“Industry challenges, such as temperature, hydrolysis resistance and bio-friendly fluid compatibility, will consistently drive the need for more robust sealing solutions,” said Joel Johnson, vice president of technology, Simrit. “As a materials and sealing innovator, Simrit anticipated these upcoming changes and developed next-generation materials for issues that our customer’s are now encountering. This forward-thinking allows us to serve our customers’ current problems with established and proven solutions.”

For customers currently using the Disogrin 9250 material, the NOK U641 urethane is an alternative solution that is hydrolysis/glycol resistant and increases the long term operating temperature of the system to 110°C with standard and biodegradable hydraulic oils. It can be run in the same tooling as Disogrin 9250 and has been a proven solution for more than a half decade. For those looking to significantly increase the life target of a system, substituting a NOK A505 NBR rod seal (with proper back-up) and a U641 buffer can double the life of this system.

NOK UH05 urethane is a hydrolysis/glycol resistant solution for 120°C systems with standard and biodegradable hydraulic oils. In particular, NOK UH05 (40°C to 120°C temperature range) seals have been successful in hydraulic cylinders exposed to extremely harsh conditions.

It is rare for a material to not only have this high of a temperature range in the industry (allowing for use in a Columbian coal mine), but also one of the lowest temperature capabilities (allowing for use in Antarctic applications). Traditionally, a manufacturer would require two different sealing packages for each application. Using a NOK UH05 (buffer) in combination with NOK G928 HNBR rod seal (with proper back-up) can double the life of a system at 120°C, while providing exceptional low temperature capabilities.         

For additional information or to speak with a Simrit expert about the company’s U641 or UH05 material solutions, stop by the Simrit booth (#S-13657) at the IFPE 2011 Show held at the Las Vegas Convention Center from March 22 to 26.

Simrit is part of the Freudenberg and NOK Group Companies, which have total annual sales of more than $7 billion. The global Freudenberg and NOK Group offers an extensive portfolio of precision-manufactured products for the aerospace, appliance, automotive, marine, medical, off-highway equipment, recreational vehicle and renewable energy markets. For more information, visit the Simrit website at www.simrit.com.

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Editor’s Note: For high-res images of Simrit’s UH05 material, please contact Adriana Ferrari at 248-269-1122 or aferrari@bianchipr.com.

Simrit’s CASCO seal design integrates sealing elements and contact surfaces in a single cartridge that press fits into a bore with complimentary assembly tools. Uniquely, the main lip is perpendicular to the shaft and axially loaded to extend service life, which also addresses difficult operating conditions, such as dynamic end play and radial run-out.

“Meeting and surpassing customer and application needs often requires integrating new thinking with established expertise,” said Joel Johnson, vice president of technology, Simrit. “Our CASCO Cassette Shaft Seal is just one example of how Simrit takes a different approach to sealing to ensure we’re continually providing our customers with solutions that further optimize their products and technologies.”

Applicable for unidirectional applications with a primary shaft range of 70 to 180 mm, the main lip of the design contacts a surface perpendicular to the shaft (rather than radially). It uses an axial (or side-located lip) to incorporate a hydrodynamic pumping helix feature that is molded into the lip and runs against a metal sleeve. This is augmented by the dynamic slinger effect of the rotating inner sleeve. Further, an integral excluder dust lip of non-woven polyester allows positive contact to the shaft, while preventing dirt ingress without high wear or heat build-up. 

Simrit’s CASCO Cassette Shaft Seal demonstrated positive results when tested (more than 55 times) under such extreme operating conditions as: extreme temperatures; abrasive fluids / chemicals; harsh environments; etc.  As a result, it offers a service life potential of more than one million miles. Further, the Simrit’s CASCO Cassette Shaft Seals provides:

• Extremely low torque drag with low heat generation and excellent wear resistance;
• Enhanced oil retention due to the centrifugal “slinger” action of the wear sleeve;
• Highly compatible Fluorocarbon (FKM) compound;
• Superior sealing performance;
• High shaft eccentricities and vibrations; and
• Integrated wear sleeve to effectively lower the complete system cost.

