hydraulic Cylinders in High-Load Bearing MaterialsThe right mixture does the trick – even for seals used in hydraulic cylinders. But the optimal interplay of the individual seals is a delicate matter. To save its customers a great deal of time and effort, Freudenberg Sealing Technologies (FST) has developed five preassembled sealing systems. They contain all the components needed for specific customer applications.

Until now, it took extensive experience and even more stamina to assemble a sealing package for hydraulic cylinders. To start with, the selection is huge: The FST catalog offers well more than 100 different rod and piston seals as well as wipers. Moreover, the individual seals have to function in combination, ideally supporting and complementing one another. Due to this mutual influence, every change has an effect on the functionality and performance of neighboring components. The approach to the result is gradual and cautious.

SIMPLER, FASTER, INTEGRATED…

An Entire Solution in a Single Package

Freudenberg takes the customer out of the complex, tedious process of selection, adjustment and modification, providing integral sealing systems. The company has developed so-called ‘application cards’ that specific dedicated sealing systems for selected market segments and their applications. Here FST has gone beyond what is normal among its competitors. It doesn’t merely provide a fraction of all the components needed for hydraulic cylinders – it delivers all of them, from piston guides and seals, to primary and secondary rod seals, all the way to rod guides and wipers – and considers all their interactions in the process. As a result, a specialized knowledge of individual sealing elements is no longer needed. Continue reading Sealing Systems for Hydraulic Cylinders

CIP Composites Replace Bronze Bearings

CIP Composites - Replacing Bronze BearingsGallagher Fluid Seals is a distributor of CIP Composites full product line. CIP Composites are laminated polymer materials made by impregnating textile with thermoset resins. The physical properties of CIP materials make them superior bearing materials. CIP Composites offer design engineers an attractive, cost effective alternative to the traditional material used for bushings, bearings, wear pads, and thrust washers. The following describes the physical characteristics and application factors to replacing bronze bearings with CIP Composites.


Physical Characteristics

Coefficient of Friction

CIP Composites have lower coefficients of friction than bronze in both static and dynamic situations. It is common to achieve 50% lower coefficients of friction when transitioning to composites. Bronze bearings pose a risk for metal to metal contact if grease is non-existent or not sufficient to support the shaft, and may develop high break-away torque requirements after prolonged periods of rest. CIP Composites are self-lubricated, minimizing the concerns with lubrication systems, specifically in high load, slow speed, or oscillating applications. CIP Composites eliminate noisy stick-slip problems, extend operating life and reduces wear, making for better operating efficiency.

Moisture Absorption

There can be concerns with moisture absorption for non-metallic materials. Moisture absorption can create swell and expansion of the bearing material and potentially premature failure. Some common plastics in use today have water absorption rates as high as 5-7%, which can lead to bore closure of the bearing and seizing on the shaft. CIP Composites have a negligible absorption of less than 0.1%, and effectively eliminate this concern when moving away from a metallic solution.

Continue reading CIP Composites Replace Bronze Bearings

Form-in-Place Sealex® Joint Sealant

Sealex®Sealex® joint sealant, specially processed, 100% pure PTFE on a roll, provides soft, highly compressible gasketing for longer life and trouble-free sealing. Its form-in-place versatility also cuts maintenance and storage costs. The high compressibility of Sealex® enables it to effectively fill flange imperfections for a tight, leak-free seal. Under pressure, it provides a very wide, thin ribbon-like joint sealant. Unlike conventional PTFE which is prone to cold flow, Sealex® has good creep resistance and bolt torque retention properties.

Sealex® joint sealant does not support bacterial growth or cause product contamination and is FDA compliant. It has virtually no shelf-life concerns since PTFE is unaffected by normal environmental conditions.

It has excellent resistance properties to chemical attack. It is ideal for most chemical services at temperatures to 500°F (260°C) and pressure to 2,000 psi (138 bar). It is also suitable for cryogenic use to -321°F (-196°C).

Continue reading Form-in-Place Sealex® Joint Sealant

Continuous Molding Enables Production of Large-Size Elastomer Seals

Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.
Original content can be found on Parker’s Blog.


Continuous Molding - Vulcanization of Large Size O-RingsPrecision O-rings are manufactured by vulcanization in a closed mold using compression or injection molding. This makes it possible to produce O-rings in relatively small manufacturing tolerances and with good surface quality according to ISO 3601-1 and ISO 3601-3. Due to defined vulcanization parameters, precision O-rings exhibit consistently high mechanical properties across the entire circumference. This high quality level is an indispensable prerequisite for achieving consistently good sealing effects over a long period of time.

However, up to now, this production technology has been regarded in the sealing industry as not being economically feasible for O-rings in very large dimensions due to the enormous work and related costs involved in making extra-large molds. In addition, such large molds are extremely difficult to handle and therefore cannot be accomplished by many seal manufacturers.

