General Speciﬁcations, Engineering Speciﬁcations

General Speciﬁcations

The complete line of 450XL compressors is comprised of six models ranging from a nominal 88 kW cooling capacity 2-cylinder machine all the way to the high end of the scale – a nominal 704 kW cooling capacity 16-cylinder model. In-between are the 4, 6, 8 and 12-cylinder mid-size units. All 450XL compressors run at a maximum of 1200 RPM, and all are provided with built-in capacity reduction steps for economical operation at reduced loads. V-belt and direct-connected motor operation are also available through- out the entire range of 450XL models.

We have tried to make every centimetre count in designing the 450XL to ﬁt into even the tightest space requirements. The 450XL is a machine that provides displacement of 84,5 m3/h per cylinder, giving you maximum capacity in a minimum amount of space. There’s sure to be a 450XL model that’s a perfect match to your refrigeration application.

Engineering Speciﬁcations

The compressor shall have double shaft seal, double tapered, roller main shaft bearings.

Tri-Micro® oil ﬁlter and oil strainer that removes 95% of contami- nants as small as 3 microns in size; dynamically and statically bal- anced heavy duty crankshaft of ductile iron, also shot-peened on 6, 8, 12 and 16-cylinder models; spring safety heads; die-forged, steel connecting rods with replaceable bearing halves; aluminum type heat treated pistons with three compression rings and one oil ring; piston operated suction valve lifters to unload the compressor

for starting and to provide capacity control. The piston and connecting rods shall be assembled with a shrink-ﬁt wrist pin for higher load carrying capabilities and superior wearing qualities.

The compressor shall come complete with structural steel base and be equipped with the additional following standard equip- ments: crankcase oil thermometer and heater; oil ﬁlter pressure gauge with manual 3-way valve; oil failure switch; high and low pressure cutout; capacity control switches and unloader solenoid valves based on the number of steps of capacity reduction; water or refrigerant cooled oil cooler; suction, discharge, and oil pressure gauges complete with Stedy-Mounts® and shut-off valves; (water or refrigerant) cooled cylinder covers following your need.

The parameters for the motors selection shall be:

-Required power (kW)

-Frequency (Hz) and Rotational speed (RPM)

-Voltage (Volt) and phasing

-Direct coupling or V-belt drive

The compressor minimal cooling capacity (kW) shall be deﬁned for given:

-Suction temperature (°C) or pressure (barg)

-Condensing temperature (°C) or pressure (barg)

Compressors are to be manufactured by Vilter Manufacturing Corporation, Cudahy, Wisconsin, or equal as approved.

4512XL Direct Drive Recip Pak with Superseparator and VILTech Micro- Controller