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|Lite Pressure™ Compression Springs
Our Lite Pressure™ Compression Springs offer
the size you need without the added pressure.
This new Lite Pressure™ Series has been developed so
that, for a given length and diameter (outside or inside),
there would exist a series of springs that had lower spring
rates or workable load ratings than what is currently offered
by the existing Lee Spring Standard Series compression springs.
Pressure is described as a force which is exerted over a
surface area. In regards to compression springs, the
pressure exerted as the result of a specific deflection can be
more technically described as force over a flat surface with
a circular perimeter (the Nominal Hole in which the spring
is being used).
The term "Lite Pressure™ " is used to describe a series of
springs designed to be utilized where relatively low forces
are required for a given diameter.
HOW PRESSURE RATING FOR LP SERIES WOULD BE USED:
The pressure rating assigned to each item of the Lite
Pressure™ series is a selection parameter to assist in meeting
qualitative requirements or quantitative requirements.
Each series is offered in a range from 1 to 5 psi pressure
ratings, 1.5 to 5.5 psi or 5 to 15 psi pressure ratings.
LP series springs are ideal for many fluid power applications
such as relief valves, check valves or pistons
Other miscellaneous applications could include motor
brushes, contacts, displays, syringes, toys, dispensers and many more
LP series springs are offered ONLY in Type 316 Stainless
Steel so as to provide a design that can meet requirements
in various diverse applications that call for:
Improved corrosion resistance
Moderately elevated temperatures
RELATIONSHIP TO FLUID PRESSURE:
The pressure ratings used for Lite Pressure™ Series springs
have no direct relationship with "pressure" as traditionally
used in the fluid power industry, although indirectly the
pressure ratings are conceptually equivalent.
Fluid pressure would be the result of a spring force acting
over the specific area exposed to the fluid and would depend
on other application components such as the valve face or the
PRESSURE CALCULATION EXAMPLE:
Catalogue spring LP 014E 05 S316 has the following characteristics:
Nominal Hole: 0.375 inch
Free Length: 1.000 inch
Solid Height: 0.143 inch
Spring Rate: 0.161 lbs/inch
The maximum recommended pressure for this spring will
occur when the spring is at 80% of maximum available deflection (it is not generally recommended to use a
compression spring all the way down to solid height).
The maximum available deflection is the difference
between the Free Length (1.000) and the Solid Height
(0.143) or 1.000 - 0.143 = 0.857 inch.
80% of that would be 0.857 x 80% = 0.686 inch.
The calculated load at this deflection would be the deflection
(0.686) times the Spring Rate (0.161) or 0.686 inch x 0.161 lbs/inch = 0.110 lbs.
The surface area over the Nominal Hole diameter (0.375)
would be pi (pi) times the diameter squared divided by four or pi (pi) x (0.375²) / 4 = 0.110 in².
The resultant pressure would then be determined by dividing
the calculated load by the surface area or
0.110 lbs / 0.110 in² = 1 lb/in² (psi).
Type 316 Stainless Steel
Passivated per ASTM A967
Tolerances on Spring Rate - ± 10%
Tolerances on Outside Diameter (for LP Series only):
0.201" - 0.300" ± 0.008"
0.301" - 0.500" ± 0.010"
0.501" - 0.850" ± 0.020"
0.851" - 1.125" ± 0.025"
1.126" - 1.460" ± 0.030"
1.461" - 1.625" ± 0.040"
1.688" - 1.937" ± 0.055"
1.938" - 2.375" ± 0.070"
2.376" - 2.875" ± 0.090"