Membrane Filter Housing - Model GMS170

GMS170 Combined Coalescing & Membrane Separator

The Headline Filters GMS170 combines a high-efficiency coalescing filter and a hydrophobic/oleophobic PTFE membrane separator in a single compact housing.

Designed for analyser and sample conditioning systems, the GMS170 provides two stages of protection before the sample reaches the analyser. The integral 50CS coalescing element removes the majority of liquid aerosols and particulate contamination, while the downstream PTFE membrane provides a final barrier against liquid carryover.

This combined design provides reliable analyser protection while reducing the amount of contamination reaching the membrane, helping to extend membrane service life and reduce maintenance.

Two-Stage Sample Protection

Stage 1 – Coalescing Filtration

The incoming gas sample first passes through Headline Filters' high-efficiency 50CS coalescing filter element.

This stage removes fine liquid aerosols, droplets and particulate contamination from the sample before it reaches the membrane.

Stage 2 – Membrane Separation

The conditioned gas then passes across a hydrophobic/oleophobic PTFE membrane.

Gas and vapour pass through the membrane to the analyser, while entrained liquids are prevented from passing into the clean sample outlet.

The result is a conditioned gas sample with a greatly reduced risk of liquid carryover reaching sensitive downstream instrumentation.

Key Features

• Combined coalescing filter and membrane separator
• Integral 50CS high-efficiency coalescing pre-filter
• Hydrophobic/oleophobic PTFE membrane
• Two-stage protection against aerosols, particulates and liquid carryover
• Helps extend membrane life by removing contamination upstream
• Compact, low internal volume design for fast analyser response
• 316L stainless steel construction
• 1/4" NPT process connections
• Maximum working pressure: 150 bar
• Maximum operating temperature: 100°C
• Designed for straightforward in-field servicing
• Internal components can be serviced without disconnecting the process pipework
• Suitable for vertical or horizontal installation
• Replaceable coalescing element and membrane kit

M2 High-Flow PTFE Membrane

The standard GMS170 is supplied with the MT33-M2H high-flow PTFE membrane.

The membrane is chemically inert, has very low absorption characteristics and is designed to allow gas or vapour to pass while preventing entrained liquid from reaching the analyser.

Membrane Type: M2H – High Flow
Material: PTFE
Diameter: 33 mm
Thickness: Approx. 150 µm
Membrane Rating: 0.8 µm
Recommended Flow Rate: Up to 10 L/min
Maximum Temperature: 100°C

Technical Specification

Housing Material: 316L Stainless Steel
Port Size: 1/4" NPT
Maximum Working Pressure: 150 bar
Maximum Operating Temperature: 100°C
Coalescing Element: 22/34-27-50CS
Coalescing Grade: 50CS
Membrane: MT33-M2H
Membrane Material: PTFE
Membrane Rating: 0.8 µm
Recommended Membrane Flow: Up to 10 L/min
Seal Material: Viton®

Typical Applications

• Process gas analyser sample conditioning
• Gas chromatography
• Moisture and dew point analysers
• Hydrocarbon analysers
• Natural gas sample systems
• Refinery and petrochemical analyser systems
• Oil & gas sample conditioning
• Protection against intermittent liquid carryover
• Applications requiring both coalescing filtration and final membrane protection

Proven in Real-World Moisture Analyser Systems

The Headline Filters GMS170 is used within analyser sample conditioning systems where reliable protection against aerosols, particulate contamination and liquid carryover is required.

Shown here is a GMS170 installed within a Michell moisture analyser sampling system during commissioning of a gas processing application.

This type of installation demonstrates how the combined coalescing and membrane design can provide a final protective stage before sensitive moisture analysis instrumentation.

Project/application image courtesy of Danish Nawaz.

Headline Filters is an independent manufacturer and is not affiliated with or endorsed by Michell Instruments or Process Sensing Technologies. Michell and OptiPEAK are trademarks of their respective owners.

Easy Maintenance

The GMS170 has been designed for straightforward servicing in analyser shelters and sample conditioning systems.

The coalescing element and membrane can be accessed without removing the housing from the process pipework, reducing maintenance time and helping minimise analyser downtime.

A complete GMS170 service kit is available containing the replacement 50CS coalescing element, M2H membrane and associated seals and service components.

Need Help Selecting a Membrane Separator?

The GMS170 is particularly suited to applications where the sample contains aerosols, particulate contamination or intermittent liquid carryover and a high level of analyser protection is required.

For help selecting the most suitable Headline Filters membrane separator for your sample conditions, please contact our technical team.

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