Petroleum product vapor pressure tester

Petroleum product vapor pressure testerFeatures:

1. The instrument mainly consists of a water bath, temperature control device, steam pressure bomb, pressure gauge, etc. It is flexible to use and easy to move

2. Stainless steel electric heater and electric stirring device are installed in the water bath, and a bracket for placing test bullets is installed above the bath. Two test bullets can be placed at a time

3. Intelligent temperature control instrument with PID self-tuning function, temperature correction function, high accuracy

4. Equipped with two 0.4 level precision pressure gauges

5. Exquisite design of stainless steel frosted board, simple and beautiful

Petroleum product vapor pressure testerTechnical indicators:

1. Suitable for measuring the vapor pressure of gasoline, and can also be used to determine the saturated vapor pressure of volatile crude oil and other volatile non viscous petroleum products

2. Temperature range: freely set within room temperature to 80 ℃

3. Temperature control accuracy: ± 0.1 ℃

4. Temperature control point: 37.8 ℃

5. Heating power: Control heating of 2KW

6. Mixing motor: 20W

7. Pressure gauge: circular pointer pressure gauge

8. Instrument material: Stainless steel frosted plate

9. Intelligent instrument temperature control based on microprocessor, digital display of temperature, with temperature correction function

10. Power supply: AC220V 50Hz

11. Dimensions: 500 * 350 * 800

12. Weight: 20kg

The petroleum product vapor pressure tester is essentially a precision device that measures the pressure generated by the volatilization of petroleum products under strictly simulated constant temperature (37.8 ° C) and gas-liquid ratio conditions. It is a key analytical instrument in the field of petroleum refining and product quality control, and its measurement data directly affects the performance of the engine, fuel economy, storage and transportation safety, and protection of the atmospheric environment.

Main measurement methods and corresponding instrument types

There are mainly two standard methods corresponding to two mainstream instruments:

1. Red method vapor pressure tester (based on ASTM D323/GB/T 8017)

This is the traditional classic method and the basis for defining the "Reid vapor pressure".

Principle: Inject the cooled sample into the fuel chamber of the vapor pressure tester, and then connect it to an air chamber that has been heated to 37.8 ° C (100 ° F). Immerse the entire device in a constant temperature water bath at 37.8 ° C and oscillate until the pressure reaches equilibrium. At this point, the pressure gauge reading is the Reid vapor pressure.

Key components of the instrument:

Fuel chamber and air chamber: two precision metal chambers.

Constant temperature water bath: precise temperature control at 37.8 ° C ± 0.1 ° C.

Oscillatory mechanism: used to shake the measuring device and accelerate gas-liquid equilibrium.

Pressure measurement system: precision pressure gauge or pressure sensor.

Cooling system: used for sample pretreatment.

Characteristics: Considered as an arbitration method, the results are accurate and reliable, but the operation steps are cumbersome, time-consuming, and rely on manual operation experience.

2. Automatic vapor pressure tester (based on ASTM D5191/GB/T 8017 automatic method)

This is currently the mainstream automated instrument in the laboratory, greatly improving efficiency and reproducibility.

Principle: The core is a testing chamber with an expansion ball. After injecting a small amount of sample, the instrument automatically maintains the test chamber at 37.8 ° C and calculates the vapor pressure through precise volume expansion or pressure measurement. There are various automatic techniques such as expansion method and micro method.

Key components of the instrument:

Constant temperature testing chamber: compact size, precise temperature control.

High precision pressure sensor: directly measures absolute pressure.

Automatic sampling system: can be connected to an automatic sampler for batch analysis.

Built in control system and software: fully automatic control of testing process, data acquisition, calculation, and reporting.

Features:

Quick: A test can be completed in 3-5 minutes.

Small sample size: only 1-2 milliliters are needed.

High degree of automation: reduces human error and has good repeatability.

Safe and environmentally friendly: Fully enclosed testing, almost no volatilization.