This type of filling equipment fills bottles, tubs and/or containers by releasing valves that are connected to a tank, allowing the product to flow into the container. Gravity filling systems are ideally suited for thin to medium viscosity, sometimes foamy products while pressure filling systems have the ability to handle slightly more viscous to high viscosity liquids. Both types of filler are designed for liquids, oils and thin products. They can be in a rotary or inline orientation. Pressure filling is normally created by a positive displacement pump and can handle a wide range of vicious products like creams, gels, oils, lotions and heavy paste. These fillers are used in a wide range of industries including food, beverage, chemical and pharmaceutical. Gravity fillers are the most economical type of filling machines but have a limited range of applications.