Air Breathers | McMaster-Carr

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113 Products

Breather Vents


Style A	Style C	Style D	Style E

Style G	Style F	Style H

Protect against excess vacuum and pressure in cylinders, gear boxes, enclosures, manifolds, and tanks. You can also use these breather vents to block debris from entering equipment.

Style G—Style G has a slotted drive for installation with a screwdriver.

Style H—Style H has a Buna-N O-ring for extra protection against leaks.

Splash Guard—Breather vents with splash guard are good for containers that are often filled and drained; they have a guard that prevents oil from splashing out of the vent hole.

	Style	Pipe Size	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	Dia.	For Use With	Removes Particle Size Down To, μm	Features		Each
NPT Male







			Zinc-Plated Steel Body and Fitting

			A	2	—	1,095 scfm @ 100 psi	150	300	1 5/8"	—	Air, Inert Gas	90	—	0000000	000000


			D	1/8	—	Not Rated	Not Rated	225	1"	—	Air, Inert Gas, Oil, Water	40	—	0000000	00000
			D	1/4	—	Not Rated	Not Rated	225	1"	—	Air, Inert Gas, Oil, Water	40	—	0000000	00000
			D	3/8	—	Not Rated	Not Rated	225	1 1/16"	—	Air, Inert Gas, Oil, Water	40	—	0000000	00000
			D	1/2	—	Not Rated	Not Rated	225	1 3/16"	—	Air, Inert Gas, Oil, Water	40	—	0000000	00000
			D	3/4	—	Not Rated	Not Rated	225	1 1/4"	—	Air, Inert Gas, Oil, Water	40	—	0000000	00000
			E	1/8	—	Not Rated	Not Rated	225	1 3/16"	—	Air, Inert Gas, Oil, Water	40	Splash Guard	0000000	00000
			E	1/4	—	Not Rated	Not Rated	225	1 3/16"	—	Air, Inert Gas, Oil, Water	40	Splash Guard	0000000	00000
			E	3/8	—	Not Rated	Not Rated	225	1 1/4"	—	Air, Inert Gas, Oil, Water	40	Splash Guard	0000000	00000
			E	1/2	—	Not Rated	Not Rated	225	1 5/16"	—	Air, Inert Gas, Oil, Water	40	Splash Guard	0000000	00000
			E	3/4	—	Not Rated	Not Rated	225	1 3/8"	—	Air, Inert Gas, Oil, Water	40	Splash Guard	0000000	00000




					Nickel-Plated Steel Body and Fitting

					A	1/8	—	2 scfm @ 100 psi	150	300	7/16"	—	Air, Inert Gas	40	—	0000000	0000


					A	1/4	—	3 scfm @ 100 psi	150	300	5/8"	—	Air, Inert Gas	40	—	0000000	0000
					A	3/8	—	7 scfm @ 100 psi	150	300	3/4"	—	Air, Inert Gas	40	—	0000000	0000
					A	1/2	—	17 scfm @ 100 psi	150	300	7/8"	—	Air, Inert Gas	40	—	0000000	0000
					A	3/4	—	20 scfm @ 100 psi	150	300	1"	—	Air, Inert Gas	40	—	0000000	0000
					A	1	—	28 scfm @ 100 psi	150	300	1 5/16"	—	Air, Inert Gas	40	—	0000000	0000
					A	1 1/4	—	50 scfm @ 100 psi	150	300	1 7/16"	—	Air, Inert Gas	40	—	0000000	00000
					A	1 1/2	—	73 scfm @ 100 psi	150	300	1 1/2"	—	Air, Inert Gas	40	—	0000000	00000




							Brass Body and Fitting

							A	1/16	—	13 scfm @ 100 psi	150	300	1/2"	—	Air, Inert Gas	90	—	0000000	0000




									Nylon Body and Fitting

									C	1/4	—	Not Rated	Not Rated	210	1 9/16"	1 11/16"	Air, Oil	40	Splash Guard	0000000	0000


