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Dm123.book Page 40 Tuesday, February 8, 2005 8:24 AM
Pumped liquids
DME and DMS
List of pumped liquids
The resistance table below is intended as a general
guide for material resistance (at room temperature),
and does not replace testing of the chemicals and pump
materials under specific working conditions.
The data shown are based upon information from
various sources available, but many factors (purity,
temperature, abrasive particles, etc.) may affect the
chemical resistance of a given material. Note: Some of
the liquids in this table may be toxic, corrosive or
hazardous.
Please be careful when handling these liquids.
Pumped liquid 20°C
Concentration
%
Materials
Pump housing Gasket Ball
PP
PVDF
316 SS
PVC
FKM
EPDM
CSM
PTFE
Centellen C
Ceramic
Glass
Acetic acid CH
3
COOH
25 zzzz – zzzzz
60 zzzz – – zz z
85 zzz ––––zz z
Aluminium chloride AlCl
3
40 zz – zzzzzzzz
Aluminium sulphate Al
2
(SO
4
)
3
60 zzzzzzzzzzz
Ammonia, aqueous NH
4
OH 28 zzzz – zzzz–
Calcium hydroxide
7
Ca(OH)
2
zzzzzzzzzz –
Calcium hypochlorite Ca(OCl)
2
20 z – zzzzzzzz
Chromic acid
5
H
2
CrO
4
10 zzzzzzzzzzz
30 – z – zzzzzz
40 – z – zz – zzzz
50 – z – zz – zzzz
Copper sulphate CuSO
4
30 zzzzzzzzzzz
Ferric chloride
3
FeCl
3
100 zz – zzzzzzzz
Ferric sulphate
3
Fe
2
(SO
4
)
3
100 zzzzzzzzzzz
Ferrous chloride FeCl
2
100 zz – zzzzzzzz
Ferrous sulphate FeSO
4
50 zzzzzzzzzzz
Hydrochloric acid HCl
< 25 zz – zzzzzzz
25-37 zz – z – z – zz z
Hydrogen peroxide H
2
O
2
30 zzzzzzzzz
Nitric acid HNO
3
10 zzzzzzzzzzz
30 zzzzzzzz – zz
40 zzzzz – z – zz
70 – zz – z ––z – zz
Peracetic acid CH
3
COOOH 5 z – z – zzzzz
Potassium hydroxide KOH 50 z – zz– zzzz –
Potassium permanganate KMnO
4
10 zzzz – zzzzzz
Sodium chlorate NaClO
3
30 zzzzzzz zz
Sodium chloride NaCl 30 zz – zzzzzzzz
Sodium chlorite NaClO
2
20 z ––zzzzzzz
Sodium hydroxide NaOH
20 zz zz zzz –
30 z – zzzzzz –
50 z – zzzzzz –
Sodium hypochlorite NaOCl 20 z – zzzzzzzz
Sodium sulphide Na
2
S30zzzzzzzzzz –
Sodium sulphite
6
Na
2
SO
3
20 zzzzzzzzzz –
Sulphurous acid H
2
SO
3
6 zzzzzzzzzz
Sulphuric acid
4
H
2
SO
4
< 80 zz – zz zz
80-98 z ––z ––zzz –
z Suitable.
3
Risk of crystallisation.
Limited.
4
Reacts violently with water and generates much heat. (Pump should be absolutely dry before dosing sulphuric acid.)
– Not suitable.
5
Must be fluoride-free when glass balls are used.
6
In neutral solutions.
7
Saturated solution 0.1%.