What are some common gas appliance fittings?

Pipeline gas shut-off valve: Installed at the end of the pipeline, it features automatic shut-off in response to low pressure, overpressure, and excessive flow, thereby preventing leaks.

　　1. Security Control Category (Core Protection)

　　Pipeline gas shut-off valve: Installed at the end of the pipeline, it features automatic shut-off in response to low pressure, overpressure, and excessive flow, thereby preventing leaks.

　　Pressure regulator: Primarily used with bottled liquefied petroleum gas to reduce high-pressure gas to a stable low pressure; commonly available in two types—those with a pressure gauge and those without.

　　Solenoid valve/flame-out protection device: A built-in component of the stove that automatically shuts off the gas supply if the flame is accidentally extinguished, equipped with either a thermocouple or an ionization sensing probe.

　　Gas detector: Monitors the concentration of combustible gas in the air and triggers an alarm when the threshold is exceeded; it can also automatically activate a shut-off valve.

　　2. Connection and Conveyance Type (Pipeline Interface)

　　Metal‑sheathed flexible hose/stainless steel corrugated pipe: connects piping to cooking appliances, replacing traditional rubber hoses; resistant to rodent bites, withstands high temperatures, and boasts a long service life, meeting the requirements of the new national standard.

　　Gas‑specific fittings include union tees, elbows, couplers, and adapter fittings (such as female‑to‑male adapters), typically made of brass or 304 stainless steel.

　　Ball valves/angle valves: Used for on/off control in pipelines, requiring full-bore design and high flow capacity to ensure rapid shut-off in emergency situations.

　　3. Cooking appliance combustion type (repair and replacement)

　　Burner head and flame distributor (gas diffuser): The core combustion components, typically made of solid brass or cast iron, responsible for mixing and atomizing the gas.

　　Ignition and detection electrodes: The ignition electrode generates an electric spark, while the detection electrode monitors the flame status; carbon buildup or damage can prevent ignition.

　　Pot stand and wind shield: support cookware, concentrate the flame, and block the wind to enhance thermal efficiency.

　　Knob and valve body: Control the flame intensity and on/off function; must match the hole diameter (e.g., 8 mm) and angle.

　　4. Water Heater–Specific Category

　　Flue pipes and accessories: including stainless steel flue pipes, elbows, and check valves, used for the exhaust gas discharge of forced‑ventilation water heaters.

　　Pressure switch: Monitors exhaust resistance to ensure combustion safety.