Abstract: An improved valve for separating and sealing adjacent pneumatic tube sections of a pneumatic tube delivery system. The valve includes a pair of flap seals positioned on opposite sides of the travel path of a carrier through the valve. Each flap seal is spring biased closed, and has a shock absorbing element positioned behind it such that when the flap seal is kicked open by a carrier, the spring bias and the shock absorber will absorb the momentum of the kicked open flap seal. An air inlet section in the valve is designed to minimize the intake of rain and snow and further to minimize the coasting distance experienced by a carrier traveling through the valve.