Gas Filtration and Separation
Centro carries a complete online selection of gas filtration products to meet your needs. Whether you're looking for compressed air filtration or FRLs, we have the right product. Our gas vessels and coalescers...
Categories in Gas Filtration and Separation (4)
Compressed Air
Compressed air filtration is a critical component of air compression systems, designed to remove impurities and contaminants from compressed air. These filtration systems consist of various elements, including coalescing filters and particulate filters, to ensure that the compressed air is clean, dry, and free from pollutants. They find application in industries like manufacturing, automotive, and pharmaceuticals, where the quality of compressed air plays a crucial role in equipment performance and product quality.
Gas Filtering
Gas filtration parts are crucial components in filtration systems designed to remove impurities and contaminants from gases. These parts encompass various elements, such as filters, cartridges, and coalescers, ensuring that gases are purified and free from pollutants. Gas filtration parts find applications in multiple industries where gas purity is essential for equipment and environmental protection.
Oil/Mist Coalescing
Oil/Mist Coalescing filters remove fine oil aerosols, water droplets, and sub-micron liquid contaminants from compressed air and process gas streams. Liquid droplets collide and merge within the filter media, then drain away rather than passing downstream, protecting pneumatic equipment, instruments, and processes from oil carryover and moisture damage.
Mufflers & Silencers
Mufflers & Silencers reduce the noise generated by compressed air and gas exhausting to atmosphere, typically from pneumatic valves, cylinders, and other exhaust ports. Many also incorporate a filtration element to capture particulates and oil mist from the exhaust stream, protecting nearby personnel and equipment while keeping the work area cleaner and quieter.
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5,418 items
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XFHXCK, ELEMENT KIT HX-SERIES
$292.01
Available for Purchase
Subject to factory lead times
XFHXDK, ELEMENT KIT HX-SERIES
$364.01
Available for Purchase
Subject to factory lead times
XFHXEK, ELEMENT KIT HX-SERIES
$440.01
Available for Purchase
Subject to factory lead times
XFHXFK, ELEMENT KIT HX-SERIES
$517.01
Available for Purchase
Subject to factory lead times
XFHXHK, ELEMENT KIT HX-SERIES
$591.01
Available for Purchase
Subject to factory lead times
XFHXJK, ELEMENT KIT HX-SERIES
$733.02
Available for Purchase
Subject to factory lead times
ZLD-006, DRAIN ZERO AIR LOSS
$441.01
Available for Purchase
Subject to factory lead times
ZLD-013, DRAIN ZERO AIR LOSS
$0.00
Available for Purchase
Subject to factory lead times
ZLD-023, DRAIN ZERO AIR LOSS
$0.00
Available for Purchase
Subject to factory lead times
ZLD-100, ZERO LOSS AUTODRAIN 1/2 NPT
$0.00
Available for Purchase
Subject to factory lead times
ZLD-330, ZERO LOSS AUTODRAIN 1/2 NPT
$0.00
Available for Purchase
Subject to factory lead times
Silica gel is a spherical bread consisting of 97% silica and 3% alumina with a highly porous surface and a strong affinity for adsorbing water. Silica gel is also applied as a selective adsorbent for a wide-range of hydrocarbons, C02, siloxanes, sulfur, and many other compounds. Because silica gel fractures in the presence of liquid water, it is often protected with a pre-bed of activated alumina. In air and gas drying applications, dew points of -40°F and lower can be achieved with silica gel. Features and Benefits High moisture retention capacity under dynamic conditions, allowing heated desiccant dryers with a higher design capacity and lower regeneration temperature A uniform bead shape provides for a lower pressure drop and less abrasion than granular types of silica gel. Available in two types, non-indicating and indicating. Indicating silica gel is impregnated with a moisture indicator that changes color from blue to pink when saturated. High static adsorption (moisture retention) under certain relative humidity conditions Available in indicating (blue to pink) and non-indicating Available in 25lb pails, 50lb bags and 330lb steel drums Downloads Brochure Safety Data Sheet (SDS)
$385.00
Available for Purchase
Subject to factory lead times
