What type of system combines a first stage regulator, a 2 PSI service regulator, and a line pressure regulator?

The type of system that combines a first stage regulator, a 2 PSI service regulator, and a line pressure regulator is the LP-Gas vapor delivery system. This system is specifically designed for the transportation and regulation of liquefied petroleum gas (LP-Gas) in its vapor form.

In an LP-Gas vapor delivery system, the first stage regulator reduces the high pressure from the storage tank to a manageable pressure. The 2 PSI service regulator further reduces the pressure to a level suitable for residential or commercial appliances. Finally, the line pressure regulator ensures that the pressure remains stable and within safe operating limits for the specific appliances connected to the system.

Each component plays a crucial role in ensuring that gas is delivered safely and efficiently. This setup is not related to electric, water, or air pressure systems, which have their own distinct regulatory mechanisms and applications. Understanding the configuration and function of each regulator within the LP-Gas vapor delivery system is essential for proper installation, maintenance, and safety compliance in handling LP-Gas.