Abstract: A valve control system comprises a programmable electronic controller. The programmable electronic controller is configured to provide an emergency actuation signal to a motor upon receiving an emergency close signal. The programmable electronic controller is configured to provide a test actuation signal to the motor upon receiving a test close signal. The valve control system further comprises a gas detection input configured to receive a gas detection signal. Receipt of the gas detection signal at least partially meeting a first criterion causes the emergency close signal to be supplied to the controller. The valve control system further comprises a user interface configured to provide the controller with the test close signal in response to a user input. The valve control system further comprises a low battery input configured to receive a low battery signal. Receipt of the low battery signal causes the emergency close signal to be supplied to the controller.

Abstract: A mixture consisting essentially of dry trichloroisocyanuric acid, dry surfactant particles, and bulking agents is disclosed. The mixture serves as a quickly dissolving chlorine release mixture used in shock treatment of substantial bodies of water. The surfactant is provided to wet the trichloroisocyanuric acid particles and facilitate their quick solution into the water.

Abstract: An artificial composite flammable firelog of generally pie segment shaped transverse cross section configuration including perpendicular flat sides interconnected by a convex third side. The log is preferably formed of a wax and wood particle composite. It may include fire retardant on the flat sides for selective burning on the curved side which faces the fireplace opening. At least two of such firelogs may be extruded simultaneously by use of a unique die member. Four such firelogs are conveniently packed in a rectangular box.

Abstract: A flexible dispensing tube is disclosed having a laminated plastic-metal-plastic wall, the metal layer having at least one irregular surface for improved deadfold at the folded bottom end.