									C	3/8	—	Not Rated	Not Rated	210	1 3/4"	1 11/16"	Air, Oil	40	Splash Guard	0000000	0000
									C	1/2	—	Not Rated	Not Rated	210	1 13/16"	1 11/16"	Air, Oil	40	Splash Guard	0000000	0000
									C	3/4	—	Not Rated	Not Rated	210	1 13/16"	1 11/16"	Air, Oil	40	Splash Guard	0000000	0000


									UNF Male







											316 Stainless Steel Body and Fitting

		G									—	10-32	10 scfm @ 100 psi	100	750	7/16"	3/16"	Air, Inert Gas	10	—	0000000	00000




											Brass Body and Fitting

											A	—	10-32	6 scfm @ 100 psi	150	300	3/8"	—	Air, Inert Gas	90	—	0000000	0000


											H	—	10-32	1 scfm @ 100 psi	125	200	7/16"	—	Air, Inert Gas	40	—	0000000	0000


											UNC Male







													316 Stainless Steel Body and Fitting

													G	—	5/16"-18	25 scfm @ 100 psi	100	750	1 7/16"	5/16"	Air, Inert Gas	10	—	0000000	00000


													G	—	3/8"-16	50 scfm @ 100 psi	100	750	1"	3/8"	Air, Inert Gas	10	—	0000000	00000


													BSPT Male







															Zinc-Plated Steel Body and Fitting

															A	1/8	—	26 scfm @ 100 psi	150	300	7/16"	—	Air, Inert Gas	90	—	0000000	0000


							A								1/4	—	35 scfm @ 100 psi	150	300	11/16"	—	Air, Inert Gas	90	—	0000000	0000
							A	3/8							—	87 scfm @ 100 psi	150	300	13/16"	—	Air, Inert Gas	90	—	0000000	0000
							A	1/2							—	131 scfm @ 100 psi	150	300	1"	—	Air, Inert Gas	90	—	0000000	0000
							A	3/4							—	219 scfm @ 100 psi	150	300	1 1/16"	—	Air, Inert Gas	90	—	0000000	0000


							NPSM Female







									Zinc-Plated Steel Body and Fitting

									F	1/8							—	26 scfm @ 100 psi	150	300	5/8"	—	Air, Inert Gas	90	—	0000000	0000


F	1/4								—	35 scfm @ 100 psi							150	300	3/4"	—	Air, Inert Gas	90	—	0000000	0000
F	3/8								—	87 scfm @ 100 psi							150	300	15/16"	—	Air, Inert Gas	90	—	0000000	0000
F	1/2								—	131 scfm @ 100 psi							150	300	1"	—	Air, Inert Gas	90	—	0000000	0000

Corrosion Resistant Breather Vents

These breather vents withstand corrosion in damp environments. Use them to prevent excess vacuum and pressure in cylinders, gear boxes, and tanks and to block debris from entering equipment.

Threaded NPT Male


304 Stainless Steel	Polyethylene

Polyethylene Body and Fitting—Polyethylene breather vents can be cleaned with mineral spirits.

304 Stainless Steel Body and Fitting—Stainless steel breather vents stand up to higher temperatures than polyethylene breather vents.

	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	Dia.	For Use With	Removes Particle Size Down To, μm		Each
Polyethylene Body and Fitting



	1/8	1 scfm @ 100 psi	100	150	7/16"	1/2"	Air, Inert Gas	100	0000000	00000


	1/4	3 scfm @ 100 psi	100	150	1/2"	11/16"	Air, Inert Gas	100	0000000	0000
	3/8	9 scfm @ 100 psi	100	150	11/16"	15/16"	Air, Inert Gas	100	0000000	0000
	1/2	10 scfm @ 100 psi	100	150	11/16"	15/16"	Air, Inert Gas	100	0000000	0000
	3/4	20 scfm @ 100 psi	100	150	1 1/8"	1 1/2"	Air, Inert Gas	100	0000000	0000
	1	22 scfm @ 100 psi	100	150	1 3/8"	1 7/8"	Air, Inert Gas	100	0000000	0000


