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E-mail
shouwang6368@126.com
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Phone
18051034886
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Address
No. 19, Tuanshan East Road, Lishui Economic Development Zone, Nanjing City
Nanjing Shouwang Machinery Equipment Co., Ltd
Process principle of sanitary vacuum feeding machine
Date: 2025-07-30Read: 6
The hygiene grade vacuum feeder is an automated equipment based on the principle of vacuum negative pressure to achieve sterile and dust-free material transportation. Its core process principles and characteristics are as follows:
1、 Core working principle
1. Vacuum generation stage
A vacuum pump (or Roots blower) extracts air in a closed system, creating a stable negative pressure environment inside the conveying pipeline (with a vacuum degree typically ranging from -0.4 to -0.6 MPa). The material is sucked into the suction nozzle due to the pressure difference, mixed with air to form a material airflow that enters the conveying pipeline.
2. Gas material separation stage
After the material airflow enters the separation bin, gas-solid separation is achieved through a precision filter (such as 316L stainless steel filter element): the air is discharged from the system through the filter element, and the material settles to the bottom of the bin due to gravity. Some equipment is equipped with cyclone separators to improve the separation efficiency of fine powders.
3. Material unloading stage
When the material in the silo reaches the preset amount, the vacuum pump stops running and the system pressure returns to equilibrium. The discharge valve automatically opens, and the material falls into downstream equipment (such as reaction vessels and mixers) by its own weight.
4. Self cleaning stage
At the same time of unloading, the compressed air pulse blows back on the filter element to remove attached powder, prevent blockage, and maintain filtration efficiency. The blowback gas is discharged through the exhaust port to ensure the cleanliness of the system.
2、 Key to hygiene grade design
1. Fully enclosed transportation: The entire pipeline is sealed to prevent dust leakage and cross contamination, in compliance with GMP/OSHA standards.
2. Easy to clean structure: Made of 316L stainless steel material, mirror polished, and quick detachable clamp connection, ensuring no hygiene dead corners.
3. Intelligent control: PLC system linked with material level sensor, automatically starts and stops the conveying cycle as needed; Touch screen adjustable parameters (delivery volume, time, etc.).
4. Specialized filter: Food/pharmaceutical grade filter element (pore size 0.2-5 μ m) intercepts fine dust to ensure material purity.
3、 Process cycle
Vacuum generation → suction → separation → discharge → blowback cleaning → standby, the entire process is automatically cycled.
4、 Adapt to material characteristics
Suitable for powders and particles with good fluidity (particle size usually ≤ 5mm), such as raw materials with high hygiene requirements, milk powder, food additives, etc.