Silica gel is a spherical bread consisting of 97% silica and 3% alumina with a highly porous surface and a strong affinity for adsorbing water. Silica gel is also applied as a selective adsorbent for a wide-range of hydrocarbons, C02, siloxanes, sulfur, and many other compounds. Because silica gel fractures in the presence of liquid water, it is often protected with a pre-bed of activated alumina. In air and gas drying applications, dew points of -40°F and lower can be achieved with silica gel. Features and Benefits High moisture retention capacity under dynamic conditions, allowing heated desiccant dryers with a higher design capacity and lower regeneration temperature A uniform bead shape provides for a lower pressure drop and less abrasion than granular types of silica gel. Available in two types, non-indicating and indicating. Indicating silica gel is impregnated with a moisture indicator that changes color from blue to pink when saturated. High static adsorption (moisture retention) under certain relative humidity conditions Available in indicating (blue to pink) and non-indicating Available in 25lb pails, 50lb bags and 330lb steel drums Downloads Brochure Safety Data Sheet (SDS)
$235.00
Available for Purchase
Subject to factory lead times
Silica gel is a spherical bread consisting of 97% silica and 3% alumina with a highly porous surface and a strong affinity for adsorbing water. Silica gel is also applied as a selective adsorbent for a wide-range of hydrocarbons, C02, siloxanes, sulfur, and many other compounds. Because silica gel fractures in the presence of liquid water, it is often protected with a pre-bed of activated alumina. In air and gas drying applications, dew points of -40°F and lower can be achieved with silica gel. Features and Benefits High moisture retention capacity under dynamic conditions, allowing heated desiccant dryers with a higher design capacity and lower regeneration temperature A uniform bead shape provides for a lower pressure drop and less abrasion than granular types of silica gel. Available in two types, non-indicating and indicating. Indicating silica gel is impregnated with a moisture indicator that changes color from blue to pink when saturated. High static adsorption (moisture retention) under certain relative humidity conditions Available in indicating (blue to pink) and non-indicating Available in 25lb pails, 50lb bags and 330lb steel drums Downloads Brochure Safety Data Sheet (SDS)
$2,269.95
Available for Purchase
Subject to factory lead times
Positive Displacement Blower Silencer Frames | 2" Pipe Stub | MNPT Model BBF200. Engineered to reduce discharge noise from positive displacement blowers, this silencer frame installs directly onto blower connections for maximum attenuation. Sold in quantities of 1pc.
$2,214.95
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Positive Displacement Blower Silencer Frames | 2.5" Pipe Stub | MNPT Model BBF250. Engineered to reduce discharge noise from positive displacement blowers, this silencer frame installs directly onto blower connections for maximum attenuation. Sold in quantities of 1pc.
$2,254.95
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Positive Displacement Blower Silencer Frames | 3" Pipe Stub | MNPT Model BBF300. Engineered to reduce discharge noise from positive displacement blowers, this silencer frame installs directly onto blower connections for maximum attenuation. Sold in quantities of 1pc.
$3,284.92
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Positive Displacement Blower Silencer Frames | 4" Pipe Stub | MNPT Model BBF400. Engineered to reduce discharge noise from positive displacement blowers, this silencer frame installs directly onto blower connections for maximum attenuation. Sold in quantities of 1pc.
$3,409.92
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Positive Displacement Blower Silencer Frames | 6" ANSI Pattern Model BBF600F. Engineered to reduce discharge noise from positive displacement blowers, this silencer frame installs directly onto blower connections for maximum attenuation. Sold in quantities of 1pc.
$5,944.86
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Air Muffler for Venting and Depressurization Applications | 0.75" connection Model CAM-SW8103-075C. Engineered for compressor venting and depressurization applications, this silencer reduces exhaust noise at the source. Sold in quantities of 4pcs.
$95.00
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Air Muffler for Venting and Depressurization Applications | 1" connection Model CAM-SW8109-100C. Engineered for compressor venting and depressurization applications, this silencer reduces exhaust noise at the source. Sold in quantities of 4pcs.
$119.00
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Air Muffler for Venting and Depressurization Applications | 1.25" connection Model CAM-SW8109-125C. Engineered for compressor venting and depressurization applications, this silencer reduces exhaust noise at the source. Sold in quantities of 4pcs.