	304 Stainless Steel Body and Fitting



			1/8	26 scfm @ 100 psi	150	400	1/2"	—	Air, Inert Gas	100	0000000	0000


			1/4	35 scfm @ 100 psi	150	400	11/16"	—	Air, Inert Gas	100	0000000	00000
			3/8	87 scfm @ 100 psi	150	400	13/16"	—	Air, Inert Gas	100	0000000	00000
			1/2	131 scfm @ 100 psi	150	400	15/16"	—	Air, Inert Gas	100	0000000	00000
			3/4	219 scfm @ 100 psi	150	400	15/16"	—	Air, Inert Gas	100	0000000	00000
			1	306 scfm @ 100 psi	150	400	1 3/16"	—	Air, Inert Gas	100	0000000	00000

Threaded UNF Male


303 Stainless Steel	316 Stainless Steel

303 Stainless Steel Body and Fitting—Stainless steel breather vents stand up to higher temperatures than polyethylene breather vents.

316 Stainless Steel Body and Fitting—316 stainless steel breather vents resist corrosion better than 303 and 304 stainless steel breather vents and stand up to higher temperatures than polyethylene breather vents.

Viton® Fluoroelastomer O-Ring—Those with a Viton® Fluoroelastomer O-ring offer extra protection against leaks.

	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	For Use With	O-Ring Material	Removes Particle Size Down To, μm		Each
303 Stainless Steel Body and Fitting



	10-32	Not Rated	250	400	7/16"	Air, Inert Gas	Viton® Fluoroelastomer	40	0000000	000000


	316 Stainless Steel Body and Fitting



			10-32	Not Rated	250	400	7/16"	Air, Inert Gas	Viton® Fluoroelastomer	40	0000000	00000

Threaded Metric Male

316 Stainless

Steel

Viton® Fluoroelastomer O-Ring—Those with a Viton® Fluoroelastomer O-ring offer extra protection against leaks.

	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	For Use With	O-Ring Material	Removes Particle Size Down To, μm		Each
316 Stainless Steel Body and Fitting



	M5	Not Rated	250	400	7/16"	Air, Inert Gas	Viton® Fluoroelastomer	40	0000000	000000

Weather Resistant Breather Vents


Threaded NPT Male, Style A	Threaded NPT Female, Style B

Shield outdoor pipe and tank openings from the environment. Also known as vent caps, these breather vents have screens to allow air flow while blocking debris. Use them to prevent excess vacuum and pressure in your equipment.

Threaded NPT Male

Style A

									Screen
	Style	Pipe Size	Max. Flow Rate @ Pressure	Max. Pressure	Max. Temp.	Ht.	Dia.	For Use With	Material	Construction	Mesh Size	Removes Particle Size Down To, μm		Each
Zinc-Plated Steel Body and Fitting



		A	3/8	Not Rated	Not Rated	Not Rated	1 1/4"	1 1/4"	Air	304 Stainless Steel	Wire Mesh	100 × 100	140	00000000	000000


		A	1/2	Not Rated	Not Rated	Not Rated	1 7/16"	1 1/4"	Air	304 Stainless Steel	Wire Mesh	100 × 100	140	00000000	00000

Threaded NPT Female

Style B

									Screen
	Style	Pipe Size	Max. Flow Rate @ Pressure	Max. Pressure	Max. Temp.	Ht.	Dia.	For Use With	Material	Construction	Mesh Size	Removes Particle Size Down To, μm		Each
Zinc-Plated Iron Body and Fitting



		B	3/4	Not Rated	Not Rated	Not Rated	1 3/16"	1 13/16"	Air	304 Stainless Steel	Wire Mesh	30 × 30	880	00000000	000000


		B	1	Not Rated	Not Rated	Not Rated	1 5/16"	2 1/4"	Air	304 Stainless Steel	Wire Mesh	30 × 30	880	00000000	00000
		B	1 1/4	Not Rated	Not Rated	Not Rated	1 3/8"	2 3/4"	Air	304 Stainless Steel	Wire Mesh	30 × 30	880	00000000	00000
		B	1 1/2	Not Rated	Not Rated	Not Rated	1 1/2"	3 1/8"	Air	304 Stainless Steel	Wire Mesh	30 × 30	880	00000000	00000
		B	2	Not Rated	Not Rated	Not Rated	1 11/16"	3 7/8"	Air	304 Stainless Steel	Wire Mesh	30 × 30	880	00000000	00000
		B	3	Not Rated	Not Rated	Not Rated	2 1/2"	5 1/2"	Air	304 Stainless Steel	Wire Mesh	30 × 30	880	00000000	00000
		B	4	Not Rated	Not Rated	Not Rated	2 1/2"	6 1/2"	Air	304 Stainless Steel	Wire Mesh	20 × 20	864	00000000	000000