Advantages of Continuous Vulcanization

The innovative manufacturing technology of continuous vulcanization used by Parker Prädifa, which does not involve failure-prone joints, enables the cost-efficient production of precision-quality O-rings with high mechanical load resistance in nearly any desired diameter. The technical properties of continuously vulcanized O-rings are comparable with those of O-rings produced by conventional compression molding. As a result of being molded, these XXL O-rings are quality products for challenging applications.

The surface qualities and tolerances correspond to those in ISO 3601:2012. However, this standard only covers cord thicknesses of up to 8.4 mm. To ensure that customers receive reliable and consistently high-quality O-rings where cord thickness is >8.4 mm, Parker Prädifa has developed an in-house standard based on ISO 3601:2012.

Customer-specific geometries for static and dynamic applications
In addition to precision-quality XXL O-rings, Parker Prädifa offers the development and production of customer-specific geometries in large diameters. A wide range of materials is available according to the application requirements.


Case study: Sealing solution for centrifuge (pharmaceutical industry)

Continuous Molding - Vulcanization of Large Size O-Rings

The challenge >> In the large-scale industrial production of semi-synthetic antibiotics, up to 500,000 liters of antibiotics are produced per batch. For such large-scale production to be economically feasible equipment of corresponding dimensions is required. In addition to large fermenters with diameters of several meters in which the biotech antibiotic is bred, centrifuges of similar dimensions are utilized to separate the antibiotic from process agents. Leakage must be prevented at all cost for safety and economic reasons. A leaking centrifuge might contaminate the antibiotics, resulting in high financial losses or, worse yet, in health and environmental hazards.

The solution >> Parker Prädifa was involved in the project at an early stage to develop a reliable sealing solution. The utilization of continuously vulcanized, i.e. jointless precision O-rings ensures the requisite reliability. Besides the seal design, the compound properties, particularly temperature and media resistance, play a key role. In addition to permanent temperatures of 250 °C, the seal has to withstand the aggressive media used in antibiotics production. The Parofluor® (FFKM) compound V8920 was selected as the suitable material for this application.


Case study: Lip seal ring for lithography system (semiconductor industry)

Continuous Molding - Vulcanization of Large Size O-Rings

The challenge >> The development of a new lithography system for semiconductor manufacturing posed the challenge of sealing two halves of a housing. Due to the tolerance situation in producing the respective housing halves, there was a risk of a gap of up to 0.5 mm occurring between the two halves in the assembled housing.

The solution >> In sealing technology, the gap dimensions to be bridged are typically between 0.05 mm and 0.25 mm. As larger gap dimensions available for sealing in the groove in this application could not be reliably sealed, or only by entailing a higher risk of leakage, with a solid seal such as an O-ring, a conventional O-ring sealing solution was not selected here, but a profile seal featuring a lip design. This seal was developed using Finite Element Analysis (FEA) to ensure reliable sealing of large gaps and tolerance variations in the seal groove between the two halves of the housing. In addition, the shape of the seal prevents twisting during installation and reduces the required assembly forces.
In the selection of the seal compound, high purity requirements had to be considered. Due to specific post-curing processes, the FKM compound V0747 with low outgassing properties achieves outstanding results.

More information
EMG Report 07/2017, Page 22
Brochure: XXL Size Seals and Molded Parts


This article was contributed by Stefan Reichle, Market Unit Manager Indsutry, Engineered Materials Group Europe, Prädifa Technology Division.

Source: http://blog.parker.com/continuous-molding-enables-production-of-large-size-elastomer-seals-in-precision-quality

Hydra-Just® Saves Chemical Plant $100K

Hydra-Just® Sealing SystemA chemical plant in northeastern Ohio could not keep their brine pumps sealed. The plant had been using titanium double mechanical seals on their ANSI pumps, but time and again the corrosive brine destroyed the $1,500 seals within 6 weeks of installation.

With 11 pumps on the brine system, the plant was spending over $100,000 a year on seals alone. As significant as that cost was, it paled in comparison to the lost operating time and potential health and safety issues.

The plant turned to Garlock for a solution and agreed to test the Hydra-Just® rotary seal. The results speak for themselves; the Garlock Hydra-Just® seal provided two to three times the service life as the titanium double mechanical seal and did so at a fraction of the cost. Additionally, it made for a safer workplace and substantially increased production uptime. As a matter of fact, the Hydra-Just® seal has worked so well that the plant is now using it on all 11 brine pumps.

For Industrial Pumping Applications with High Potential for Water Consumption

Hydra-Just® Sealing SystemThe Garlock Hydra-Just® is a leak free, no dilution Engineered Sealing System designed for industrial pumping applications with high potential for water consumption reduction. This system not only provides water and energy savings, it can withstand conditions in which mechanical seals would wear prematurely and have catastrophic failure. The unique HYDRA-JUST® design allows it to survive system upsets, just as the seal’s chemical and abrasion resistant components allow it to excel in your toughest applications. Additionally, the excellent heat dissipation properties enable the seal to be maintained with as little as two (2) U.S. gallons per hour.

