The Application of Pneumatic Filling Valves in the Filling Line of Automated Winemaking Plants

In highly automated modern breweries, the filling line is the final critical link in terms of production capacity and quality. The performance of the Pneumatic filling valve directly determines the speed of the production line, the loss of liquid, and the consistency of the products. For many craft breweries and large brewing enterprises in Norway that strive for efficiency and excellent quality, two core pain points are particularly prominent: Firstly, in high speed filling, can the valve opening and closing respond quickly to match the production line rhythm. Secondly, can an absolute reliable cut off be achieved after filling (zero post-filling leakage) to avoid the leakage of liquid onto the bottle, label, and equipment, while reducing the waste of precious products.

The core elements for achieving rapid response

1.Air actuator and gas supply system

The rapid response lies in the design of the pneumatic actuator and the quality of the air source. For filling valves, single-acting spring-return type or compact double-acting cylinders are usually selected. At the same time, a stable, dry and pressure-sufficient air source (2-8 bar) is a prerequisite for ensuring a millisecond-level response time.

2.The flow channel design of the valve itself

The internal flow channel structure of the valve directly affects the fluid flowability and the opening/closing resistance. The full-diameter or streamlined valve chamber can minimize the fluid resistance, which helps maintain a stable filling flow rate. The lightweight design of the valve core can also reduce the motion inertia, facilitating rapid operation.

Overcoming the "leakage" problem

Leakage is the ultimate bane of filling accuracy, and its root cause lies in the mating accuracy of the sealing valve seat and the material's tolerance.

1.The precise fit and working principle of the sealed valve seat

The realization of the "zero drop leakage" goal lies in the combination of the internal sealed design and the elastic valve seat. When the valve is closed, the valve stem drives the valve core to press against the PTFE valve seat. The slight elastic deformation of the PTFE material under force can perfectly fill the microscopic unevenness between the metal valve core and the valve seat, achieving a full-area tight fit. This fundamentally eliminates the possibility of leakage from the valve stem.

2.As the base material for all metal components in contact with the fluid, the stainless steel valve body provides the necessary strength and corrosion resistance. It can withstand the long-term erosion caused by the weak acidic components in beer and the acid and alkali solutions used in CIP cleaning, thereby avoiding the risk of seal surface damage or contamination due to metal corrosion.

3.Long life: The all-metal structure is designed for high-frequency industrial environments, with a cycle life of up to several million times.

4.By adding the electrical control signal of the solenoid valve and connecting it to the PLC system, automatic and intelligent control can be achieved.

On the filling line of an automated winery, choosing an efficient pneumatic actuator, a precise internal sealing design, and a filling valve made of PTFE and stainless steel materials can effectively enhance the operational efficiency of the filling line, improve product quality, and reduce the overall operating costs.