Oils For Refrigerant R290 (Propane) - Bitzer BSE32 Manuel

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Oils for refrigerant R290 (propane)

Characterising the oils
Oil Oil type
SHC226E poly-alpha-olefin oil
(PAO)
BSG68K polyalkylene glycol oil
(PAG)
Tab. 9: BITZER oils for R290
Material safety data sheets
Apart from this document, please observe the material safety data sheet (MSDS) for the respective oil. It contains
information on toxicity, handling, personal protective equipment and disposal of the oil. Material safety data sheets
for all BITZER oils are available on request .
Application range
DANGER
Risk of explosion and thus danger of death in the event of refrigerant outlet and in the presence of an igni-
tion source!
Refrigerant can ignite and also form an explosive atmosphere depending on its concentration in air!
Avoid open fire and ignition sources in the machinery room and in the hazardous zone!
Owing to the particularly high solubility of R290 in customary oils, BITZER compressors are charged with a special
oil of a high viscosity index and particularly good tribological characteristics.
In view of the solubility, the design, operating mode and control of the compressor and the system are subject to
particular requirements. Low or insufficient superheat in operation and insufficient heating of the oil sump during
shut-off periods lead to a substantial reduction of the oil viscosity in the compressor. This results in reduced per-
formance, heavy wear on drive gear parts, increased oil carry over and foaming. Secure compressor against ''wet
operation'' and guarantee a sufficiently high suction gas temperature − for reciprocating compressors, suction gas
superheat must be at least 20 K!
• Low oil temperatures and a high suction side standstill pressure must be avoided. An oil heater is absolutely re-
quired and an additional pump down system must be provided if necessary.
• Avoid quick changes in suction pressure − risk of border lubrication due to strong gas discharge of the refriger-
ant from the oil and unstable suction gas superheat.
• Avoid quick changes in condensing pressure − risk of strong foaming in the oil separator!
For further information on the use of R290 in semi-hermetic compressors: see Technical Information AT-660
Technical data
BSG68K
Density at 15°C 1.003
Flashpoint > 200
Pour point
Kinematic viscosity
at 40°C
at 100°C
Tab. 10: Technical data of oils for R290 in BITZER reciprocating compressors
KT-500-9 // PDF Download
Applications
standard oil charge
option for compact refrigerating circuits
SHC226E
0.830
250
-46 -45
68 67
16 10
Unit
g/ml
°C
°C
cSt
cSt
Designation on compressor
"P" (e.g. 4VESP‑10P)
"Z"
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