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Vapour Pressure Tester

Highest Accuracy – Lowest Limit: Low Volatility Model MINIVAP VPL VisionProduct | Small | MINIVAP VPL Vision While the standard VP model is designed to sustain pressures up to 20 bar, some applications require increased measurement sensitivity for samples with a very low volatility. These applications include e.g. the measurement of Diesel, Oils or Flavors […]

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Highest Accuracy – Lowest Limit: Low Volatility Model MINIVAP VPL VisionProduct | Small | MINIVAP VPL Vision
While the standard VP model is designed to sustain pressures up to 20 bar, some applications require increased measurement sensitivity for samples with a very low volatility. These applications include e.g. the measurement of Diesel, Oils or Flavors & Fragrances. The MINIVAP VPL Vision model is designed for low volatility measurements up to 150 kPa (21.8 psi). It shows a measuring repeatability better than 0.1 kPa for low volatile samples.
Direct / Indirect Determination of the Absolute Vapor Pressure (“VOC-Methods”)
The model MINIVAP VPL Vision was developed to automate the manual ASTM D2879 Standard Test Method for Vapor Pressure by Isoteniscope for low volatile samples, which is used by the chemical industry. The instrument incorporates a direct and an extrapolated “VOC” method for absolute vapor pressure measurement of single- and multi-component samples.
The direct “VOC”-method is a static method for determining the absolute vapor pressure required for safety data sheets. The indirect method additionally allows to extrapolate to extremely low pressures or to temperatures that exceed the instruments temperature range (-100°C to +300°C). Both methods yield results comparable to the static ASTM D2879 Isoteniscope method, but do not require sample evacuation prior to testing. Based on the GRABNER Triple Expansion Method, air/gases are removed automatically from the measurement result and the sample composition is maintained during measurements.
“VOC”-methods are available in both the MINIVAP VPL and the VP Vision analyzer. Because of a better sensitivity for low volatile samples, the precision of the VPL Vision is significantly better in the pressure range of 0.1 to 30 kPa.
Methods included in MINIVAP VP Vision

 

ASTM D6378 Vapor Pressure of Gasoline and Petrochemicals (VPx)
Grabner´s “Triple Expansion Method” with determination of the dissolved air in the sample. No cooling and air Saturation required!
ASTM D5191 DVPE Dry Vapor Pressure Equivalent (w/ EPA and CARB correlation formulas)
Standard “Mini-Method” measured against vacuum and a correlation formula for the calculation of the DVP. Requires sample preparation, including cooling of the sample to 0°C (32°F) and triple air saturation prior to the measurement.
ASTM D6377 Vapor Pressure of Crude Oil (VPCRx)
“Single-Expansion Method” for vapor pressure of Crude Oil developed by GRABNER INSTRUMENTS. Better precision than classical ASTM D323 RVP method, ASTM correlation formula to D323 available. Does not require sample preparation: Saves time, increases precision and eliminates operator bias.
ASTM D6897 Vapor Pressure of LPG up to 2000 kPa
Easy, quick, fully automatic and accurate measurement of liquefied petroleum gas. Replaces the manual bomb method ASTM D1267. ASTM D6897 eliminates manual operation and cleaning and minimizes sample waste. Yields results in excellent correlation with ASTM D1267, but with a highly improved precision.
ASTM D5188 V/L-Ratio (TV/L)
Determines V/L ratio of non-viscous liquids including hydrocarbons like gasoline, solvents and other highly volatile compounds. Instrument performs fully automatically, providing results in minutes. No additional equipment is required.
Fast Mode™ ASTM D5188 & D5191 Fast Mode™ Method
Runs ASTM D5188 and D5191 directly after each other.
EN 13016 – 1 Air Saturated Vapor Pressure
EN 13016 – 2 Absolute Vapor Pressure
IP 394, 409, 481 IP Methods for gasoline and crude oil
JIS K2258-2 Japanese standard method for gasoline
SHT 0769 Chinese standard method for gasoline
SHT 0794 Chinese standard test method for Vapor Pressure of Petroleum Products (Mini Method)
SNT 2932 Determination of Vapor Pressure of Chemicals – Triple Expansion Method
GOST 52340 Russian / CIS standard method for crude oils
“VOC” Methods Direct and Indirect Low Volatility Methods
Static methods for determining the absolute vapor pressure required for safety data sheets. Both methods yield results comparable to the static ASTM D2879 Isoteniscope method, but do not require sample evacuation prior to testing.
TVP True Vapor Pressure TVP of Crude Oils (FW 2.0)
Custom Customized Single and Triple Expansion Methods

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