Old No.91, New No.81, Chinnamman Koil Street, Avadi, Chennai - 600054
+91 98848 02547
sales@arvihitech.co.in

Actuators And Isolators

Distributors for Parker and Honeywell

ADVANTAGES OF FIRESTONE AIRSTROKE™ ACTUATORS

Why use an Airstroke actuator (rather than air or hydraulic cylinder) for actuation?

LOW COST

Generally, initial cost is one-half or less than conventional pneumatic or hydraulic cylinders of the same force capabilities. This initial cost advantage is many times greater in the larger sizes.

WIDE SIZE RANGE

Airstroke actuators are available in sizes ranging from 2.2 inches to 37 inches in diameter. The force capability is up to 100,000 pounds. Strokes of up to 14 inches are possible.

DURABLE FOR LONG LIFE

Airstroke actuators are a further application of Firestone’s time proven Airide springs for truck and bus suspensions. The long life and durability necessary for millions of miles
of heavy duty suspension use under adverse environmental conditions are also important factors in machine design.

NO MAINTENANCE OR LUBRICATION REQUIRED
NO INTERNAL ROD OR PISTON

Airstroke actuators have no internal rod, piston, or sliding seals as do conventional cylinders. This allows for the design of Airstroke actuators into applications where dirt or grit would destroy the seals on conventional cylinders.

FRICTION FREE FOR IMMEDIATE RESPONSE

Since Airstroke actuators have no sliding seals, there is no breakaway friction as with conventional cylinders

FLEXIBLE MEDIA

An Airstroke actuator can do its work with either a liquid or gas

ANGULAR CAPABILITY

An Airstroke possesses the unique capability of stroking through an arc without a clevis. Angular motion of up to 30 degrees is possible, along with the design advantage of
generally less complex linkages.

SIDE LOADING CAPABILITY

Airstroke actuators, within certain limits, are not affected by side loads as are conventional cylinders. This misalignment capability eliminates potential rod bending, scoring, and excessive seal wear common to conventional cylinders.

COMPACT STARTING HEIGHT

Airstroke actuators have a low profile compared to conventional cylinders. Our smallest Airstroke actuator (2.2 inch/dia.) collapses to just 1.1 inches in height, while our largest triple convoluted Airstroke (37 inch/dia.) will collapse to a very compact 5.5 inches.

FACTORY SEALED AND TESTED

Most Airstroke actuators feature Firestone’s proven
concept of crimped end plates. The crimped design allows for preshipment testing and quicker installation on equipment.

Imperial catalogMetric catalog

ADVANTAGES OF FIRESTONE
AIRMOUNT™ ISOLATORS

Why use an Airmount isolator rather than a coil spring or other type of isolator?

Why use an Airmount isolator rather than a coil spring or other type of isolator?

UNSURPASSED ISOLATION CAPABILITY

Airmount isolators can provide the highest degree of isolation of any type vibration isolator. System natural frequencies as low as 60 cycles per minute (1 Hertz) are available. The addition of an auxiliary reservoir can provide even lower system frequencies. In order to achieve similar results from a conventional coil spring isolator, a real deflection of 9 inches would be required.

CONSTANT ISOLATION EFFICIENCY

Airmount isolators are unique in that the system’s natural
frequency does not change significantly with changes in load. This unique feature, combined with accurate height control, will allow the use of the same Airmount isolator at each mounting point of an unevenly loaded machine.

ACCURATE HEIGHT CONTROL

Airmount isolators provide accurate height control through
regulation of internal air pressure. This feature eliminates the fatigue and permanent set found in the use of other types of vibration isolators.

WIDE SIZE RANGE

Airmount isolators are capable of isolating loads of 100
pounds per mounting point to over 100,000 pounds per
mounting point.

COMPACT INSTALLED HEIGHT

Airmount isolators can carry the loads and provide the isolation described above at installed heights as low as 2.5 inches. Coil springs providing equal isolation would require a free height of 5 to 25 inches.

EXTENDED EQUIPMENT LIFE

Airmount isolators extend equipment life through their superior isolation capabilities.

EFFECTIVE NOISE REDUCTION

Airmount isolators reduce structurally transmitted noise.
Airmount isolators are also quiet in themselves, since there is no spring chatter as found in conventional coil springs.

VERSATILE

Airmount isolators can be used not only to protect structural members from vibrating machinery, but are also widely used to protect delicate equipment from structurally transmitted vibration

Imperial catalogMetric catalog

Marsh Mellow Isolators

Advantages of Firestone Marsh Mellow™ Springs

Constant Vibration Isolation with Changing Loads

The variable spring rate allows for a nearly constant
natural frequency with changing loads. This results in
consistent vibration isolation with variable loading.

High Load Carrying Capacity

Due to the Marsh Mellow™ spring’s greater deflection
capabilities and load carrying influences of the
fabric reinforcement, it can carry a greater load
when compared to an all rubber part of the same
modulus and dimensions.

Excellent Vibration Isolation

Low natural frequencies provide excellent isolation of
forced frequencies in the range of 800-1200 cycles
per minute (13-20Hz).

Lateral Vibration Isolation

The lateral spring rate of a Marsh Mellow spring
can be less than the vertical spring rate, resulting
in a lower lateral natural frequency. Marsh Mellow
springs provide better vibration isolation in all
degrees of freedom.

Compact Overall Size

The ability to support greater loads and maintain
a cylindrical shape results in a smaller overall size
of the Marsh Mellow spring compared to an all
rubber spring with identical load capacity. This is
important when considering an application with a
small design envelope.

Corrosion Resistant for a Durable, Long Life

Due to its rubber and fabric reinforced construction,
the Marsh Mellow spring has been proven in the
damp and corrosive environments of mines and mills
where a standard coil spring will fail.

Does Not Bottom-Out

Due to the rubber construction, Marsh Mellow springs
do not bottom-out like coil springs. Bottoming-out
under overload or surge load sends a large amount of
stress to all of the machine’s components.

Eliminates Downtime and Potential Damage to Machinery

When a coil spring fails, it will often crack allowing
fragments of the coil to damage equipment. This
problem is eliminated with the rubber construction
of Marsh Mellow springs. Additionally, Marsh
Mellow springs exhibit exceptionally high overload
characteristics and usually do not fail catastrophically,
offering some support even during failure.

Increased Stability at Higher Percentages of Compression

Rubber is an incompressible fluid which will flow to
the path of least resistance. In a Marsh Mellow, as the
height compresses, the fabric reinforced rubber plies
pantograph and the diameter grows. This supports the
rubber core laterally even at 30-40% compression.

Effective Noise Reduction

Marsh Mellow springs reduce structurally transmitted
noise caused by vibration. Marsh Mellow springs
are quiet, unlike steel springs which often suffer
coil chatter and readily transmit high frequency
structural noise.

Low Cost

The Marsh Mellow spring’s high load capability
means fewer springs may be needed in an application,
resulting in less overall cost.

Maintenance Free

Marsh Mellow springs have no moving parts.
No maintenance or lubrication is required.

Imperial catalogMetric catalog