Vapor Pressure Analyzer

Petroleum Test and Oil Test Equipment

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vapor pressure analyzer
Automatic Microscale Vapor Pressure Analyzer

Automatic Microscale Vapor Pressure Analyzer

Reid Vapor Pressure Bath

Reid Vapor Pressure Bath

Automatic Microscale Vapor Pressure Analyzer - k24870

The design of the K24870 Microscale Vapor Pressure Analyzer is based on the Triple-Expansion Principal for vapor pressure determination

Automatic Microscale Vapor Pressure Analyzer

The design of the K24870 Microscale Vapor Pressure Analyzer is based on the Triple-Expansion Principal for vapor pressure determination. The sample of known volume is injected into a temperature controlled measuring chamber with a piston in it, which is then sealed. The volume of the sample is expanded by X times in three steps. The total pressure after every expansion step is measured and the dissolved partial pressure of the air and dissolved partial pressure of air in the sample are calculated. The temperature is then raised to a certain value and the total pressure is measured at the temperature. By taking the difference of the total pressure after final expansion and the partial pressure from dissolved air, the vapor pressure of the sample is calculated. 

Test Methods:

ASTM D5191: Determines the total vapor pressure exerted in vacuum by air-containing, volatile, liquid petroleum products, including automotive spark-ignition fuels with or without oxygenates. This test method is suitable for testing samples with boiling points above 0 C (32 F) that exert a vapor pressure between 7 kPa and 130 kPa (1.0 psi and 18.6 psi) at 37.8 C (100 F) at a vapor-to-liquid ratio of 4:1. Measurements are made on liquid sample sizes in the range from 1 mL to 10 mL. No account is made for dissolved water in the sample. 

ASTM D6378: Determines the vapor pressure exerted in vacuum by volatile, liquid petroleum products, hydrocarbons, and hydrocarbon-oxygenate mixtures. This test method is suitable for testing samples with boiling points above 0 C (32 F) that exert a vapor pressure between 7 kPa and 150 kPa (1.0 psi and 21 psi) at 37.8 C (100 F) at a vapor-to-liquid ratio of 4:1. The liquid sample volume size required for analysis is dependent upon the vapor-to-liquid ratio chosen and the measuring chamber volume capacity of the instrument. 

Reid Vapor Pressure Bath

Wireless Reid Vapor Pressure Data Acquisition System Windows®-based electronic pressure measurement software designed for ASTM Reid Vapor Pressure test methods.

Reid Vapor Pressure Bath

Conform to ASTM D323, D1267 and related specifications.One-opening and two-opening types Hydrostatic Test (two-opening type): Withstands 1000psi (6894kPa) gauge hydrostatic pressure per ASTM D1267 specificationsPolished stainless steel test cylinders for vapor pressure tests of liquid petroleum products, volatile crude oil and liquefied petroleum gas (LPG). Consists of upper chamber and lower chamber in required 4:1 volume ratio. O-ring gaskets provide tight seal between chambers and at gauge coupling. One-opening type is for gasoline and other products having a Reid Vapor Pressure below 26psi (180kPa). Two-opening type is for liquid products having a Reid Vapor Pressure above 26psi (ASTM D323) and for LPG (ASTM D1267). Lower chamber of two-opening apparatus includes straight-through ball valve and 1⁄4″ needle valve. For LPG testing, order two-opening type apparatus and accessory bleeder valve assembly. Includes Threaded 1⁄4″ Gauge Coupling and O-ring Seals. 


Wireless Reid Vapor Pressure Data Acquisition System Windows®-based electronic pressure measurement software designed for ASTM Reid Vapor Pressure test methods. Monitors up to eight pressure vessel channels, graphing pressure and RVP data in real-time for each channel. Each channel can be run independently and configured for the pressure ranges of 0-50, 0-200, and 0-1000 psi. Pressure values can be reported in psi or kPa. Software automatically exports results into Microsoft® Excel for data analysis and storage. 


4/6 Unit Reid Vapor Pressure Bath Constant temperature water baths designed for Reid Vapor Pressure determinations of liquid petroleum products and liquefied petroleum gases (LPG). Immerses vapor pressure apparatus at the proper depth per ASTM specifications. Controls bath temperature with ±0.2°F (±0.1°C) precision. Microprocessor PID control provides quick temperature stabilization without overshoot, and the bath is protected by an overtemperature control circuit that interrupts power should bath temperature exceed a programmed cut-off point. Dual LED displays provide actual and setpoint temperature values in °C/°F format. Double-wall construction with fiberglass insulated stainless steel tank. A sturdy 1″ (25mm) flange permits flush-mount benchtop installation for easy access to the bath interior. Built-in holders suspend test cylinders at the required depth. Equipped with overflow stand pipe/drain.


21-Unit Reid Vapor Pressure Bath Constant temperature water bath immerses twenty-one test cylinders for vapor pressure tests on liquid products and liquefied petroleum gas (LPG). Electronic level control automatically maintains the proper immersion depth per ASTM specifications. Heating system employs a 6kW stainless steel heat exchanger with a heavy duty circulating pump to provide rapid heat-up, even heat distribution and ease of servicing. Convenient digital setpoint and display permits rapid selection of any bath liquid temperature within the operating range. A built-in overtemperature limit control protects against accidental overheating. Bath interior and internal components are constructed of heavy gauge stainless steel. Control panel is shielded by a hinged acrylic cover. Includes sturdy angle-iron base with corrosion resistant polyurethane finish. Order pressure gauges and cylinders separately.

 

Test Method:

Vapor pressure is a critical factor in the handling and performance of liquid petroleum and liquefied petroleum gas (LPG) products. The vapor pressure of automotive gasolines is subject to governmental regulation for pollution control purposes.

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