In terms of filling accuracy
Servo rotor pump filling machine: The servo system is used to precisely control the rotational speed and running time of the rotor pump. Combined with high - precision measuring devices such as flow meters or weighing sensors, the filling error can be controlled within a very small range. This ensures that the weight and size of each sausage are highly consistent, with high product quality stability. It is suitable for the production of sausages with extremely high requirements for weight accuracy, such as high - end customized sausages and export products.
Piston - type filling machine: It achieves filling by the reciprocating motion of the piston in the cylinder. Its accuracy is affected by factors such as the fitting accuracy between the piston and the cylinder and the wear of the sealing ring. After long - term use, there may be a large deviation in the filling volume.
Screw - type filling machine: It pushes materials through the rotation of the screw. Its accuracy is influenced by factors such as the pitch accuracy of the screw and changes in material viscosity. When filling products with high - precision requirements, there may be certain limitations.
In terms of material adaptability
Servo rotor pump filling machine: The sealed chamber between the rotor and the stator exerts a relatively small shearing force on the material during the material transportation process, which can well maintain the original structure and characteristics of the material. It can stably transport and fill water - starch sausage fillings containing different forms of components such as meat chunks and fat particles, as well as fillings of various viscosities, with a very wide range of applications.
Piston - type filling machine: For fillings with high viscosity and large - particle materials, the piston may encounter greater resistance during the pushing process, and may even cause material blockage, affecting the filling efficiency and quality.
Screw - type filling machine: It is more difficult to control the filling of low - viscosity materials, and problems such as material self - flowing and inaccurate filling volume are likely to occur. Moreover, for large - particle materials, it may cause screw wear or material breakage.
In terms of hygienic performance
Servo rotor pump filling machine: It is mostly made of food - grade materials such as 304 stainless steel or 316L. The surfaces of the components in contact with the material are smooth, with no unhygienic dead corners. The pump body, pipes, and filling head can be disassembled for thorough cleaning, which can effectively prevent material residues and bacterial growth, meeting strict food hygiene standards.
Piston - type filling machine: Materials are likely to remain in the gaps between the piston and the cylinder, as well as in parts such as valves. More components need to be disassembled during cleaning, and the operation is relatively complex. There may also be situations where the cleaning is not thorough.
Screw - type filling machine: There may be material residues in the gap between the screw and the barrel, especially after filling high - viscosity materials. Cleaning is more difficult, and if not cleaned in a timely manner, it is likely to produce odors and bacterial contamination.
In terms of operational stability and efficiency
Servo rotor pump filling machine: The working principle of the rotor pump enables it to have a stable flow rate and small pressure fluctuations during operation. It can work continuously and stably for a long time. Coupled with the fast response and precise control of the servo system, the filling speed is fast, which can effectively improve production efficiency, reduce equipment failure rates, and shorten downtime for maintenance.
Piston - type filling machine: The reciprocating motion of the piston has inertia and impact. At high - speed operation, it may affect the stability of the equipment, resulting in a decrease in filling accuracy. Moreover, the frequent movement of the piston easily wears the seals, which need to be replaced regularly, affecting production efficiency.
Screw - type filling machine: The screw may generate vibration and noise during high - speed rotation. After long - term operation, problems such as screw loosening and wear may occur, affecting the stability and accuracy of filling, and thus reducing production efficiency.
In terms of self - priming ability
Servo rotor pump filling machine: It has a strong self - priming ability and can suck in materials by itself without additional auxiliary equipment. This not only facilitates operation but also simplifies the production process, reducing equipment costs and floor space.
Piston - type filling machine: Usually, it has a relatively weak self - priming ability. The material barrel needs to be placed at a higher position or a special feeding device needs to be equipped, increasing the complexity and cost of the equipment.
Screw - type filling machine: Its self - priming ability is also relatively limited. For some materials stored at a low position, additional suction equipment may be required to assist in feeding.
