Overview

Rotary Feeder Valve

A rotary feeder valve is used to provide controlled and metered feeding of bulk solids, helping to prevent excessive material flow that could overload or block downstream equipment.

The rotor is driven by an electric motor or pneumatic actuator, allowing precise control of the feeding capacity. As the rotor turns, it delivers a consistent volume of material per revolution, enabling reliable process control.

1bar

Differential Pressure

0.05mm

Housing Clearance

GMP+

Compliant Design

Features

Sanitary Design

Smooth internal surfaces, and easy-maintenance designs to meet industry hygiene standards.

Robust Sealing Performance

Precision-machined rotor and housing provide tight clearances, effectively minimizing air leakage and preventing material backflow.

High Discharge Efficiency

Optimized rotor pockets provide consistent volumetric feeding, reduce material retention, and ensure smooth discharge.

Flexible Drive Options

Available with electric motor drive or pneumatic drive, allowing compatibility with different industrial environments and safety requirements.

Easy Integration

A space-saving body, standard flange connections, and flexible mounting options allow quick installation into hoppers, mixers etc.

Variable Speed Control

Different drive options enable adjustable rotor speed, allowing precise feed-rate control, improved process stability.

Specification

Technical Specifications

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Mechanical Parameters

Rotor Diameter	DN 100 - DN 300
Number of Pockets	6 / 8 (configurable)
Rotor Speed	5 - 30 RPM (VFD)
Volumetric Capacity	2 - 40 L/rev
Housing Clearance	0.05 - 0.2 mm
Leakage Rate	0.1% - 0.5%
Drive Option	Electric or Pneumatic Drive

Material & Process Parameters

Contact Material	Stainless Steel / Ceramic Coating
Surface Finish	Ra ≤ 0.8 μm
Operating Temperature	-20 °C to +250 °C
Max. Differential Pressure	1.0bar (standard)
Seal Type	PTFE / Mechanical Seal
Flange Standard	DIN / ANSI / Custom
ATEX Classification	Zone 20/21 (optional)

Download Full Technical Datasheet

Get the complete specifications, and performance data in one document. PDF · ~2MB

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Applications

Food

Food Ingredients

Applied for flour, sugar and powdered ingredients. Sanitary design and easy cleaning for food safety standards.

Pharmaceutical

APIs & Excipients

Used for precise dosing fine APIs, excipients, and intermediates under GMP compliance.

Chemical

Pigment & Catalyst

Stable feeding and dust control while supporting continuous conveying under different pressure conditions.

Mineral

Limestone & Talc

Heavy-duty construction and wear-resistant components ensure reliable operation.

FAQ

Answers to the most common technical and commercial questions from procurement managers and process engineers evaluating rotary feeder valves.

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How do I choose between an electric or pneumatic drive?

An electric drive is suitable for continuous operation and stable speed control, usually with a motor and gearbox. A pneumatically driven rotary valve is ideal for hazardous or explosive environments where compressed air is preferred.

Can the feeding rate be adjusted?

Yes. The feeding rate can be adjusted by changing the rotor speed, usually through a variable frequency drive (VFD).

How can air leakage be minimized?

Air leakage can be minimized by using proper rotor clearances, precision machining, good sealing design, and suitable rotor types.

Are rotary valves suitable for sticky materials?

Yes, but special designs are required. For sticky or cohesive materials, anti-stick coatings, open rotor designs, or assisted cleaning features are recommended to prevent material buildup and bridging.

What maintenance does a rotary feeder valve require?

Regular maintenance includes checking rotor wear, seals, bearings, gearbox, and clearance between the rotor and housing. The valve should also be cleaned regularly to prevent material buildup.