Drain valve

A lightning-protected fuel drain valve of the type having means forming a non-conductive plastic housing connectable to a fuel tank and having a port opening exteriorly of said housing and said fuel tank, a non-conductive plastic valve member guided for movement along an axis extending through said housing and said port between a first position wherein a lower end portion thereof closes said port and a second position wherein said lower end portion is raised to open said port, bias means operatively engaged with said valve member to bias said valve member in a direction along said axis that would extend said valve member downwardly of said port and said housing, cooperating stop means connected with said valve member for movement therewith and first abutment means fixed relative to said housing for preventing said valve member from passing downwardly out of said port, second abutment means fixed to said housing in confronting relation to said first abutment means and cooperating with said stop means for preventing said valve member from moving upwardly along said axis by a distance sufficient that said outer end portion moves away from said port to open the same unless said valve member is first rotated about said axis to maintain said valve member in a port-closed position in the event of a lightning strike, said bias means comprising a combined compression and torsion spring that torsionally biases said valve member into a position wherein said stop means is in interfering alignment with said first abutment means and in alignment with said second abutment means, and further abutment means cooperating with said stop means for preventing said torsion spring from unwinding when said valve member is in the port-closed position or a port-open position.