stainless screw conveyor

What is a stainless screw conveyor?

stainless screw conveyor  is a common bulk material conveying equipment. This type of equipment can be divided into two common types according to the structural form: U-shaped trough type and tube type. It can also be designed as a single screw or double screw configuration according to specific uses. The design of stainless steel screw conveyor can achieve the processing of several cubic meters to tens of cubic meters of materials per hour. The specific processing capacity depends on the screw diameter, speed and material characteristics. Its conveying distance is usually in the range of several meters to tens of meters, which can meet the material transfer needs between different equipment in the factory. This equipment is mainly used in specific production links with strict requirements on hygiene, corrosion prevention or cleanliness.

What are the types of stainless steel screw conveyors?

Stainless screw conveyors are widely used in industries that require high cleanliness or handle special materials due to their excellent corrosion resistance, easy cleaning and compliance with hygiene standards. Its types can be mainly distinguished from the following aspects:

Features: It adopts a U-shaped open trough, which is easy to clean and maintain, and has a relatively simple structure.

Application: It is mainly used for horizontal or small inclination (usually less than 20°) material transportation. It is suitable for powdered or granular materials with strict requirements on residues.

Features: It adopts a fully enclosed circular tube shell to achieve completely closed transportation, effectively preventing dust leakage and external pollution.

Application: It is suitable for occasions with high environmental requirements, toxic and harmful, volatile or need to maintain material cleanliness, such as conveying materials with strict dust control, and can also be used for inclined or vertical transportation.

Features: The spiral blades are welded on the central shaft, and the blades are driven to push the material through the rotation of the central shaft. The structure is stable and suitable for conveying materials with good fluidity, non-sticky or not very sticky.

Application: conveying most conventional powdery and granular materials, such as flour, starch, sugar, granular chemical raw materials, etc.

Features: The spiral blade has no central shaft, but conveys materials through a flexible spiral body wrapped in the trough. The design without a central shaft avoids the material from winding or clogging on the shaft, and is especially suitable for conveying materials with strong viscosity, easy winding, block or fiber.

Application: sludge, garbage, wet residue, fibrous materials, high-viscosity paste materials, etc., which are common in sewage treatment, food waste treatment and other fields.

Basic parameters of stainless screw conveyors

What are the advantages of stainless screw conveyors?

Stainless steel screw conveyor has unique advantages among many bulk material conveying equipment due to the special nature of its material. The following are the main advantages of stainless steel screw conveyor:

Corrosion resistance: This is the core advantage of stainless steel. Stainless steel (such as 304, 316L, etc.) contains alloy elements such as chromium and nickel, which can form a dense passivation film on the surface, effectively resisting the corrosion of acid, alkali, salt solution and various organic and inorganic chemicals.

Avoid material contamination: Stainless steel material itself is stable in nature, will not release harmful substances into the conveyed material, and will not react chemically with the material. This ensures the purity of the material during the conveying process and avoids rust contamination or other impurities that may be caused by carbon steel equipment.

Strong structure and durability: Although the cost of stainless steel is higher than that of carbon steel, its high strength and toughness ensure the strong structure of the equipment. With sophisticated manufacturing technology, stainless screw conveyor can withstand continuous material loads and operating stress.

Wide adaptability: In addition to the versatility of traditional screw conveyors in conveying various types of powdered, granular, and small block materials, the addition of stainless steel enables it to be expanded to a wider range of material types, especially those materials that have special requirements for material purity, hygiene level, and corrosion resistance, such as polymers, fine pigments, condiments, and various additives.

What are the applications of stainless screw conveyors?

Stainless screw conveyors play a role in a variety of material handling scenarios, mainly used for continuous conveying of bulk materials, especially in those occasions where there are specific requirements for material purity, hygiene, or equipment corrosion resistance.

Handling corrosive materials: When the material itself is acidic, alkaline, or otherwise corrosive, stainless steel can resist erosion, extend the service life of the equipment, and ensure the stability of the conveying process.

Requirements for material purity: When the conveyed material cannot be contaminated by rust or other impurities, stainless screw conveyors are an important choice. It ensures that the material maintains its original purity throughout the conveying process.

Need to maintain hygiene and cleanliness: In scenarios that require frequent cleaning and disinfection, the smooth surface and corrosion resistance of the stainless screw conveyor make it easy to clean, help maintain a high standard of hygiene and avoid cross-contamination of materials.

Material conveying and grading: It can be used to convey powders, granules, and small pieces of materials from one processing unit to another, and can also assist in grading or mixing materials in some cases.

Adapt to complex space layout: The stainless screw conveyor can be installed horizontally, tilted or vertically according to the actual space and process requirements on site, and flexibly adapt to various material conveying paths.

What is the price of stainless screw conveyor?

Stainless screw conveyor is widely used in industries with strict requirements for hygiene and corrosion protection due to its excellent corrosion resistance, high cleanliness and easy maintenance. Its price range ranges from US$100 to US$5,000, which is determined by a variety of factors: material grade and surface treatment are the primary factors affecting the price of stainless screw conveyor. For example, there is a significant price difference between 304 stainless steel (food grade) and 316L stainless steel (higher corrosion resistance), and 316L is usually more expensive. The type of equipment and structural complexity also directly affect the price. U-trough structure is usually slightly cheaper than tubular structure because tubular conveyors require more precise processing and sealing. Conveying capacity and size are another key factor. The processing capacity of the equipment (volume or weight of material conveyed per hour) directly determines the diameter, length and required motor power of the screw. The type and accuracy of the spiral blades also affect the cost. Spiral blades come in various forms, such as solid, belt, paddle, etc. Blades with special shapes (such as variable pitch blades) or higher requirements for blade processing accuracy will increase manufacturing difficulty and cost. Finally, brand and service are also considerations. Well-known brands usually have more mature technology, stricter quality control and a more complete after-sales service network, and their product pricing will be relatively high. Customized requirements (such as special explosion-proof, high temperature resistance, ultra-high cleanliness, etc.) will also lead to additional design and manufacturing costs.

The selection and configuration of the stainless screw conveyor is often based on the specific physical and chemical properties of the processed materials and the specific requirements for the processing environment. The application of stainless steel enables this type of conveyor to cope with corrosive media or occasions with strict cleanliness regulations. In the process of conveying materials, it realizes closed operation, which helps to maintain a clean environment in the workshop. Therefore, the stainless screw conveyor is a key equipment for the orderly movement and management of materials in the production line.