Honeywell Gas Valve Replacement Chart. Direct burner ignition for applications utilizing pilotless ignition controls such as hot surface and direct spark for burner ignition. Replace over 2000 gas valves for standing pilot and electronic ignition applications.

Fuel (liquid hydrogen) and oxidizer (liquid oxygen) from the space shuttle's external tank entered the orbiter at the umbilical disconnect valves and from there flowed through the orbiter's main propulsion system (mps) feed lines; Replace over 2000 gas valves for standing pilot and electronic ignition applications. Direct burner ignition for applications utilizing pilotless ignition controls such as hot surface and direct spark for burner ignition.