Dryer gas burner valve solenoid set. If the dryer does not heat or heats intermittently the coils could be defective. To test, watch the burner and if the igniter glows for a while and then shuts off without the gas igniting, it usually means one of these coils is bad.
Dryer gas valve conversion kit from Natural gas to LP (liquid propane) & Butane.
Dryer gas burner kit with igniter
Gas oven dual safety valve
Inverted tubing nut