Dessicant Filters | McMaster-Carr

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Removes Particle Size Down To

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59 Products

About Air Preparation

Moisture-Eliminating Breather Vents

Keep moisture, dirt, and debris from entering your oil reservoirs. The silica gel inside these breather vents absorbs moisture from the air, preventing rust from forming inside your tanks. The gel changes from blue to pink as it becomes saturated, letting you know it needs to be replaced. A second filter blocks dust and other particles from getting inside. These breather vents allow air to flow in and out of your lubrication system, keeping excess vacuum or pressure from building up in cylinders, gear boxes, and tanks.

Breather vents with a plastic body are clear, so a quick glance will tell you if the gel is saturated. Unlike steel versions, which can be rebuilt, the entire unit must be replaced when fresh gel is needed. For washdown environments, select breather vents with check valves. These valves allow air to flow in and out, but close when liquids try to enter.

For an extended service life, use breather vents with a steel body. They are stronger than breather vents with plastic bodies and hold up better when exposed to chemicals. A window lets you check the color of the gel. No need to replace the entire unit when the gel is saturated—use rebuild kits to add fresh gel and to replace the window, filters, and gaskets.

Plastic Breather Vents—NPT Male

Plastic—NPT Male

Nylon and Polycarbonate Plastic Body and Nylon Plastic Fitting
Pipe Size	For Tank Capacity, gal.	Max. Flow Rate	Max. Temp., °F	Ht.	Dia.	For Use With	Removes Particle Size Down To, microns		Each
3/8	1-2	4.5 scfm @ 1 psi	200°	4"	2 1/2"	Air, Inert Gas	3	0000000	000000
3/8	1-5	4 scfm @ 1 psi	200°	5 3/8"	2 1/2"	Air, Inert Gas	3	0000000	00000
1	5-200	16 scfm @ 1 psi	200°	6 1/8"	4 1/8"	Air, Inert Gas	3	0000000	00000
1	5-350	16 scfm @ 1 psi	200°	8 1/8"	4 1/8"	Air, Inert Gas	3	0000000	000000
1	5-500	16 scfm @ 1 psi	200°	10 1/8"	4 1/8"	Air, Inert Gas	3	0000000	000000

Plastic Breather Vents with Check Valves—NPT Female

Plastic—NPT Female

Nylon and Polycarbonate Plastic Body and Nylon Plastic Fitting
Pipe Size	For Tank Capacity, gal.	Max. Flow Rate	Max. Temp., °F	Ht.	Dia.	For Use With	Removes Particle Size Down To, microns		Each
1	1-400	27 scfm @ 1 psi	200°	4 11/16"	5 11/16"	Air, Inert Gas	3	0000000	0000000
1	1-600	26 scfm @ 1 psi	200°	6 7/16"	5 11/16"	Air, Inert Gas	3	0000000	000000
1	1-800	25 scfm @ 1 psi	200°	8 1/4"	5 11/16"	Air, Inert Gas	3	0000000	000000
1	1-1,000	24 scfm @ 1 psi	200°	10"	5 11/16"	Air, Inert Gas	3	0000000	000000

Steel Breather Vents—NPT Male

Steel—NPT Male

Rebuild Kit

Breather Vents										Rebuild Kits
Pipe Size	For Tank Capacity, gal.	Max. Flow Rate	Max. Temp., °F	Ht.	Dia.	For Use With	Removes Particle Size Down To, microns		Each		Each
Steel Body and Fitting
2	1-800	85 scfm @ 1 psi	220°	11 1/2"	10 1/8"	Air	1	0000000	000000000	00000000	0000000
2	1-1,300	85 scfm @ 1 psi	220°	13 3/4"	10 1/8"	Air	1	0000000	00000000	00000000	000000
2	1-2,400	80 scfm @ 1 psi	220°	18 1/4"	10 1/8"	Air	1	0000000	00000000	00000000	000000
3	1-4,000	205 scfm @ 1 psi	220°	19 1/4"	15 1/2"	Air	1	0000000	00000000	00000000	000000

Disposable Desiccant Compressed Air Dryer/Filters for Oil and Particle Removal

Use these dryer/filters to protect air-powered tools from water, oil, oil vapor, and particles, then throw them away when you're done. They have a polyurethane housing that has excellent resistance to synthetic compressor lubricants, solvents, acids, and chemicals. The bowl is clear so you can monitor the desiccant. When it becomes saturated, it changes color to indicate the dryer/filter should be replaced. Install in your air line just before the tool you wish to protect.

For technical drawings and 3-D models, click on a part number.

