Maintenance Technology June 2015 - (Page 32)

TECHNOLOGY SHOWCASE 1 HIGHER-THRUST SPUR GEARBOX Rotork's recently introduced IS21 gearbox adds higher thrust ratings to the company's established lineup of multi-turn, thrust-taking, spur gearboxes. Retaining most parts of the Rotork IS20 design, the IS21 incorporates a new F60 cast-ductile-iron thrust base, thrust bearings, spigot ring, and output sleeve. Thrust ratings have increased to 4,350 kN for manual operation and 2,900 kN for motorized operation, or 30% more than the previous maximums. Corresponding maximum output torques have increased to 4,6100 Nm and 43,386 Nm, respectively. Suitable for the operation of gate, globe, and sluice valves; penstocks; and designed with customer stocking in mind, all IS gearboxes feature removable output sleeves for separate spindle machining. The units' standard IP67 watertight and temporarily submersible enclosures can be optionally increased to IP68, and the standard operating-temperature range of -40 to 120 C can be expanded to suit specific high- or low-temperature demands. MECHANICAL &HYDRAULIC SOLUTIONS Rotork plc Bath, UK 2 NEXT-GEN TEFC VERTICAL MOTORS Baldor has launched a new above-NEMA vertical P-base motor platform. The Totally Enclosed Fan Cooled (TEFC) G series is available in a power range of 200 to 900 hp, in frame sizes 5,010 to 5,012, at a variety of voltage ratings including 460, 2,300, 4,160, and 6,600. The entire platform has a cast-iron frame with a steel fan cover, and TEFC Enclosure in a more compact design than the previous generation. Designed for pumping and fan applications, the units meet standard NEMA-specified P-base dimensions for vertical-pump applications or horizontal mount for tunnel-fan applications. The G-series models feature a grease-lubricated ball bearing on the drive end with a thrust bearing on the upper (non-drive end) as standard. Oil lubrication and different bearing arrangements are optional features for applications subject to heavy loading. Options such as certifications to meet oil & gas-industry needs, including IEEE841 to 500 hp, API541 and API547 above 500 hp are available, as are nonreversing ratchets that control motor backspin upon de-energization to protect an entire pumping system. Baldor Electric Co. Fort Smith, AR 32 | MAINTENANCE TECHNOLOGY JUNE 2015

Table of Contents for the Digital Edition of Maintenance Technology June 2015

My Take
For On The Floor
Compressed Air Challenge
Friction, Fluid Optimize High-Inertia Systems
Improved Culture Cuts Downtime
Maximimize Power-Plant Skills
Gateways Make Systems Multilingual
Technology Showcase
Lubrication Checkup

Maintenance Technology June 2015