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. This process vapor pressure tester fully complies to the industry relevant ASTM standards for gasoline (ASTM D6378), crude oil (D6377) and LPG (D6897).

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.

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
    • NFPA 496 (US)
    • EN 60079-2 and EN 60079-0 (EU)

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

Principle
The sample flows from the sample conditioning system via a quick connector (4) 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.

Standards:

ASTM D323, ASTM D1267, ASTM D4953, ASTM D5191, ASTM D5188, ASTM D6377, ASTM D6378, ASTM D6897