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Brookfield Yüksek Basınç
Rheometresi
High
Pressure PVS Rheometer
The PVS
is a dynamic coaxial cylinder, controlled shear rate rheometer allowing
quick and easy viscosity measurements under pressure at temperatures where
sample boil-off is a problem.
The PVS can be used to simulate process conditions for small fluid samples
in a laboratory benchtop environment. Applications include chemical
compounds containing volatile materials, oil industry, drilling muds and
fracturing fluids, processed foods, polymers and paints. Any test sample
requiring absolute viscosity measurement under totally enclosed conditions
is a viable candidate.
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Portable site-to-site mobility
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Designed to operate in severe environments
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Quick and easy to operate
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Measures samples at high pressure upt to 1000 psi
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Measures under extreme temperature
conditions: -40°C to +200°C
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Simulation of In-Process conditions
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Down Hole
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Cooking
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Blending
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Reactors
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Robust motor capable of speeds upt to 1000 RPM
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Available with triple annulus geometry for increased
sensitivity when measuring low viscosity fluids
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Quick and easy setup
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Complete with choice of spindle (bob), cup, Rheovision
Software and computer
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Industrial standards
How
It Works
The outer cylinder (sample cup) is driven by a stepper motor at
speeds from 0.05 RPM to 1000 RPM. The inner cylinder (bob) contains
an RTD probe on the surface to provide temperature measurement where
the shear stress is being measured. Several cup and bob designs with
different geometries are available to suit various applications.
The unique torque tube design enables the instrument to respond to
minute changes in viscosity, mechanically transmitting a rotational
torque signal out of the pressure containment area without friction.
Thus all electronics, bearings, and other sensitive components are
completely protected from the influences of both the sample fluid
and its vapor.
System
Includes:
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Rheometer sensing unit and power base
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Over-pressure relief valve
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Choice of 1 cup and spindle (bob) geometry set (B1, B2, B5
cylinders)
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Desktop computer (PC)
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Rheovision® software
Options:
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Heating/Cooling bath, controlled by Rheovision® software
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Lap-top computer
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Extra geometry sets (including high sensitivity triple annulus
geometries)
SPINDLE
SAMPLE
CUP
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VISCOSITY
RANGE
cP (mpa·s)
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SHEAR
RATE
(sec-1)
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SAMPLE
VOLUME
(mL)
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VAPOR
VOLUME
(mL)
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PVS-B1-D
(PVS-B1-D-HC)*
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1.7
- 3.45
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1.703
N
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23
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90
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PVS-B2-D
(PVS-B2-D-HC)*
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18.1
-36.3 MM
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0.377
N
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53
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90
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PVS-B5-D
(PVS-B5-D-HC)*
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4.4
- 8.8 MM
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0.85
N
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40
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90
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PVS-TAB1-D
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0.5
- 1.03 MM
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1.0
N
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140
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200
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PVS-TA5B5-D
(PVS-TAB5B5-HC)*
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0.6
- 1.2 MM
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0.85
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140
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200
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MM =
1,000,000 N = RPM *Optional
Spindle/Sample Cup in Hastelloy C
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