For additional information or to speak with a Simrit expert about the company’s CASCO Cassette Shaft Seals, stop by the Simrit booth (#S-13657) at the IFPE 2011 Show held at the Las Vegas Convention Center from March 22 to 26.

Simrit is part of the Freudenberg and NOK Group Companies, which have total annual sales of more than $7 billion. The global Freudenberg and NOK Group offers an extensive portfolio of precision-manufactured products for the aerospace, appliance, automotive, marine, medical, off-highway equipment, recreational vehicle and renewable energy markets. For more information, visit the Simrit website at www.simrit.com.

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 Editor’s Note: For a high-res image of Simrit’s Cassette Shaft Seals, please contact Adriana Ferrari at 248-269-1122 or aferrari@bianchipr.com.

“The precise evaluation of an application’s surface finish is critical to the overall effectiveness of the entire sealing system,” said Joel Johnson, vice president of technology, Simrit. “Based on the Abbott Firestone Curve and ISO methodology, our new factors modernize the standards for counter surface examination, which helps extend the life and increase the performance of sealing systems.”

Simrit determined that, while important, the traditional three testing parameters – R_a, R_max and R_z – were not adequate to accurately classify surface abrasiveness and a component’s potential to hold lubricant. To address current and future industry trends and expectations, Simrit developed an improved methodology that better identifies surface characteristics over a defined length and complete depth of the profile.

This improved methodology consists of the following attributes that work to more accurately define surface texture and, as a result, improve the life of the sealing system:

• R_k –  core roughness depth;
• R_pk –  mean height of the peaks protruding from the roughness core profile;
• R_vk –  mean depth of the valleys protruding from the roughness core profile;
• R_pkx –  the full peak height;
• R_vkx –  the full valley depth; and
• M_r – material ratios (dependent on R_pk and R_vk).

Initial in-house testing by Simrit indicates that the new parameters, through the more accurate evaluation of surface characteristics, are able to reduce part wear and extend system life. Additionally, Simrit’s newly identified methodology can be applied to numerous markets and dynamic applications.

For additional information or to speak with a Simrit expert about the company’s Surface Finish technology, stop by the Simrit booth (#S-13657) at the IFPE 2011 Show held at the Las Vegas Convention Center from March 22 to 26. For additional graphics, video and information visit http://www.simritna.com and select the Brochures or Media tab.

Simrit is part of the Freudenberg and NOK Group Companies, which have total annual sales of more than $7 billion. The global Freudenberg and NOK Group offers an extensive portfolio of precision-manufactured products for the aerospace, appliance, automotive, marine, medical, off-highway equipment, recreational vehicle and renewable energy markets. For more information, visit the Simrit website at www.simrit.com.

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Editor’s Note: For a high-res image or video of Simrit’s Surface Finish technology, please contact Adriana Ferrari at 248-269-1122 or aferrari@bianchipr.com.

Quote taken from the article:

Key points:
• Aerospace applications may call for seals that are fireproof, resist fluids, and work over a large temperature range.

• Viscoelastic properties help elastomeric seals work in subfreezing temperatures.

• Semiconductor and alternative energy applications require low-maintenance seals that resist chemicals and weather.

With the new HDR-2C rod seal, Simrit has designed a simple, one-piece component that combines outstanding low temperature flexibility – down to minus 50 degrees Celsius (minus 58 degrees Fahrenheit) – with exceptional extrusion resistance at high pressures. Recommended for use in lift and steering cylinder applications, the component consists of static and dynamic sealing edges made of low-temperature polyurethane 92 AU 21100 and an extremely extrusion-resistant backside made from Simrit’s 98 AU 928 polyurethane.

“We are excited to introduce our new HDR-2C rod seal at IFPE. Our design combines two materials into a single seal, providing larger extrusion gap widths and greater protection against housing and bore contact,” said Joel Johnson, vice president of technology, Simrit. “Additionally, the HDR-2C Bi-Component Rod Seal can increase service life up to 50 percent in applications characterized by high pressure impact.”

