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Manual Relief Valve TA327


A medium-sized "turn-to-open" Manual Relief Valve with a recessed captive screw that must be rotated 1 or 2 turns with a screwdriver or coin to open the valve. It has a safety wire feature. The TA327 Pressure Relief Valve meets the requirement on Nav Buweps Drawing No. 1296841. The valve can be mounted through a 0.51 inch (13 mm) diameter hole.

Part No. TA328, without the hex nut, installs in a 0.500-20 UNF-2B threaded boss.

MaterialsHousing - Aluminum
FinishHousing - Anodize
Mounting RequirementsNut & gasket, provided with each valve
Mounting Hole Diameter0.51 ± 0.01 (13 ± 0.25 mm)
Installation Torque30-40 in. - lbs. (3.4-4.5 N•m)
Maximum Wall Thickness0.18 (5 mm)
Weight0.053 lbs. (24 grams)

Add washer for wall thickness less than 0.052 (1.3 mm). (P/N MS15795-855, order separately.)
For threaded boss installation: 0.500-20 UNF-2A; 0.51 ± 0.01 (13 ± 0.25 mm) diameter X 0.052 (1.3 mm) minimum deep counterbore required for thread relief. Part No. TA328 comes without hex nut.

The TA327 is appropriate for use on NEMA 1, 2, 3, 3R, 3S, 4, 5, 6, 12, 12K, and 13 enclosures, as well as IP65/IP67 enclosures. This item may also be appropriate for use on other NEMA or IP enclosures, depending upon the application. Contact AGM's Engineering department for more information.

Manual Relief Valve TA327 drawing

Additional information


Housing-Aluminum Alloy



Mounting Requirements

Hex Nut & Gasket are provided with each valve

Mounting Hole Diameter

0.51 ± 0.01 (13 ± 0.25 mm)

Maximum Wall Thickness

0.18 in. (5 mm)

Installation Torque

30-40in. - lbs. (3.4-4.5 N•m)


0.053 lbs. (24 grams)

AGM Container Controls, Inc.
3526 E. Fort Lowell Rd.
Tucson, AZ 85716

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