Based on the 6-cylinder compressor HG7, a selection of two-stage variants is available for extended use in intense cooling. The selection of the liquid intercooler unit is available for three different refrigerants: R404A (R507), R410A and R22. Basically it concerns different expansion valve assemblies. Therefore in the further descriptions only one option (e.g. HGZ7/2110-4 R22) is indicated.
The optional two-stage system is composed of:
Liquid supercooler
Expansion valve
Solenoid valve
Sight glass
Filter dryer
The two possible optional variants of the HGZ7:
1. Design
Intermediate pressure line mounted and insulated
Liquid supercooler, expansion valve, solenoid valve, two sight glasses, filter dryer everything enclosed separately for individual, external mounting.
2. Design
Liquid supercooler, expansion valve, solenoid valve, two sight glasses, filter dryer attached directly to the compressor, lined and insulated.
The highlights
Six-cylinder construction
Stages divided into LP / HP at the ratio of 2 : 1
Two-stage operation with liquid supercooler
Expansion valve adjusted to refrigerant and application
Extremely economical and reliable concept
HGZ two-stage
Current types
Displacement at 50 Hz (1450 rpm) m³/h
HGZ7
93.7 / 46.9
107.6 / 53.8
122.4 / 61.2
HGZX7
93.7 / 46.9
107.6 / 53.8
122.4 / 61.2
More information about the HGZ two-stage compressors (e.g. technical/performance data, drawings, spare part lists, operating limits) can be found in the compressor selection tool VAP via the following link: VAP compressor selection HGZ two-stage compressors
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