UNCD® Components Improving the Performance of Rotating Equipment

Mechanical Seals

Hydrodynamic Bearings

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BenefitsEnhances Reliability – Increases Energy Efficiency – Survives Dry RunningAdvanced Diamond Technologies offers a choice of UNCD® products to cover a range of mechanical seal and bearing applications. UNCD T10™ and T30™ are specifically engineered for mechanical seals for fluid pumps, while UNCD T90™ is appropriate for hydrodynamic bearing applications.

Service RequirementsIntermittent Dry Running Outlasts state-of-the-art materials.

Poor Lubrication Operates in poor lubrication regimes such as hot water and light hydrocarbons.

Abrasive Extreme wear capabilities of diamond handles abrasive and/or erosive conditions.

Corrosive Diamond is highly chemically inert in all fluid environments.

High Temperature Diamond has a temperature limit in excess of 800°F.

Cryogenic Diamond can be used in cryogenic applications.

Improve Energy Efficiency Smooth diamond has a very low coefficient of friction which results in significantly lower heat generation and energy consumption.

UNCD® Components bring the durability and low friction of diamond to mechanical seals, hydrodynamic thrust bearings and tilting-pad bearings. UNCD Components are processed using patented and award winning diamond technology from Advanced Diamond Technologies (ADT). UNCD Components bring exceptional life and robustness to industrial equipment.

UNCD® Components Improving the Performance of Rotating Equipment

UNCD® – not just nano anymore…UNCD® is the brand name for a family of diamond materials that have been integrat-ed into a multiplicity of award winning products. The term UNCD is an acknowledge-ment of the origin of a variety of diamond which was developed at Argonne National Laboratory under the auspices of the U.S. Department of Energy and licensed to ADT. Because the properties of UNCD are finely tuned for each application, the UNCD family has been expanded beyond the original ultrananocrystalline-structured diamond material developed at Argonne. Today, the UNCD brand encompasses a range of diamond products of varying structures, grain sizes and properties – each optimized for the requirements of specific components.

Enhances Reliability Increases Energy Efficiency Survives Dry Running

UNCD Seals, developed in part-nership with a major pump seal manufacturer, were selected by R&D Magazine in 2008 as “one of the 100 Most Technologically Sig-nificant New Products of the Year.”

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UNCD® SOLUTION

54 Efficiency

Increases Energy Efficiency

Low Coefficient of FrictionLow friction enables UNCD Components to be paired with silicon carbide (SiC) primaries in applications that would otherwise require softer carbon fac-es due to intermittent dry operation or temperature sensitive media. UNCD’s lower friction can provide more robust single seal solutions in applications that might otherwise require the added costs and maintenance issues associated with double seals.

Enhances Reliability

Hot Water Test ResultsBy tuning the phenomenal wear properties of diamond, UNCD-brand diamond for mechanical seals for fluid pumps has been specifically designed to last longer than silicon carbide in normal operation, thereby enhancing the reliabil-ity of the entire seal and increasing the mean time between repairs (MTBR). The seal faces shown below were run against a conventional blister-resistant carbon counterface.

Surface condition of a UNCD seal face after running in 250°F water at 100 psig, show-ing almost no wear.

Surface condition of a silicon carbide seal face after running in 250°F water at 100 psig, showing deep grooves.

The coefficient of friction (CoF) of UNCD Components running against SiC primaries has been measured between 0.018 and 0.04, which is significantly lower than a comparable measurement of SiC against resin-bonded carbon or SiC against SiC (see graph below).

To validate the benefits of the friction measurements made on the CoF test rig, a slurry rig was instrumented to measure the temperature of seal chambers when pumping a 10 wt% solid abrasive in ANSI standard pumps. The seal chambers of the pumps using UNCD Components were found in field testing to operate six de-grees (Fahrenheit) cooler than those pumps using industry standard SiC face seals.

