GMS-Guardian Membrane Separators

Many sample systems require zero liquid entrainment, and demand the sample not to be altered. A porous PTFE membrane, supported by a sintered stainless steel disc is at the heart of this unit. As a wet sample enters, the membrane only allows gas or vapor molecules to pass through while all liquids are stopped. Our series of membrane filters are uniquely designed to allow the operator quick and easy membrane service while providing high performance filtration. The body contains an integral mounting bracket along with the inlet, outlet, drain, and bypass connections. The threaded cap is user friendly with knurls and flats for optimum infield serviceability. No connections are broken to service the membrane disc.

Our second generation of GMS105 products also features an “Atomizer Plate” which spins the gas flow dropping much of the liquid mass out before contact is even made with the membrane. This rotation assists in keeping the membrane particle free too. We have further reduced the internal volume to minimize the sample lag time.

Features

  • Integral Porting And Mounting Bracket
  • 316L Stainless Steel Standard: NACE MR-01-75 Compliant
  • Up To 70 LPM Flow (2.5 SCFM)
  • 1500 PSIG Maximum Pressure Rating On All Stainless Steel Units
  • PTFE Assemblies Available
  • Oleophobic And Hydrophobic Membranes Available

Applications

  • Protect On-Line Analyzers
  • CNG Sampling Systems
  • Moisture Barrier On Critical Monitoring Probes
  • Sample Conditioning

TECHNICAL INFORMATION ON STANDARD MEMBRANE MODELS
Stainless Steel ModelGMS050GMS100GMS105-1/8”GMS105-1/4”
Replaces ModelSM015.111SM100.221SM105.111SM105.221
Port Size (NPT)1/8”1/4”1/8”1/4”
Drain & Gauge Port (NPT)1/8”1/4”1/8”1/4”
Maximum Pressure (psig)1500150015001500
Maximum Temperature (ºF)300300300300
Internal Volume (cc) In Sample Chamber-Behind Membrane1.503.003.963.96
Weight of Housing (lbs)0.501.502.002.00
Principle Dimensions: (inch)
Center of Port to Back0.280.390.390.39
Body Diameter1.501.972.482.48
Body Depth1.262.051.891.89
Space Required to Remove Cap0.900.900.870.87
Membrane Code (1)MT.19.€€€€€□MT.33.€€□MT.33.□MT.33.□
Materials Of Construction: (2)
Head, Bowl & Internals316LSS316LSS316LSS316LSS
Seals (Standard)VitonVitonVitonViton
Accessories:
Buna-N Seal SetBNGMS050BNGMS100BNGMS105BNGMS105
EPDM Seal SetGEGMS050GEGMS100
GEGMS105GEGMS105
Kalrez Seal SetKZGMS050KZGMS100KZGMS105KZGMS105
Viton Seal Set Standard GVGMS050GVGMS100GVGMS105GVGMS105
Mounting BracketMBGMS050MBGMS100MBGMS105MBGMS105
PTFE Model
N/AN/AGMS105P-1/8”GMS105P-1/4”
Maximum Pressure: 100 PSIG

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Notes:
(1) Replace the “□” with the flow required. i.e. MT.19.M1, MT.33.M2H
(2) Material abbreviations: 316L=316L Stainless Steel

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Guardian Membranes are also offered with integral coalescing pre-filters. A 50C grade element is mounted before the membrane to remove most liquids and solids, thus providing longer membrane life. This integral package minimizes dead volume, panel space, and leak points. The combo units accept the same membrane kits as our standard Guardian units. Part numbers are specified at the bottom of the attached chart.

Our Model GMS170 takes the built-in coalescing filter one step further by inverting the complete assembly and making it easy to service by eliminating the need to break port connections. Here too we reduced internal volume for better conditioning results.

TECHNICAL INFORMATION ON MEMBRANES WITH COALESCING FILTER
Stainless Steel ModelGMS120GMS122GMS170
Replaces ModelSM125.111SM125.221N/A
Port Size (NPT)1/8”"1/4”"1/4”"
Drain & Gauge Port (NPT)1/8”"1/4”"1/4”"
Maximum Pressure (psig)150015002000
Maximum Temperature (ºF)300300300
Internal Volume (cc) In Sample Chamber - Behind Membrane0.1180.11823.8 (Total)*
Weight of Housing (lbs)2.02.01.5
Principle Dimensions: (inch)
Body Diameter1.961.962.13
Overall Length5.035.033.19
Space Required to Coalescing Element3.303.301.61
Coalescing Element12-57-50C12-57-50C22-27-50C
Membrane Code (1)MT.33.€€€€€□/50CMT.33.€€€€€□/50CMT.33.€€€€€□/50C-170
Materials Of Construction: (2)
Head, Bowl & Internals316LSS316LSS316LSS
Seals (Standard)VitonVitonViton
Accessories:
Buna-N Seal SetBNGMS120BNGMS120BNGMS170
EPDM Seal SetGEGMS120GEGMS120GEGMS170
Kalrez Seal SetKZGMS120KZGMS120KZGMS170
Viton Seal Set StandardGVGMS120GVGMS120GVGMS170
Mounting BracketMBGMS120MBGMS120MBGMS170

Notes:
(1) Replace the “€€€€€□” with the flow required. i.e. MT.33.M1H/50C, MT.33.M2/50C
(2) Material abbreviations: 316L=316L Stainless Steel
(*) Internal Volume on the GMS 170: Inlet Side of Element: 3.9; Drain Side of Element: 19.5; Sample Side of Membrane: 0.4
.

