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About Noise, Filtration, and Flow Ratings
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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.
| 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 | 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 |
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.
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.
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.
For technical drawings and 3-D models, click on a part number.
| Style | Pipe Size | Max. Flow Rate | Max. Pressure, psi | Max. Temp., °F | Ht. | Dia. | For Use With | Removes Particle Size Down To, microns | Features | Each | |
NPT Male | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Nylon Plastic Body and Fitting Nylon Plastic Fitting | |||||||||||
| C | 1/4 | Not Rated | Not Rated | 210° | 1 9/16" | 1 11/16" | Air, Oil | 40 | Splash Guard | 0000000 | 00000 |
| 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 |
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.
Vents with barbed connections fit unthreaded openings and are held in place by friction.
For technical drawings and 3-D models, click on a part number.
| Thread Size | For Hole Size | Max. Pressure, psi | Max. Temp., °F | Ht. | Dia. | For Use With | O-Ring Material | Removes Particle Size Down To, microns | Features | Each | |
Threaded Metric Male | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Nylon Plastic Body and Fitting | |||||||||||
| M3 | __ | 1.4 | 158° | 3/8" | 5/16" | Air | __ | 3 | __ | 0000000 | 000000 |
Polycarbonate Plastic Body and Fitting | |||||||||||
| M16 | __ | 1.4 | 158° | 15/16" | 1 1/16" | Air | Buna-N Rubber | 3 | Mounting Nut | 0000000 | 00000 |
Barbed Male | |||||||||||
ABS Plastic Body and Fitting | |||||||||||
| __ | 21/64" | 4 | 158° | 9/16" | 7/8" | Air | Silicone Rubber | 1 | __ | 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.
Polyethylene breather vents can be cleaned with mineral spirits.
For technical drawings and 3-D models, click on a part number.
| Pipe Size | Max. Flow Rate | Max. Pressure, psi | Max. Temp., °F | Ht. | Dia. | For Use With | Removes Particle Size Down To, microns | Each | |
NPT Male | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Polyethylene Plastic 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 |
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 technical drawings and 3-D models, click on a part number.
| Pipe Size | For Tank Capacity, gal. | Max. Flow Rate | Max. Temp., °F | Ht. | Dia. | For Use With | Removes Particle Size Down To, microns | Each | |
Nylon and Polycarbonate Plastic Body and Nylon Plastic Fitting | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 | 00000 |
| 1 | 5-500 | 16 scfm @ 1 psi | 200° | 10 1/8" | 4 1/8" | Air, Inert Gas | 3 | 0000000 | 000000 |
| Pipe Size | For Tank Capacity, gal. | Max. Flow Rate | Max. Temp., °F | Ht. | Dia. | For Use With | Removes Particle Size Down To, microns | Each | |
Nylon and Polycarbonate Plastic Body and Nylon Plastic Fitting | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 |
Submersible Threaded Breather Vents
Use these vents to maintain consistent pressure as temperatures fluctuate by allowing air to flow through sealed enclosures. All have a hydrophobic and oleophobic filter membrane that blocks moisture and contamination from particle buildup.
Nylon vents don’t conduct electricity, making them a good choice for most environments.
Polycarbonate vents don’t conduct electricity and withstand UV rays better than nylon vents, so they won’t break down as quickly in outdoor applications. All have a mounting nut for a secure connection in threaded as well as through holes.
For technical drawings and 3-D models, click on a part number.
| Pipe Size | Thread Size | Thread Pitch, mm | For Hole Dia. | Head Dia. | Environment | Environmental Rating | Specifications Met | Color | Features | Each | |
NPT | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Nylon Plastic | |||||||||||
| 1/4 | __ | __ | 9/16" | 11/16" | Corrosive, Damp, Dusty, Outdoor, Submersible, Washdown | IP68, IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 0000000 | 00000 |
| 3/8 | __ | __ | 11/16" | 7/8" | Corrosive, Damp, Dusty, Outdoor, Submersible, Washdown | IP68, IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 000000 | 0000 |
| 1/2 | __ | __ | 7/8" | 1 1/16" | Corrosive, Damp, Dusty, Outdoor, Submersible, Washdown | IP68, IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 00000000 | 0000 |
| 3/4 | __ | __ | 1 1/16" | 1 7/16" | Corrosive, Damp, Dusty, Outdoor, Washdown | IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 00000000 | 0000 |
Metric | |||||||||||
Nylon Plastic | |||||||||||
| __ | M12 | 1.5 | 1/2" | 11/16" | Corrosive, Damp, Dusty, Outdoor, Submersible, Washdown | IP68, IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 00000000 | 0000 |
