The MINIVAP ON-LINE is a process monitoring analyzer that determines the vapor pressure of gasoline, crude oil, LPG, and NPG, and can also measure the gasoline vapor-liquid ratio (LVR). It uses a measuring principle identical to that of the widely used VPV Pro laboratory instruments and produces equivalent results.
This process vapor pressure tester can connect to up to two different sample streams and fully complies with industry-relevant ASTM standards for gasoline (ASTM D6378), crude oil (D6377), and LPG (D6897).
The analyzer's unmatched accuracy allows refineries to save thousands of dollars daily.
Applications
The MINIVAP ON-LINE meets all key specifications and applies the same high-precision methods as US EPA-referenced laboratory analyzers. With a single unit, it can determine the vapor pressure of gasoline (D6378/D5191), crude oil (D6377/D323), and liquid petroleum gas (D6897/D1267), as well as the vapor-liquid ratio temperature of gasoline (D5188). It can be connected to as many as two different sample streams for added efficiency.
Specifications
Grabner/Reid Vapor Pressure On-Line Analyzer
Features
- Online compliance monitoring for vapor pressure of gasoline, LPG, and crude oil, as well as vapor/liquid ratio temperature of gasoline (V/L = 20)
- A single instrument capable of handling up to two sample streams
- Multi-point measurements at a range of nominal pressures
- Automatic calibration and offset correction
- Temperature-controlled sample conditioning system
- 7-minute 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 D6897 - Latest standard for Vapor Pressure of LPG
- ASTM D6377 - Vapor Pressure of Crude Oil
- ASTM D5191
- ASTM D5188 - V/L-Ratio: T (V/L = 20)
- ASTM D1267
- ASTM D4953
- ASTM D323
- EN 13016 - 1+2
- IP 394, 409, 481
- JIS K2258-2, SHT 0769, GOST 52340
Technical Data
Source: Grabner Instruments
| |
|
| 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, 110 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) |
Source: Grabner Instruments
| 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 is introduced into the measuring chamber through the sample conditioning system using a quick connector (4) and sample inlet valve (4). A piston fitted with a built-in pressure transducer automatically adjusts the sample intake and volume (1). The 5 mL measuring chamber (2) is first rinsed with 2.5 mL of the sample and then filled with 1 mL for analysis.
After closing the valve (4), single or triple expansion to the full 5 mL volume, under vacuum conditions, is achieved through additional piston strokes. The measuring cell’s temperature is regulated by a high-power thermoelectric module (5) and monitored by a precision platinum sensor (6). The measuring unit is gently rocked during the test for rapid pressure stabilization. This is particularly useful for crude oil samples.
Automatic piston lubrication is processed with every piston stroke. Image Credit: Grabner Instruments
Image Credit: Grabner Instruments
Videos
Workshop | VP ON-LINE
MINIVAP Online Operation Workshop
Video Credit: Grabner Instruments