GEA Bock HG8 - Manual (Page 11)

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4.3 Pipe connections
4| Compressor assembly
ATTENTION Damage possible.
Superheating can damage the valve.
Remove the pipe supports from the valve for soldering.
Only solder using inert gas to inhibit oxidation products (scale).
The discharge gas connection can be moved upwards with an
adapter (accessory). This makes it easier to remove the com-
pressor from a refrigerating system.
Fig. 14: graduated
internal diameter
Pipe connections on the compressor are available for soldering or
welding (accessories). The discharge and suction line valves have
graduated inside diameters so that pipes with standart millimetre and
inch dimensions can be used. The pipe will be immersed more or less
deeply according to dimension.
The connection diameters of the shut-off valves are rated for maximum
compressor output. The actual required pipe cross section must be
matched to the output. The same applies for non-return valves.
4.4 Pipes
Pipes and system components must be clean and dry inside and free of scale, swarf and layers of
rust and phosphate. Only use air-tight parts.
Lay pipes correctly. Suitable vibration compensators must be provided to prevent pipes being
cracked and broken by severe vibrations.
Ensure a proper oil return.
Keep pressure losses to an absolute minimum.