Petroleum Oxidation Stability Tester Bath

Oxidation Stability Test Apparatus

Complete system for testing the oxidation stability of gasoline and aviation fuels. The apparatus provides an indication of the tendency of gasoline and aviation fuels to form gum in storage. The sample is oxidized inside a stainless steel pressure vessel initially charged with oxygen at 100psi (689kPa) and heated in a boiling water bath. The amount of time required for a specified drop in pressure (gasoline) or the amount of gum and precipitate formed after a specific aging period (aviation fuels) is determined.

Key Features

• Conforms to ASTM D525, D873, ISO 7536 and related specifications
• Oxidata® Pressure Measurement System
• Available in two, four or six-unit configurations
• Choice of water/liquid or solid block heating baths
• Oxidation pressure vessel incorporates burst disk assembly

System Components

The complete system consists of Oxidation Pressure Vessel, Pressure Measurement Equipment, Oxidation Bath and Accessories.

K10500 Oxidation Pressure Vessel

Precision machined stainless steel pressure vessel includes threaded body; lid; stem with filler rod and mounting flange; needle valve for purging, pressurizing and exhausting pressure vessel with oxygen; and burst disk assembly. Pressure vessel interior and inside of stem have a high polish to facilitate cleaning and prevent corrosion. Octagonal sections on the pressure vessel and lid permit tight closure with wrench. Includes buna-N gaskets.

Stainless steel burst disk ruptures at 223psi (1537kPa) to prevent unsafe pressure build-up inside pressure vessel. Accessories available rupture disk assembly retrofit for existing pressure vessels. Can also be used as a pressure vessel in ASTM D5304 "Standard Test Method for Assessing Distillate Fuel Storage Stability by Oxygen Overpressure".

Solid Block Oxidation Baths

Solid block baths conforming to ASTM and related specifications. Constant temperature baths for heating K10500 Oxidation Pressure Vessels in accordance with ASTM specifications.

Insulated aluminum block baths available in two or four-unit capacity. Baths feature microprocessor temperature control with built-in overtemperature protection and dual LED displays for setpoint and actual temperature values in °C/°F format. The solid block design offers operating advantages over the boiling water bath, and meets temperature control and other requirements of ASTM and related methods. It should be noted, however, that many applicable specifications for this test method call for a liquid bath medium. Housed in an insulated steel cabinet with chemical-resistant polyurethane enamel finish. Includes lids for pressure vessel ports. Order thermometer separately.

K10491 Solid Block Oxidation Bath Specifications

Solid Block Bath Models

Water/Liquid Oxidation Baths

Water/liquid baths conforming to ASTM and related specifications. Constant temperature baths for heating K10500 Oxidation Pressure Vessels in accordance with ASTM specifications.

Two different models, both equipped with low liquid level controllers in accordance with the latest ASTM specifications. Two-unit water bath can be flush mounted in a table top if desired, and is equipped with an overflow standpipe/drain to maintain the proper depth when the pressure vessels are inserted, and a plated brass reflux condenser to minimize evaporation loss.

The six unit model can be used with water or oil as a bath medium, and has a fully digital touch screen controller that provides quick temperature stabilization without overshoot. The bath is also protected by a redundant overtemperature control circuit that interrupts power should bath temperature exceed a programmed cut-off point. Display provides actual setpoint temperature values in °C/°F format. Both models feature double-wall insulated construction with stainless steel tanks, support racks and port covers. Order thermometer separately.

K64400 2-Position Liquid Oxidation Precision Bath Specifications

Water/Liquid Bath Models

Oxidata® Pressure Measurement Systems

Electronic pressure measurement systems exclusively designed for ASTM oxidation test methods. Complete electronic measurement systems for plotting pressure versus time and temperature in oxidation testing of fuels. Each system includes transducers, USB multiplexer, software, and mounting and connecting hardware. Systems are available in two, three and four pressure vessel configurations, and additional channels can be added for up to a total of twelve pressure and four temperature channels.

Koehler's pressure measurement systems for fuels oxidation testing features Oxidata®, a high accuracy pressure measurement software package designed exclusively for ASTM oxidation test methods. Designed to run in a Windows® environment, Oxidata® monitors up to twelve samples simultaneously, with graphical or tabular display of results. Each channel can be independently configured for any of the applicable ASTM standard test methods without compromising the independence or accuracy of the other channels. Independent start and stop times and user programmable end points add even greater flexibility.

The software plots your data on screen in real time. Multiple display options include the ability to view the status of all twelve pressure channels on screen simultaneously and then click on any one channel for a graph display; or to view four channels in graphical format simultaneously. Powerful program features allow user to zoom in on a specific plot section to view data in greater detail. Color-coded bath identification is built into the software for easy identification of test baths. The software will determine the break point and induction period according to the test method and will save the test data in csv format for further data assessment.

Oxidata® Features

• Powerful Oxidata® software for Windows® environments
• Monitors up to twelve pressure and four temperature channels
• Automatic end-point detection
• Real-time average bath temperature display
• Can be installed to most manufacturer's fuels oxidation test apparatus
• On line, real time monitoring of up to twelve samples simultaneously – results plot directly to the screen for instant monitoring or printout of results
• Automatic detection and reporting of break point and induction period
• Invalid test indication when a pressure leak is detected
• Menu options for fuels oxidation testing and other ASTM oxidation tests
• Programmable automatic end point detection with graphical and tabular representation
• Each channel can be configured and operated independently with different start/stop times and different ASTM test methods
• Zoom in feature allows for magnification of any plot sector on any channel for a more detailed study
• Monitors and reports temperatures of as many as twelve pressure vessels simultaneously using accessory cables, and calculates and displays average temperature for each of up to four baths
• Exports data to spreadsheet programs such as Microsoft Excel®, csv readers, etc.
• Temperature and pressure calibration capability
• Data is saved directly to the disk or hard drive during testing to prevent loss of valuable data
• Operates in Windows® 7 or higher

Included Accessories (for the pressure measurement systems)

• Transducers (connects directly to pressure vessel)
• USB multiplexer box
• Oxidata® software
• Connecting cables and hardware

Computer Requirements

Available Accessories