6
General Specifi cations
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 fi t 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 Specifi cations
The compressor shall have double shaft seal, double tapered, roller
main shaft bearings.
Tri-Micro® oil fi lter 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-fi t 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 fi lter 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 defi ned 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
