Rotary Feeder / Screw Feeder for Agent Injection Systems

Product Specifications

Technical details and manufacturing context for Rotary Feeder / Screw Feeder

Definition

The Rotary Feeder / Screw Feeder is a component used in machinery and equipment manufacturing, specifically within an Agent Injection System. It is responsible for the controlled, volumetric feeding of solid agents such as catalysts, additives, or powders from a storage hopper into the main process line. This feeder ensures consistent flow rates, prevents backflow of process gases, and maintains system pressure isolation. The device operates on the principle of volumetric displacement: material from an overhead hopper fills the pockets of a rotating rotor (in a rotary feeder) or the flights of a rotating screw (in a screw feeder). As the rotor or screw turns at a controlled speed, a measured volume of material is discharged from the outlet. In rotary feeders, the tight clearance between the rotor and housing provides an airlock function, preventing gas exchange between the inlet and outlet sides. The feeder is available in materials such as cast iron, stainless steel, and carbon steel. Key parameters include throughput (0.5–50 m³/h), rotor speed (10–60 rpm), metering accuracy (±1–3%), operating pressure (1.0–1.6 MPa), operating temperature (-20–150 °C), shaft seal type (PTFE, with options for packing, lip seal, or mechanical seal), housing material (SS304, also SS316 or carbon steel, per ASTM A240), rotor material (SS316, per ASTM A240), motor power (0.75–11 kW, per IEC 60034), voltage (380–480 V AC, 50/60 Hz, 3-phase, per IEC 60038), ingress protection (IP54–IP65, per IEC 60529), noise level (≤75 dB(A) at 1 m, per ISO 3746), and weight (50–500 kg). These values are reference ranges and must be verified for the specific model and application. Standards listed are for procurement and verification reference only, not proof of certification or compliance. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

Material from an overhead hopper fills the pockets of a rotating rotor (rotary feeder) or the flights of a rotating screw (screw feeder). As the rotor or screw turns at a controlled speed, a measured volume of material is discharged from the outlet. The tight clearance between the rotor and housing (in rotary feeders) provides an airlock function, preventing gas exchange between the inlet and outlet sides of the system.

Common Materials

Cast Iron, Stainless Steel, Carbon Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Throughput	0.5–50 m³/h	Depends on rotor size and speed
Rotor Speed	10–60 rpm	Adjustable for metering accuracy
Metering Accuracy	±1–3 %	Depends on material flowability
Operating Pressure	1.0–1.6 MPa
Operating Temperature	-20–150 °C	Higher temps require special seals
Shaft Seal Type	PTFE	Options: packing, lip seal, mechanical seal
Housing Material	SS304	Also available: SS316, carbon steelASTM A240
Rotor Material	SS316	Wear-resistant coating optionalASTM A240
Motor Power	0.75–11 kW	Depends on rotor size and material densityIEC 60034
Voltage	380–480 V AC	50/60 Hz, 3-phaseIEC 60038
Ingress Protection	IP54–IP65	Higher IP for dusty environmentsIEC 60529
Noise Level	≤75 dB(A)	At 1 m distanceISO 3746
Weight	50–500 kg	Depends on size and material

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Rotor / Screw Part
The rotating element with pockets or flights that captures and conveys the material.

Material: Stainless Steel, Cast Iron, or Abrasion-Resistant Alloy
Housing / Casing Part
Encloses the rotor/screw, provides inlet and outlet ports, and supports bearings.

Material: Cast Iron or Carbon Steel
Drive Assembly
Typically an electric motor and gear reducer that provides controlled rotational power to the rotor/screw.

Material: Various (Motor: Copper, Steel; Gearbox: Steel)
Shaft Seals Part
Prevent material leakage and ingress of contaminants along the drive shaft.

Material: PTFE, Rubber, Mechanical Seal Materials
Bearings
Support the rotor/screw shaft and allow smooth rotation.

Material: Chrome Steel (Ball/Roller Bearings)

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Agent Injection System

View system integration details

Manufacturers of Rotary Feeder / Screw Feeder

Manufacturer profiles associated with Rotary Feeder / Screw Feeder.

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Frequently Asked Questions

What is the difference between a rotary feeder and a screw feeder?

A rotary feeder uses a rotating rotor with pockets to displace material, while a screw feeder uses a rotating screw with flights. Both provide volumetric metering, but the rotary feeder also acts as an airlock due to tight clearances, preventing gas exchange. The screw feeder is often used for more continuous flow and may handle different material characteristics.

What materials can be fed with this device?

The device is designed for dry bulk materials or powders, such as catalysts, additives, or other solid agents. The specific material compatibility depends on factors like flowability, abrasiveness, and temperature, and should be verified with the manufacturer.

What are the typical operating conditions?

Reference parameters include operating pressure of 1.0–1.6 MPa, temperature range of -20 to 150 °C, and rotor speed of 10–60 rpm. These are general ranges; actual limits depend on the model and application, so confirm with the supplier.

How do I verify the feeder's specifications for my application?

Always check the model-specific datasheet and confirm values such as throughput, accuracy, materials, and standards with the legal manufacturer or supplier. The listed standards (e.g., ASTM A240) are references for procurement and verification, not guarantees of compliance.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 1 bar differential pressure, vacuum to 0.5 bar positive pressure
flow rate:	0.1 to 300 m³/h depending on screw diameter and speed
temperature:	-20°C to 200°C (standard), up to 400°C with special seals/heating
material size:	Up to 10 mm particle size (standard), larger with special designs
moisture content:	Up to 15% moisture (standard), higher with special coatings

Rotary Feeder / Screw Feeder

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards