Breather Valve TA238

Meets SAE Specification AS27166 & MIL-DTL-27166
AGM’s TA238 Breather Valve is for use on transit cases and similar applications up to 33 cubic feet in volume. It has a flow rate of 4.0 scfm.

The TA238 Breather Valve fills the need for a low cost, but higher flow valve than the TA294-R Breather Valve. The valve can be used on transit cases and similar applications up to 33 cubic feet in volume. It has a flow rate of 4.0 scfm and is available in settings from 0.5 psi to 5.0 psi.

The valve is lightweight, rugged, tamper-proof and requires no field maintenance. Corrosion-resistant materials are used throughout. The valve seal is made of silicone rubber. A recessed manual release push button is standard on all TA238 Breather Valves. It is used to equalize residual pressure or vacuum differentials in order to open the container.

The TA238 Breather Valve will not provide protection against water intrusion from a high-pressure hose down. Use a TA330, TA333 or TA770 Breather Valve for applications where this is required.

The valve is identical in dimensions, materials and performance to the Zero ZSP6-037 Breather Valve. An o-ring gasket and hex nut are provided with each valve. RFI/EMI shielding is available.

Materials Housing & Hex Nut - Aluminum, O-Ring - per MS28775-120
Finish Black anodize
Mounting Requirements O-Ring & hex nut, provided with each valve
Mounting Hole Diameter 1.020 ± 0.015 (26 ± 0.38 mm)
Maximum Wall Thickness 0.375 (10 mm)
Installation Torque 30-40 in. - lbs. (3.4-4.5 N•m)
Weight 0.065 lbs. (30 grams)

Add washer(s) for wall thickness less than 0.110 (3 mm). (AGM P/N 300013-16, order separately.)
For threaded boss installation: 1.00-20 UNEF-2B; 1.020 ± 0.015 (26 ± 0.38 mm) diameter X 0.110 (3 mm) minimum deep counterbore required for thread relief.

Contact AGM's Engineering department for information on NEMA and IP ratings.

TA238 Drawing

TA238 Two-Way Pressure & Vacuum Relief Breather Valve with Recessed Manual Release Push Button drawing




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 TA238-R drawing for two-way performance settings, and select the setting for the direction you need. For example, part number TA238-P-30 is the one-way pressure relief version of part number TA238-30-30-R, while part number TA238-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.
Cracking Pressure*
Reseal Pressure*
Flow Rate*
Dash No.
Cracking Pressure*
Reseal Pressure*
Flow Rate*
-P-025
0.25-0.75 psid
0.25 psid
3.0 scfm† @ 1.75 psid
-VR-025
0.25-0.75 psid
0.25 psid
4.0 scfm† @ 1.75 psid
-P-05
0.50-1.00 psid
0.50 psid
4.0 scfm† @ 2.0 psid
-VR-05
0.50-1.00 psid
0.50 psid
4.0 scfm† @ 2.0 psid
-P-10
1.00-1.70 psid
1.00 psid
2.5 scfm† @ 2.5 psid
-VR-10
1.00-1.70 psid
1.00 psid
2.5 scfm† @ 2.5 psid
-P-15
1.50-2.25 psid
1.50 psid
4.0 scfm† @ 3.0 psid
-VR-15
1.50-2.25 psid
1.50 psid
4.0 scfm† @ 3.0 psid
-P-20
2.00-3.00 psid
2.00 psid
2.0 scfm† @ 3.5 psid
-VR-20
2.00-3.00 psid
2.00 psid
2.0 scfm† @ 3.5 psid
-P-25
2.50-3.50 psid
2.50 psid
2.5 scfm† @ 4.0 psid
-VR-25
2.50-3.50 psid
2.50 psid
4.0 scfm† @ 4.0 psid
-P-30
3.00-4.00 psid
3.00 psid
2.0 scfm† @ 4.5 psid
-VR-30
3.00-4.00 psid
3.00 psid
2.0 scfm† @ 4.5 psid

*To convert to metric equivalent (millibars) multiply by 69.
†To convert metric equivalent (liters/sec) multiply by 0.472
Before making drawings of these valves, contact AGM for part numbers to be used.




Two-Way Pressure and Vacuum Relief Valves

Vacuum (PSID)* Cracking
Pressure (PSID)* Cracking
Flow Rate 4 SCFM @ PSID*
Part No.
V
P
Max.
Min.
Reseal
Max.
Min.
Reseal
Vacuum
Pressure
TA238-037-1
.5
.5
.8
.4
.2
.8
.4
.2
1.50
1.50
TA238-037-3
1.5
1.5
1.9
1.0
.8
1.9
1.0
.8
2.90
2.90
TA238-037-4
3.5
2.5
4.0
2.4
2.0
3.0
1.7
1.4
5.10
5.00
TA238-037-6
.5
2.5
.8
.4
.2
3.0
1.7
1.4
1.50
5.00

*To convert to metric equivalent (millibars) multiply by 69.
†To convert metric equivalent (liters/sec) multiply by 0.472
AGM can also supply TA238 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.