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Breather Vents with Cap
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.
For technical drawings and 3-D models, click on a part number.


Vents | Replacement Screens | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Opening Dia. | Max. Flow Rate, gpm | Max. Temp., °F | Ht. | For Use With | Screen Material | Mount Type | Number of Bolt Holes | Bolts Included | Removes Particle Size Down To, microns | 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 |




Vents | Replacement Screens | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Opening Ht. | For Opening Wd. | Max. Flow Rate, gpm | Max. Temp., °F | Ht. | Wd. | Dp. | For Use With | Screen Material | Mount Type | Number of Bolt Holes | Bolts Included | Removes Particle Size Down To, microns | Each | Each | ||
Nylon Plastic 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.
For technical drawings and 3-D models, click on a part number.


Material | |||||||||
---|---|---|---|---|---|---|---|---|---|
Pipe Size | Max. Temp., °F | Ht. | Dia. | For Use With | Cap | Screen | For Max. Padlock Shackle Dia. | Each | |
NPT Male | |||||||||
2 | 200° | 4 1/2" | 5 5/8" | Air, Oil, Water | Aluminum | Stainless Steel | 3/8" | 0000000 | 000000 |
Breather Vents

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 has a slotted drive for installation with a screwdriver.
For technical drawings and 3-D models, click on a part number.
Style | Thread Size | Max. Flow Rate | Max. Pressure, psi | Max. Temp., °F | Ht. | Dia. | For Use With | Removes Particle Size Down To, microns | Each | |
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 | 000000 |
UNC Male | ||||||||||
316 Stainless Steel Body and Fitting | ||||||||||
G | 3/8"-16 | 50 scfm @ 100 psi | 100 | 750° | 1" | 3/8" | Air, Inert Gas | 10 | 0000000 | 00000 |
G | 5/16"-18 | 25 scfm @ 100 psi | 100 | 750° | 1 7/16" | 5/16" | Air, Inert Gas | 10 | 0000000 | 00000 |
Weather-Resistant Breather Vents
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.
For technical drawings and 3-D models, click on a part number.


Screen | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Style | Pipe Size | Ht. | Dia. | For Use With | Material | Construction | Mesh Size | Removes Particle Size Down To, microns | Each | |
NPT Male | ||||||||||
Zinc-Plated Steel Body and Fitting | ||||||||||
A | 3/8 | 1 1/4" | 1 1/4" | Air | 304 Stainless Steel | Wire Mesh | 100 | 140 | 00000000 | 000000 |
A | 1/2 | 1 7/16" | 1 1/4" | Air | 304 Stainless Steel | Wire Mesh | 100 | 140 | 00000000 | 00000 |
NPT Female | ||||||||||
Zinc-Plated Iron Body and Fitting | ||||||||||
B | 3/4 | 1 3/16" | 1 13/16" | Air | 304 Stainless Steel | Wire Mesh | 30 | 880 | 00000000 | 00000 |
B | 1 | 1 5/16" | 2 1/4" | Air | 304 Stainless Steel | Wire Mesh | 30 | 880 | 00000000 | 00000 |
B | 1 1/2 | 1 1/2" | 3 1/8" | Air | 304 Stainless Steel | Wire Mesh | 30 | 880 | 00000000 | 00000 |
B | 1 1/4 | 1 3/8" | 2 3/4" | Air | 304 Stainless Steel | Wire Mesh | 30 | 880 | 00000000 | 00000 |
B | 2 | 1 11/16" | 3 7/8" | Air | 304 Stainless Steel | Wire Mesh | 30 | 880 | 00000000 | 00000 |
B | 3 | 2 1/2" | 5 1/2" | Air | 304 Stainless Steel | Wire Mesh | 30 | 880 | 00000000 | 00000 |
B | 4 | 2 1/2" | 6 1/2" | Air | 304 Stainless Steel | Wire Mesh | 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.
For technical drawings and 3-D models, click on a part number.
Thread Size | Max. Pressure, psi | Max. Temp., °F | Ht. | Dia. | For Use With | O-Ring Material | Removes Particle Size Down To, microns | Each | |
Threaded Metric Male | |||||||||
---|---|---|---|---|---|---|---|---|---|
303 Stainless Steel Body and Fitting | |||||||||
M3 | 1.4 | 158° | 5/16" | 1/4" | Air | EPDM Rubber | 3 | 0000000 | 000000 |
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.
Stainless steel breather vents stand up to higher temperatures than polyethylene breather vents. Those with a Viton® fluoroelastomer O-ring offer extra protection against leaks. 316 stainless steel breather vents resist corrosion better than 303 and 304 stainless steel breather vents.
For technical drawings and 3-D models, click on a part number.
Pipe Size | Thread Size | Max. Flow Rate | Max. Pressure, psi | Max. Temp., °F | Ht. | For Use With | O-Ring Material | Removes Particle Size Down To, microns | Each | |
NPT Male | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
304 Stainless Steel Body and Fitting | ||||||||||
1/8 | __ | 26 scfm @ 100 psi | 150 | 400° | 1/2" | Air, Inert Gas | __ | 100 | 0000000 | 00000 |
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 |
UNF Male | ||||||||||
303 Stainless Steel Body and Fitting | ||||||||||
__ | 10-32 | Not Rated | 250 | 400° | 7/16" | Air, Inert Gas | Viton® Fluoroelastomer Rubber | 40 | 0000000 | 00000 |
316 Stainless Steel Body and Fitting | ||||||||||
__ | 10-32 | Not Rated | 250 | 400° | 7/16" | Air, Inert Gas | Viton® Fluoroelastomer Rubber | 40 | 0000000 | 00000 |
Metric Male | ||||||||||
316 Stainless Steel Body and Fitting | ||||||||||
__ | M5 | Not Rated | 250 | 400° | 7/16" | Air, Inert Gas | Viton® Fluoroelastomer Rubber | 40 | 0000000 | 00000 |
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.
316 stainless steel breather vents have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Hazardous Location Threaded Breather Vents

Safe for use around flammable and combustible gases, vapors, fibers, and dust, these vents allow air to flow through enclosures to maintain consistent pressure and reduce moisture buildup as temperatures change. They also stand up to washdowns. Made from 303 stainless steel, these vents will not corrode from salt water and chemicals.
For technical drawings and 3-D models, click on a part number.
Pipe Size | Thread Type | For Hole Diameter | Head Diameter | Protection Type | Environmental Rating | Specifications Met | UL File Number | Each | |
303 Stainless Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|
1/2 | NPT | 7/8" | 7/8" | Dust-Ignition Proof, Explosion Proof | NEMA 4X; NEC Class I Divisions 1, 2 Groups B, C, D; NEC Class II Divisions 1, 2 Groups E, F, G; NEC Class III Divisions 1, 2 | UL Listed | E34997 | 0000000 | 0000000 |