Applications

  • Slurries, non-clarified media
  • Replacement for mechanical seals
  • Refiners
  • Bottom outlet devices
  • Kaymr digesters
  • General industry

Hydra-Just® Sealing System

Protect Pillow Block Bearings from Failure

Orion Engineered Seals - Pillow Block BearingThe Orion Engineered Seals patented Bearing Protection Device (BPD) represents state of the art bearing protection technology and is the premier non-contacting bearing protection device offered. The BPD was designed with an understanding of the nature of the bearing housing environment under all operating conditions and utilizes the laws of physics to create what has proven to be the best performing and most cost effective way to protect the bearings of your rotating equipment.


Pillow Block Bearings

A pillow block bearing is made up of two components: a mounting bracket (pillow block), and the bearing itself, housed in the mounting bracket.  These are usually used in low-torque, light-load applications.

Orion Engineered Seals - Pillow Block Bearing (BPD-PB)

The pillow block is mounted to a foundation, while still allowing the shaft and inner ring of the bearing to rotate freely. Pillow block bearing manufacturers usually supply some sealing arrangement for the fixture, to prevent dust and other contaminants from entering the housing, while also retaining lubrication (either oil or grease). Oftentimes, the OEM seals are inadequate, causing pillow block bearing failure.

Problem: OEM seal rings are not capable of providing long term bearing protection from harsh environments and inadequate lubrication retention.

Solution: The BPD-PB

  • Designed specifically for pillow block bearings
  • Incorporates all of the standard BPD contamination exclusion features
  • Designed for split pillow block housings
  • Extensive Dodge and SKF data base
  • Engineered for specific applications
  • Designed for ease of installation

The Orion Engineered Seals BPD can be used all throughout the plant.  There are a variety of designs already created for Pumps, Motors, Gearboxes, Pillow Blocks, Turbines, Oil Mist applications, Paper Machine Rolls, and many other specialty applications.  But as Orion’s name implies, they are manufacturing “Engineered Seals”, and would be happy to design a custom sealing solution for your worst application.

Gallagher Fluid Seals is your authorized distributor of Orion Engineered Seals BPD in the northeast and mid-Atlantic.  If you have questions about the BPD and how to implement it into your processes, please contact us today!

VIDEO: The Polyurethane Generation

Freudenberg Sealing Technologies has introduced a new generation of polyurethane for seals that set new standards. Freudenberg’s development of its own materials is an important core competency. The company has succeeded in manufacturing a basic material for seals with a far longer operating life than the polyurethane materials used so far.

Watch the video below to see how the seals of today are fulfilling the requirements of tomorrow.

Continue reading VIDEO: The Polyurethane Generation

Vesconite Hilube for Underwater Applications

Vesconite HilubeVesconite Hilube is a thermopolymer, designed for particularly difficult operating environments. Hilube is specifically recommended for moist and underwater applications. These include the pump and marine industry, where regular maintenance is not practically feasible or cost-effective. Displaying superior wear life, especially in poorly lubricated and dirty conditions, Vesconite Hilube has been shown to offer up to ten times the life of bronze bushings.

Vesconite Hilube incorporates an internal lubricant that translates into an exceptionally low friction coefficient. Combined with excellent dimensional stability, low wear rates and a high load-bearing capacity. Hilube has a PV rating (pressure x velocity) four times that of nylon bushings.

Vesconite is available in a wide range of rods, bushings, plates, and machined custom parts.

Hilube Key Features

No Water Swell
Fully saturated, Vesconite Hilube has a negligible moisture absorption rate (0.5%). Its linear swell rate of 0.07% allows for fine clearances in the majority of applications. By way of contrast, nylons absorb moisture by as much as 9% of total mass – resulting in high swell rates and critical loss of clearance, which can lead to seizures.

Continue reading Vesconite Hilube for Underwater Applications

3 Guidelines to Ensure Proper O-Ring Installation

Article re-posted with permission from Parker Hannifin Sealing & Shielding Team.
Original content can be found on Parker’s Blog.


Incorrect O-ring installation can lead to assembly damage causing leakage during the first pressure test. If the system does not pressurize properly, the entire piece of equipment should be disassembled and seals must be replaced. Depending on when this test occurs, multiple manufacturing steps could be in between the seal installation and the first step where leakage can be identified. If O-ring damage happens with high frequency, you could be wasting time and money on seal replacement. Luckily, there are some easy steps that can be followed to help prevent this from occurring. Parker’s recommended guidelines for installation include always using lubrication, good gland design, and ensuring correct sizing.

Lubrication Makes Installation Easier

O-Ring Installation - Parker O-LubeUsing lubrication is an essential facet of proper installation. Lubrication reduces surface friction between the O-ring and mating surfaces, allowing the O-ring to seat in the groove with very little difficulty. In male and female radial seals, lubrication will reduce installation force and create a smooth transition as the piston is inserted in the bore.

Choosing the proper lubricant requires careful consideration of your system. You must ensure the lubricant choice is compatible with the material being used, suitable for the temperature range of the application, compatible with the system fluids, capable of producing a high surface tension film, and does not clog system filters.

Continue reading 3 Guidelines to Ensure Proper O-Ring Installation