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LPG Vapor Pressure Testing at its Best

For LPG vapor pressure testing eralytics increased the standard operating range of the ERAVAP to up to 2000 kPa. ERAVAP LPG is fully compliant with ASTM D6897 and covers a temperature range of -20 °C to 120 °C. Additionally, ERAVAP LPG can measure gasoline and crude oil according to the most common standard test methods (ASTM D5191, D6377, D6378, D5188, EN 13016).


Correlation to

  • ASTM D1267
  • ASTM D323
  • ASTM D2533
  • ASTM D4953
  • ASTM D5190
  • ASTM D5482

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Vapor Pressure Testing of LPG

Information on the vapor pressure of LPG is important for the proper choice of storage tanks and shipping vessels. It is mainly measured for safety reasons that the maximum design pressure of storage and handling systems isn’t exceeded under normal operating conditions. The vapor pressure of LPG can also give insights into the initial evaporation under extreme low temperature conditions.

LPG storage tank

Maximum Flexibility with ASTM D6897

ASTM D6897 can be used to measure the vapor pressure of LPG in the temperature range of 37.8 °C to 70 °C. It covers a vapor to liquid ratio of 0.1:1 to 4:1. The maximum vapor pressure is 3500 kPa. However, the precision statement of a repeatability of 7.4 kPa was only determined in the range of 300 kPa to 1463 kPa.

ASTM D6897 is used to specify the LPG vapor pressure according to ASTM D1835. The vapor pressure of butane must not exceed 483 kPa and the one of propane must be below 1434 kPa according to ASTM D1835 measured at 37.8 °C and a vapor to liquid ratio of 0.5:1.

LPG tanker

ERAVAP - Unique Measuring Options

The Vapor Pressure Tester ERAVAP is available in two models. ERAVAP (EV10) for vapor pressure testing of all kinds of liquids up to a max. vapor pressure of 1000 kPa (145 psi) and ERAVAP LPG (EV20) for vapor pressure testing of LPG’s featuring an extended pressure range of up to 2000 kPa (290 psi). To complete your range of applications, eralytics offers a variety of unique measuring options for both ERAVAP models. Get an overview of the unique measuring options of ERAVAP here >>

ERAVAP Modules_Compatibility

LPG Configuration

To cover the extended vapor pressure range needed for LPG vapor pressure testing, ERAVAP LPG is equipped with special solenoid valves that cover a pressure range up to 2000 kPa. This adds enough safety margin and allows to test the vapor pressure of LPG even at elevated temperatures.
ERAVAP LPG covers a pressure range of 0 kPa to 2000 kPa and a temperature range of -20 °C up to 120 °C. V/L ratios down to 0.02:1 and up to 4:1 are possible. ERAVAP LPG offers a repeatability of 0.7 kPa clearly outperforming ASTM D6897.
In addition it is equipped with a quick-fit inlet system which allows to connect pressurized cylinders with ease

ERAVAP with a connected floating piston cylinder for the vapor pressure measurement of live crude oil

Technical Specifications

Available Test Methods
ASTM D5188, D5191, D6377, D6378, D6897, EN13016-1, EN13016-2, EN13016-3 ,IP394, IP409, IP481, JIS K2258-2, SHT 0769, SHT 0794, SN/T 2932, GOST 52340, TVP
freely programmable methods
EPA / CARB / US Military & NATO reference methods, TVP measurement
VP-V/L Speed TestTM – Combined T(V/L) and vapor pressure measurement
Correlation to...
ASTM D323, D1267, D2533, D4953, D5190, D5482
Fuel Specifications
ASTM D910, D1655, D1835, D4814, D6227; EN 228
Temperature Range
0 °C to 120 °C (32 °F to 248 °F) with Peltier technology. No external cooling is required.
-20 °C to 120 °C (-4 °F to 248 °F) with additional low-temperature upgrade (EV01-COOL). External cooling is required.
Extrapolated range: -100 °C to 300 °C (-148 °F to 572 °F)
Temperature Stability
0.01 °C (0.02 °F)
Pressure Range
0 kPa to 2 000kPa (0psi to 290 psi)
Pressure Resolution
0.01 kPa (0.0014 psi)
Vapor / Liquid Ratio
Variable from 0.02/1 to 100/1
Single-, multi-point and curve measurements
Repeatability: r ≤ 0.15 kPa (0.022 psi) measured with EV10 and cyclopentane @ 37.8 °C
Reproducibility: R ≤ 0.50 kPa (0.073 psi)
Available Extension Modules
EV01-COOL: Low temperature module (-20 °C - 120 °C / -4 °F - 248 °F)
EV01-VISC: High viscosity module (Heated inlet and outlet up to 70 °C / 158 °F)
EV01-VPL: Low vapor pressure module (r = 0.1 kPa; pressure resolution = 0.01 kPa)
Optional 10-position autosampler – directly attached

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