Filling head comprises inner and outer concentric cylindrical ducts. It consists of a door connected to the bottom end of the outer duct. The doors are movable between an open depending position and a horizontal position closing the lower ends of the duct. It is designed for safe and easy filling and evacuation of all types of LPG cylinders. Filling heads are easily removable and disassembled. It is fitted with a device holding heads opened for washing operations.

A film capacitor has three layers: a bottom electrode, a dielectric material, and a top electrode. The insulating material may contain two different types of electrodes. Characteristics of capacitor elements include capacitance per unit area, temperature coefficient of capacitance, dissipation factor, dielectric constant, and breakdown voltage. Common dielectric materials used for film capacitor formation include SiO, tantalum oxide, and organic polymers. Capacitor electrodes are usually made from Al, Au, Cu, or Ta, depending on the dielectric material used.