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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 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
For Opening Dia. | Ht. | For Use With | Cap | Screen | Mount Type | Bolts Included | Removes Particle Size Down To, microns | For Max. Padlock Shackle Dia. | Each | |
2 1/8" | 5 1/8" | Air, Oil | Steel | 304 Stainless Steel | Flange | Yes | 10 | 3/8" | 0000000 | 000000 |
2 1/8" | 5 1/8" | Air, Oil | Steel | 304 Stainless Steel | Flange | Yes | 40 | 3/8" | 0000000 | 00000 |
2 1/8" | 6 1/8" | Air, Oil | Steel | Nylon Plastic | Flange | Yes | 10 | 3/8" | 0000000 | 00000 |
2 1/8" | 6 1/8" | Air, Oil | Steel | Nylon Plastic | Flange | Yes | 40 | 3/8" | 0000000 | 00000 |

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 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 |

For Opening Dia. | Max. Flow Rate | Max. Temp., °F | Ht. | For Use With | Screen Material | Mount Type | Number of Bolt Holes | Bolts Included | Removes Particle Size Down To, microns | Each | |
Nylon Plastic Body | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Nylon Plastic Cap | |||||||||||
2" | Not Rated | 195° | 5 3/4" | Air, Oil | Nylon Plastic | Flange | 6 | Yes | 40 | 0000000 | 000000 |


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 3/4" | Air, Oil | Nylon Plastic | 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 Plastic | Flange | 6 | Yes | 10 | 00000000 | 00000 | 00000000 | 0000 |
2 1/8" | 190 | 150° | 6 1/8" | Air, Oil | Nylon Plastic | Flange | 6 | Yes | 40 | 0000000 | 00000 | 00000000 | 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 |
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.
Style C has a set screw to secure in place
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 | Opening 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 |
Slip On Female | |||||||||||
Zinc-Plated Steel Body and Fitting | |||||||||||
C | 1 | 1 1/2" | 2 1/2" | Air | Steel | Perforated Metal | __ | 1/8" | __ | 00000000 | 0000 |
C | 1 1/2 | 1 3/4" | 2 3/4" | Air | Steel | Perforated Metal | __ | 1/8" | __ | 00000000 | 0000 |
C | 1 1/4 | 1 1/2" | 2 1/2" | Air | Steel | Perforated Metal | __ | 1/8" | __ | 00000000 | 0000 |
C | 2 | 2 3/4" | 4" | Air | Steel | Perforated Metal | __ | 1/8" | __ | 00000000 | 00000 |
Diesel Fuel Tank Caps


Often used with trailers, compressors, and other equipment tanks, these caps meet Department of Transportation requirements. Caps have fusible plugs that will melt when the outside environment reaches their opening temperature.
Cap with vent will automatically open when the internal pressure reaches between 6.5 psi to 8.5 psi to relieve pressure.
Locking Fill Caps for Drums


Prevent tampering with the contents of your drum while allowing access for filling.
For technical drawings and 3-D models, click on a part number.