Test Method: ASTM D4636, D5968, D6594, FTM 791-5307, FTM 791-5308
Corrosiveness and Oxidation Stability of Hydraulic Oils, Aircraft Turbine Engine Lubricants, Diesel Engine Oils, and other Highly Refined Oils
• Liquid Bath with 4 Test Positions
• Temperature Range Ambient to 150°C
• Temperature Stability of ±0.3°C
• Flowmeters Delivering 10L ±1L/Hr of Air
Click for Aluminum Block Dry Baths

Lawler offers a wide range of heated baths for the oxidation of oil products by ASTM D4636, D5968, D6594, and FTM 791-5307/5308 methods. Each test position has a float in tube flowmeter with a precision control valve for the delivering up to 10 ±1 L/hr air to the test sample. Test methods specify flowmeter apparatus as 10 L/Hr but actual flowrates are 5 L/Hr in D4636 Alternate Proc. 2, D5968, and D6594. FTM 791-5308 states 3 L/Hr for spindle oils, 5 L/Hr all other oils. Upon request we can substitute the 10 L/Hr flowmeters with approx. 6 or 8.5 L/Hr flowmeters for increased precision at operating flowrates. A high limit controller is also provided for each unit interrupting power to the heaters in the event of primary controller failure and over heating.

Model 420-4 is a heavily insulated agitated oil bath conforming to ASTM D4636 and related test methods. It is sized to accommodate 4 test positions of the specified glassware. Mounted on the front of the cabinet are 4 flowmeters with precision control valves each delivering 10 ±1 L/hr of air to the test sample.

Temperature range of the bath is ambient to 150°C. A digital controller with 0.1°C resolution provides bath stability of ±0.3°C. 

The bath is provided with a bottom bath drain to facilitate the exchange of the bath medium. A top of bath drain is also provided to contain accidental bath medium overflow. A float prevents operation of the bath with inadequate bath medium.

Model 420-8 is similar to Model 420-4 but with capacity for 8 test positions.
 
We can accommodate requests for alternate numbers of positions. Please inquire.
 
Model 26 removes moisture from pressurized house air and is equipped with an electronic sensor measuring the dew point. The standard procedure of ASTM D4636 test method specifies that dry air with a dew point of -68°C be used for testing.

Model 33 humidifies air to 10 ±1 mg/L of air and is equipped with an electronic sensor measuring water content. Alternative Procedures 1 and 2 of ASTM D4636 test method may specify that humidified air be used for testing.

Either model is available for 115, 208, or 230 volts, 50 or 60 Hz.

Available Models
Model No.
Description
420-4
Heated Liquid Oxidation Bath, 4 positions, 10 L/hr flowmeters
420-8
Heated Liquid Oxidation Bath, 8 positions, 10 L/hr flowmeters

Accessories
Model No.
Description
CO-1
Sample test tube, ea
CO-2
Sample tube head, ea (ASTM D4636, D5968, D6594, FTM791/5307)
CO-3
Air delivery tube, ea to fit CO-2 (ASTM D4636, D5968, D6594, FTM791/5307)
CO-3A
Air delivery tube, ea to fit CO-4A (ASTM D4636 Alt. Proc 2, FTM791/5308)
CO-4
Allinh condenser, ea to fit CO-2 (ASTM D4636, D5968, D6594, FTM791/5307)
CO-4A
Allinh condenser, ea to fit CO-1 (ASTM D4636 Alt. Proc 2, FTM791/5308)
CO-5
Tube for thermocouple (ASTM D5968, D6594, FTM791/5307 only), ea
CO-6-TC-
Sheathed thermocouple (ASTM D5968 & D6594 only), ea. 5 ft cable. Type T below 300 deg C, Type J above 300 deg C (specify with "-T" or "-J" suffix)
CO-6-BW-
Bare wire thermocouple (D5968, D6594, FTM791/5307 only) specify "-T" or "-J" as above
CO-6-RTD
Sheathed RTD (ASTM D4636, D6594 only)
CO-7A
Metal Test Specimens pack (Cu, Pb, Sn, PBz) (D5968, D6594 only)
CO-10
Testing assembly (one each of CO-1, CO-2, CO-3, CO-4, CO-5, CO-6)
CO-13-
Metal Test Specimen, Titanium 8% Mn, ea. (ASTM D4636, FTM791/5307)
CO-14-
Metal Test Specimen, Magnesium AZ31B, ea. (ASTM D4636, FTM791/5307,5308)
CO-15-
Metal Test Specimen, Steel M50, ea. (ASTM D4636, FTM791/5307)
CO-16-
Metal Test Specimen, Steel Grade 1010, ea. (ASTM D4636, FTM791/5307,5308)
CO-17-
Metal Test Specimen, Silicon-iron-bronze, ea. (ASTM D4636, FTM791/5307)
CO-18-
Metal Test Specimen, Silver 99.95, ea. (ASTM D4636, FTM791/5307)
CO-19-
Metal Test Specimen, Aluminum Alloy 2024, ea(ASTM D4636, FTM791/5307,5308)
CO-20-
Metal Test Specimen, Copper Cu, ea. (ASTM D4636, FTM791/5308)
CO-21-
Metal Test Specimen, Cadmium, ea. (ASTM D4636, FTM791/5308) Note: Specify if D4636 metal specimens desired as washer or square shaped. Add appropriate suffix to part number "-W" for washer and "-S" for square
CO-22
Glass spacer to separate the washer style metal specimens, ea
CO-23
Teflon adaptor for sealing air tube to sample tube head, ea (D4636, D5968, D6594, FTM791/5307)
Suggested Additional Accessories:
CO-7
Specimen hangers (ASTM D6594 only), per dozen
CO-8
Sample temperature digital display
CO-9
Centrifuge tube, cone shaped, 100 mL (ASTM D4636, FTM791/5307 only), each
CO-11
Oxidation test tube support rack for 12 tubes
CO-12
Mass flow controller with Windows interface software, each
FM-14
Air drying tower with Dririte desiccant and stand. (Recommended when using house air)
FM-15
Air supply pump & surge tower assembly. (Recommended when using your own desiccant)
FM-14/15
Air supply pump and surge tower (FM-15) with air drying tower (FM-14) assembly.
FM-16
Water chiller for condensers
SCP-24
CAMI grade 240 grit silicon carbide paper (closest to European FEPA P280) (D4636 only)
SCP-40
CAMI grade 400 grit silicon carbide paper (closest to European FEPA P800) (D4636, D5968, D6594)
ALP-24
CAMI grade 240 grit aluminum oxide paper (closest to European FEPA P280) (D5968 and D6594)
ALP-26
Dehumidifier for testing air
ALP-33
Humidifier for testing air per ASTM D4636 Appendix
DAX
Paperless videographic temperature/flow recorder with flash memory card

Specifications subject to change without notice. Lawler Manufacturing Corporation © 2011