Breather Valve TA333-R
SKU: TA333-R

Breather Valve TA333-R

Description

MEETS MIL-DTL-27166 & SAE AS27166

The TA333-R Breather Valve has separate and distinct settings for both pressure and vacuum relief. It has a flow rate that ranges from 1.5 to 4.0 SCFM at 1.5 psi above the valve reseal setting, making it suitable for containers and similar applications up to 33 cubic feet in volume. Standard settings are available from 0.25 psid to 3.0 psid reseal pressure. The lower the setting, the higher the flow rate.

The TA333-R Breather Valve is tamper-proof and requires no field maintenance. Corrosion-resistant materials are used throughout. The valve seal is made of silicone rubber. The spherical valve seat is Teflon coated for easy "break-away" action even after prolonged storage. The manual release push button is used to equalize the pressure or vacuum differentials in order to make opening the container easier. The button is recessed in the cover to protect it from damage and eliminate the possibility that an adjacent container might press the button and inadvertently cause the valve to remain open. A unique feature of the push button is a light duty spring under the cover, separating the button from the vacuum stem, which must be overcome before the button opens the valve.

Gasket, washer and hex nut are provided with each valve. A weldable nut is available for use as a threaded boss, or the valve may be used with our Mounting Flanges. RFI/EMI shielding is also available. For additional enclosure protection, AGM can develop a custom desiccant cartridge that mates with the valve. TA333-R Valves may be equipped with a rear-mounted High Flow Filter, which can also incorporate RFI/EMI shielding.

Cracking ("C") valves and reseal valves are mechanically and functionally identical, with the only distinction being their performance settings. Reseal valves are designed to meet the reseal and cracking pressure ranges outlined in the SAE AS27166 and MIL-DTL-27166 breather valve standards, while cracking valves are designed for customers seeking a nominal cracking pressure in standard increments, such as 0.25 psi, 0.5 psi, 1 psi, 2 psi, and so on. Since both types of valves are rated for both cracking and reseal pressures, simply select the valve with the settings that best suit your application, regardless of whether it is labeled as a cracking or reseal valve.

Note that whether you are specifying a reseal valve or a cracking valve, the flow rate at 1.5 psi above the reseal pressure is usually the most important parameter when selecting a valve: per SAE Specification AS27166, you should select a valve with a flow rate of at least 12% of the container volume per minute at a pressure less than the container ’s pressure rating. For instance, when choosing a valve for a container with a volume of 10 cubic feet that can withstand a pressure of 2 psi, the recommended valve would flow 1.2 standard cubic feet per minute (SCFM) at 2 psid or less pressure differential. While at first glance it may appear that a valve with a crack point of 2 psi would be appropriate for this application, remember that the flow rate at crack is very low (1 cc/min) and therefore would very likely not provide adequate pressure relief.

Flow rate versus pressure curves are available for some valves. Contact AGM’s Engineering Department if you require this information.

The TA333-R Breather Valve's unique cover and dust baffle provides superior protection from sand and dust intrusion.  Additionally, the cover makes this valve well suited for high-pressure hose down applications.  When compared to a screened valve such as AGM's TA238 Breather Valve as well as competitors' valves, the TA333-R Breather Valve allows virtually no water to pass when subjected to a high-pressure water stream.

In fact, the TA333-R Breather valve has been water jet tested per the IEC 60529 standard for IP ratings, and the testing shows that a TA333-R valve with a nominal cracking pressure rating of 0.5 psi or higher is suitable for use in an IPx6 rated container when the valve is closed (i.e., not breathing).

Additionally, the TA333-R Breather Valve has been tested to the NEMA 250 5.7 high-pressure hose down test, and a valve with a nominal cracking pressure rating of 1.0 psi or higher prevents all water entry when the valve is closed.

Contact AGM's Engineering department for more information.

Materials Housing, Hex Nut & Washer - Aluminum, Gasket - silicone per A-A-59588 Class II Grade 60
Finish Anodized
Mounting Requirements Gasket, washer & hex nut, provided with each valve*
Mounting Hole Diameter 1.05 ± 0.015 (27 ± 0.38 mm)
Maximum Wall Thickness 0.61 (15.5 mm)
Installation Torque 30-40 in. - lbs. (3.4-4.5 N•m)
Weight 0.10 lbs. (45 grams)

*A weldable nut is available for use as a threaded boss, or the valve may be used with our 658800 Mounting Flange.
Add extra washer(s) for wall thickness less than 0.063 (2 mm). (AGM P/N 300013-16, order separately.)
For threaded boss installation: 3/4-14 NPSM.

TA333-R Drawing

TA333-R Breather Valve Drawing

 


 

Two-Way Pressure and Vacuum Relief Valves

RESEAL VALVES

PRESSURE SIDE (FLOW OUT)
VACUUM SIDE (FLOW IN)
Dash No.
Reseal Pressure *
Flow Rate
Dash No.
Reseal Pressure *
Flow Rate *
-025
0.25 psid
3.0 SCFM @ 1.75 psid
-025
0.25 psid
4.0 SCFM @ 1.75 psid
-05
0.5 psid
3.0 SCFM @ 2.0 psid
-05
0.5 psid
4.0 SCFM @ 2.0 psid
-10
1.0 psid
2.5 SCFM @ 2.5 psid
-10
1.0 psid
3.5 SCFM @ 2.5 psid
-15
1.5 psid
2.0 SCFM @ 3.0 psid
-15
1.5 psid
3.0 SCFM @ 3.0 psid
-20
2.0 psid
2.0 SCFM @ 3.5 psid
-20
2.0 psid
3.0 SCFM @ 3.5 psid
-25
2.5 psid
1.5 SCFM @ 4.0 psid
-25
2.5 psid
2.5 SCFM @ 4.0 psid
-30
3.0 psid
1.5 SCFM @ 4.5 psid
-30
3.0 psid
2.5 SCFM @ 4.5 psid

*To convert psid to millibars, multiply by 69. To convert SCFM to liters/sec, multiply by 0.472.
Dash numbers for the Pressure and Vacuum sides may be used in any combination (i.e. TA333-05-15-R). AGM can also supply TA333-R Valves with other settings than those shown above. Please contact AGM for availability. Before making drawings of these valves, contact AGM for part numbers to be used.

