- #1
chemisthypnos
- 31
- 10
How do hydrogen powered cars prevent the permeation of hydrogen through the valve used to fill the car's tank with hydrogen? Is a regular check valve used or is the valve special in some way?
That's a design detail that may vary. I can tell you this though; my large neighborhood propane tanks use a type of Schrader valve using a ball bearing instead of a center post. It acts as a check valve, with the pressure and a spring popping it into place as soon as the fill hose is removed. I see no reason why this wouldn't work for H2...How do hydrogen powered cars prevent the permeation of hydrogen through the valve used to fill the car's tank with hydrogen? Is a regular check valve used or is the valve special in some way?