LEYBOLD COOLPAK 6000-1 - 1 Description; 1.1 Design and Function

Description
1 Description
Cryogenic refrigeration units comprise:
– the compressor unit,
– the cold head, and
– flexlines.
These operating instructions describe the design and
operation of the compressor unit and the associated
flexlines.
The compressor unit shall be used only to operate cold
heads and other units in which cold heads are installed,
e.g. refrigerator cryopumps or cryostats. No other appli-
cation is permissible.
This compressor unit, COOLPAK 6000-1, is for use with
the following cold heads or cryo pumps only:
Cold heads: RGD, RGS, or COOLPOWER
580, 5/100 (..), 120, 120 T.
Cryo pumps: COOLVAC or RPK 5000 and larger.
For multi-unit operation contact Leybold.
Only components manufactured by Leybold may be
attached to the compressor units. The installation of
other components is permissible only after consultation
with Leybold.
These compressor units comply with all the require-
ments set forth in the European guidelines for awarding
the CE seal of approval. In addition, they satisfy the
requirements of Underwriters Laboratories (UL) and the
Canadian Standards Association (CSA); please refer to
the appendix for details.
1.1 Design and function
Compressor units are used to compress helium gas
which then expands in the cold head to produce low tem-
peratures.
Every compressor unit comprises the following func-
tional modules:
– helium compressor (1/1),
– heat exchanger (1/2),
– gas purifiers (1/3) and (1/4),
– power module (electrical supply unit).
The compressor unit and the cold head (1/7) are joined
by way of flexlines (1/5). The compressor unit, cold head
and pressure lines are fitted with self-sealing couplings
(1/6) and are charged with high-purity helium gas.
The helium compressor is sealed, lubricated and cooled
with oil. The oil is cooled with water in a heat exchanger.
After compression the helium gas is cooled in the heat
exchanger (1/2); oil is then removed from the gas at the
oil separators (1/3) and in the adsorber (1/4).
3
GA 12.137/2.02 - 05/2002
Fig.2 COOLPAK 6000-1 compressor unit