Washdown Weather Resistant Breather Vents

These breather vents are rated NEMA 6 to withstand periodic submersion in water. Install them in enclosures to stop the buildup of pressure and vacuum and to prevent debris from entering equipment. Breather vents can be used with enclosures that are rated NEMA 4, 12, and 13 for washdown environments and splashing oil and coolant.

Threaded UNF Male

Aluminum

Body

	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	Dia.	For Use With	Environment	Enclosure Rating	O-Ring Material	Removes Particle Size Down To, μm		Each
Aluminum Body and Fitting



	10-32	Not Rated	1.4	158	1/4"	3/8"	Air	Dusty, Outdoor, Submersible, Washdown, Wet	NEMA 6	EPDM	3	0000000	000000

Threaded Metric Male


303 Stainless Steel Body	Aluminum Body	Nylon Body	Polycarbonate Body

	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	Dia.	For Use With	Environment	Enclosure Rating	O-Ring Material	Removes Particle Size Down To, μm	Features		Each
303 Stainless Steel Body and Fitting



	M3	Not Rated	1.4	158	5/16"	1/4"	Air	Dusty, Outdoor, Submersible, Washdown, Wet	NEMA 6	EPDM	3	—	0000000	000000


	Nylon Body and Fitting



			M3	Not Rated	1.4	158	3/8"	5/16"	Air	Dusty, Outdoor, Submersible, Washdown, Wet	NEMA 6	—	3	—	0000000	00000


			Polycarbonate Body and Fitting



					M16	Not Rated	1.4	158	15/16"	1 1/16"	Air	Dusty, Outdoor, Submersible, Washdown, Wet	NEMA 6	Buna-N	3	Mounting Nut	0000000	00000


					Aluminum Body and Fitting



							M8	Not Rated	1.4	158	9/16"	9/16"	Air	Dusty, Outdoor, Submersible, Washdown, Wet	NEMA 6	EPDM	3	—	0000000	00000


							M20	Not Rated	1.4	158	1"	1 1/8"	Air	Dusty, Outdoor, Submersible, Washdown, Wet	NEMA 6	EPDM	1	—	0000000	00000

Barbed Male

ABS Body

Vents with barbed connections fit unthreaded openings and are held in place by friction.

	Max. Flow Rate @ Pressure	Max. Pressure, psi	Max. Temp., ° F	Ht.	Dia.	For Use With	Environment	Enclosure Rating	O-Ring Material	Removes Particle Size Down To, μm		Each
ABS Body and Fitting



	21/64"	Not Rated	4	158	9/16"	7/8"	Air	Dusty, Outdoor, Submersible, Washdown, Wet	NEMA 6	Silicone Rubber	1	0000000	00000

Moisture Absorbing 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.

Nylon and Polycarbonate Body—NPT Male

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 Tank Cap., gal.	Max. Flow Rate @ Pressure	Max. Temp., ° F	Ht.	Dia.	For Use With	Removes Particle Size Down To, μm		Each
Nylon and Polycarbonate Body with Nylon Fitting



	3/8	1 to 2	4.5 scfm @ 1 psi	200	4"	2 1/2"	Air, Inert Gas	3	0000000	000000


	3/8	1 to 5	4 scfm @ 1 psi	200	5 3/8"	2 1/2"	Air, Inert Gas	3	0000000	00000
	1	5 to 200	16 scfm @ 1 psi	200	6 1/8"	4 1/8"	Air, Inert Gas	3	0000000	00000
	1	5 to 350	16 scfm @ 1 psi	200	8 1/8"	4 1/8"	Air, Inert Gas	3	0000000	000000
	1	5 to 500	16 scfm @ 1 psi	200	10 1/8"	4 1/8"	Air, Inert Gas	3	0000000	000000

Nylon and Polycarbonate Body with Check Valves—NPT Female

Image of Product. Front orientation. Contains Inset. Breather Vents. Moisture Absorbing Breather Vents, NPT Thread, Polycarbonate Body, Nylon Body, Female.

