ASTM D6655-01
(Terminology)Standard Terminology Relating to Mechanical Pump Dispensers
Standard Terminology Relating to Mechanical Pump Dispensers
SCOPE
1.1 The terms found in this terminology relate to the nomenclature used in the packaging industry.
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.
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Designation:D6655–01
Standard Terminology Relating to
Mechanical Pump Dispensers
This standard is issued under the fixed designation D 6655; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope mechanical break-up unit (MBU), n—a design structure
found in the insert that forces product to flow in a swirling
1.1 The terms found in this terminology relate to the
method for producing specific spray characteristics.
nomenclature used in the packaging industry.
mechanical pump dispenser, n—a small, finger- or hand-
1.2 This standard does not purport to address all of the
actuated, mechanical device used to dispense (spray, stream,
safety concerns, if any, associated with its use. It is the
or flow) product from a container that may be, generally,
responsibility of the user of this standard to establish appro-
held in one’s hand.
priate safety and health practices and determine the applica-
outputperstroke(OPS), n—the amount of product dispensed
bility of regulatory limitations prior to use.
with one complete actuation when measured in terms of
2. Terminology weight (grams) or volume (microliter, milliliters, or cc’s).
priming, v—the initial process of evacuating air from the
accumulative pump, n—a mechanical pump dispenser that
mechanical pump dispenser and replacing it with product so
accumulates internal pressure by means of a valving-system
that the dispensing process may begin.
that maintains a high velocity flow of the product no matter
retention of prime, n—ability of a pump to retain its prime
what the actuation velocity that results in a consistent fine
and dispense a full dose without re-priming after a period of
mist spray.
non-use.
atomization, n—the separation process of liquid into small
spitting, v—dispensing of a low dose of product when both
particles.
product and air are dispensed resulting in the pump gener-
clogging, v—the restriction of normal product flow. Most
ating a distinctive spitting noise.
commonly due to product drying in a product flow passage
spray particles/droplets, n—the spherically-shaped liquid
area of the mechanical break-up system.
objects that are the result of the atomization process created
exit orifice, n—the final passage found in the insert that the
by a dispensing system with the size of these particles or
liquid flows through before exiting the dispensing system
droplets usually expressed in microns.
where the size of the orifice diameter can determine the size
spray pattern, n—pattern, preferably round, dispensed onto a
of the spray particles and spray pattern.
flat surface when this surface is positioned so that it will
fine mist pump, n—a mechanical pump dispenser that atom-
intercept a spray at a 90 degree angle at a specific distance.
izes liquid into a fine mist. An accumulative pump is the
standard sprayer, n—generally, a finger-actuated, higher-
most common type of fine mist pump.
output (greater than 500 mcl) pump that delivers a coarser
force to actuate (FTA), n—the peak force that corresponds to
spray than a fine mist sprayer.
the pressure on the finger that a consumer feels upon fully
streaming, v—dispensing of a product in the form of a jet or
actuating the mechanical pump dispenser.
a stream.
functional compatibility, n—effect of physical or chemical
stroke length, n—the total distance of travel for the mechani-
interaction between a consumer product and a specific pump
cal pump dispenser from where the mechanism of a pump
mechanism where problems typically include deformation
sits at rest to w
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