The new seal design allows for the use of cost-effective engineered plastic guides (rather than metallic guides) and allows for easy installation and additional cost savings due to the integration of the back-up ring in the seal. Compatible with standard housings per Simrit’s design philosophy, the new rod seal is an affordable way to improve cylinder performance.

Product engineers interested in additional information can visit the Simrit booth(#S-14005) at IFPE 2008, held at the Las Vegas Convention Center from March 11 – 15. Interested media attendees can register to attend the Simrit press event on Wednesday, March 12 from 3 to 4 p.m. in room N249-251. Please see editor’s note for R.S.V.P. information.

The Simrit Division is based at Freudenberg-NOK’s headquarters in Plymouth, Mich. and is part of the Freudenberg and NOK Group, which has total annual sales of more than $12 billion. Simrit offers an extensive portfolio of sealing solutions for the industrial, aerospace, appliance, diesel engine, marine, off-highway equipment, oil and gas, recreational vehicle and semiconductor markets.

For more information, visit the Simrit website at www.simrit.com.

Simrit Encoder and Magnetic Seals

PLYMOUTH, Mich., Feb. 20, 2008 – To demonstrate its expertise in encoder design and development, Simrit – the industrial sealing products division of Freudenberg-NOK and global supplier of elastomeric seals and custom molded products – will exhibit its Active Elastomeric Encoders at the 2008 International Exposition for Power Transmission (IFPE).

Active Elastomeric Encoders, also known as Multi-Pole Magnetic Encoders, are used in engine crankshaft, camshaft, axle and transmission applications to accurately monitor the speed, timing and position of a system.

Simrit’s design utilizes a proprietary formulation of a ferrite loaded polymer that is molded in a desired geometric shape and magnetized to a specified pole pair configuration. The ferrite material provides an alternating north and south magnetic field, which is read by a sensing element. Technology on the sensor provides a digital output signal to the vehicle controller, which in turn uses the information to precisely control a given system.

Simrit’s Active Elastomeric Encoders offer the following benefits:

• Compact packaging – integrates the magnet into the encoder, rather than in a large sensor, allowing for compact design and component integration;

• Air gap sensitivity – provides significantly larger air gaps (greater than 3 mm), while maintaining complete functionality and minimizing the effects of misalignment and air gap variation;

• Consistent signal quality – maintains a consistent signal at all speeds with no loss in quality;

• Zero speed detection – provides a constant digital output down to zero speed;

• Cost effectiveness – integration allows for the reduction of parts, as well as simpler installation and serviceability;

• Simple assembly – due to technology integration and modular sub-system design, many components can be assembled in one step; and

• Flexibility – can be magnetized in any pole pair configuration, allowing the technology to be used for antilock braking systems and engine modules.

Additionally, Simrit’s encoders are chemically resistant to typical application fluids, including engine, transmission, axle and general lubricating oil, fuel, degreaser, road de-icer, brake fluid, anti-freeze and power steering fluid, and offer a high temperature physical resistance of up to 170 degrees Celsius (340 degrees Fahrenheit) with a magnetic resistance of up to 250 degrees Celsius (480 degrees Fahrenheit).

Product engineers interested in additional information can visit the Simrit booth (#S-14005) at IFPE 2008, held at the Las Vegas Convention Center from March 11 – 15. Interested media attendees can register to attend the Simrit press event on Wednesday, March 12 from 3 to 4 p.m. in room N249-251. Please see editor’s note for R.S.V.P. information.

The Simrit Division is based at Freudenberg-NOK’s headquarters in Plymouth, Mich. and is part of the Freudenberg and NOK Group, which has total annual sales of more than $12 billion. Simrit offers an extensive portfolio of sealing solutions for the industrial, aerospace, appliance, diesel engine, marine, off-highway equipment, oil and gas, recreational vehicle and semiconductor markets.

For more information, visit the Simrit website at www.simrit.com.

