Emerson Vilter 450XL Manuals

Vilter 450 XL® Compressor For Industrial Refrigeration 450XL Cross Section 2 The versatile VMC 450XL is now even better! While retaining all of the features that are exclusive to Vilter com- pressors, we’ve made several design improvements: • Piston • Connecting road and bearing insert • Crankshaft • Safety head • Capacity reduction system Even though we’ve made these specifi c changes, we’ve retained all of the exclusive Vilter features, including provisions for fast and easy servicing with components that are easy to access. The 450XL can operate with ammonia, halocarbon and even some hydrocarbon refrigerants. It works in extreme applications with up to a 17,2 bar pressure differential. It can be belt-driven up to 224 kW or direct driven all the way up to 285 kW. And it can run at high compression ratios all the way up to 12:1 with certain halocarbon refrigerants. Spring Loaded Safety Heads Protect against liquid slugging by relieving internal cylinder pressure if cylinders are subjected to an incompressible fl uid. Suction and Discharge Porting Maximum suction and discharge porting through the compressor achieves minimum pressure drop with valve plates that are made to exacting Vilter material and manufacturing requirements for long-term service. Piston and Connecting Rod The unique design of the piston and connecting rod assembly allows for movement only between the con- necting rod bushing and piston pin, while providing positive lubrication throughout the entire compres- sion cycle. Double Tapered Roller Bearings Energy-effi cient roller bearings enable the compressor to be used for high suction pressure applications as well as high belt-drive horsepower requirements. Tri-Micro® Oil Filter Removes 95% of contaminants as small as 3 microns in size. Allows full fl ow of oil at all times, resulting in reduced wear on compressor components. Combines extreme fi ltering capacity with the convenience of a throw-away recharge element. Filter is enclosed in a seamless drawn carbon steel shell with cast iron cover, and is equipped with a means for determining pres- sure drop across the fi lter. 3 Even with all these built-in features, you’ll still fi nd the 450XL to be extremely cost-effi cient. This compressor has a whopping cylinder displacement of 84,5 m3/h while running at 1200 RPM. And the high isentropic effi ciency 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 fl oor 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 confi gurations 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. 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 specifi c Vilter specifi cations, 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 4 Nominal High-Stage Capacities With its 114 mm bore and stroke, the 450XL provides up to 30% more capacity than similar size compressor units, all while main- taining a favorable COP ratio. Nominal high-stage ratings for the 450XL are shown in Figure 1 below. Complete detailed ratings for all 450XL high-stage models, plus rat- ings for 450XL booster compressors, special high suction pressure compressors, and even integral two-stage compressors, are avail- able for all major refrigerants either from the Vilter Sales Offi ces. These ratings are establised under the following conditions: • 1200 RPM • Saturated suction • No subcooling • No belt losses • All ratings are based on 60°C condensing temperature • Ratings are based on a 4-cylinder 450XL (454XL). For cooling capacity and approximate kW fi gures of other 450XL models, use a direct proportion to the number of cylinders of the 454XL. For example, use a 3.0 factor for determining the 12-cylin- der 450XL cooling capacity and approximate kW fi gures. 4516XL Belt Drive Recip Pak with VILTech Micro-Controller Figure 1 | High Stage capacities 450XL ratings Figure 2 | Broad Applications Cooling Capacity (kW) Absorbed Power (kW) Saturated Suction Temperature °C Suction Pressure (barg) Discharge Pressure (barg) Minimum Allowable Suction Pressure (barg) -0.8 barg Max. Discharge 24.1 barg 10.5 barg Max. Suction 17.2 Bar ΔP Max 2.07 Bar ΔP Minimum for Gas Unloading 0 Bar ΔP Minimum for Oil Unloading Maximum Motor kW