$124.00
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Air Muffler for Venting and Depressurization Applications | 1.5" connection Model CAM-SW8211-150C. Engineered for compressor venting and depressurization applications, this silencer reduces exhaust noise at the source. Sold in quantities of 4pcs.
$168.00
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Air Muffler for Venting and Depressurization Applications | 2" connection Model CAM-SW8311-200C. Engineered for compressor venting and depressurization applications, this silencer reduces exhaust noise at the source. Sold in quantities of 4pcs.
$202.00
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
XFHXCK, ELEMENT KIT HX-SERIES
$292.01
Available for Purchase
Subject to factory lead times
XFHXDK, ELEMENT KIT HX-SERIES
$364.01
Available for Purchase
Subject to factory lead times
XFHXEK, ELEMENT KIT HX-SERIES
$440.01
Available for Purchase
Subject to factory lead times
XFHXFK, ELEMENT KIT HX-SERIES
$517.01
Available for Purchase
Subject to factory lead times
XFHXHK, ELEMENT KIT HX-SERIES
$591.01
Available for Purchase
Subject to factory lead times
XFHXJK, ELEMENT KIT HX-SERIES
$733.02
Available for Purchase
Subject to factory lead times
ZLD-006, DRAIN ZERO AIR LOSS
$441.01
Available for Purchase
Subject to factory lead times
ZLD-013, DRAIN ZERO AIR LOSS
$0.00
Available for Purchase
Subject to factory lead times
ZLD-023, DRAIN ZERO AIR LOSS
$0.00
Available for Purchase
Subject to factory lead times
ZLD-100, ZERO LOSS AUTODRAIN 1/2 NPT
$0.00
Available for Purchase
Subject to factory lead times
ZLD-330, ZERO LOSS AUTODRAIN 1/2 NPT
$0.00
Available for Purchase
Subject to factory lead times
Silica gel is a spherical bread consisting of 97% silica and 3% alumina with a highly porous surface and a strong affinity for adsorbing water. Silica gel is also applied as a selective adsorbent for a wide-range of hydrocarbons, C02, siloxanes, sulfur, and many other compounds. Because silica gel fractures in the presence of liquid water, it is often protected with a pre-bed of activated alumina. In air and gas drying applications, dew points of -40°F and lower can be achieved with silica gel. Features and Benefits High moisture retention capacity under dynamic conditions, allowing heated desiccant dryers with a higher design capacity and lower regeneration temperature A uniform bead shape provides for a lower pressure drop and less abrasion than granular types of silica gel. Available in two types, non-indicating and indicating. Indicating silica gel is impregnated with a moisture indicator that changes color from blue to pink when saturated. High static adsorption (moisture retention) under certain relative humidity conditions Available in indicating (blue to pink) and non-indicating Available in 25lb pails, 50lb bags and 330lb steel drums Downloads Brochure Safety Data Sheet (SDS)
$385.00
Available for Purchase
Subject to factory lead times
Silica gel is a spherical bread consisting of 97% silica and 3% alumina with a highly porous surface and a strong affinity for adsorbing water. Silica gel is also applied as a selective adsorbent for a wide-range of hydrocarbons, C02, siloxanes, sulfur, and many other compounds. Because silica gel fractures in the presence of liquid water, it is often protected with a pre-bed of activated alumina. In air and gas drying applications, dew points of -40°F and lower can be achieved with silica gel. Features and Benefits High moisture retention capacity under dynamic conditions, allowing heated desiccant dryers with a higher design capacity and lower regeneration temperature A uniform bead shape provides for a lower pressure drop and less abrasion than granular types of silica gel. Available in two types, non-indicating and indicating. Indicating silica gel is impregnated with a moisture indicator that changes color from blue to pink when saturated. High static adsorption (moisture retention) under certain relative humidity conditions Available in indicating (blue to pink) and non-indicating Available in 25lb pails, 50lb bags and 330lb steel drums Downloads Brochure Safety Data Sheet (SDS)
$235.00
Available for Purchase
Subject to factory lead times
Silica gel is a spherical bread consisting of 97% silica and 3% alumina with a highly porous surface and a strong affinity for adsorbing water. Silica gel is also applied as a selective adsorbent for a wide-range of hydrocarbons, C02, siloxanes, sulfur, and many other compounds. Because silica gel fractures in the presence of liquid water, it is often protected with a pre-bed of activated alumina. In air and gas drying applications, dew points of -40°F and lower can be achieved with silica gel. Features and Benefits High moisture retention capacity under dynamic conditions, allowing heated desiccant dryers with a higher design capacity and lower regeneration temperature A uniform bead shape provides for a lower pressure drop and less abrasion than granular types of silica gel. Available in two types, non-indicating and indicating. Indicating silica gel is impregnated with a moisture indicator that changes color from blue to pink when saturated. High static adsorption (moisture retention) under certain relative humidity conditions Available in indicating (blue to pink) and non-indicating Available in 25lb pails, 50lb bags and 330lb steel drums Downloads Brochure Safety Data Sheet (SDS)
$2,269.95
Available for Purchase
Subject to factory lead times
Positive Displacement Blower Silencer Frames | 2" Pipe Stub | MNPT Model BBF200. Engineered to reduce discharge noise from positive displacement blowers, this silencer frame installs directly onto blower connections for maximum attenuation. Sold in quantities of 1pc.
