OXIDATION STABILITY BY ROTATING PRESSURE VESSEL METHOD RPVOT - (ASTM D2272, ASTM D2112)

The Oxidation Stability Tester by Rotating Pressure Vessel Method (RPVOT) is an advanced instrument used to determine the oxidation stability of oils, including engine, turbine, and inhibited mineral insulating oils, under specific controlled conditions. This instrument complies with ASTM D2272 for steam turbine oils and ASTM D2112 for mineral insulating oils. Equipped with a high-quality pressure transmitter, data recording system, and comprehensive software, it measures oxidation stability by rotating an oxygen-pressurized vessel containing the test oil, water, and copper catalyst coil at a constant temperature. The test concludes upon a specified pressure drop, indicating the sample’s oxidation stability.

Applicable Standards:

1. ASTM D2272: Test Method for Oxidation Stability of Steam Turbine Oils
2. ASTM D2112: Standard Test Method for Oxidation Stability of Mineral Insulating Oil
3. Equivalent Indian Standards: IS 1448 P:74 for turbine oils

Instrument Features:

1. Heating Bath:
2. Construction: Double-walled, powder-coated mild steel exterior with stainless steel inner chamber.
3. Insulation: High-grade insulation to prevent heat loss.
4. Temperature Control: Microprocessor-based PID controller with ±0.5°C accuracy; LED display; range from ambient +5°C to 200°C.
5. Stirring Mechanism: Built-in stirrer ensures uniform temperature distribution.
6. Rotation Mechanism: Heavy-duty motor rotates the vessel at 100 ± 5 rpm.
7. Power: 230V, 50Hz, Single-phase AC supply.
8. Rotating Pressure Vessel:
9. Material: Stainless steel for optimal heat transfer and durability.
10. Design: Smooth interior for easy cleaning, equipped with a 6.4 mm needle valve.
11. Capacity: Withstands up to 3450 kPa at 150°C; includes two vessels.
12. Glass Sample Container & Catalyst Coil:
13. Material: Borosilicate glass with a capacity of 175 mL.
14. Additional Accessories: Copper catalyst coil, glass liners with PTFE cover, and ‘O’ ring.
15. Thermometer:
16. IP 37C/ASTM 96C, measuring from 144 to 156°C in 0.2°C increments.
17. Pressure Recording Mechanism:
18. Components: Electronic pressure transducer (1-9 bar range, 0.25% accuracy), HMI touch-screen controller, and data storage software.
19. Operation: Automatic cut-off upon reaching a pressure drop of 25 psi.
20. Data Management: USB storage, Ethernet communication, and comprehensive data acquisition software.

Touch Screen Controller Highlights:

1. Secure data storage and retrieval.
2. High-accuracy PID control loops.
3. USB and Ethernet compatibility for data transfer.
4. Multiple I/O options with a crystal-clear color display.

Optional Accessories (Available at Extra Cost):

1. Oxygen cylinder with regulator.

This Oxidation Stability Tester offers a reliable and automated solution to evaluate the oxidation resistance of oils, ensuring long-term performance of engine and turbine oils in compliance with international testing standards.