Multi-Port Analyzer Housing (120B Series)

The 120B / 122B series of filters are ideal for use with gaseous and liquid sample process analyzers. The small internal volume, compact design, and positive O-ring sealing mechanism make them perfect for demanding analyzer applications. They are constructed entirely of 316L stainless steel and are free of welds to comply with NACE MR-01-75. The 120B series is a versatile sample process filter, which encompasses the standard features of our 120 series housings, but also has a built in support core.

The B4 model has four ports in the head and one in the bowl. The four head ports allow multi-sample streams to be serviced by one filter assembly or the multiple ports may be used for a gauge, vent, and/or drain.

If using a head port as a drain, the B4 should be installed horizontally, or on a slight incline for the liquid to drain properly. When using the head port as a drain, element service is fast and simple since no connections need to be broken. The built in support core provides extra element stability in liquid streams, and superior collapse safety in heavily contaminated gaseous samples. The filter element merely slips over the core and is held in place by the bowl.  An integral mounting bracket is included with the assembly.


  • 316L Stainless Steel Construction
  • One Bowl Port
  • Traditional T-Type
  • Integral Support Core
  • Multi Port Model Available


  • CNG Analyzer Protection
  • Sample Process Filter
  • Duplicates Foot Pattern of 95S6
  • Multi Line Filter
Housing Model120B122B120B4122B4
Port Size (NPT)1/8”"1/4”"1/8”"1/4”"
Drain Type (NPT)1/8”"1/4”"1/8”"1/4”"
Maximum Pressure (psig)5000500050005000
Internal Volume (cc)35353535
Maximum Temp. -Buna-N (250ºF)BN120BBN120BBN120BBN120B
Maximum Temp. -EPDM (300ºF)GE120BGE120BGE120BGE120B
Maximum Temp. -Viton (400ºF) StandardGV120BGV120BGV120BGV120B
Maximum Temp. -Silicone (450ºF)GS120BGS120BGS120BGS120B
Maximum Temp. -Kalrez (600ºF)KZ120BKZ120BKZ120BKZ120B
Weight on Housing (lbs)1111
Principle Dimensions: (inches)
Center Of Port To Head0.390.390.390.39
Head Diameter1.731.731.731.73
Overall Length3.663.663.663.66
Element Removal Clearance2.362.362.362.36
Filter Element Codes: (1)
Disposable Element12-57-□12-57-□12-57-□12-57-□
Stainless Steel ElementSS-12-57-□SS-12-57-□SS-12-57-□SS-12-57-□
PEL ElementPEL-12-57-□PEL-12-57-□PEL-12-57-□PEL-12-57-□
PTFE ElementPT-12-57-□PT-12-57-□PT-12-57-□PT-12-57-□
Materials Of Construction: (2)
Head & Internals316LSS316LSS316LSS316LSS
O-Rings (Standard)VitonVitonVitonViton
Mounting BracketMBSS110MBSS110MB120B4 IncludedMB120B4 Included
WITH GRADE 50C (3) or 70C (4)
Air Line Pressure120B Series

(1) Replace ‘□’ with grade required, e.g. 12-57-50C, PT-12-57-03
(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

Flow Path of Ports:(Multi-Port Housing)
Port 1: Out to In
Port 2: Out to In
Port 3: Out to In
Port 4: In to Out
Port 5: Traditional Drain

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.

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
  • Four Ports Provides Flexibility
  • Small Footprint, Fast Response Time, Multi-Ports
  • Accepts Microfiber, Stainless Steel, PTFE, & PEL Filter Elements