While having a regulator for a propane torch isn’t always mandatory, it is a good idea to have it. For a good reason, some propane torches currently available on the market have integrated regulators.
The role of a propane torch regulator is to provide proper gas flow control. This is essential because gas is highly flammable, and you want to stabilize its pressure to work safely.
These regulators ensure that you get a constant flow of gas pressure every time you use your propane torch.