Pipe Size								Overall
Inlet	Outlet	Connections	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Dew Point Temp. Reduction Rate	Removes Particle Size Down To, microns	Dia.	Ht.	Desiccant Included		Each
Polyurethane Rubber Housing
Polyurethane Rubber Bowl—Clear
1/4	1/4	NPT Female	5 scfm @ 100 psi	250	180°	20%	0.3	2 7/8"	4 1/2"	Yes	0000000	0000000

Desiccant Compressed Air Dryer/Filters for Oil and Particle Removal

Acrylic Bowl

Aluminum Bowl

Polyurethane Bowl

These dryer/filters have a clay desiccant that removes moisture, oil, and particles, so there’s no need to install a separate filter and dryer. Once aftercoolers and separators have removed the bulk of the water, they remove any remaining moisture in your air line. Dryer/filters have a clear bowl or sight glass that allow you to see inside to monitor the contents. When the desiccant becomes saturated, it changes color to indicate that it should be replaced.

Dryer/filters with an aluminum bowl stand up to synthetic compressor lubricants and solvents better than dyers with an acrylic plastic bowl can.

Dryer/filters with a polyurethane bowl have excellent resistance to synthetic compressor lubricants, solvents, acids, and other chemicals.

For technical drawings and 3-D models, click on a part number.

Dryer/Filters
Inlet		Outlet						Overall				Replacement Desiccant		Replacement Filter Elements
Pipe Size	Connection	Pipe Size	Connection	Max. Flow Rate	Max. Pressure, psi	Max. Temp., °F	Housing Material	Dia.	Ht.		Each		Each		Each
Acrylic Plastic Bowl—Clear
1/2	NPT Female	1/2	NPT Female	20 scfm @ 100 psi	150	150°	Aluminum	4 3/8"	11 7/8"	0000000	0000000	0000000	000000	000000	00
1	NPT Female	1	NPT Female	60 scfm @ 100 psi	150	150°	Aluminum	6 1/2"	19 3/4"	0000000	00000000	0000000	00000	000000	00
1 1/2	NPT Female	1 1/2	NPT Female	100 scfm @ 100 psi	150	150°	Aluminum	8"	21 3/4"	0000000	00000000	0000000	00000	000000	00
2	NPT Female	2	NPT Female	200 scfm @ 100 psi	150	150°	Aluminum	9 1/2"	19 1/8"	0000000	00000000	0000000	000000	000000	00
Aluminum Bowl—Opaque with Sight Glass
1/2	NPT Female	1/2	NPT Female	20 scfm @ 100 psi	250	150°	Aluminum	4 3/8"	11 7/8"	000000	00000000	0000000	00000	000000	00
1	NPT Female	1	NPT Female	60 scfm @ 100 psi	250	150°	Aluminum	6 1/2"	19 3/4"	000000	00000000	0000000	00000	000000	00
1 1/2	NPT Female	1 1/2	NPT Female	100 scfm @ 100 psi	250	150°	Aluminum	8"	21 3/4"	000000	00000000	0000000	00000	000000	00
2	NPT Female	2	NPT Female	200 scfm @ 100 psi	250	150°	Aluminum	9 1/2"	19 1/8"	000000	00000000	0000000	000000	000000	00
Polyurethane Rubber Bowl—Clear
1/2	NPT Female	1/2	NPT Female	20 scfm @ 100 psi	250	180°	Polyurethane Rubber	4 5/8"	10 5/8"	000000	000000	0000000	00000	0000000	000000
1/2	NPT Male	1/2	NPT Male	15 scfm @ 100 psi	250	180°	Polyurethane Rubber	3 1/8"	9 1/4"	0000000	000000	0000000	00000	000000	00
1	NPT Female	1	NPT Female	40 scfm @ 100 psi	250	180°	Polyurethane Rubber	6 1/8"	9 1/2"	000000	00000000	0000000	00000	0000000	000000
1	NPT Female	1	NPT Female	60 scfm @ 100 psi	250	180°	Polyurethane Rubber	6 1/8"	14 3/4"	000000	00000000	0000000	00000	0000000	000000

Easy-View Desiccant Compressed Air Dryer/Filters for Oil and Particle Removal

Air Dryer/Filter

Air Dryer/Filter with Shut-Off Valve

Air Dryer/Filter/Regulator with Shut-Off Valve

With a clear polycarbonate bowl that’s visible from all angles and silica gel desiccant that changes from blue to pink, it’s easy to see when it’s time to change the cartridge on these dryer/filters and dryer/filter/regulators. In addition to water, they remove compressor oil and particles, preventing damage to air-powered tools and equipment. Unlike some desiccant dryers, they don't require a filter to protect the desiccant. Both the dryer and filter are in the same cartridge, saving space and reducing downtime when they need to be changed. Install them after aftercoolers and separators, which remove the bulk of the moisture.

Dryer/filters and dryer/filter/regulators with a shut-off valve can stop the flow of air when the units are not in use to extend the life of the desiccant.

Dryer/filter/regulators have a regulator to monitor and adjust the flow of air.