Joel Johnson, vice president of technology for Simrit, will discuss the company’s proprietary material and design solutions in a presentation titled “Wide Range Temperature, Pressure and Fluid Resistant Hydraulic Cylinder Sealing Systems” on Friday, March 14 at 2:30 p.m. in room S-229 located in the South Hall, Level Two, Bridge Meeting Complex.

Increasing industry challenges – including temperature and hydrolysis resistance, and bio-friendly fluid compatibility – continue to drive demands for better performing seal designs and materials. During his presentation, Johnson will describe Simrit’s new global materials – including NOK U641 urethane, G928 HNBR and NOK UH05 urethane – as well as a unique sealing design that offers high pressure system ability which meets industry and customer needs.

The new Simrit materials offer high temperature resistance (up to 120 degrees Celsius / 248 degrees Fahrenheit), are compatible with bio-fuels and resistant to hydrolysis and glycolysis. The new advancements presented by Johnson will help fluid power engineers design more robust cylinders for use in a variety of applications.

Interested parties who are unable to attend the technical paper presentation can visit the Simrit booth (#S-14005) at IFPE 2008 for information about the new materials and designs. The company is also hosting a media-only event on Wednesday, March 12 from 3 to 4 p.m. in room N249-251 to discuss its package of industry-specific sealing solutions. Please see editor’s note for R.S.V.P. information.

- More -The Simrit Division is based at Freudenberg-NOK’s headquarters in Plymouth, Mich. and is part of the Freudenberg and NOK Group, which has total annual sales of more than $12 billion. Simrit offers an extensive portfolio of sealing solutions for the industrial, aerospace, appliance, diesel engine, marine, off-highway equipment, oil and gas, recreational vehicle and semiconductor markets.

For more information, visit the Simrit website at www.simrit.com.

This two-part seal set, consisting of a polyamide (PA) slide ring for sealing and an elastomeric energizing element for producing pre-load, is designed to withstand extreme pressure (up to 800 bar) without extruding. The HDP 330 complements Simrit’s Merkel™ piston seal program, which is compatible with ISO 7425-1 groove standards for use in hydraulic cylinders in construction, agricultural and material handling equipment.

“Our polyamide HDP 330 piston seal offers cost-effective cylinder construction without sacrificing quality or durability,” said Joel Johnson, vice president of technology, Simrit. “The seal demonstrates extreme strength against gap extrusion and has the ability to withstand higher surface finishes that usually accompany drawn tubes. Additionally, it has the capability to traverse properly designed pressure ports, while preventing cylinder drift because of the precisely molded cross section and step cut geometry.”

The first part of the HDP 330 seal design is the sliding element, which consists of a fiberglass filled modified polyamide. The second part is the energizer or contact pressure element and is made from nitrile rubber NBR. High temperature, elastomer material HNBR energizers are also available. Together, Simrit’s new seal design offers a tight sealing function and drift resistance, due to special molding technology.

Offering dynamic and static tightness that is comparable to polytetrafluoroethylene (PTFE) piston seals, but at lower cost, Simrit’s new seal is interchangeable with O-ring energized seals. Its new design is quick and easy to assemble and is capable of running over properly designed ports, while also allowing for a greater bore surface roughness (compared to conventional seals). Additionally, its rectangular contact pressure element produces consistently high pre-loading force and offers high protection against twisting in the housing.

Product engineers interested in additional information can visit the Simrit booth (#S-14005) at IFPE 2008, held at the Las Vegas Convention Center from March 11 – 15. Interested media attendees can attend the Simrit press event on Wednesday, March 12 from 3 to 4 p.m. in room N249-251. Please see editor’s note for R.S.V.P. information.

The Simrit Division is based at Freudenberg-NOK’s headquarters in Plymouth, Mich. and is part of the Freudenberg and NOK Group, which has total annual sales of more than $12 billion. Simrit offers an extensive portfolio of sealing solutions for the industrial, aerospace, appliance, diesel engine, marine, off-highway equipment, oil and gas, recreational vehicle and semiconductor markets.

For more information, visit the Simrit website at www.simrit.com.