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 Tank Cap., gal.	Max. Flow Rate @ Pressure	Max. Temp., ° F	Ht.	Dia.	For Use With	Removes Particle Size Down To, μm		Each
Nylon and Polycarbonate Body with Nylon Fitting



	1	1 to 400	27 scfm @ 1 psi	200	4 11/16"	5 11/16"	Air, Inert Gas	3	0000000	0000000


	1	1 to 600	26 scfm @ 1 psi	200	6 7/16"	5 11/16"	Air, Inert Gas	3	0000000	000000
	1	1 to 800	25 scfm @ 1 psi	200	8 1/4"	5 11/16"	Air, Inert Gas	3	0000000	000000
	1	1 to 1,000	24 scfm @ 1 psi	200	10"	5 11/16"	Air, Inert Gas	3	0000000	000000

Steel Body—NPT Male


	Repair Kits

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.

Repair Kits—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.

	Breather Vents										Repair Kits
	Pipe Size	For Tank Cap., gal.	Max. Flow Rate @ Pressure	Max. Temp., ° F	Ht.	Dia.	For Use With	Removes Particle Size Down To, μm		Each		Each
Steel Body



		2	1 to 800	85 scfm @ 1 psi	220	11 1/2"	10 1/8"	Air	1	0000000	000000000	00000000	0000000


		2	1 to 1,300	85 scfm @ 1 psi	220	13 3/4"	10 1/8"	Air	1	0000000	00000000	00000000	000000
		2	1 to 2,400	80 scfm @ 1 psi	220	18 1/4"	10 1/8"	Air	1	0000000	00000000	00000000	000000
		3	1 to 4,000	205 scfm @ 1 psi	220	19 1/4"	15 1/2"	Air	1	0000000	00000000	00000000	000000

Self-Draining Breather Vents

Minimize moisture buildup in enclosures. Also known as drain plugs, these breather vents have a small outlet that allows condensation to drain. They have a silicone O-ring above the threads for a tight seal. Install them at the lowest point of the enclosure. Breather vents meet IP66 for protection in washdown environments. Use them to prevent excess vacuum and pressure in cylinders, gear boxes, and tanks and to block debris from entering equipment.

Threaded NPT Male

Image of Product. Bottom orientation. Breather Vents. Self-Draining Breather Vents.

316 Stainless Steel Body and Fitting—316 stainless steel breather vents have excellent corrosion resistance.

Brass Body and Fitting—Brass breather vents have good corrosion resistance.

	Max. Flow Rate @ Pressure	Max. Pressure	Max. Temp., ° F	Ht.	Dia.	For Use With	Environment	Hazardous Location Protection Type	Enclosure Rating	Hazardous Location Rating	O-Ring Material	Certification	Features		Each
316 Stainless Steel Body and Fitting



	1/4	Not Rated	Not Rated	320	1 1/16"	11/16"	Air	Corrosive, Dusty, Outdoor, Washdown, Wet	—	IP66, NEMA 4X	—	Silicone Rubber	—	Drain	0000000	000000


	1/2	Not Rated	Not Rated	320	1 1/8"	1"	Air	Corrosive, Dusty, Hazardous, Outdoor, Washdown, Wet	Increased Safety, Protection by Enclosure	IP66, NEMA 4X	ATEX I M2 Ex E I Mb; ATEX II 2 GD Ex E IIC Gb Ex Tb IIIC Db; IEC Zone 1 Groups IIC, IIB, IIA; IEC Zone 21 Groups IIIC, IIIB, IIIA; IECEx Ex E I/IIC Mb/Gb; IECEx Ex IIIC Tb Db	Silicone Rubber	CE Marked	Drain	0000000	00000


	Brass Body and Fitting



			1/4	Not Rated	Not Rated	320	1 1/16"	11/16"	Air	Corrosive, Dusty, Outdoor, Washdown, Wet	—	IP66, NEMA 4X	—	Silicone Rubber	—	Drain	0000000	00000


