The Gold Series® offers an optional integrated safety monitoring filter (iSMF) with ASHRAE-grade Riga-Flo® or HEPA grade filters. This after-filter prevents collected dust from re-entering the workspace if there should be a leak in the primary Gold Cone filters. Sparks or debris always has potential for being pulled into the collector during operation. The iSMF is monitored for changes in differential pressure and can be programmed to signal an alarm or shut the dust collector down, if necessary.

The iSMF is also an acceptable device to Camfil Farr for protecting the exhaust of our Gold Series dust collectors to not recirculate flames into a workspace in the event of an explosion in the dust collector. In other words, with the iSMF in a Gold Series you can recirculate the exhaust air back into the work space on explosive applications in most cases without an additional explosion protection valve on recirculation pipe. The iSMF keeps all the potential fuel inside the strong Gold Series cabinet.

• Conveniently installed from the factory on top of the standard Gold Series dust collector.
• Allows access to the HEPA or Riga-Flo® filters via the same platform used to access the primary filters.
• Reduces installation costs as there is no additional remote mounted system to be installed that typically requires additional consideration to access the filters when they are required to be changed.
• Allows the total footprint of the dust collection system to be reduced, thus saving valuable manufacturing floor space.
• Each module incorporates two Camfil Farr filters. Filters are easily clamped into position using the using the same style locking mechanism as those used on the primary filters. Filters are included, but not factory installed.
• The HEPA grade filters have a minimum DOP efficiency of 99.97% on 0.3 micron and are capable of handling 2650 cfm, (4248 cmh), of air per filter.
• The Riga-Flo filters have a 95% ASHRA efficiency and are rated for 2650 cfm, (4248 cmh), per filter.
• Incorporates a Magnahelic gauge for easy monitoring of differential pressures across the final filters.
• Allows the filters to be located prior to fan, thus keeping them under negative pressure.
• Camfil Farr APC also allows this option to be used as a flame arrestor for combustible dust on recirculating the air back into the work space in most cases.

Camfil Farr claims that this system prevents the progression of the flame front as required in NFPA Performance-based provisions and the NFPA 654 and 101 Life Safety Objectives related to a dust collector deflagration and explosion. This represents one solution of several life safety objectives of which all should be met. The authority having jurisdiction (AHJ) is responsible for reviewing the hazard analysis performed for this installation and determining if the integral SMF is suitable for this application.

Camfil Farr APC offers a technical report, titled Integrated Safety Monitoring Filter (iSMF) Qualified as a Flame Front Arrestor, which describes the passive isolation allowed as prescribed in Chapter 12 of NFPA 69. It also details the test procedure and results of subjecting the Gold Series with iSMF to multiple, controlled and measured internal explosions. This technical report is available upon request.

Note: This product option does not apply to EU ATEX rules.