We polished the drilling hole,more smooth
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Pressure relief valves, as the name suggests, relieve interior tank pressure when it rises above the 14.7 PSI (1 atmosphere). Used for low pressure system. A pressure vacuum valve prevents the interior pressure from going below -1.5 PSI and thus potentially imploding the tank. Situations where this may occur is during a quick cool down, such as after a cleaning process, or when draining quickly. For protection of tanks against over-pressure or vacuum.
Vacuum fixed at -1-1.5 PSI
100% Stainless Steel SS304
Fixed at 14.7-30 PSI
1"-1.5''-2" Tri Clamp fitting
All Springs SS304
FPM seals, food grade
30 days on seals. All valves require periodic maintenance