A GMS205 / GMS130 series is also offered which mimics the design features of the smaller GMS105 / GMS120 series. These units are meant for systems with higher flow rates (70 LPM) and dirtier streams. The larger membrane and coalescing filter obviously will provide longer service life based upon their physical size. However, these larger units should only be used where the smaller GMS105 series cannot handle the flow.

TECHNICAL INFORMATION ON STANDARD MEMBRANE MODELS
Stainless Steel Housing ModelGMS205-1/4”GMS205-1/2”
Replaces ModelSM205.221SM205.441
Port Size (NPT)1/4”"1/2”"
Drain & Gauge Port (NPT)1/4”"1/2”"
Maximum Pressure (psig)15001500
Maximum Temperature (ºF)300300
Internal Volume (cc) In Sample Chamber – Behind Membrane19.6919.69
Weight of Housing (lbs)7.07.0
Principle Dimensions: (inch)
Center of Port to Back0.600.60
Body Diameter3.943.94
Body Depth (with knob)3.033.03
Space Required to Remove Cap1.301.30
Membrane Code (1)MT.61.€€€€€□MT.61.€€€€€□
Materials Of Construction:
Head, Bowl & Internals316L Stainless Steel316L Stainless Steel
Seals (Standard)VitonViton
Accessories:
Buna-N Seal SetBNGMS205BNGMS205
EPDM Seal SetGEGMS205GEGMS205
Kalrez Seal SetKZGMS205KZGMS205
Viton Seal Set StandardGVGMS205GVGMS205
Mounting BracketMBGMS205MBGMS205
PTFE ModelGMS205P-1/4”GMS205P-1/2”
Maximum Pressure: 100 PSIG

Notes:
(1) Replace the “€€€€€□” with the flow required. i.e. MT.61.M1H, MT.61.M2

TECHINCAL INFORMATION ON MEMBRANES WITH COALESCING FILTER
Stainless Steel ModelGMS130GMS132
Replaces ModelSM225.221SM225.441
Port Size (NPT)1/4”"1/2”"
Drain & Gauge Port (NPT)1/4”"1/2”"
Maximum Pressure (psig)15001500
Maximum Temperature (ºF)300300
Internal Volume (cc) In Sample Chamber – Behind Membrane2.22.2
Weight of Housing (lbs)9.09.0
Principle Dimensions: (inch)
Body Diameter2.952.95
Overall Length6.756.75
Space Required to Coalescing Element3.953.95
Coalescing Element25-64-50C25-64-50C
Membrane Code (1)MT.61.□/50CMT.61.□/50C
Materials Of Construction: (2)
Head, Bowl & Internals316L Stainless Steel316L Stainless Steel
Seals (Standard)VitonViton
Accessories:
Buna-N Seal SetBNGMS130BNGMS130
EPDM Seal SetGEGMS130GEGMS130
Kalrez Seal SetKZGMS130KZGMS130
Viton Seal Set StandardGVGMS130GVGMS130
Mounting BracketN/AN/A

Notes:
(1) Replace the “€€€€€□” with the flow required. i.e. MT.61.M1/50C, MT.61.M2H/50C
.

The porous membranes are produced from pure PTFE; they are extremely inert and have very low absorption levels. There are two standard grades available for use in low to high flow applications. The M1 (0.1 micron) is a low flow type membrane suitable for most liquids and the M2 (0.8 micron) is a high flow type recommended for higher surface tension liquids.

Our Oleophobic membranes designated by the “H” suffix (i.e. MT.33.M2H) have an extra thin layer which repels hydrocarbons and will block both water and hydrocarbons.  They exhibit the same flow characteristics as our standard membranes.

MT.33.M1MT.33.M1HMT.33.M2MT.33.M2H
Membrane TypeLow FlowLow FlowHigh FlowHigh Flow
MaterialPTFEPTFEPTFEPTFE
Diameter (mm)33333333
Thickness (µm)150152150152
Maximum Temperature (ºF)212212212212
Recommended Flow Rate (LPM)0.350.351010
Membrane Micron Size0.10.10.80.8

MT.61.M1MT.61.M1HMT.61.M2MT.61.M2H
Membrane TypeLow FlowLow FlowHigh FlowHigh Flow
MaterialPTFEPTFEPTFEPTFE
Diameter (mm)61616161
Thickness (µm)150152150152
Maximum Temperature (ºF)212212212212
Recommended Flow Rate (LPM)1.01.07070
Membrane Micron Size0.10.10.80.8