ISTEC CORPORATION
Flow Measurement & Control
5 Park Lake Road, Unit 6
Sparta, NJ 07871 USA
Tel 973-383-9888
Fax 973-383-9088
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We will be closed on May 24th and May 27th, 2019 in observation of Memorial Day.
We will open again on Tuesday May 28th, 2019
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Oil Meter Pressure Drop Curves
| VISCOSITY INFORMATION | ||
| Kinematic Viscosity | Stokes, Centi-Stokes, mm2/s | St, cSt, mm2/s |
| Dynamic Viscosity | Pascal Seconds, Millipascal Seconds | Pas, mPa.s |
| Poise, Centipoise (outmoded) | P, cP | |
| Conversion | cSt Density = mPa.s | |
| Engler Degrees ° E to mPa.s: only use conversion table | ||
| Saybolt Units to mPa.s: only use conversion table | ||
| Redwood Units to mPa.s: only use conversion table | ||
| Rule-of-thumb | 1cSt ➝ 1mm2/s ➝ 1 mPa.s |
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Mineral oil, viscosity 450 mPa.s VZO 25 mounted on pressure side of pumps ❶ Viscosity curves DN 25 select closest curve F = 500 mPa.s ❷Assume max. permissible pressure drop = 1 bar ❸ The intersection of curve F with the line corresponding to 1bar gives a flow rate of 2000 l/h. |
| VISCOSITY DIAGRAMS | A=5 mPa.s | C=100 mPa.s | E=500 mPa.s |
| B =50 mPa.s | D=200 mPa.s | ||
| For a pressure drop of more than 1 bar, it is recommended to use the next larger meter size. Maximum permissible pressure drop = 3 bar |
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