ASTM D3890-05
(Test Method)Standard Test Method for Number of Strokes to Prime a Mechanical Pump Dispenser
Standard Test Method for Number of Strokes to Prime a Mechanical Pump Dispenser
SIGNIFICANCE AND USE
This test method can be used to visually compare priming characteristics of different pump dispensers and different products.
This test method is suitable for establishing specifications for both the pump dispenser and the final package.
SCOPE
1.1 This test method covers the determination of the number of actuations required to prime a pump dispenser (spray and flow types) with a consumer-type product.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
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Designation:D3890–05
Standard Test Method for
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Number of Strokes to Prime a Mechanical Pump Dispenser
This standard is issued under the fixed designation D3890; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 6. Test Specimens
1.1 This test method covers the determination of the number 6.1 For each test specimen, select a container to which the
of actuations required to prime a pump dispenser (spray and pump dispenser will be attached during the test. Since the dip
flow types) with a consumer-type product. tube length affects the number of strokes to prime, the actual
1.2 This standard does not purport to address all of the bottle of the final package is recommended for testing.
safety concerns, if any, associated with its use. It is the
7. Procedure
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 7.1 Fill each container with the product to be tested at the
actual level of the final package target weight.
bility of regulatory limitations prior to use.
7.2 Attachthepumpdispensersecurelytothecontainer.The
2. Significance and Use
pump should be in the off, locked, or closed position.Take care
2.1 This test method can be used to visually compare not to actuate the pump dispenser during this step.
priming characteristics of different pump dispensers and dif-
NOTE 1—If the actuator is placed onto the pump after the pump has
ferent products.
been secured onto the container, then report this additional stroke in the
2.2 This test method is suitable for establishing specifica-
final results in 8.1.
tions for both the pump dispenser and the final package. NOTE 2—If an actuation is required when opening or unlocking the
pump, then report this additional actuation in the test report discussed in
3. Apparatus
8.1.
3.1 No apparatus is required, although a mechanical device
7.3 If the pump dispenser is equipped with an overcap or
for actuating the pump dispenser may be used.
locking feature, remove or release the feature to permit the
pump dispenser to be in the operable mode.
4. Sampling
7.4 If the pump dispenser has a variable output-per-stroke
4.1 Select an appropriate number of dry, unused pump
feature, make an appropriate adjustment to achieve the desired
dispensers at random for the precision and accuracy desired.A
output-per-stroke at this time. Report this desired dosage in
number of ten test specimens are recommended, but a mini-
8.1.
mum of three is acceptable.
7.5 Actuate the pump dispenser to its fullest extent with
smooth, firm, and even pressure. Allow the pump mechanism
5. Conditioning
to fully return before beginning the next stroke.
5.1 If possible, condition the test specimens at 23 6 3°C (73
NOTE 3—Depending on the venting system, some mechanical pump
6 5.4°F) for not less than 4 h. If the test specimens are not
dispensers can have variation in the number of strokes-to-prime due to the
conditioned at the recommended temperature, this should be
time that the priming vent is opened. It is suggested that a rate of 90 6 15
noted in the test report discussed in 8.1.
strokes per minute be used. For some viscous products, this rate may be
5.2 Test pumps should be tested no sooner than 24 h after
too fast for the mechanical pump dispenser to fully return. If the rate of
assembly when possible. If the pumps are not conditioned at actuation is outside of this range—faster or slower, report in 8.1.
the recommended time, this should be noted in the test report
7.6 Record the number of full strokes until the first full
discussed in 8.1.
discharge of product is observed.
NOTE 4—If the visual determination of the first full stroke is not
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This test method is under the jurisdiction of ASTM Committee D10 on
accurate enough, the amount of product dispensed by the mechanical
Packaging and is the direct responsibility of Subcommittee D10.33 on Mechanical
pump dispenser may be weighed after each stroke, and the amount
Dispensers.
dispensedwouldbedeterminedbysubtractingthepost-strokeweightfrom
Current edition approved Oct. 1, 2005. Published November 2005. Originally
the pre-stroke weight. The strokes-to-prime number to be recorded would
approved in 1980. Last previous edition approved in 2001 as D3890 – 01. DOI:
then be the count value that shows the first consistent weight dispensed.
10.1520/D3890-05.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3890–05
NOTE 5—If the pump does not prime within 25 strokes, t
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