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

 

Concentrate

Brown liquid

Density at 20 °C

g/cm3 0.935 – 0.965

AA_003-9 acc. to DIN 51757/5

Kin. viscosity at 20 °C

mm2/s 150 – 300

AA_003-132 acc. to DIN 51562/1

Emulsion

Milky white

Emulsion (5% in dist. water at 20 °C)

pH value

9.4 – 9.6

AA_003-33 acc. to DIN 51369

Conductivity

μS/cm 400 – 700

AA_003-30 acc. to EN 27888

Factor refraction reading

1.0

AA_003-24

Acid split

1.0

AA_003-31 acc. to DIN 51368

The following parameters have to be checked periodically :

Measurement

Frequency

Limiting values

pH value

daily

9.0 – 9.7

Concentration

daily

Fresh emulsion ± 1 vol. %

Conductivity

weekly

max. 2,500 μS/cm

Copper content (Cu2+)

weekly

max. 2.0 g/l

Saponification number

weekly

min. 50 mg KOH/g

Bacterial count

weekly

max. 104 KbE/ml

 

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

And more…