TA790 High Flow Valve is intended for applications requiring the moving of
large amounts of air in short periods of time, automatically. The
TA790 offers both pressure and vacuum relief at an opening point
of 0.50 psi ± 0.25
psi in both directions. Rapid decompression, or explosive
decompression, is becoming a more common requirement for airborne
military packages. This
requirement has presented a very difficult design challenge. One
solution to this requirement has been the use of rupture disks
which require replacement if used or if accidentally over-pressurized.
With a flow rate of up to 140 SCFM, the TA790 will provide for
the rapid decompression needs of a 50 ft.³ container that
experiences a loss of pressurization from 10.1 psia (altitude of
10,000 ft.), a typical cargo hold pressure, to 2.7 psia, the external
ambient pressure at 40,000 ft., in a 15 second time period.
transport of large volume containers, even without a rapid decompression
requirement, need to move large volumes of air to keep from exploding
or imploding due to atmospheric pressure changes with altitude. SAE AS27166
recommends that valves should have a flow capacity of
12% of the container volume. Applied to the TA790 High Flow Valve,
this means a container of over 1,100 ft.³ can be protected
with a single valve.
The manual release button ensures easy entry into the enclosure
when it is under vacuum conditions and safe opening when the container
is pressurized. The attached retaining clip guarantees the
button is only used when intended. The lanyard makes losing
the retaining clip impossible. The valve is low profile,
projecting only 1.25" from the container
wall to the tip of the manual release button. Installation into
container walls up to .40" thick is simple.
Materials and Finish: Housing, nut and washer are aluminum alloy
with black anodize finish. Gasket is neoprene. Weight:
1.21 lbs. (550 grams)