What is the difference between a low pressure valve and a pressure reducing valve?

The high pressure valve and the low pressure valve are collectively referred to as the pressure reducing valve. The difference is that the high pressure valve output pressure has a high flow rate (the output pressure is adjustable, the thimble screwing pressure is high, and vice versa is low), and the low pressure valve output pressure is low.
Low Pressure Loss Valve are generally used in household gas stoves or water heaters, and high pressure valves are used in high-power gas stoves in restaurants.
The high pressure valve is used in the water heater. Because of the high pressure and high flow rate, it is very likely that the gas will not be released and the gas will be released into the air. The water heater will ignite again and ignite the mixture to generate an explosion. It is not a gas bottle explosion, and of course it will indirectly lead to the explosion of the gas bottle. .