| __ | M16 | 1.5 | 5/8" | 7/8" | Corrosive, Damp, Dusty, Outdoor, Submersible, Washdown | IP68, IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 0000000 | 0000 |
| __ | M20 | 1.5 | 13/16" | 1 1/16" | Corrosive, Damp, Dusty, Outdoor, Submersible, Washdown | IP68, IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 0000000 | 0000 |
Polycarbonate Plastic | |||||||||||
| __ | M5 | 0.8 | 3/16" | 1/2" | Dusty, Submersible | IP67 | __ | Black | Gasket, Mounting Nut | 0000000 | 0000 |
| __ | M6 | 1 | 1/4" | 1/2" | Dusty, Submersible | IP67 | __ | Black | Gasket, Mounting Nut | 0000000 | 0000 |
| __ | M8 | 1 | 5/16" | 9/16" | Dusty, Submersible | IP67 | __ | Black | Gasket, Mounting Nut | 0000000 | 00000 |
| __ | M10 | 1 | 3/8" | 9/16" | Dusty, Submersible | IP67 | __ | Black | Gasket, Mounting Nut | 0000000 | 00000 |
| __ | M12 | 1.5 | 1/2" | 11/16" | Dusty, Submersible | IP67 | __ | Black | Gasket, Mounting Nut | 0000000 | 00000 |
| __ | M16 | 1.5 | 5/8" | 15/16" | Dusty, Submersible | IP67 | __ | Black | Gasket, Mounting Nut | 0000000 | 00000 |
| __ | M18 | 1.5 | 11/16" | 15/16" | Dusty, Submersible | IP67 | __ | Black | Gasket, Mounting Nut | 0000000 | 00000 |
| __ | M32 | 1.5 | 1 1/4" | 2 15/16" | Dusty, Submersible | IP67 | __ | Black | Gasket, Mounting Nut | 0000000 | 00000 |
PG | |||||||||||
Nylon Plastic | |||||||||||
| __ | PG-7 | __ | 1/2" | 3/4" | Corrosive, Damp, Dusty, Outdoor, Submersible, Washdown | IP68, IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 00000000 | 0000 |
| __ | PG-9 | __ | 1/2" | 7/8" | Corrosive, Damp, Dusty, Outdoor, Submersible, Washdown | IP68, IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 00000000 | 0000 |
| __ | PG-13.5 | __ | 5/8" | 1 1/8" | Corrosive, Damp, Dusty, Outdoor, Submersible, Washdown | IP68, IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 00000000 | 0000 |
| __ | PG-21 | __ | 3/4" | 1 7/16" | Corrosive, Damp, Dusty, Outdoor, Submersible, Washdown | IP68, IP65, NEMA 4X | UL 94 V-2, UL Recognized Component | Gray | Gasket | 00000000 | 0000 |
Corrosion-Resistant Washdown Threaded Breather Vents
Rated NEMA 4X, these vents provide protection from washdowns, corrosion, and power jets of water. Use them to maintain consistent pressure as temperatures fluctuate by allowing air to flow through sealed enclosures.
For technical drawings and 3-D models, click on a part number.
Submersible Snap-In Breather Vents
No threaded hole or tools needed—snap these vents into enclosures with a maximum 1/8” panel thickness to let airflow in and keep water out even when submerged. Use them to maintain consistent pressure inside your enclosure as temperatures change. These vents have a pressure compensating seal that prevents pressure buildup. They also have an acrylic filter that resists dust, water, and oil.
For technical drawings and 3-D models, click on a part number.
| For Hole Diameter | Head Diameter | For Maximum Panel Thickness | Temperature Range, °F | Environmental Rating | Material | Specifications Met | Color | Each | |
| 1/2" | 1/2" | 1/8" | -40° to 220° | NEMA 4X; IP68 | Nylon Plastic | UL Recognized Component | Black | 00000000 | 00000 |
| 7/8" | 7/8" | 1/8" | -40° to 220° | NEMA 4X; IP68 | Nylon Plastic | UL Recognized Component | Black | 00000000 | 0000 |
| 1 1/8" | 1 1/8" | 1/8" | -40° to 220° | NEMA 4X; IP68 | Nylon Plastic | UL Recognized Component | Black | 00000000 | 0000 |
Snap-In Breather Vents
These vents have louvers with foam filters to keep out dust and liquids. Use them to maintain consistent pressure as temperatures fluctuate by allowing air to flow through sealed enclosures.
For Knockout | ||||||||
|---|---|---|---|---|---|---|---|---|
| Trade Size | Dia. | Head Dia. | For Max. Panel Thick. | Material | Color | Specifications Met | Each | |
| __ | 1" | 1 1/4" | 1/8" | Nylon Plastic | Black | UL 94 V-2 | 0000000 | 00000 |
| __ | 1 1/2" | 1 11/16" | 1/8" | Nylon Plastic | Black | UL 94 V-2 | 000000 | 0000 |
| 1/2 | 7/8" | 1" | 1/8" | Nylon Plastic | Black | UL 94 V-2 | 000000 | 0000 |
| 3/4 | 1 1/8" | 1 1/4" | 1/8" | Nylon Plastic | Black | UL 94 V-2 | 000000 | 0000 |
| 1 | 1 3/8" | 1 1/2" | 1/8" | Nylon Plastic | Black | UL 94 V-2 | 000000 | 0000 |
| 1 1/2 | 2" | 2 3/16" | 1/8" | Nylon Plastic | Black | UL 94 V-2 | 0000000 | 0000 |
| 2 | 2 1/2" | 2 3/4" | 1/4" | Nylon Plastic | Black | UL 94 V-2 | 0000000 | 00000 |
| 2 1/2 | 3" | 3 3/16" | 1/4" | Nylon Plastic | Black | UL 94 V-2 | 0000000 | 00000 |
Wet Location Breather Vents
These vents maintain air pressure inside enclosures that may be exposed to indoor and outdoor temperature changes while keeping dust and water out. They have a PTFE seal that stands up to oil and corrosion and allows airflow in, reducing the risk of the seal failing due to changes in air pressure. They also minimize condensation that may rust internal electronic components. Made of polycarbonate, these vents withstand corrosion and UV rays.
For technical drawings and 3-D models, click on a part number.