The TA770-R Breather Valve has separate and distinct settings for both pressure and vacuum relief.  It has a flow rate of 10.0 to 25.0 scfm at 1.5 psi above the valve setting, making it suitable for large containers and similar applications up to 208 cubic feet in volume.  Standard settings range from 0.5 psid to 3.0 psid reseal pressure.  The lower the setting, the higher the flow rate.

The TA770 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.

A gasket, washer and hex nut for mounting are provided with each valve.  RFI/EMI shielding is also available.

The TA770 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 TA770 Breather Valve allows virtually no water to pass when subjected to a high-pressure water stream.  The TA770 Breather Valve has been tested to the NEMA 250 5.7 high-pressure hose down test; contact AGM's Engineering department for more information.

Materials and Finish: Housing, nut and washer are aluminum. Housing and nut are anodized and washer is alodine conversion-coated. Gasket material is per ZZ-R-765, Class II, Grade 60. Torque value for installation: 80 in. - lbs. (9.0 N•m)  Weight: 0.40 lbs. (181 grams)

Mounting Requirements: A gasket, washer and hex nut for mounting are provided with each valve.
Mounting hole diameter: 2.020 ± 0.020 (51 ± 0.50 mm)
Installation torque: 80-90 in. - lbs. (9.0-10.0 N•m)
Maximum wall thickness: 0.85 (22 mm)
Minimum wall thickness: 0.001 (0.03 mm)
For threaded boss installation: 2.00-18 UNS-2B; 2.020 ± 0.020 (51 ± 0.50 mm) diameter X 0.085 (2 mm) minimum deep counterbore required for thread relief.

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