 

CRACKING VALVES

PRESSURE SIDE (FLOW OUT)
VACUUM SIDE (FLOW IN)
Dash No.
Cracking Pressure *
Flow Rate *
Dash No.
Cracking Pressure *
Flow Rate *
-005C
0.05 ± 0.05 psid
2.0 SCFM @ 0.5 psid
-005C
0.05 ± 0.05 psid
1.5 SCFM @ 0.5 psid
-025C
0.25 ± 0.15 psid
3.5 SCFM @ 1.75 psid
-025
0.25 ± 0.15 psid
3.5 SCFM @ 1.75 psid
-05C
0.5 ± 0.2 psid
3.0 SCFM @ 2.0 psid
-05
0.5 ± 0.2 psid
4.0 SCFM @ 2.0 psid
-10C
1.0 ± 0.25 psid
3.0 SCFM @ 2.0 psid **
-10
1.0 ± 0.25 psid
4.0 SCFM @ 2.0 psid **
-15C
1.5 ± 0.25 psid
3.0 SCFM @ 3.0 psid
-15
1.5 ± 0.25 psid
3.0 SCFM @ 3.0 psid
-20C
2.0 ± 0.25 psid
2.0 SCFM @ 3.5 psid
-20
2.0 ± 0.25 psid
3.0 SCFM @ 3.5 psid
-25C
2.5 ± 0.3 psid
2.0 SCFM @ 4.0 psid
-25
2.5 ± 0.3 psid
2.0 SCFM @ 4.0 psid
-30C
3.0 ± 0.3 psid
1.5 SCFM @ 4.5 psid
-30
3.0 ± 0.3 psid
1.5 SCFM @ 4.5 psid

*To convert psid to millibars, multiply by 69. To convert SCFM to liters/sec, multiply by 0.472.
**Valves with -10C settings are rated for flow at 1.0 psi above the crack pressure, or 2.0 psid, instead of the usual 1.5 psi above crack pressure.
Dash numbers for the Pressure and Vacuum sides may be used in any combination (i.e. TA333-05C-15C-R). AGM can also supply TA333-R Valves with other settings than those shown above. Please contact AGM for availability. Before making drawings of these valves, contact AGM for part numbers to be used.

 


 

One-Way Pressure or Vacuum Relief Valves

While typically configured as a two-way valve, this valve can also be configured for one-way flow. Refer to the TA333-R Drawing for two-way performance settings, and select the setting for the direction you need. For example, part number TA333-P-30 is the one-way pressure relief version of part number TA333-30-30-R, while part number TA333-VR-30 is the one-way vacuum relief version. The vacuum relief version of the valve includes a manual release, but the pressure relief version does not. Contact AGM's Engineering department for assistance, if needed.

PRESSURE SIDE (FLOW OUT)
VACUUM SIDE (FLOW IN)
Dash No.
Reseal Pressure *
Flow Rate *
Dash No.
Reseal Pressure *
Flow Rate *
-P-025
0.25 psid
3.0 SCFM @ 1.75 psid
-VR-025
0.25 psid
4.0 SCFM @ 1.75 psid
-P-05
0.5 psid
3.0 SCFM @ 2.0 psid
-VR-05
0.5 psid
4.0 SCFM @ 2.0 psid
-P-10
1.0 psid
2.5 SCFM @ 2.5 psid
-VR-10
1.0 psid
3.5 SCFM @ 2.5 psid
-P-15
1.5 psid
2.0 SCFM @ 3.0 psid
-VR-15
1.5 psid
3.0 SCFM @ 3.0 psid
-P-20
2.0 psid
2.0 SCFM @ 3.5 psid
-VR-20
2.0 psid
3.0 SCFM @ 3.5 psid
-P-25
2.5 psid
1.5 SCFM @ 4.0 psid
-VR-25
2.5 psid
2.5 SCFM @ 4.0 psid
-P-30
3.0 psid
1.5 SCFM @ 4.5 psid
-VR-30
3.0 psid
2.5 SCFM @ 4.5 psid

*To convert psid to millibars, multiply by 69. To convert SCFM to liters/sec, multiply by 0.472.
Before making drawings of these valves, contact AGM for part numbers to be used.

Additional Information

Weight 0.1 lbs
Materials

Housing, Hex Nut & Washer-Aluminum, Gasket-Silicone per A-A-59588, Class II Grade 60

Mounting Hole Diameter

1.05 ± 0.015 (27 ± 0.38 mm)

Maximum Wall Thickness

0.61 (15.5 mm)

Installation Torque

0-40 in. – lbs. (3.4-4.5 N•m)

Mounting Requirements

Gasket, Washer, Hex Nut are provided with each valve

Finish

Clear Anodized

Complies With

MIL-DTL-27166, SAE AS27166