Porous Gas Spargers


Shown: 0.8" dia x 6" long porous sparger with 1/2" npt Internal thread for gas connection and 1" npt thread for connection to pipeline or tank (Model PMT10S6)


 2 in dia sparger lrr

Shown:  2" x 24" long porous sparger (Model PMMT20S24)


Porous metal sparger

Inyo Process’ line of porous metal seamless injectors create bubbles smaller and more numerous than a drilled pipe or other types of spargers.  With greater gas/liquid contact area, the time and volume required to dissolve gas into liquid is reduced.

The most important factor when injecting gas into liquid is to increase the surface area of the gas to ensure fast absorption into the liquid.  This is accomplished by reducing the bubble size, which creates many slow moving, tiny bubbles that result in a large increase in absorption.

The advantage of the Inyo Process injectors is the tight and consistent pore structure to all of our stainless steel gas injectors.  This consistent pore structure provides a high bubble point which results in tiny, consistent bubbles.

All stainless construction lasts for years.  The durable all –welded construction will remain trouble free for many years.  Often the porous injectors can be easily cleaned using a ultrasonic bath.

  Click on thumbnail for a magnified view of the sintered stainless porous media surface


Inyo Process can provide a variety of styles.  If you need a nonstandard size or special fitting, or specialty metals such as titanium, we are able to provide solutions.


Materials of construction: 316L stainless steel porous media, 316 stainless steel hardware. Filter element 100% leak tested to bubble point.


Sizing Information


Filter area

3/8" Ø element: 1.1 in2 per inch of porous length

1/2" Ø element: 1.57 in2 per inch of porous length

3/4" Ø element: 2.35 in2 per inch of porous length

1" Ø element: 3.14 in2 per inch of porous length


A standard porous sparger configuration (Model PMT10S4 shown).  The internal/external thread combination allows easy installation in pipelines and tanks.



1/2" diameter Porous sparger with 1/4" tubing connectors (Model PMTU5S8T6 shown). Often used for temporary/prototype lab work.


 flanged porous sparger

A 300# flanged diffuser with extension pipe


flanged porous diffuser

 porous injector w blind flange coupling

Flanged sparger with integrated blind flange (can  also be provided with a separate blind flange with threaded coupling to allow for easy cleaning or replacement of sparger)


retractable porous sparger lr 

 retractable porous diffuser closeup

Retractable sparger design allows for removal of the porous sparger while pipeline remains under pressure


sanitary porous diffuser

Sanitary porous sparger with electropolish finish for fluid milk application


Porous Metal Injector & Sparger Sizing

sizing gas injector

This paper describes the sizing of a porous stainless steel sparger or injector.

Download this paper (193 kb)



Standard Porous Sparger Drawings

 threaded porous sparger

Internal / External Threads endfitting

Download PDF below 

male end NPT porous sparger

Male NPT threads endfitting

Download PDF below 

porous sparger with tube plain end

Tube plain endfitting

Download PDF below 

1/2" Diameter Spargers (PMT5 series)

1" Diameter Spargers (PMT10 series)

2" Diameter Spargers (PMET20) up to 10" long

2" Diameter Spargers with support tube (PMMT20) up to 47" long

1-1/2" Diameter Spargers (PME15T) up to 10" long

1-1/2" Diameter with support tube (PMMT15) up to 39" long


1/2" Diameter Spargers (PMTU5)

1" Diameter Spargers (PMTU10)



Pipeline Spargers

 Installing a porous injector in a pipe will always result in greatly reduced bubble size.  The gas will exit from the outside of the porous injector, and the bubbles are immediately sheared by the liquid, resulting in very tiny bubbles and greater absorption.

Download drawing showing pipeline sparger configurations (23 kb)

oxygen injector porous sparger diffuser

Injectors can be mounted across the pipe diameter





External Spargers

 external sparger illustration

We can also supply a complete line of external spargers, which use high-shear tangential forces to produce a stream of micro-bubbles.


 external tangential velocity removable spargers

Call factory for sizing and application information






Chemical Injection and Sampling
Chemical Injection and Sampling
Chemical Injection and Sampling
Chemical Mixing
Chemical Mixing
Liquid into Gas
Liquid into Gas
Gas into Liquid
Gas into Liquid
Concentrated Acid Solutions
Concentrated Acid Solutions