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Preventing leakage of fugitive emissions

The Series 56000 PIN-TECH pressure relief vent are the perfect solution for bubble tight applications (< 500 ppm). Protectoseal has designed and tested this series to address concerns about the leakage of fugitive emissions prior to set point.

Closed, bubble-tight position

PIN-TECH vents are mounted to the vapour space flange connection of a storage tank or vessel. The vents utilize a unique technology that employs a buckling pin. The pin holds the vent piston closed with zero leakage up to the relief set point. The pin is an accurately machined, straight metal rod. It is configured to precisely sense transmitted axial forces that are generated as a result of tank pressure.

The force required to buckle the pin is governed by Euler’s Law. It is a function of the pin’s metallurgy, length and diameter. An exact buckling force can be determined for any specific pin configuration.

Open, full flow position

When the pressure in the tank reaches the vent set point, the axial force is sufficient to buckle the pin. The vent sealing piston is allowed to move to its full open, relieving position. The pin buckles completely and instantaneously.

Depending on the vent size and its set point, there may be sufficient pin-buckling force to use a direct-acting PIN-TECH. If not, then a diaphragm-assisted unit is required.