Screw feeders are a highly effective way of metering bulk powder materials. Most screw feeders are installed underneath a bin or hopper to control the rate of conveyed product. Typically, screw feeders utilize a shafted or shaftless helix rotating inside a tube or trough, imparting force against product as it rotates. The product is transferred and discharged in a controlled manner as the helix starts/stops or varies in speed.
Powder Process-Solutions can provide a properly designed solution for your products. PPS screw feeders are custom designed to fit your exact application including the size, length, material of construction and configurations appropriate for your facility.
Types of Screw Feeders
Selecting the right screw feeder is primarily determined by the type of material being metered. The material characteristics should be analyze—and potentially tested—to determine the appropriate design for your powder processing system. There are two main types of screw feeders that PPS provides: Single screw feeders and twin screw feeders.
Single Screw Feeder
Single screw feeders have a large inlet size, which eliminates material bridging. The single screw feeder works best with particulate material from very fine to coarse or fibrous. The speed screw is available in a variety of sizes. Single screw feeders can be designed with or without agitators depending on your speed requirements and product characteristics.
Twin Screw Feeders
Twin screw feeders are a good option to increase capacity while improving product performance. Twin screw feeders are designed to address three primary types of products that cause problems during the metering process:
- Sticky materials that plug up single screw feeders.
- Powders that are easily fluidized and don’t flush through a single tube.
- Cohesive powders.
Screw feeders offer accurate metering of many powder materials requiring a sanitary, reliable conveyance of powders. Screw feeders are easily demounted, making it easy to clean internal surfaces and the screw itself. Screw feeders are useful solutions in the following industries:
- Snack Food Industry
- Dairy Industry
- Chemical Industry
- Pharmaceutical Industry
Powder Process-Solutions’ Volumetric Screw Feeders
Screw feeders are used for applications where the controlled rate of product discharge is important to the process. PPS is proud to introduce our Volumetric Screw Feeder (VSF) and Volumetric Screw Feeder with Overflight (VSFO) designs to supply to the dairy processing industry and the nutritional/food processing industries.
Our VSF and VSFO screw feeder models meet the requirements of 3-A sanitary standard 81-00. Auger diameters are available ranging from 4″-10″ with lengths to fit almost any application. The fully demountable design allows for easy cleaning, and quick disassembly and reassembly.
For more information about our screw feeders, check out our fact sheet.
Contact Us Today
If you’re interested in getting more information on how Powder Process-Solutions can assist you with your powder processing needs, please contact us today.