			1/2	Not Rated	Not Rated	320	1 1/8"	1"	Air	Corrosive, Dusty, Hazardous, Outdoor, Washdown, Wet	Increased Safety, Protection by Enclosure	IP66, NEMA 4X	ATEX I M2 Ex E I Mb; ATEX II 2 GD Ex E IIC Gb Ex Tb IIIC Db; IEC Zone 1 Groups IIC, IIB, IIA; IEC Zone 21 Groups IIIC, IIIB, IIIA; IECEx Ex E I/IIC Mb/Gb; IECEx Ex IIIC Tb Db	Silicone Rubber	CE Marked	Drain	0000000	00000

Breather Vents with Cap


Style A	Style B	Style C	Style D	Replacement Screen

Add a filling port to your hydraulic tank while protecting against excess pressure and vacuum. Breather vents stop debris from entering your tank. Mount them on top of standard tank openings with included hardware.

Style A


	Replacement Screen

	Breather Vents												Replacement Screens
	For Opening Dia.	Max. Flow Rate, gpm	Max. Temp., ° F	Ht.	For Use With	Screen Material	Mount Type	No. of Bolt Holes	Bolts Included	Removes Particle Size Down To, μm		Each		Each
Steel Body







				304 Stainless Steel Cap

				2 1/8"	20	220	5"	Air, Oil	304 Stainless Steel	Flange	6	Yes	40	0000000	000000	0000000	000000




						Steel Cap

						2 1/8"	192	250	5 1/8"	Air, Oil	304 Stainless Steel	Flange	6	Yes	40	0000000	00000	0000000	0000

Style B

	Ht.	For Use With	Screen Material	Mount Type	No. of Bolt Holes	Bolts Included	Removes Particle Size Down To, μm		Each
Nylon Body







	Nylon Cap

	2"	Not Rated	195	5 3/4"	Air, Oil	Nylon	Flange	6	Yes	40	0000000	000000

Style C


	Replacement Screen

	Breather Vents												Replacement Screens
	For Opening Dia.	Max. Flow Rate, gpm	Max. Temp., ° F	Ht.	For Use With	Screen Material	Mount Type	No. of Bolt Holes	Bolts Included	Removes Particle Size Down To, μm		Each		Each
Steel Body







				304 Stainless Steel Cap

				2 1/8"	20	220	5 3/4"	Air, Oil	Nylon	Flange	6	Yes	40	0000000	000000	0000000	000000




						Steel Cap

						2 1/8"	115	Not Rated	5 1/8"	Air, Oil	304 Stainless Steel	Flange	6	Yes	10	00000000	00000	0000000	0000


						2 1/8"	115	Not Rated	6 1/8"	Air, Oil	Nylon	Flange	6	Yes	10	00000000	00000	00000000	0000
						2 1/8"	190	150	6 1/8"	Air, Oil	Nylon	Flange	6	Yes	40	0000000	00000	00000000	0000

Style D


	Replacement Screen

	Breather Vents															Replacement Screens
	For Opening Ht.	For Opening Wd.	Max. Flow Rate, gpm	Max. Temp.	Ht.	Wd.	Dp.	For Use With	Screen Material	Mount Type	No. of Bolt Holes	Bolts Included	Removes Particle Size Down To, μm		Each		Each
Nylon Body







				Steel Cap

				3 1/2"	3"	115	Not Rated	6 1/8"	4 5/8"	4"	Air, Oil	304 Stainless Steel	Flange	7	Yes	10	00000000	000000	0000000	00000


				3 1/2"	3"	192	Not Rated	6 1/8"	4 5/8"	4"	Air, Oil	304 Stainless Steel	Flange	7	Yes	40	00000000	00000	0000000	0000

Lockable Breather Vents with Cap

Secure access to vented openings in pipe and tanks—the cap can be locked to prevent tampering. These breather vents allow you to add a filling port to your hydraulic tank while protecting against excess pressure and vacuum. Use them to stop debris from entering your tank. Breather vents mount on top of standard tank openings with included hardware. Padlock is not included.

