Emerson 450XL manual Far-Reaching Applications

Compression and Oil Rings

The 450XL piston ring set consists of three compres- sion rings and a single, special oil scraper ring for keeping oil consumption to an absolute minimum.

Heavy-Duty Crankshaft*

An over-sized crankshaft pin diameter provides years of rugged, dependable duty, while the larger bearing surface allows for higher pressure differential capabi- lities.

Connecting Rod Bearings*

Vilter’s unique oil circuit drilling arrangement ensures proper hydrodynamic lubrication of insert bearings throughout the entire compression process. Rod bearings are specially designed to supply lubrication to the piston pin bushing at all times.

Double Bellows Shaft Seal

The 450XL shaft seal, designed to specific Vilter specifications, is manufactured from materials strictly used for industrial refrigeration applications. Seal unit assembly consists of two opposed seals – one sealing from the atmosphere and the other from the crank- case. Mating seal surfaces are lubricated and cooled by circulated oil.

Single Casting Frame

The single casting frame incorporates suction and discharge manifolds plus bearing supports. It’s cast to exacting tolerances from a high grade of cast iron to withstand extreme changes in heat and pressure. The castings are notably free from porosity and internal strains, and display excellent wearing qualities.

*Patented Design

Even with all these built-in features, you’ll still find the 450XL to be extremely cost-efficient. This compressor has a whopping cylinder displacement of 84,5 m3/h while running at 1200 RPM. And the high isentropic efficiency of the 450XL means its COP is second to none when compared to other compression systems.

The 450XL can be installed almost anywhere, even on an upper

floor if necessary, since vibration is kept to a minimum. Noise level is low too, due to the use of quickacting, precise ring plate suction and discharge valves.

Far-Reaching Applications

The 450XL is so versatile it can handle almost any refrigeration system conditions. Up to 24.1 bar maximum discharge, and up to 10.3 bar maximum suction with a maximum 17.2 bar pressure differential. At different compression ratios, too, from 8:1 for am- monia to 14:1 for R404A. In V-belt configurations all the way up to 224 kW, or

direct drive setups up to 285 kW. And it’s usable for both 50Hz and 60Hz applications up to 1200 RPM.

The graph (Figure 2) on the next page depicts the broad range of applications that the 450XL covers.

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