MyVap
Several methods use the Gas chromatography technique for determining the composition of liquefied petroleum gas (LPG) after a sample expansion. The LPG vaporization is often source of errors and bias. Obtain a representative vapor sample from a pressurized liquefied gas is challenging and difficult to handling. Many procedures are used in laboratories to quantitatively expand LPG samples from a liquid phase to a homogeneous gas phase prior to analysis. Most of them are off-line methods, not safe for operators and environment, user-sensitive, causing lack of reproducibility and repeatability on analysis results. SRA Instruments developed an automated and user-independent LPG Vaporizer to handle under control the critical step of LPG phase change. The heart of MyVap system is the accurate control of the expansion pressure and temperature in a heated reservoir. The vaporization cycle can be programmed easily by the MyVap. Before injection, the vapor is delivered to the GC at a selected pressure.
The GC is automatically started by the vaporizer with external start event. The system cleaning before and after the expansion is automatically operated by a vacuum pump controlled by a micro-processor and a pressure sensor.
All operations are fully automated through electrovalves and controlled by dedicated Web software. The MyVap is manufactured with high-quality components and stainless steel, includes safe connections and relief valve for safe operation. To provide an homogeneous LPG sample to the Gas Sampling Valve of your GC, just connect your LPG sample cylinder in the MyVap holder, open the liquid purge valve for few seconds and press the green light button on the front panel. The SRA MyVap does the rest for you, safely and start your GC.
Dimensions | 450 (L) x 430 (H) x 300 (D) |
Weight | 15 Kg |
Power supply input | 237 VAC, 50 to 60 Hz |
Power consumption | Max. 6A / 220VAC |
Material | Stainless steel AISI 316 |
Usage | Indoor |
Contacts to GC | External device not ready/Start/GC ready Input |
Valves | Nr 3 eletro-valves |
Internal Vacuum pump | Before vaporization and to clean the cylinder assembly |
Sample | Liquefied Petroleum Gas, C3 and C4 mixtures |
Sample pressure | Less than 50 bar |
Repeatability %RSD | Typically better than 0.5% on C3 and C4 |
Data System | SRA software, stand-alone |
Communication to PC | LAN |
Operative System | Internet explorer rev10, Chrome rev 28 or higher |
Applications | Liquefied Petroleum Gas compositional analysis |
Relief Safety Valve | 10 psi |
Fittings | 1/8” Swagelok for inlet; 1/16” to GC gas sampling valve |
Vap. temp. range | 50°C -200 °C (inlet) and 50-100°C (cylinder) |
Pressure sensor range | 0 - 5 bar |
Mode of operation | Automatic via Software |