Yamato Scientific Vacuum controller Vacuum controller - Manual (Page 13)

11
Corrosive Resistance
TABLE:
Corrosive resistance of the parts connected to gas
FPM: Fluoro Rubber, PTFE: Teflon
Part
Pressure
sensor
Solenoid valve Solenoid valve armature
Piping
tube
Joint
Material
Silicon
ceramic
nickel
Brass
(body)
FPM
(O-Ring)
FPM
(sheet)
SUS
(body)
PTFE Brass
Methyl alcohol ○ ○ Ч Ч ○ ○ ○
Ethyl alcohol ○ ○ ○ ○ ○ ○ ○
Isopropanol ○ ○ ○ ○ ○ ○ ○
Methyl chloride × ○ ○ ○ ○ ○ ○
Chloroform × ○ ○ ○ ○ ○ ○
Aceton △ ○ Ч Ч ○ ○ ○
Methyl ethyl ketone △ ○ Ч Ч ○ ○ ○
Benzene × ○ ○ ○ ○ ○ ○
Toluene × ○ ○ ○ ○ ○ ○
Ethyl acetate △ ○ Ч Ч ○ ○ ○
Hydrochloric acid
(20
℃ under5%)
Ч Ч ○ ○ △ ○ Ч
Hydrochloric acid
(20
℃ over5%)
Ч Ч ○ ○ Ч ○ Ч
Sulphuric acid
(20
℃ under5%)
Ч Ч ○ ○ △ ○ Ч
Sulphuric acid
(20
℃ over5%)
Ч Ч ○ ○ Ч ○ Ч
Sodium hydroxide
(20
℃ under10%)
Ч Ч ○ ○ ○ ○ Ч
○ :suitable for use, △ :not recommended, × :unsuited
NOTE 1
The corrosion resistance above shows the case when samples are immersed in solvent or the
like. Since the product's gas-joints are exposed to low-concentrated steam that can not be
trapped by the condenser（cooler）, the joints are not corroded soon. However some sort of
rubber might swell depending on the kind of solvent, or, frequency of use. If pressure in the
system is not held or an abnormality is shown, please contact us.
NOTE 2
Since the pressure detection circuit which is constructed in the pressure sensor is exposed,
care should be taken to see that no liquid touch it. If the aspirator is shutdown without
leaking the vacuum, it may cause a back-flow and sensor parts may be damaged by water
from the aspirator's bath.