Independent testing by the Southern Research Institute, in conjunction with the Environmental Protection Agency (EPA), has verified that Pin-Tech pressure/vacuum relief vents, manufactured by The Protectoseal Co, allow “no detectable” emissions from low-pressure storage tanks that contain volatile organic compounds. Under normal operating conditions, Pin-Tech vents maintain a “bubble-tight” seal that controls leakage of greenhouse gases to a level well below the EPA standard of 500 parts per million (ppm).
Pin-Tech remains bubble-tight until tank pressure reaches the set point, then opens fully — within a fraction of a second — to relieve pressure. It is reliable because a precision-made buckling pin controls the set point. Below the set point, an elastomeric O-ring provides the vapor seal.
For full details, contact Protectoseal, 225 W Foster Ave, Bensenville IL 60106-1690.