Vapor Pressure

MiniVap On-Line

Grabner/Reid Vapor Pressure On-Line Analyzer

Compass Instruments represents the MINIVAP On-Line Vapor Pressure product.
Phone: 630.556.4835 | Email: sales@compass-instruments.com

MINIVAP ON-LINE is a process monitoring analyzer for the determination of the vapor pressure of gasoline, crude oil, LPG and NPG. Also, the vapor-liquid ratio (LVR) of gasoline can be measured. The measuring principle is identical to the worldwide used laboratory instruments MINIVAP and therefore the MINIVAP ON-LINE produces equivalent results.

Up to 2 different sample streams can be connected to one single analyzer. The process vapor pressure tester fully complies to the industry relevant ASTM standards for gasoline (ASTM D6378), crude oil (D6377) and LPG (D6897).

The unmatched accuracy makes refineries save thousands of Dollars each day!

Click on the "Calculator" TAB to calculate your savings today!

Applications
MINIVAP ONLINE is fully compliant with all relevant specifications, using the same methodologies as the laboratory analyzers, which are the US EPA reference for highest precision.

With MINIVAP ON-LINE, the vapor pressure of gasoline (D6378 / D5191), crude oil (D6377 / D323), liquid petroleum gas (D6897 / D1267) and the vapor-liquid ratio temperature of gasoline (D5188) can be determined. With possible connection of up to 2 different sample streams, these measurements can be performed with one single instrument.

Specifications +
Grabner/Reid Vapor Pressure On-Line Analyzer

Features
- On-line Compliance Monitoring for Vapor Pressure of Gasoline, LPG and Crude Oil and Vapor/Liquid-Ratio Temperature of Gasoline (V/L=20)
- One Single Instrument for up to 2 Sample Streams
- Multiple Point Measurements at Different Nominal Pressures
- Automatic Calibration & Offset Correction
- Temperature Controlled Sample Conditioning System
- 7 Minutes Cycle Time
- Explosion Proof-Class I
VAPOR PRESSURE TESTER STANDARDS
- ASTM D6378 - Vapor Pressure of Gasoline (VP4)
- ASTM D6377 - Vapor Pressure of Crude Oil
- ASTM D6897 - Latest standard for Vapor Pressure of LPG
- ASTM D5191
- ASTM D5188 - V/L-Ratio: T (V/L = 20)
- ASTM D4953
- ASTM D1267
- ASTM D323
- EN 13016 - 1+2
- IP 394, 409 & 481
- JIS K2258-2, SHT 0769, GOST 52340
Technical Data

Temperature Range

20 to 60°C (68 to 140°F)

Pressure Range

0 to 1000 kPa (0 to 145 psi)

Power Requirements

100/120/230/240 V AC, 50/60 Hz, 65 W

Field Application

12 V/4A DC (vehicle battery)

Physical Dimensions

580 x 1060 x 260 mm (23.7" x 43.3" x 10.6")

Weight

50 kg (110 lb)

Precision Data

MINIVAP 37.8°C @ 70 kPa)

ASTM D323 (Wet Reid Bomb)

Repeatability

±0.3 kPa (0.04 psi)

±3.2 kPa (0.46 psi)

Reproducibility

±0.7 kPa (0.10 psi)

±5.2 kPa (0.75 psi)

Principle
The sample flows from the sample conditioning system via a quick connector (3) and sample inlet valve (4) into the measuring chamber. The automatic sample introduction and volume adjustments are made by a piston with an integrated pressure transducer (1). The measuring chamber (2) with a total volume of 5 mL is rinsed with 2.5 mL and filled with 1 mL. After closing the valve (4), the single or triple expansion to 5 mL (with the sample under vacuum condition) is obtained by further strokes of the piston. The temperature of the measuring cell is controlled with a high-power thermoelectric module (5) and measured with a precision Platinum sensor (6). To achieve fast pressure equilibrium, especially for crude oil, the measuring unit is rocked during the test procedure.

Automatic piston lubrication is processed with every piston stroke.

Continuous product development may make it necessary to change product specifications without notice.

Downloads +

Standards +

ASTM D1267
Standard Test Method for Gage Vapor Pressure of Liquefied Petroleum (LP) Gases (LP-Gas Method)

ASTM D2879
Standard Test Method for Vapor Pressure-Temperature Relationship and Initial Decomposition Temperature of Liquids by Isoteniscope

ASTM D323
Standard Test Method for Vapor Pressure of Petroleum Products (Reid Method)

ASTM D3700
Standard Practice for Obtaining LPG Samples Using a Floating Piston Cylinder

ASTM D4953
Standard Test Method for Vapor Pressure of Gasoline and Gasoline-Oxygenate Blends (Dry Method)

ASTM D5188
Standard Test Method for Vapor-Liquid Ratio Temperature Determination of Fuels (Evacuated Chamber Method)

ASTM D5190
Standard Test Method for Vapor Pressure of Petroleum Products (Automatic Method)

ASTM D5191
Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)

ASTM D5482
Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method—Atmospheric)

ASTM D6377
Standard Test Method for Determination of Vapor Pressure of Crude Oil: VPCRx (Expansion Method)

ASTM D6378
Standard Test Method for Determination of Vapor Pressure (VPX) of Petroleum Products, Hydrocarbons, and Hydrocarbon-Oxygenate Mixtures (Triple Expansion Method)

ASTM D6897
Standard Test Method for Vapor Pressure of Liquefied Petroleum Gases (LPG) (Expansion Method)

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Vapor Pressure

MiniVap On-Line

Specifications +

Downloads +

Application Notes/Case Studies/Documents (11) +

Brochures (6) +

Manuals (2) +

Standards +

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