$2,214.95
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Positive Displacement Blower Silencer Frames | 2.5" Pipe Stub | MNPT Model BBF250. Engineered to reduce discharge noise from positive displacement blowers, this silencer frame installs directly onto blower connections for maximum attenuation. Sold in quantities of 1pc.
$2,254.95
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Positive Displacement Blower Silencer Frames | 3" Pipe Stub | MNPT Model BBF300. Engineered to reduce discharge noise from positive displacement blowers, this silencer frame installs directly onto blower connections for maximum attenuation. Sold in quantities of 1pc.
$3,284.92
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Positive Displacement Blower Silencer Frames | 4" Pipe Stub | MNPT Model BBF400. Engineered to reduce discharge noise from positive displacement blowers, this silencer frame installs directly onto blower connections for maximum attenuation. Sold in quantities of 1pc.
$3,409.92
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Positive Displacement Blower Silencer Frames | 6" ANSI Pattern Model BBF600F. Engineered to reduce discharge noise from positive displacement blowers, this silencer frame installs directly onto blower connections for maximum attenuation. Sold in quantities of 1pc.
$5,944.86
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Air Muffler for Venting and Depressurization Applications | 0.75" connection Model CAM-SW8103-075C. Engineered for compressor venting and depressurization applications, this silencer reduces exhaust noise at the source. Sold in quantities of 4pcs.
$95.00
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Air Muffler for Venting and Depressurization Applications | 1" connection Model CAM-SW8109-100C. Engineered for compressor venting and depressurization applications, this silencer reduces exhaust noise at the source. Sold in quantities of 4pcs.
$119.00
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Air Muffler for Venting and Depressurization Applications | 1.25" connection Model CAM-SW8109-125C. Engineered for compressor venting and depressurization applications, this silencer reduces exhaust noise at the source. Sold in quantities of 4pcs.
$124.00
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Air Muffler for Venting and Depressurization Applications | 1.5" connection Model CAM-SW8211-150C. Engineered for compressor venting and depressurization applications, this silencer reduces exhaust noise at the source. Sold in quantities of 4pcs.
$168.00
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
Air Muffler for Venting and Depressurization Applications | 2" connection Model CAM-SW8311-200C. Engineered for compressor venting and depressurization applications, this silencer reduces exhaust noise at the source. Sold in quantities of 4pcs.
$202.00
Should ship between 05 Nov and 07 Nov
Subject to factory lead times
FAQS
- Compressed air straight from a compressor contains three primary contaminants that must be removed before the air reaches pneumatic equipment, instruments, or products: solid particulates (dust, pipe scale, rust, and compressor wear debris), liquid water (condensed from atmospheric moisture during compression), and oil (from lubricant carryover in oil-lubricated compressors as liquid droplets, aerosols, and vapor). These contaminants damage pneumatic valves, cylinders, and instruments by causing corrosion, seal degradation, and clogging. In applications where compressed air contacts the product — food packaging, pharmaceutical manufacturing, electronics assembly, painting — contamination can cause product rejection, health hazards, and regulatory violations. Compressed air filtration uses a staged approach: a particulate filter removes solid particles, a coalescing filter removes liquid water and oil aerosols, and an adsorption (activated carbon) filter removes oil vapor and odors. The degree of filtration required depends on the application — ISO 8573-1 defines compressed air quality classes from Class 0 (highest purity) to Class 6 (general industrial) to help specify the appropriate filtration level.
