PVS rotational rheometer
The Brookfield PVS is a coaxial cylinder, controlled shear rate rotational rheometer used in pressurized applications at temperatures where sample boiling presents a problem. The PVS can be used to simulate the processing conditions of small liquid samples in a laboratory bench environment. Applications include chemical compounds containing volatile substances, the oil industry, drilling mud and fracturing fluids, processed foods, polymers, and paints. Any testing sample that requires absolute viscosity measurement under completely enclosed conditions is suitable for measurement with the PVS rotational viscometer.
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Brookfield AMETEK PVS Rotational Rheometer
Operating Principle:
The outer cylinder (sample cup) is driven by a stepper motor at speeds ranging from 0.05 to 1000 rpm. The inner cylinder (bob) contains an RTD probe on its surface, allowing temperature measurement where the shear stress is applied. Various cup and bob geometries are available for different applications.
The unique torque-tube design allows the instrument to respond to small viscosity changes and mechanically, without friction, transmits the rotational torque signal from the pressurized region. This ensures that all electronics, bearings, and sensitive components are fully protected from both the sample liquid and its vapor effects.
Features:
- Robust motor capable of reaching speeds up to 1000 rpm.
- Quick and easy setup in minutes.
- Safety valve rated for 1000 psi (high-pressure), preventing sample evaporation.
- Couette geometry, where the outer cylinder rotates and the bob remains stationary, generating shear rates up to 1700 sec-1.
- RTD thermometer on the inner cylinder ensures accurate sample temperature measurement.
- Measurement compliant with industrial standards.
- Measurements range from vacuum to high-pressure up to 1000 psi.
- Hastelloy C chamber and bob for use in various environments.
- Viscosity measurements at low shear rates (LSRV) down to 0.02 sec-1.
- Sample temperature range: -40°C to +260°C.
PVS Rheometer
| Sample Cup | Viscosity Range (mPa·s) | Shear Rate (sec-1) | Sample Volume (ml)* |
|---|---|---|---|
| PVS-B1-D-HC | 2-5M | 1.7N | 12 |
| PVS-B2-D-HC | 20-36M | 0.38N | 55 |
| PVS-B5-D-HC | 5-10M | 0.85N | 25 |
| PVS-TA5B5-D-HC | 0.5-1M | 0.85N | 160 |
- ± 1 ml
**HC = Hastelloy C, M = 1 million, N = RPM, ml = milliliters
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