Description
TA238-R Breather Valve
High-Flow, Low-Cost Relief Valve for Larger Transit Cases
Conforms to MIL-DTL-27166 & SAE AS27166
The TA238-R breather valve is designed to offer a higher airflow alternative to the TA294-R, while maintaining a cost-effective profile. Suitable for transit cases and similar enclosures with internal volumes up to 33 cubic feet, this valve provides a flow rate of 4.0 SCFM and is available with reseal pressure settings ranging from 0.5 psi to 5.0 psi.
Lightweight, robust, and tamper-resistant, the TA238-R requires no field maintenance. It is manufactured entirely from corrosion-resistant materials, with a silicone rubber valve seal for reliable performance. A recessed manual release push button is included as standard, allowing for pressure equalisation to aid in opening the container when residual pressure or vacuum is present.
Note:
The TA238-R is not intended for protection against water ingress from high-pressure water jets or hose-down conditions. For such applications, consider using the TA330, TA333, or TA770 breather valves.
This valve is identical in size, construction, and performance to the Zero ZSP6-037 breather valve. Each unit is supplied with an O-ring gasket and hex nut. RFI/EMI shielding options are available upon request.
Materials and Finish:
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Housing & Hex Nut: Aluminium
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O-Ring: In accordance with MS28775-120
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Finish: Black anodised
Installation Details:
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Mounting Hardware: O-ring and hex nut included
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Mounting Hole Diameter: 1.020 ± 0.015 in. (26 ± 0.38 mm)
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Maximum Wall Thickness: 0.375 in. (10 mm)
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Installation Torque: 30–40 in-lbs (3.4–4.5 N·m)
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Weight: 0.065 lbs (30 grams)
Note: For wall thicknesses under 0.110 in. (3 mm), additional washers may be required (Arcadia Desiccant P/N 300013-16, ordered separately).
Threaded Boss Installation:
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Thread Size: 1.00-20 UNEF-2B
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Thread Relief Requirement: 1.020 ± 0.015 in. (26 ± 0.38 mm) diameter × 0.110 in. (3 mm) minimum depth counterbore
For information regarding enclosure compatibility (NEMA and IP ratings), please contact Arcadia Desiccant’s engineering team.
Further information
| Housing Material | Aluminium |
|---|---|
| O-ring | In accordance with MS28775-120 |
| Finish | Black Anodised |
| Mounting Hardware | O-ring and hex nut included |
| Mounting Hole Diameter | 1.020 ± 0.015 in. (26 ± 0.38 mm) |
| Maximum Wall Thickness | 0.375 in. (10 mm) |
| Installation Torque | 30-40 in-lbs (3.4-4.5 Nm) |
| Weight | 0.065 lbs (30 g) |
| Thread | 1.00-20 UNEF-2B |
| Thread Relief | 1.020 ± 0.015 in. (26 ± 0.38 mm) diameter x 0.110 in. (3 mm) minimum depth counterbore |
| Reseal Pressure | 0.5 psi to 5.0 psi |
| Airflow | 4.0 SCFM |
Drawings available on request.
Request drawings
