Low Pressure Stainless Steel Housings

Our low-pressure stainless steel housings are ideal for gas analysis, emissions, CEM and sample process filter applications where continual monitoring is required. Although all the stainless steel housings eliminate the monitoring capabilities, they do provide a cost effective filter solution to systems requiring all stainless wetted parts.

The housings have minimal annular volume to reduce lag time and carry over. The 1/4″ drain port in the base, also allows these housings to be utilized as by-pass and slipstream filters.


  • Low Cost Design For Low Pressure Applications
  • All 316L Stainless Steel
  • 1/4” NPT Drain (Standard)
  • Available In Hastelloy, Monel, Etc.


  • Sample Process Filtration
  • Emission / Environmental Service
  • Gas Analysis Protection
  • Low Pressure Service
Housing Model137138147148
Port Size (NPT)1/4”"1/2”"1/4”"1/2”"
Drain Type (NPT)1/4”"1/4”"1/4”"1/4”"
Maximum Pressure (psig)150150150150
Internal Volume (cc)110110250250
Maximum Temp. -Buna-N (250ºF)BN137BN137BN137BN137
Maximum Temp. -EPDM (300ºF)GE137GE137GE137GE137
Maximum Temp. -Viton (400ºF) StandardGV137GV137GV137GV137
Maximum Temp. -Silicone (450ºF)GS137GS137GS137GS137
Maximum Temp. –Encapsulated PTFE (400ºF)GP137GP137GP137GP137
Maximum Temp. -Kalrez (600ºF)KZ137KZ137KZ137KZ137
Weight of Housing (lbs)2.502.503.503.50
Principle Dimensions: (inches)
Center Of Port To Head0.590.590.590.59
Head Diameter2.
Overall Length5.305.309.659.65
Element Removal Clearance2.762.767.287.28
Filter Element Codes: (1)
Disposable Element25-64-□25-64-□25-178-□25-178-□
Stainless Steel ElementSS-25-64-□SS-25-64-□SS-25-178-□SS-25-178-□
PEL ElementPEL-25-64-□PEL-25-64-□PEL-25-178-□PEL-25-178-□
PTFE ElementPT-25-64-□PT-25-64-□PT-25-178-□PT-25-178-□
Materials Of Construction: (2)
Head & Internals316LSS316LSS316LSS316LSS
O-Rings (Standard)VitonVitonVitonViton
Mounting BracketMBSS130MBSS130MBSS130MBSS130
Support CoreSC130SC130SC140SC140
WITH GRADE 50C (3) or 70C (4)
Air Line Pressure137 Series147 Series

(1) Replace ‘□’ with grade required, e.g. 25-64-50C, PT-25-178-03
(2) Material abbreviations, 316LSS = 316L Stainless Steel
(3) Flow rates for Grade 50C rated at 99.99% against 0.01 micron
(4) Flow rates for Grade 70C rated at 95% against 0.01 micron

At the heart of our filter products is the filter element. Choosing the correct element insures proper results for your specific application:

Disposable Microfiber Elements

Disposable Microfiber Elements are most commonly used since they offer exceptional filtration, high flows with minimal pressure drops, and excellent chemical compatibility. These are ideal for use in sample conditioning, instrumentation, CNG, and Emission/Environmental service.

  • For Coalescing (liquid removal) and particle collection use our grade “C”. We recommend starting with the 70C which is rated at 95% efficient at 0.01 micron which provides outstanding filtration, at high flow rates.
  • For Particle removal only use grade “K”. We recommend starting with the 70K which is rated at 95% efficient at 0.01 micron which provides outstanding filtration, at high flow rates.
  • For Particulate removal above 300°F (150°C) use grade “S”.

Stainless Steel 5-Layer Mesh Elements

Stainless steel elements (SS) are designed for the filtration of heavily contaminated gas samples, CNG, and liquid streams since they are recleanable by back flushing or ultrasonic cleaning. Standard microns available: 0.5, 1, 3, 10, 25, 50, 100, and 200.

Sintered PTFE

Sintered PTFE elements are used where only pure PTFE may contact the sample. They should be used in our PTFE series of housings based on the stainless steel models. Model 122P, 122PG, 130P, 130PG, 132P, 132PG, 142P.

Standard microns available: 3,10, and 25.

Sintered Polyethylene (PEL)

Sintered polyethylene elements (PEL) are used only in non-corrosive applications to remove bulk contaminates. Standard micron sizes available: 10, 25, and 75.

  • Sample Conditioning Filter
  • Economical Low Pressure Filter
  • Environmental Analyzer Protection
  • Accepts Microfiber, Stainless Steel, PTFE, & PEL Filter Elements