Liquid Filling Machine Suppliers & Manufacturers

Liquid filling machine types and technology selection

Liquid filling machines fill measured quantities of liquid product into bottles, jars, cans, pouches, or other primary containers on a production line. The filling technology must be matched to the product viscosity, fill accuracy requirement, container type, and required production speed. The main filling technologies are: gravity fillers — use gravity flow from an elevated tank through a valve; suitable for thin, free-flowing liquids (water, thin juices, spirits); simple and economical but not suitable for viscous products or where high fill accuracy is required. Piston fillers — a reciprocating piston draws a measured volume of product and injects it into the container; highly accurate for all viscosities including thick pastes; the standard for edible oil, sauce, mayonnaise, shampoo, and similar products in the range of 100mL–10L. For edible oil filling, piston fillers with stainless steel food-grade cylinder and seals are required. Flow-meter fillers (Coriolis or electromagnetic) — measure flow by mass or volume using a precision flow sensor; highly accurate for thin to medium viscosity liquids; no direct product contact with the meter mechanism; the standard for beverages and water filling in high-speed lines. Peristaltic fillers — a rotating rotor compresses a flexible tube to move product; the product only contacts the tube (no pump mechanism contamination); used for pharmaceutical, cosmetic, and hygienic filling where product contamination risk must be minimised. Overflow fillers — fill to a fixed level regardless of container volume variation; used for beverages and water where a consistent visible fill level is more important than precise volume. Time-gravity fillers — fill for a fixed time period under gravity; economical but less accurate than volumetric methods. For edible oil and cooking oil filling, the standard is a piston or flow-meter filler in food-grade 316 stainless steel construction with CIP (clean-in-place) capability.