- A coalescing filter removes liquid aerosols — tiny droplets of water and oil suspended in the compressed air stream — that are too small for a standard particulate filter to capture. The filter element is made of multiple layers of fine borosilicate glass fibers or similar coalescing media. As the aerosol-laden air passes through the element from the inside out, the micro-droplets collide with the fibers and progressively merge (coalesce) into larger and larger droplets. Once the droplets are large enough, gravity pulls them down to the bottom of the filter housing where they collect in a sump and are drained off — either manually or through an automatic drain. A properly selected coalescing filter can reduce oil aerosol content to 0.01 ppm and remove liquid water down to the aerosol level, though it does not remove water vapor (a compressed air dryer is needed for that). Coalescing filters are the workhorse of compressed air treatment systems and should be installed downstream of the aftercooler and water separator, and upstream of any air dryer.
- The proper sequence of compressed air treatment equipment follows the order in which contaminants are most effectively removed, with each stage protecting the next. Starting from the compressor discharge: first, an aftercooler cools the hot compressed air and condenses the bulk of the water vapor into liquid, which is removed by a moisture separator. Second, a particulate pre-filter (typically 3–5 micron) removes solid particles and protects the downstream coalescing filter from premature loading. Third, a coalescing filter (typically 0.01 micron) removes liquid water and oil aerosols down to trace levels. Fourth, if very dry air is required, a compressed air dryer (refrigerated, desiccant, or membrane type) reduces the dew point to the required level. Fifth, if oil-free air is required for food contact, pharmaceutical, or painting applications, an activated carbon adsorption filter removes oil vapor and odors that coalescing filters cannot capture. Finally, a point-of-use particulate filter at each machine or application provides a final safety barrier against any contaminants introduced by the distribution piping. Skipping stages or installing them out of order reduces performance and shortens element life.
- A particulate filter and a coalescing filter are both used in compressed air systems but remove different types of contaminants. A particulate filter removes solid particles — dust, pipe scale, rust, and compressor wear debris — from the air stream using a fibrous or pleated media element. Particles that are larger than the filter's rated pore size are trapped in or on the media. Particulate filters are available in various micron ratings, typically 1 to 25 microns for general service and down to 0.01 microns for high-purity applications. They do not effectively remove liquid water or oil in aerosol form. A coalescing filter is specifically designed to remove liquid aerosols — micro-droplets of water and oil that are suspended in the air stream as a mist. The coalescing media causes these tiny droplets to merge into larger droplets that drain by gravity. Coalescing filters also capture solid particles, but their primary function is aerosol removal. In a properly designed system, a particulate filter is installed upstream of the coalescing filter to protect the more expensive coalescing element from premature loading with solid debris.
- Compressed air filter sizing is based on the maximum air flow rate (measured in SCFM — standard cubic feet per minute), the operating pressure, and the allowable pressure drop across the filter. Every filter element has a rated flow capacity at a specific pressure and maximum recommended pressure drop — exceeding the rated flow causes excessive pressure drop, which wastes energy (every 2 psi of unnecessary pressure drop across a filter costs approximately 1% of compressor energy), reduces downstream tool and equipment performance, and can force contaminants through the media. To size correctly, determine the peak compressed air demand of all equipment downstream of the filter, select a filter housing and element combination whose rated flow capacity exceeds that demand at your operating pressure, and verify that the initial (clean element) pressure drop is acceptably low — typically less than 1–3 psi for a new element, leaving headroom for the differential pressure to increase as the element loads with contaminants. Also consider connection size — the filter's port size should match the distribution piping to avoid creating a flow bottleneck. Manufacturers publish sizing charts that make it straightforward to match flow rate, pressure, and connection size to the correct model.