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PLM Isolators - Rubber Air Springs

Verified by manufacturer 10 months ago

Fabreeka International

Our Fabreeka® PLM air spring, or pneumatic isolation mounts, are low-frequency vibration and shock isolators to reduce unwanted vibration while leveling the devices they support.

800-322-7352 Website

Application

KEY FEATURES/BENEFITS

  • While pressurized, Fabreeka PLM elastomer air springs will isolate frequencies from as low as 5 Hz
  • When pressurized, PLMs will isolate frequencies above 14 Hz
  • The ratio of vertical to horizontal natural frequency is approximately 1:1 with high horizontal stability


Description

When used as a vibration damper, the internal air chamber ensures significant isolating effects from as low as 5 Hz, as its natural frequency is only 3.0 Hz. PLM air spring elements also isolate while unpressurized. The vertical natural frequency of the elastomer body is around 10 Hz and will therefore isolate interfering frequencies above 14 Hz.

 

The ratio of vertical to horizontal natural frequency with Fabreeka’s elastomer air spring is approximately 1:1 with high horizontal stability. The elastomer wall design in PLM air springs ensures large dynamic spring travel for applications vulnerable to shock and impact. External spacers / stops are advisable to prevent air spring strikethrough where low natural frequency of 3 Hz is still required.

 

The Fabreeka PLM pneumatic elastomeric mounts include a vulcanized threaded inlet for inflating the air springs, using either a Schrader valve or pneumatic screw attachment. No special connections are needed. Air springs with pneumatic screw connectors can be connected to the respective controlled air supply which eases pressurization and leveling.


FAQS

What methods are available for pressurizing and leveling the PLM isolators?

A hand pump or a regulated, compressed air supply can be used for pressurizing and leveling the PLM isolators. See maximum pressure on mount.

 

Can PLM isolators be supplied w/leveling valves for automatic self leveling?

Yes. The tank valve is replaced with a push fitting, and a custom base plate is required to attach the valve.

 

How often do I need to re-pressurize the PLM mounts?

You should not have to re-pressurize these mounts often. However you should periodically (monthly) check the inflated height, as temperature can have an effect on the air pressure.

 

Are metric threads available for the top plate?

Yes. Please contact Fabreeka’s Engineering department at 1-800-322-7352

or info@fabreeka.com to discuss your application.


General information

Literature

Reliable Solutions For Vibration Isolation and Impact Shock Control

Reliable Solutions For Vibration Isolation and Impact Shock Control

Low Frequency Pneumatic Isolation Solutions

Low Frequency Pneumatic Isolation Solutions

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