Dryer/Filters
Pipe Size									Overall						Replacement Desiccant
Inlet	Outlet	Connections	Max. Flow Rate	Pressure Regulating Range, psi	Max. Pressure, psi	Max. Temp., °F	Removes Particle Size Down To, microns	Housing Material	Ht.	Wd.	Dp.	Gauge Included		Each		Each
Polycarbonate Plastic Bowl—Clear
Air Dryer/Filter
1/2	1/2	NPT Female	30 scfm @ 120 psi	__	120	120°	40	Aluminum	16 7/8"	3"	3"	No	0000000	0000000	0000000	0000000
1/2	1/2	NPT Female	40 scfm @ 120 psi	__	120	120°	40	Aluminum	21"	4"	4"	No	0000000	000000	0000000	000000
Air Dryer/Filter with Shut-Off Valve
1/2	1/2	NPT Female	30 scfm @ 120 psi	__	120	120°	40	Aluminum	16 7/8"	12"	3"	No	0000000	000000	0000000	000000
1/2	1/2	NPT Female	40 scfm @ 120 psi	__	120	120°	40	Aluminum	21"	13"	4"	No	0000000	000000	0000000	000000
Air Dryer/Filter/Regulator with Shut-Off Valve
1/2	1/2	NPT Female	30 scfm @ 120 psi	5-120	120	120°	40	Aluminum	17 1/8"	15"	3"	Yes	0000000	000000	0000000	000000
1/2	1/2	NPT Female	40 scfm @ 120 psi	5-120	120	120°	40	Aluminum	21 1/4"	16"	4"	Yes	0000000	000000	0000000	000000

Disposable Desiccant Compressed Air Dryers with Filters for Particle Removal

Install these dryers just before air-powered tools as final protection from water and particles and throw them away when you’re done. They have a clear bowl so you can see inside to monitor the desiccant. When the desiccant becomes saturated, it changes color to indicate that the dryer should be changed.

For technical drawings and 3-D models, click on a part number.

Inlet		Outlet							Overall
Pipe Size	Connection	Pipe Size	Connection	Max. Flow Rate	Dew Point Temp., °F	Max. Pressure, psi	Max. Temp., °F	Removes Particle Size Down To, microns	Dia.	Ht.	Desiccant Included		Each
Polycarbonate Plastic Bowl—Clear
1/4	NPT Female	1/4	NPT Male	20 scfm @ 100 psi	-30°	125	130°	40	1 3/4"	3 3/4"	Yes	000000	000000

Desiccant Compressed Air Dryers

Once aftercoolers and separators have removed the bulk of the water, use these dryers to remove any remaining moisture in your air line. To reuse saturated desiccant, heat it at its reactivation temperature until it returns to its dry desiccant color. Install after an oil filter to protect the desiccant.

Dryers with a clear bowl and dryers with a sight glass allow you to see inside to monitor contents.

Dryers with a metal bowl are more durable and stand up to vapor better than dryers with a plastic bowl.

For technical drawings and 3-D models, click on a part number.

Style D

Dryers
Pipe Size								O'all				Replacement Desiccant
Inlet	Outlet	Connections	Max. Flow Rate	Dew Point Temp., °F	Max. Temp., °F	Max. Pressure, psi	Housing Material	Ht.	Dia.		Each		Each
Acrylic Plastic Bowl—Clear
1/2	1/2	NPT Female	20 scfm @ 100 psi	-40°	150°	150	Aluminum	11 7/8"	4 3/8"	00000000	000000000	0000000	000000
1	1	NPT Female	60 scfm @ 100 psi	-40°	150°	150	Aluminum	19 3/4"	6 1/2"	00000000	00000000	0000000	00000
1 1/2	1 1/2	NPT Female	100 scfm @ 100 psi	-40°	150°	150	Aluminum	21 3/4"	8"	00000000	00000000	0000000	000000
2	2	NPT Female	200 scfm @ 100 psi	-40°	150°	150	Aluminum	19 1/8"	9 1/2"	00000000	00000000	0000000	000000

Style E

Dryers
Pipe Size								O'all				Replacement Desiccant
Inlet	Outlet	Connections	Max. Flow Rate	Dew Point Temp., °F	Max. Temp., °F	Max. Pressure, psi	Housing Material	Ht.	Dia.		Each		Each
Aluminum Bowl—Opaque with Sight Glass
1	1	NPT Female	60 scfm @ 100 psi	-40°	150°	250	Aluminum	19 3/4"	6 1/2"	000000	000000000	0000000	000000
1 1/2	1 1/2	NPT Female	100 scfm @ 100 psi	-40°	150°	250	Aluminum	21 3/4"	8"	000000	00000000	0000000	000000
2	2	NPT Female	200 scfm @ 100 psi	-40°	150°	250	Aluminum	19 1/8"	9 1/2"	000000	00000000	0000000	000000