BECHEM KUBITRAC 2508 EB
Cold pilgering emulsion
Examples of Application
· Pilger rolling of tubes
Materials
· Copper and copper alloys
Properties
· Good rinsing and wetting properties
· High dirt carrying capacity , produces clean tube surfaces, avoids deposits on tools and pilger mill
· Excellent lubrication results
· High pilgering speeds and extended tool life
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Concentrate |
Brown liquid |
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Density at 20 °C |
g/cm3 | 0.935 – 0.965 |
AA_003-9 acc. to DIN 51757/5 |
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Kin. viscosity at 20 °C |
mm2/s | 150 – 300 |
AA_003-132 acc. to DIN 51562/1 |
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Emulsion |
Milky white |
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Emulsion (5% in dist. water at 20 °C) |
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pH value |
9.4 – 9.6 |
AA_003-33 acc. to DIN 51369 |
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Conductivity |
μS/cm | 400 – 700 |
AA_003-30 acc. to EN 27888 |
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Factor refraction reading |
1.0 |
AA_003-24 |
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Acid split |
1.0 |
AA_003-31 acc. to DIN 51368 |
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The following parameters have to be checked periodically : |
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Measurement |
Frequency |
Limiting values |
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pH value |
daily |
9.0 – 9.7 |
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Concentration |
daily |
Fresh emulsion ± 1 vol. % |
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Conductivity |
weekly |
max. 2,500 μS/cm |
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Copper content (Cu2+) |
weekly |
max. 2.0 g/l |
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Saponification number |
weekly |
min. 50 mg KOH/g |
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Bacterial count |
weekly |
max. 104 KbE/ml |
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Instructions for use
Service concentration :
External lubrication : 7 – 12 %
Internal lubrication (mandrel) as undiluted concentrate or 7 – 25 % emulsion
Prior to fresh preparation, the complete system has to be cleaned and disinfected thoroughly. Subsequently, all pipings are rinsed with 1% emulsion for about two hours. The rinsing emulsion will then be pumped out, and for the fresh preparation, the tank will be filled with water of a total hardness of 90 – 180 ppm CaCO3 (5 – 10°d) and is preheated to 30 °C to 40 °C. The calculated quantity of the concentrate Kubitrac 2508 EB will be slowly added while stirring (circulation pump switched on). The pilger rolling process can be started as soon as the whole emulsion reaches a temperature of 40 °C to 45 °C. To achieve long service life of the emulsion and optimal pilgering results, excellent emulsion maintenance is indispensable. This includes :
· Avoid ingress of salts (chlorides, sulphates) which might cause corrosion and split of the emulsion. Only use demineralised water to top up the emulsion.
· Regular removal of tramp oil (e.g. hydraulic oil) and grease (e.g. bearing lubrication) from the emulsion surface.
· Permanent cleaning of the emulsion (backward movement from the pilger mill) by means of suitable filter systems. Recommended pore size of the filter paper: approx. 40 μm. Stable emulsion temperature by heating/cooling to 40 °C to 45 °C, also during shutdown times (e.g. weekends) to avoid excessive bacterial growth. In case the emulsion is not circulated, care for suitable ventilation by blowing air into the tank (e.g. via lances).
· Storage : to be stored under dry conditions ; protect from freezing. Temperature range +5 °C to +60 °C