Humboldt H-1474 User Manual

H-1451, H-1452, H-1474

H-1451_52_74_man_06.09

product manual

Centrifugal Extractor

Product Description

The Asphalt Centrifuge Extractor is designed for use in the separation of asphaltic

mixtures to determine bitumen percentage. Models H-1451 & H-1474 series deluxe
Asphalt Centrifuge Extractor available in either 1,500 or 3,000 grams capacity are
designed to conform to explosion-proof standards for the safety of operating per­sonnel.

The bowl is variable from 0-3,600 rpm and the extractor is provided with a brake

control for fast stopping. The aluminum bowl assembly is removable. A cup built
into the housing cover allows easy pouring of the solvent into the bowl. The unit is
supplied complete with 25 filter discs. Replacement filter discs are available from
Humboldt Mfg. Company.

Instructions refer specifically to 1,500 grams, motor driven extractor. In general, they

will also apply to the 3,000 grams model H-1474. Proportionally larger samples and
volume of solvent are used with the 3,000 grams bowl.

The machines are designed and built to provide many years of satisfactory services when

properly used. Closely follow operating instructions to assure accurate test results
and to avoid damage to the machines.

Related User Documentation

These operating instructions do not contain all the necessary information on the specific

test procedures. Please refer to ASTM D-2172 or AASHTO T-164 for additional test­ing information.

Operation

1. Release clamps and remove upper housing cover (#10, Fig. 1 or 2).

2. Lift bowl assembly from spindle. Remove knurled nut (#5) and lid (#4).

3. Place approximately 1/3 of the extractor capacity of the bituminous sample
in the bowl.

NOTE: To shorten the testing procedure time, pre-warm the sample to a soft

consistency before placing in the bowl. Do not heat the bowl. Do not overheat
the sample.

4. Distribute the sample evenly around the bowl taking care not to crush any
individual particles. If sample is preheated allow it to cool before proceeding to
the next step.

5. Weigh bowl and sample. Record weight.

6. Assure the bowl lip is clean and place filter disc (#3) on it. Place bowl lid (#4) on
bowl and secure with knurled nut (#5). Turn nut snugly by hand.

Caution: Over tightening may distort the bowl lid.

7. Place the bowl assembly in the extractor with the shaft pin
(#25, Fig. 1; #26, Fig.2) seated in the notch at the bottom of the bowl.

8. Replace the housing cover and secure the clamps.

9. Place a collection beaker under the discharge pipe (#11) at the left of the
bowl housing.

10. Pour no more than 450 cubic centimeters of trichloroethylene solvent into the
filter cup of the upper housing cover (#10).

Caution: Provide adequate ventilation when using solvents.
Do not exceed 450 cu. cm of trichloroethylene or flooding will occur causing

damage to the motor and/or bearing and transformer. If sample has been
preheated allow 2 or 3 minutes to digest. If not pre-heated allow 10 to 15 minutes
to digest.

11. Start rotation slowly by turning knob on the speed control box in a clockwise
direction. Increase speed gradually until fine stream of liquid is emitted from the
discharge pipe. Maintain this speed until the discharge stops, and then gradually
increase the speed until no further discharge is obtained.

Caution: A too-rapid rate of acceleration during this step may cause flooding

which in turn can result in an inaccurate test and possible damage to the machine.
Flooding maybe observed by a rapid and excessive discharged followed by
seepage of liquid at the housing cover or the underside of the housing. Correct
this condition by immediately reducing the speed.

12. Return the speed control knob to the zero position in order to apply the brake.

13. Pour in another 450 cu. cm. of solvent and repeat steps 3.11 and 3.12 in the same
sequence. Continue this process until the discharging liquid appears pale amber
in color. The extraction process is then complete.

14. Remove the housing cover and lift out the bowl. After removing the nut and
bowl lid, wash with solvent the under surface of the lid into the beaker.

15. Carefully lift the filter disc from the bowl lip and brush any clinging particles
into the bowl. The filter maybe burned over the sample for complete recovery of
fines making allowances for ash correction.

Precautions

A. Loss of Fines:

4.1 Avoid excessive speed and acceleration especially at the beginning of a test cycle
when a lot of solvent is present.

4.2 Do not over-tighten the bowl nut.

4.3 Use a heavier filter disc or two standard discs.

4.4 Burn the filter over the sample. Make ash correction.

4.5 When test is complete, carefully brush all dust from the bowl lip and underside of
the bowl cover into the sample.

B. Warp age of Bowl and Lid
Make the following check for possible warp age of bowl and lid.

4.6 Put the lid in place (no filter) and hand tighten the bowl nut.

4.7 Try to insert a 0.005” feeler gauge or shim at any point.

4.8 If the gauge passes through, the bowl or cover should be re-faced or replaced.

Specifications

Control Variable speed, 0-3,600 rpm; brake for fast stopping
Motor 1/8 hp
Cover Precision-machined aluminum; removable, with integral

cup for adding solvent.
Housing Cast aluminum; sealed
Bowl Precision-machined aluminum; removable
Capacity H-1451, H-1452: 1,500 gram

H-1474: 3,000 gram
Filter Discs 25 included
Dimensions 12”w x 22”d x 20”h (305mm x 559mm x 508mm)

H-1452: 17”w x 22”d x 20”h (432 x 559 x 508 mm)
Weight H-1451, H-1452: Net 75 lbs. (34 kg.);

Shipping 85 lbs. (38 kg)

H-1474: Net 103 lbs. (47 kg.);

Shipping 140 lbs. (63 kg.)

Warranty

Humboldt Mfg. Co. warrants its products to be free from defects in material or
workmanship. The exclusive remedy for this warranty is Humboldt Mfg. Co.,
factory replacement of any part or parts of such product, for the warranty of this
product please refer to Humboldt Mfg. Co. catalog on Terms and Conditions
of Sale. The purchaser is responsible for the transportation charges. Humboldt
Mfg. Co. shall not be responsible under this warranty if the goods have been
improperly maintained, installed, operated or the goods have been altered or
modified so as to adversely affect the operation, use performance or durability
or so as to change their intended use. The Humboldt Mfg. Co. liability under
the warranty contained in this clause is limited to the repair or replacement of
defective goods and making good, defective workmanship.

Humboldt Mfg. Co.

875 Tollgate Road
Elgin, Illinois 60123 U.S.A.

Testing Equipment for

HUMBOLDT

www.humboldtmfg.com

U.S.A. Toll Free: 1.800.544.7220

Voice: 1.708.456.6300

Fax: [phone]

Email: [e-mail]

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