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316 Stainless steel body, spring & stem with Viton sealed seat
Temperature range -20ºC to 150ºC
Compact design brushing with 1/2" FPT connection
Reseats once pressure is relieved
Pop-off Pressure Relief
MDC's pop-off bushing is designed as low cost pressure safety
device to protect vacuum systems against over-pressurization during
back-fill or from an accidental increase in pressure due to a
system malfunction. The Pop-off pressure relief features stainless
steel constructed body, spring and stem with Viton seat. They are
designed for use in HV applications.
Most vacuum vessels are designed and constructed with internal
vacuum joints and welds that are rated for an external load of one
atmosphere. They are not pressure vessels and as such should not
be subjected to positive pressure loads in excess of one
atmosphere. For this purpose MDC has developed our new line
pop-off relief bushings to prevent the accidental pressurizing of a
vacuum vessel. MDC pop-off pressure relief bushings are offered
with NPT connections. They can be easily fitted to any vacuum system
where over pressurization is a concern.
MDC's pop-off pressure relief bushings have been engineered as a
low cost solution for relieving vacuum system pressure. They can
be adapted easily via a 1/2" NPT connection. As pressure inside a
vacuum vessel reaches 10 PSIG the spring loaded stem raises
allowing pressure to escape relieving pressure. Once over-pressure
is reduced below 10 PSIG the spring loaded stem will reseat itself
restoring the vacuum vessel to an operational condition.
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