First-stage regulators are designed to reduce the pressure of LPG from the storage vessel to a level that can be safely handled by the second-stage regulator. First-stage regulators are typically located near the LPG bottle and are available in a variety of sizes and connection types.
To adjust pressures between the service line and the appliance, technicians install these regulators outside a building. The low pressure regulators moderate the delivery pressure from the first stage regulator and generate outlet pressure that then flows through to power an appliance.
Carousel is intended for filling large quantities of liquefied petroleum gas (LPG) cylinders. It consists of a frame with running wheels, rails, a central column for LPG and air, and a driving unit the carousel frame around the central column.
It is a system ensures that the cylinders to be filled are transported most efficiently to the other equipment which will be between the discharge and filling points.