7 Servicing/Maintenance
42 of 72
Amarex N
7.2.2 Lubrication and lubricant change
7.2.2.1 Lubricating the mechanical seal
The mechanical seal is supplied with lubricant from the lubricant reservoir.
7.2.2.1.1 Intervals
Change the lubricant every 4000 operating hours but at least once a year.
7.2.2.1.2 Lubricant quality
DANGER
Incorrect lubricant quality
Explosion hazard!
▷
For explosion-proof pump sets always use a lubricant whose ignition
temperature exceeds 185 °C.
The lubricant reservoir is filled at the factory with an environmentally friendly, non-
toxic lubricant of medical quality (unless otherwise specified by the customer).
The following lubricants can be used to lubricate the mechanical seals:
Table 18:
Oil quality
Description
Properties
Paraffin oil or white oil
Alternative: motor oils
of grade SAE 10W to
SAE 20W
Kinematic viscosity at 40 °C
<20 mm²/s
Ignition temperature
>185 °C
Flash point (to Cleveland)
+160 °C
Solidification point (pour point)
-15 °C
Recommended oil quality:
▪
Merkur WOP 40 PB, made by SASOL
▪
Merkur white oil Pharma 40, made by DEA
▪
Thin-bodied paraffin oil No. 7174, made by Merck
▪
Thin-bodied paraffin oil, type Clarex OM, made by HAFA
▪
Equivalent brands of medical quality, non-toxic
▪
Water-glycol mixture
WARNING
Lubricant contaminating fluid handled
Hazard to persons and the environment!
▷
Using machine oil is only permitted if the oil is disposed of properly.
7.2.2.1.3 Lubricant quantity
Table 19:
Lubricant quantity
Motor version
Lubricant quantity
[l]
YL and WL
0.74
UL
0.25
Summary of Contents for Amarex N
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