The regulator on the gas cylinder bottle allows gas to pass through to the gas stove for heating or burning. When the regulator knob is turned on, the pin inside goes down and releases the gas to the fuelled appliance. The pressure of the LPG in the gas bottle varies and also much higher than is needed by the appliance that use it, it needs to be controlled to ensure a steady supply at constant pressure. This is done by a regulators, which limits the pressure to suit the appliance that is being fuelled. A regulator helps to control the speed, pressure, temperature of the appliance. This valve regulates the flow of gas.
The roaring noises (of fire), burning with a lot of flames and heat, can be from a regulator that cooks food quickly under high pressure. The force caused by the regulator produce a particular amount of gas, so that when the container is opened, the liquid or gas escapes quickly.
The pressure of the appliance depends on the type of regulator used for supplying gas to the utilities. The Quick-On+ High Pressure Gas Regulator is designed for the gas supply of medium pressure (2bar) appliance, such as blowpipes and flame welders, with a power of not more than 8kg/h - max.input pressure of 16bar. The Quick-On+ high pressure regulator is also called the Industrial Regulator, mostly used outdoors because of its output pressure.
While on the other hand, the Quick-On+ Low Pressure Regulator is a domestic regulator used to supply gas to utilities at specific pressure and flow, with the input pressure => 1-16bar and outlet pressure(pd) => 30bar. The guarantee output (mg) of the Quick-On+ low pressure regulator is 1kg/h - 2kg/h.
When obtaining LPG regulators for your gas appliance, make sure you check for the operating INSTRUCTIONS written on the label. Be sure that the inlet and outlet of the regulator are correct and suitable for the cylinder valve and the application.
Lastly, LPG is sold in two forms: commercial propane and commercial butane. It is a good idea to know the right LPG for your appliance. The wrong LPG can cause utilities to malfunction or stop working altogether.