Flowserve OR 52-5 - Manual (Page 25)

25
Commissioning Procedure
continued
Oil / Turbidity Curves
A light beam shines through the liquid and any foreign matter which is not dissolved scat-
ters the beam. The scattered light intensity increases in proportion to the concentration
of suspended particles, the degree of turbidity depending on:
size of the particles (degree of emulsification)
shape and composition of the particles
optical properties of the particles
In the case of oils, fats and greases the degree of emulsification is a decisive factor.
Different suspended particles in the fluid
Fuel oil EL, 15°C, coarse emulsification Xylene, 80 °C, fine emulsification
Fuel oil EL, 15°C, fine emulsification Red-berry juice, concentrated
Fuel oil EL, 80°C, fine emulsification Black-berry juice, concentrated
Engine oil (medium), 15 °C,
fine emulsification
Skimmed milk, fat content 0.1% referred
to fat concentration
Vegetable oil, 15°C fine emulsification Turbine oil T68, gear oil M68
Xylene, 20°C, fine emulsification
1
2 3
4
5
6
8
9
10
11
2 4 6 8 10 12 14 16 18 20
Concentration [µl/l] = [ppm]
25
20
15
10
5
7
Indication [ppm]
1 7
2 8
3 9
4 10
5 11
6