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AR®HT

AR®HT
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ABRASIVE-RESISTANT THERMOPLASTICS AR®HT is a proprietary thermoplastic material specifically developed for use as bushings, bearings and wear rings in pumps handling abrasive media up to 250°F (121°C). ARHT provides outstanding chemical, thermal shock and impact resistance, making it a better wear material than traditional rubber, ceramic or bronze materials. Greene, Tweed’s proprietary AR thermoplastic materials exhibit outstanding wear characteristics in media containing solids. AR combines excellent abrasive resistance, good dry run capability and superior vibration dampening characteristics with no hydrolysis or swell. ARHT works well in a variety of abrasive pump applications including those working with circulating water, open and closed cooling water, river water, screen wash and crude oil pumps. When using ARHT pump users can operate their equipment with much tighter • Circulating water pumps • River water pumps clearances, boosting efficiency and improving process reliability. • Crude oil multistage pumps • Screen wash pumps • Open and closed cooling water pumps • Sump pumps FEATURES & BENEFITS • Increased high-temperature range makes it ideal for hot water, crude oil and abrasive hydrocarbon applications • Improvement of pump reliability over traditional bearing materials due to lower wear in abrasive media Greene, Tweed manufactures ARHT machined components world- • Nongalling and nonseizing properties help avoid unplanned shutdowns due to pump failures caused by excessive vibration or dry-run startup centers, making them readily available in short-lead times. Greene, • Extends lifetime and operation of mechanical seals and pumps due to excellent vibration dampening characteristics range from diameters of 1 in. to 58 in. (2.54 cm to 147.32 cm) • Lower coefficient of friction aids survival in “off design” pump conditions, such as intermittent dry run, better than traditional materials like cutlass rubber wall thickness). • Low hydrolysis or swell makes designing parts easier and helps maintain their physical properties in water applications • Very good physical properties allow the bearings to receive impact from the shaft or shaft sleeve without breaking or cracking during operation Tweed’s on-site manufacturing capabilities allow us to produce simple or complex parts to our customers’ specifications. Billet sizes with lengths up to 8 in. (20.32 cm) (depending on diameter and © 2010, Greene, Tweed all rights reserved All trademarks are property of their respective owners. 01/10-GT DS-US-PP-067 • Easy to machine and install to exact finished dimensions, reducing pump repair turnaround times and lowering repair costs wide at our own QRCs (Quick Response Centers), dedicated machine

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GREENE, TWEED AR® SERIES VS. TRADITIONAL MATERIALS TYPICAL PROPERTIES* ASTM Method Color Specific Gravity Hardness, Shore D Mechanical Compressive Strength, psi (MPa) Elongation, % Flexural Modulus 0.5% Secant, psi (MPa) * When using ARHT in subambient applications interference fit adjustments and mechanical retention methods must be considered. Please contact GT engineering for guidance and design recommendations. AR1 Syn Pol ym thet er A ic lloy Car bon Gra phi te Cut lass Rub ber Service Temperature Range, °F (°C) The chart shows percent weight change (loss) per hour of Greene, Tweed’s...

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AR®HT 2Pages

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AR®HT
2Pages