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PRECISION PETROLEUM TESTING INSTRUMENTS

Foaming Characteristics of Lubricating Oils – ASTM D892, D6082

 

Liquid Bath

Model 24 dual foam test bath is the traditional arrangement with two glass jars mounted on a supporting base. Each jar accepts two, 1 liter test cylinders for ASTM D892, Sequences I, II and III testing. One bath is typically controlled at 24°C and the other for 93.5°C with stability of better than ±0.5°C.

Model 28 is similar to Model 24 but upgraded for semi automated operation for increased precision and operator assistance. It is equipped with a two channel automated sequencer, a two channel mass flow controller, and four temperature probes for the measurement of the sample temperatures.

The two channel automated sequencer automatically starts the air flow after the required 5 minutes of gas diffuser stone in the test sample, stops the air flow after 5 minutes, signals the operator to view the foam height, and after 10 minutes again signals the operator to again observe the collapsed foam level. The two channel mass flow controller accurately measures and controls the air flow to the test samples at 94 ml/min ±5 ml/min.

Heated AIR Baths for Foaming Characteristics of Petroleum Products

Heated AIR Baths for Foaming Characteristics of Petroleum Products

Air Bath

Model 323 is a four test position heated AIR bath for measuring the foaming tendencies of lubricating oils in the temperature range of +20 to +150°C. The use of heated air to heat the test samples improves the overall safety by eliminating the use of the potentially unsafe, smoking, dripping of, flammable, hot liquid bath medium. Conventional bath fluids darken and require frequent replacement.

Model 323 uses a digital indicating (0.1°C resolution) PID controller for controlling the air temperature in the chamber, with a stability of better than ±0.5°C over the operating range. Novel, sophisticated heating system and control allows the sample to reach test temperature in less than the 60 minutes specified by the method. Long temperature probes are provided for each of the 4 test positions for digital control and test sample temperature display and precise temperature control during the foaming process.

An automated, two channel sequencer automatically starts the air flow after the 5 minutes soak time, after 5 minutes stops the air flow and sounds an alarm, and again sounds an alarm after the 10 minutes settling period (other times are also available).

A touch screen allows the operator selection and full adjustment of all test parameters. All key test parameters are displayed during the test. Also displayed is the time remaining to the next test event requiring operator attention.

Model 323-H is identical to Model 323 with the exception that its temperature range is only 90°C to 150°C. It is suitable for ASTM D892 Sequence II only, and D6082 test methods.

  • Meet the requirements of ASTM D6082 150°C foaming test
  • Meet the requirements of ASTM D892 for foaming characteristics
  • Operating temperatures from +20° to +150°C
  • Digital indicating PID temperature controller, ±0.5°C stability
  • Rapid sample heat up
  • Refrigerated option for rapid sample cool down
  • Eliminates liquid bath medium for improved safety and cleanliness
  • Two channel mass flow control of air flow
  • Automatic test event sequencer

Liquid Bath Models

Model Number Temperature Range Cabinet Dimensions Ship Weight
12L +24ºC 14x16x26in (35x40x65cm) 130 lbs
12HL +24 or +93.5ºC 17x17x224in (43x43x61cm) 140 lbs
24 +24 or +93.5ºC 33x16x33in (83x40x65cm) 250 lbs
28 +24 or +93.5ºC 42x19x27in (107x48x69cm) 260 lbs
296 +24 to +150ºC 26x19x29in (65x48x73cm) 250 lbs

Air Bath Models

Model Number Temperature Range Cabinet Dimensions Ship Weight
323 +20 to +150ºC 33x25x36in (84x64x91cm) 330 lbs
323-H +90 to +150ºC 33x25x36in (84x64x91cm) 330 lbs
Part Number Description
FM-1 Flat bottomed glass 1000mL graduated test cylinder
FM-3MC Certified Mott metal cylindrical gas diffuser (more uniform air bubbles and greater precision than Norton)
FM-3NC Certified Norton spherical gas diffuser
FM-4 Test assembly includes 1 of each:

  • FM-1 — 1000mL graduated test cylinder
  • FM-3 — Mott metal cylindrical gas diffuser
  • FM-10 — Glass air-outlet tube
  • FM-11 — Air-inlet tube
  • FM-12 — Sealing washer
  • FM-13 — Two hole rubber stopper
FM-5 Four position sample storage rack (cylinders not included)
FM-6 Foam Test Tube Support Rack
FM-7.2 Two channel digital indicating Mass Flow Controller, allowing two simultaneous foam tests
FM-9 Automatic-sequencing controller, automatically starts air flow after the 5 minute period of soaking the diffuser, sounds alarm and automatically stops air flow after 5 minutes blowing period, and sounds alarm after 10 minute settling period. Also provided is a digital display time counter showing remaining seconds to the next even requiring operator attention. Available as a stand alone model or incorporated into any of the foam testing baths.
FM-10 Glass air-outlet tube (90º)
FM-11 Chrome plated air-inlet tube
FM-12 Sealing washer (for between inlet tube and diffuser)
FM-13 Rubber stopper (two holes)
FM-14 Air drying tower package with color indicating drying agent, 3″ diameter by 12″ tall
FM-15 Air supply pump (oil-less diaphragm)
FM-14/15 Air supply assembly mounted on a base with as air supply pump (FM-15) and with an air drying tower (FM-14).

