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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:

	Material Code Material Porous Hardware Flange A 316L SS + + + B 316 SS -- + + C 304L SS + + + D 304 SS -- + + E 347 SS + -- -- F 300 Series SS -- + + G 430 SS + -- -- H Nickel 200 + -- -- J Monel® 400 + + + K Inconel® 600 + + + L Hastelloy® C276 + + + M Hastelloy® X + -- -- N Alloy 20 + + + P Carbon Steel -- -- +
	+ Available -- Not Economical
	Material Oxidizing Neutral/ Reducing 316L SS (std) 750° F/400° C 1000° F/540° C Inconel® 600 1100° F/590° C 1500° F/820° C Hastelloy® X 1450° F/790° C 1700° F/930° C

Continuous, clog-resistant filtration.
Mott IGS filters feature a cross-flow design which keeps most particles in the gas stream,greatly reducing obstruction of the filter element. As a result, Mott IGS filters can operate without clogging for great lengths of time, even when used with highly contaminated gas streams.

Fast generation of high-purity samples.
The high precision of Mott porous metal media, coupled with the development of a thin, dynamic membrane of superfine particles on the IGS filter element surface, effectively trap particles of all sizes, resulting in reliable, essentially particle-free gas sampling. Plus, IGS filters are designed with low internal volumes, so they produce fresh gas samples with minimal sample dwell times.

High temperature tolerance.
Depending on the material of construction, Mott IGS filters will withstand temperatures up to 1450°F/790°C in oxidizing atmospheres, and up to 1700°F/930°C in reducing or neutral atmospheres.

High corrosion resistance.
For applications involving corrosive gases, Mott IGS filters can be constructed of special high-strength materials such as Nickel, Hastelloy® and Inconel® alloys.

High pressure tolerance.
Unlike “soft” media, Mott porous metal can be used in high-pressure applications with differential pressures well in excess of 1000 psid.

Fast, efficient, in-situ cleaning.
If excessive particles are allowed to create a denser subsurface membrane on the filter element surface, removal can usually be achieved in seconds with a simple blowback – no shutting down, or removing the filter.

Wide selection of materials.
Mott offers the industry’s widest array of metals and alloys to provide chemical compatibility for virtually any application. Standard construction generally consists of 316L stainless steel, but Mott filters can also be made from a variety of other metals, including Inconel®, Monel®, Alloy 20, and Hastelloy®.

How Mott IGS filters work:

Models Available:

Model 7610 - Filter
Model 7611 - IGS Filter with Eductor
Model 7614 - Flange Mounted External IGS System
Model 7612 - In-Stack IGS System
Series 7600 Custom-designed Pipeline Systems

Design flexibility – By virtue of their design and breadth of choice, Mott IGS filters are well suited to a variety of gas sampling applications. Here are three specific examples based on recent installations, followed by a list of other typical IGS uses.

Application examples –

• Fluid catalytic converters
• Lime kilns
• Utility coal pulverizers
• Open hearth steel furnaces
• Sulfur plant off-gas incinerator stacks
• Boiler flue gas for combustion control and emission monitoring
• Coking oven off-gas atmospheres
• General process control and emission control monitoring