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AIR VENTS, PRESSURE RELIEF VALVES ETC.
AA-96 Pressure Relief Valve
Uses
The Waterman Model AA-96 may be used for pressure relief on any pipeline
with operating pressures up to 150 PSI where a large volume discharge
is needed. The AA-96 meets the requirements of the Natural Resource Conservation
Service specifications and has a larger orifice that is a feature not
found on most other makes.
Features
The Model AA-96 is available in three configurations, each filling a specific
customer need. The AA-96A has a pressure discharge setting that is factory
set for convenience and accuracy. The model AA-96B is designed to be set
in the field utilizing actual pipeline pressure. The model AA-96C is factory
preset, and includes an aluminum spring housing which protects the top
mounted spring from weather and also discourages tampering. Automatic
operation is provided by specially manufactured springs that are engineered
to provide a high degree of sensitivity and provide maximum discharge.
Materials have been selected to provide long life, minimize maintenance
and provide "fail-safe" performance. A Teflon seal face and
bushing prevent sticking, even after long periods of exposure to sunlight
and heat. A rubber composition seal backing is cloth inserted to prevent
seal "blow-out" or creep. The threaded base is high strength
cast iron to eliminate thread galling or "freezing" which may
occur with aluminum threads. Spring retainer is aluminum and cover is
high strength cast iron. Guide rod and all fasteners are stainless steel.
Galvanized or plated hardware is never used.
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