What is a gas spring | What are they used for | Why use a gas spring | Custom made springs | Technical info | Are
gas springs safe ? | Gas springs
and the environment
WHAT IS A GAS SPRING?
A gas spring; also called
a strut or stay, is a
mechanical device which harnesses the kinetic or elastic energy
of a gaseous element to provide a potential energy source.
In layman’s terms, the simplest form of
gas spring is a cylinder, filled with an inert gas (nitrogen) to
a pre-determined pressure. When a rod is forced into the cylinder
it displaces some of the gas which exerts pressure to push the
rod out again, thus providing a positive force to the rod.
CUTAWAY OF 22 SERIES GAS SPRING
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WHAT ARE
GAS SPRINGS USED FOR?
Gas springs are used in a myriad of industrial
applications where a single directional force is required. The
most common use is in the family car to hold open the bonnet or
boot and to provide control over the opening movement of these
heavy and potentially dangerous apparatus.
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WHY USE A
GAS SPRING?
Whilst any spring (gas or metal) provides a one
directional force when compressed, a gas spring has
the following advantages in the outcome it delivers:
We can produce a spring of any force, stroke and
or length* in small or large quantities with our patented system
of gassing and sealing our springs.
Furthermore, the force rating can be changed as
and when required.
Traditionally, users of gas springs in Australia
have been required to purchase a gas spring that is ex stock
regardless of its suitability for the task at hand. To have a
special spring made for a low volume application was impractical
because of the tooling costs involved; thus users were forced to
use the nearest available option.
At Precision Gas Springs Pty. Ltd. the length, stroke and
force of gas springs are *excessively variable in any
quantity.
*certain
aspects of a gas spring are limited by formulae
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CUSTOM
MADE SPRINGS
As Prototypes are an essential part of
development of a new design or invention, we understand the
importance of prototypes and are geared to assist with the
design, development and manufacture of a prototype, at A
REASONABLE COST! and, within a prompt time frame.
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TECHNICAL
INFORMATION
SIZES AND OPTIONS OF SPRINGS:
| SIZE CODE |
00 |
11 |
22 |
23 |
34 |
45 |
S/Steel |
| ROD/BODY DIAMETER |
6/15 |
8/19 |
10/23 |
12/23 |
16/32 |
20/42 |
10/25 |
| STROKE |
40-150 |
40-400 |
40-800 |
40-1000 |
40-1000 |
40-1500 |
40-800 |
| EXTENDED LENGTH |
2Xstr+22 |
2Xstr+30 |
2Xstr+35 |
2Xstr+50 |
2Xstr+70 |
2Xstr+70 |
2Xstr+35 |
| FORCE n |
50-400 |
50-800 |
50-1200 |
50-1800 |
50-3000 |
50-5200 |
50-1200 |
| FORCE INCREASE |
30% |
30% |
30% |
45% |
40% |
40% |
25% |
| VALVE |
NO |
NO |
NO |
NO |
YES |
YES |
NO |
| HI-TEMP SEALS |
OPTION |
OPTION |
OPTION |
OPTION |
OPTION |
OPTION |
OPTION |
PART NUMBER BREAKDOWN:
| Typical ex-stock spring part # 257-210-0450-11-B0 B0 |
| 257 |
- |
210 |
- |
0450 |
- |
11 |
- |
B0 |
- |
B0 |
| XXX |
- |
XXX |
- |
XXXX |
- |
XX |
- |
XX |
- |
XX |
BODY
LENGTH |
|
STROKE
LENGTH |
|
FORCE
RATING |
|
SIZE
CODE |
|
BODY END
FITTING |
|
SHAFT END
FITTING |
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ARE GAS
SPRINGS SAFE?
Yes gas springs are safe when used in
accordance with instructions! Puncturing high pressure vessels of
any kind is a hazardous practice and must not be done with any
type or make of spring. Similarly, where gas springs are intended
to be used outside normal atmospheric conditions, those
conditions must be specified prior to ordering, so that any
necessary changes or instructions can be arranged. Naturally,
strict guidelines are used in the manufacture of our gas springs
and pressure limits must be adhered to for certain sizes of
spring component parts eg. #11 series (8mm shaft) springs are not
pressurised to greater than 750N force.
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GAS
SPRINGS AND THE ENVIRONMENT
Gas springs are filled with (N2) nitrogen
(industrial dry nitrogen) which comprises up 78%
of the earth’s atmosphere and is a colourless, odourless and
an inert gas. This means that the environment will not be effected
if the gas escapes, is harmless to humans and will not explode or
burn.
Each spring contains a small quantity of oil
(similar to automatic transmission fluid) 3-5ml which maintains
the integrity of the seals within the unit, aids fluid movement
of the unit and provides damping of the final part of the stroke.
Care must be taken in the disposal of
unwanted or used gas springs which are either fully or partially
gassed as they can cause damage if inadvertently punctured,
incinerated or crushed eg. if mixed in with normal rubbish. We
offer a service to properly dispose of and recycle used or
unwanted gas springs.
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Do you need help ? Please feel free
to contact us by email or phone and we will guide you step by step. No matter what technicality or difficulty, we have engineers on hand to help you with and through the process.
Copyright, Aussie Gas Strut Company