COEFFICIENT OF FRICTION

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C/SiC C/UNCD SiC/SiC SiC/UNCD

COF MEASUREMENTS OF UNCD SEALS RESULT IN AN EXTREMELY LOW VALUE OF 0.018

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UNCD on SiC

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Survives Dry Running

Severe Dry Running Test ResultsUNCD T30™ has been specifically designed to allow intermittent dry running and has a measured bond strength between the UNCD and silicon carbide (SiC) that exceeds the compressive strength of the SiC itself. While absolute run times depend on a given set of conditions, the data shown are for severe test conditions. Under these severe conditions, UNCD tested in customer trials showed up to 20 times longer lifetimes. T30 running against a SiC counterface continues to successfully seal after having been exposed to 35 dry running cycles of 5 minutes each. SiC running against a SiC counterface fails consistently after the first 90 seconds of dry running.

SiC at 3200 MPa (460 ksi) Critical Load. Diamond (T30) at 6400 MPa (920 ksi) No Failure.

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0SiC/SiC SiC/Carbon (P658RC) T30™/SiC T30™/Graphite-

loaded SiCT30™/T30™

COMPARATIVE ABILITY TO SURVIVE DRY RUNNING (MINUTES)

Dry Running

UNCD® Components Case StudiesAdvanced Diamond Technologies (ADT) has helped organizations, from large mechanical pump seal OEMs to major pump manufacturers, to improve the performance of rotating equipment. The award winning UNCD family of materials has enabled customers to enhance the reliability of their equipment, leading to increased mean time between repairs (MTBR), while surviving intermittent dry running. Along the way UNCD has won numerous industry awards for innovation and technology leadership.

Here is a sample of some of the solutions UNCD has delivered:

Light Hydrocarbon Application – Mechanical Seal Manufacturer

This mechanical seal manufacturer needed to solve the particular problem of an extremely short mean time between repairs (MTBR). With average MTBR of less

than one month, they turned to diamond to extend those lifetimes. ADT provided a UNCD T30 solution, running against SiC, which has been implemented and has exhibited over six months of operation without failure, an order of magnitude increase in the MTBR.

Municipal Wastewater Dry Running – Pump Manufacturer

This prominent Chicago-based pump manufacturer was having repeated seal failures due to suspected dry running of the silicon carbide seal faces during pump

start up in a municipal wastewater application. They needed a solution, and they needed it fast. Within a very short time-frame, ADT provided a UNCD Components solution that prevented the slip/stick failure from occurring, and the current seal with UNCD Components has been in operation approximately a year – and is still going.

Extended MTBF for Mixers – Pharmaceutical Industry

This Life Science leader provides cutting edge technologies for biopharmaceutical manufacturing. With field failures in the biotech community, unplanned bearing failure puts thousands of dollars of product at risk. ADT provides UNCD Bearings as a solution, extending the mean time between failure (MTBF) upon loss of lubrication from seconds to over hours.

Advanced Diamond Technologies, Inc. 429 B Weber Rd., #286 Romeoville, Illinois 60446 (815) 293-0900

www.thindiamond.com

email: info@thindiamond.com

UNCD is a registered trademark of and the ADT logo, T10, T30 and T90 are trademarks of Advanced Diamond Technologies, Inc. Specifications subject to change without notice.

© 2011 Advanced Diamond Technologies, Inc. All rights reserved.

This product is protected by one or more of the following U.S. and foreign patents: 5,989,511; 7,128,889. Additional patents pending. V20110817

See our ad inPUMPS & SYSTEMS

MTBRMechanical SealImprove

www.thindiamond.com48 East Belmont Dr. Romeoville, IL 60446

t: +01 815.293.0900 e: sales@thindiamond.com

Ask your mechanical seal provider for a recommendation & quotation or contact Advanced Diamond Technologies for more information.

Visit our booth (#1350) at the 40th Turbomachinery Symposium in

Houston, Texas from September 13-15, 2011

Cost effective advancement in mechanical seal face material technology

For most applications UNCD vs. SiC will be the optimal combination of mechanical seal face material characteristics*:

*For certain applications other face material combinations maybe recommended such as carbon graphite vs. UNCD or UNCD vs. UNCD.

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