Description
TA240-R Breather Valve
Hybrid Design for Medium-to-Large Transit Cases
Conforms to MIL-DTL-27166 & SAE AS27166
The TA240-R breather valve is a hybrid solution combining features of Arcadia Desiccant’s TA333-R and TA238 breather valves. It merges the thread size and hexagonal profile of the TA333-R with the screened cover and cost-effectiveness of the TA238-R. Designed for use in transit cases and similar enclosures up to 33 cubic feet in volume, it delivers a flow rate between 1.5 and 4.0 SCFM at 1.5 psid above the reseal pressure. Reseal settings are available from 0.5 psid to 5.0 psid.
This valve is lightweight, durable, tamper-resistant, and requires no field maintenance. It is constructed from corrosion-resistant materials and uses a silicone rubber valve seal. A recessed manual pressure release button is standard on all TA240-R units, allowing safe equalisation of pressure or vacuum to facilitate opening the enclosure.
Each valve is supplied with a gasket, washer, and hex nut. RFI/EMI shielding and mounting flanges are available. Custom desiccant cartridge integration is also possible for enhanced moisture control.
Important Note:
The TA240-R is not designed to withstand high-pressure water spray or hose-down conditions. For such requirements, please use the TA330, TA333, or TA770 breather valves.
Materials and Finish:
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Housing, Hex Nut & Washer: Aluminium alloy
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Gasket: Silicone rubber (compliant with ZZ-R-765)
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Finish: Housing – Black anodised; Washer & Nut – Clear anodised
Installation Details:
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Mounting Hardware: Supplied with gasket, washer, and hex nut
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Mounting Hole Diameter: 1.05 ± 0.015 in. (27 ± 0.38 mm)
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Maximum Wall Thickness: 0.61 in. (15 mm)*
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Installation Torque: 30–40 in-lbs (3.4–4.5 N·m)
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Weight: 0.02 lbs (32 grams)
*For wall thicknesses under 0.04 in. (1 mm), an additional washer may be required (Arcadia Desiccant P/N 300013-16, ordered separately).
Threaded Boss Installation:
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Thread Size: 3/4-14 NPSM
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Thread Relief Requirement: 1.05 ± 0.015 in. (27 ± 0.38 mm) diameter with a minimum counterbore depth of 0.08 in. (2 mm)
For guidance on NEMA and IP ratings, please contact Arcadia Desiccant‘s engineering team.
Further information
| Housing Material | Aluminium alloy |
|---|---|
| Gasket | Silicone rubber (compliant with ZZ-R-765) |
| Finish | Housing – Black Anodised; Washer & Nut – Clear Anodised |
| Mounting Hardware | Supplied with gasket, washer, and hex nut |
| Mounting Hole Diameter | 1.05 ± 0.015 in. (27 ± 0.38 mm) |
| Maximum Wall Thickness | 0.61 in. (15 mm)* |
| Installation Torque | 30-40 in-lbs (3.4-4.5 Nm) |
| Weight | 0.02 lbs (32 g) |
| Thread | 3/4-14 NPSM |
| Thread Relief | 1.05 ± 0.015 in. (27 ± 0.38 mm) diameter with a minimum counterbore depth of 0.08 in. (2 mm) |
| Reseal Pressure | 0.5 psid to 5.0 psid |
| Airflow | 1.5 to 4.0 SCFM at 1.5 psid above the reseal pressure |
Drawings available on request.
Request drawings