Overall dimensions: 9″x10″x14″

FM-16S Water chiller for foam bath
FM-20 For improved consistency of results, two digital indicating mass flow controllers are used for precisely measuring and controlling the amount of air delivered to the air diffuser. The air flow is controlled at either a rate of 94 or 200 ±mL/min. (depending if the testing by ASTM D892 or D6082, respectively). An automated, two channel sequencer automatically starts the air flow after the 5 minutes soak times, after the 6 minutes stops the air flow and sounds an alarm, and again sounds an alarm after the 10 minutes settling period (other times are also available). A touch screen allows the operator selection and full adjustment of all test parameters. All key parameters are displayed during the test. Also displayed is the time remaining to the next event requiring operator attention.
Part Number Description
FM-21-1B One channel totalizer installed in Model 323 baths
FM-21-2B Two channel totalizer installed in Model 323 baths
FM-21-1 One channel totalizer (free standing)
FM-21-2 Two channel totalizer (free standing)
CFA Fan assembly for quicker cooling of Model 323 baths
FM-1 Flat bottomed glass 1000mL graduated test cylinder
FM-3MC Certified Mott metal cylindrical gas diffuser (more uniform air bubbles and greater precision than Norton)
FM-3NC Certified Norton spherical gas diffuser
FM-4 Test assembly includes 1 of each:

  • FM-1 — 1000mL graduated test cylinder
  • FM-3 — Mott metal cylindrical gas diffuser
  • FM-10 — Glass air-outlet tube
  • FM-11 — Air-inlet tube
  • FM-12 — Sealing washer
  • FM-13 — Two hole rubber stopper
FM-5 Four position sample storage rack (cylinders not included)
FM-10 Glass air-outlet tube (90º)
FM-11 Plated air-inlet tube
FM-12 Sealing washer (for between inlet tube and diffuser)
FM-13 Rubber stopper (two holes)
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-16S Water chiller for foam bath
FM-18D Digital indicating flow rate, certified “U“ tube manometer
FM-18PC PC controlled apparatus (visual first bubble detection)
FM-19PC Automated Diffuser Certification Apparatus
PA-20 20 liters (5gal.) of Polyalphaolefin (PAO) bath medium oil, containing no silicones. PAO fluid has longer life at higher temperatures then conventional bath medium oils. 27 liters (7 gal.) need to fill each liquid bath. Replaces silicones as heated bath medium. Silicone fluids are not recommended. Even low levels (1 ppm and above) of silicone contamination interfere with test results.
FM-7.2 Two channel digital flow control unit, upgrade from rotameter (incl. massflow controllers & LED displays)
FM-9 Automatic controller, upgrade (incl. 2 massflow controllers, touch panel, sequencer, 4 RTD’s)
FM-20 Automatic controller, upgrade, same as FM-9 but specifically to upgrade owners of Lawler Model 24
FM-24 Re-certification of diffuser stone
FM-27 Table for air bath. Feet have sliders
FM-28 Table for air bath with FM-16S chiller. Feet have sliders

The measurement of Foaming Characteristics of Lubricating Oils per ASTM D892 foam testing, and ASTM D6082, High Temperature Foam Testing, is dependent upon the gas diffuser stone used in the test. Certification of the diffuser stone involves the determination of critical parameters including MAXIMUM PORE DIAMETER and PERMEABILITY for either spherical ceramic (Norton stone) or cylindrical metal (Mott) diffusers.

ASTM D892 recommends that the diffusers be tested when new and periodically thereafter, preferably after each use. ASTM D6082 requires the recertification of the diffuser after 10 foam tests.

Model FM-19PC Digital Diffuser Certification Apparatus automatically determines both diffuser PORE DIAMETER and PERMEABILITY in accordance with ASTM E128. However, the manometer is replaced by a high precision digital pressure controller. Furthermore, the traditional analog flow meter is replaced by a digital mass flow meter that directly interacts with the software.

The automated pressure ramping profile generates the Dynamic Bubble Point pressure that is used to determine Pore Diameter of stainless steel and ceramic diffusers. This is calculated by the software program. The steady pressure holding profile generates the permeability of the diffuser in mL/min. Both results are automatically displayed on the computer screen.

The Lawler proprietary Windows software manages the testing operation and all the data. The data can be printed and/or stored on the PC hard drive for ISO 9000 trace ability.

Model 18PC is identical to Model FM-19PC, above, but required visual observation for the appearance of the first bubble.

Model FM-18PC Diffuser Stone Certification Apparatus is a compact unit measuring 11 x 13 x 8 inches.

  • Fully automated and manual apparatus
  • Certifies diffusers used in ASTM D892 and D6082
  • Determine maximum pore diameter and permeability
  • Conform to ASTM E128
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