Zinc and Ash-Free, Detergent Hydraulic Oils Zinc- and ash-free hydraulic oils have steadily gained popularity over the last few years. In many cases the use of a zinc-free hydraulic oil is a must, especially in machine tools where hydraulic oils can contaminate other functional fluids. RENOLIN ZAF D hydraulic oils are zinc- and ash-free hydraulic oils with good detergent properties. The detergent agents in these oils reduce the formation of residues and ageing by-products. They are HM hydraulic oils in line with ISO 6743-4 but with additional detergent and dispersant characteristics.
The most important features of RENOLIN ZAF D hydraulic oils are:
Good oxidation stability and good resistance to ageing
Powerful EP properties and very good wear protection
Excellent corrosion protection
Rapid air release and low foaming
Good sludge transportation and cleaning properties
Good compatibility with sealing materials
Application:
RENOLIN ZAF D products are high-grade HM hydraulic oils in line with ISO 6743-4 which can be used in all hydraulic systems but also as CKC lubricating oils in line with ISO 6743-6. RENOLIN ZAF D products contain additives which avoid the formation of residues and guarantee the functional reliability of machinery.
OLIN ZAF
32 D
46 D
68 D
Hydraulic oil type
acc. to ISO 6743-4
HM 32
HM 46
HM 68
acc. to DIN 51 502
HLPD 32
HLPD 46
HLPD 68
Lubricating oil type
acc. to ISO 6743-6
CKC 32
CKC 46
CKC 68
acc. to DIN 51 502
CLP 32
CLP 46
CLP 68
Characteristics
Unit
Test method
Colour
1
1
1
ASTM D 1500
Kinematic viscosity
at 40 °C
mm2/s
32
46
68
ASTM D 445
at 100 °C
mm2/s
5.4
6.9
8.6
ASTM D 445
Viscosity index
100
105
97
ASTM D 2270
Density at 15 °C
kg/l
0.878
0.882
0.884
ASTM D 1298
Flash point, Cleveland open cup
°C
210
230
230
ASTM D 92
Pour point
°C
-33
-27
-24
ASTM D 97
Neutralization number
mg KOH/g
0.35
0.35
0.35
ASTM D 974
Saponification number
mg KOH/g
1.1
1.1
1.1
ASTM D 94
Air release at 50 °C
min
3
4
7
ASTM D 3427
Foaming,
seq. I
ml
30/0
50/0
50/0
ASTM D 892 seq. I-III
seq. II
ml
20/0
20/0
20/0
ASTM D 892 seq. I-III
seq. III
ml
20/0
20/0
20/0
ASTM D 892 seq. I-III
Copper corrosion
degree of corr.
1a-100A3
1a-100A3
1a-100A3
ASTM D 130
Rust prevention
pass A
pass A
pass A
ASTM D 665
Ageing behaviour, increase in neutralization number after 1000 h
mg KOH/g
< 2
< 2
< 2
ASTM D 943
Brugger boundary friction test
N/mm2
38
38
38
DIN 51 347 (D)
FZG mechanical gear rig test
load stage
> 12
> 12
> 12
DIN 51 354-2
Vickers vane pump test, loss of mass
on ring
mg
<120
<120
<120
IP 281
on vanes after 250 h
mg
<30
<30
<30
IP 281
Effect on SRE-NBR 1 seal material acc. to DIN 53 538-1 at 100 °C +/– 1 °C after 7 days +/– 2 hours,
