Inertial Gas Sampling Filters
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mott corporation Porous Metal Products Continuous, particle-free gas sampling, even in harsh extremes.

How Mott IGS filters work. Force of inertia carries most particles through and out of the filter, which prevents clogging of the filter element. Gas moves through membrane and porous metal media at low velocity (0.005 fps), causing particles to be removed. Unfiltered gas stream enters IGS filter housing at 70-100 feet per second. Eductor inlet, when necessary, introduces gas downstream of the sample line, creating a vacuum to “pull” gas through the filter at the desired velocity. Superfine particles collect on filter element surface, forming a thin (0.10"- 0.15") permeable membrane....

All-metal strength, plus cross-flow efficiency – the IGS approach to gas filtration. All-metal, inertial gas sampling (IGS) filters from Mott allow the collection of particle-free samples from virtually any gas stream, even those which are very hot or heavily contaminated. And, unlike other gas filters which may quickly plug and need to be thrown away, Mott IGS filters are designed to provide longterm – in many cases, permanent – filtration. Benefits of Mott’s exclusive IGS design include: Continuous, clog-resistant filtration. Mott IGS filters feature a cross-flow design which keeps most...

Types of Mott IGS filters. Model 7610 Filter Assembly. Model 7610 is the basic Mott IGS filter, offered standard with a 0.5µm porous metal filter element, constructed of 100% 316L or 316 stainless steel, or with an Inconel® filter element within a 316 stainless steel housing. Filters with 0.5" ID, 12" or 24"-long filter elements are standard product and are normally in stock. Other sizes and materials are available upon request. Model 7611 Standard External System. The Model 7611 System consists of a Model 7610 IGS filter connected to an inline eductor. By locating the eductor downstream...

Model 7612 In-Stack System. Model 7612 Systems allow placement of the IGS filter inside the stack or pipe, without risk of fouling the filter element, using a compact, self-contained filter/eductor assembly. In-stack systems are often chosen because of external space limitations, or because an external system would drop the gas temperature below its dew point, requiring the addition of heat tracing to prevent condensation. Standard filter element lengths range from 6" to 72", constructed of 316L stainless steel or Inconel® 600. Operating Parameters. Recommended linear velocity in the...

• Standard - 316L SS Mott porous media 316 SS housing. Code AB. Inconel® 600 Mott precision porous media, Hastelloy®X Mott precision porous media, • For other materials consult factory. XX = Standard media grade 0.5, 2 DD = Material code Porous/Housing SAMPLE LINE Computer Sample Flow ABC Part Part Number Liters/Minute Porous Overall Sample Description (CPN) Recommended/Max Length Length Line Dia. Examples: 7610-V2-24-0.5-AB - IGS filter 1/2M ID x 24" porous length, 0.5 micrometer, 316L SS/316 SS. 7610-V2-12-2-MB - IGS filter V2 ID x 12" porous length, 2 micrometer, Hastelloy® X/316 SS.

Model 7611 – IGS Filter with Eductor Specifications I Materials of Construction • Standard – 316L SS porous media, 316 SS housing and connector, 300 SS eductor. Code (AB)F. • Special – Inconel® 600 porous media, 316 SS housing and connector, 300 SS eductor. Code (KB)F. Hastelloy® X porous media, 316 SS housing and connector, 300 SS eductor. Code (MB)F. • For other materials consult factory. All welded construction, compression-type tube connector, no elastomeric seals. Up to 1000 psi at 200° F. Catalog number: 7611-AA-BB-XX-(DD)D AA = Element ID BB = Porous length XX = Media grade 0.5 and 2...

Model 7614 – Flange Mounted External IGS System Specifications I Materials of Construction • Standard – 316L SS porous media, 316 SS housing and connector, 300 SS hardware, 304 SS flange. Code (AB)FD. • Special – Inconel® 600 porous media, 316 SS housing and connector, 300 SS hardware, 304 SS flange. Code (KB)FD. Hastelloy® X porous media, 316 SS housing and connector, 300 SS hardware, 304 SS flange. Code (MB)FD. I All welded construction, compression tube connections. I Up to 1000 psi at 200° F. I Catalog number: 7614-F-AA-BB-XX-(DD)DD F = Flange size 4" or 6" AA = Element ID BB = Porous...

Model 7612 – In-Stack IGS System Specifications I Materials of Construction • Standard – 316L SS porous media, 316 SS housing and connector, 300 SS hardware, 304 SS flange. Code (AB)FD. • Special – Inconel® 600 porous media, 316 SS housing and connector, 300 SS hardware, 304 SS flange. Code (KB)FD. Hastelloy® X porous media, 316 SS housing and connector, 300 SS hardware, 304 SS flange. Code (MB)FD. All welded construction. Up to 1000 psi at 200° F. Catalog number: 7612-F-AA-BB-XX-(DD)DD F = Flange size 4" or 6" AA = Element ID BB = Porous length XX = Media grade 0.5, 2 (DD)DD = Material...

Mott IGS System Design Parameters 1. Determine process operating data for gas sampling application. Sample flow rate (liters/min.), gas temperature, gas dew point, characterize solids, solids loading, operating pressure. 2. Select porous length, based on required sample flow rate. (If near maximum, recommend use of next longer model.) 3. Select material based on gas temperature and/ or corrosion requirements. 4. Select IGS model depending on application needs. 5. To establish eductor operating criteria: a) Estimate system run in feet: Model 7611 total run length, plus inlet tube run, plus...

IGS Notes Bypass Filter Arrangement For sampling in positive-pressure systems from large ducts or pipes, such as an FCC catalyst regenerator stack, a model 7610 IGS filter can be used without an eductor. The filter is mounted across an orifice plate that produces a minimum of a 2 psi differential across the filter, which will generate the required axial velocity in the filter. Smooth piping transitions into and out of the filter should be used to prevent solids from settling out. ORIFICE PLATE Clean Gas Sample Flow Control For maximum service life with IGS filters it is recommended that the...