Flange Mount


Steel with 304 Stainless Steel Screen	Steel with Nylon Plastic Screen

	Max. Pressure	Ht.	For Use With	Cap Material	Screen Material	No. of Bolt Holes	Bolts Included	Removes Particle Size Down To, μm	For Max. Padlock Shackle Dia.		Each
Steel Body



	2 1/8"	Not Rated	5 1/8"	Air, Oil	Steel	304 Stainless Steel	6	Yes	10	3/8"	0000000	000000


	2 1/8"	Not Rated	5 1/8"	Air, Oil	Steel	304 Stainless Steel	6	Yes	40	3/8"	0000000	00000
	2 1/8"	Not Rated	6 1/8"	Air, Oil	Steel	Nylon	6	Yes	10	3/8"	0000000	00000
	2 1/8"	Not Rated	6 1/8"	Air, Oil	Steel	Nylon	6	Yes	40	3/8"	0000000	00000

Hazardous-Location Electrical Enclosure Drain Vents


Glass-Filled Nylon	316 Stainless Steel

Safe for use around hazardous gasses and dust, these drain vents maintain steady pressure and prevent moisture buildup from temperature changes inside enclosures. They allow air to flow through the enclosures while protecting the contents from washdowns, dirt, and weather. Install these drain vents at the lowest point on an enclosure, so moisture can drip out.

Increased Safety—Increased-safety drain vents keep sparks, high temperatures, or current creepage inside an enclosure, so they won’t ignite flammable gasses and dust.

Flameproof—Flameproof drain vents reduce the risk of igniting flammable gasses and dust if an explosion occurs within the enclosure.

Glass-Filled Nylon—Glass-filled nylon drain vents are lightweight yet durable. They’re good for most areas.

316 Stainless Steel—316 stainless steel drain vents stand up to corrosion. They’re best for areas with salt water.

	Nut Material	O-Ring Material	Color	Max. Temp., ° F	Hazardous Location Rating		Each
Increased-Safety Drain Vents







	Glass-Filled Nylon

	M20 × 1.5 mm	1 1/4"	NEMA 4X, IP66	Brass	Buna-N	Black	185	ATEX II 2DG IECEx Ex Tb IIIC Db IECEx Exe II Gb NEC Class I Division 2 Groups A, B, C, D	0000000	000000




			316 Stainless Steel

			M20 × 1.5 mm	1"	NEMA 4X, IP66	316 Stainless Steel	Buna-N	—	185	ATEX Ex E IIC Gb ATEX Ex Tb IIIC Db IECEx Ex E IIC Gb IECEx Ex Tb IIIC Db NEC Class I Division 2 Groups A, B, C, D	0000000	000000


			M25 × 1.5 mm	1 5/16"	NEMA 4X, IP66	316 Stainless Steel	Buna-N	—	185	ATEX Ex E IIC Gb ATEX Ex Tb IIIC Db IECEx Ex E IIC Gb IECEx Ex Tb IIIC Db NEC Class I Division 2 Groups A, B, C, D	000000	000000


			Flameproof Drain Vents







							316 Stainless Steel

							M20 × 1.5 mm	1"	NEMA 4X, IP66	—	Silicone Rubber	—	300	ATEX Ex D IIC Gb ATEX Ex E IIC Gb ATEX Ex Tb IIIC Db IECEx Ex D IIC Gb IECEx Ex E IIC Gb IECEx Ex Tb IIIC Db NEC Class I Division 2 Groups A, B, C, D	0000000	000000


							M25 × 1.5 mm	1 5/16"	NEMA 4X, IP66	—	Silicone Rubber	—	300	ATEX Ex D IIC Gb ATEX Ex E IIC Gb ATEX Ex Tb IIIC Db IECEx Ex D IIC Gb IECEx Ex E IIC Gb IECEx Ex Tb IIIC Db NEC Class I Division 2 Groups A, B, C, D	0000000	000000

Electrical Enclosure Drain Vents

Mount to the outside of your enclosure to prevent moisture from being trapped inside. Rated NEMA 4X for protection from washdowns and corrosion.

Wd.	Dp.	Enclosure Rating	Material	Mounting Fasteners Included	Color		Each



2 3/4"	2"	11/16"	NEMA 4X	Fiberglass	Yes	Gray	000000	000000