Valves for Powder & Granule Handling

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Butterfly Valves

Butterfly Valves for Powders and Granules

Butterfly valves designed for gravity isolation and flow regulation of powdered and granular bulk materials under silos, bins, and hoppers.

Die-cast aluminium split body with abrasion-resistant valve disc and dust-tight elastomer sealing.

Nominal sizes: DN 100–400 (4–16 in).

Available configurations:

• Version with identical upper and lower flanges for flange-mounted installation

• Version with top flange and beaded bottom section for flexible sleeve or expansion joint connection
  

Food-grade versions with stainless steel disc and FDA-approved seal are available.
ATEX Zone 22 compliant versions available upon request.

Technical Specification

Explore detailed product specifications and expand your technical knowledge of bulk handling valves for powders and granules used in gravity discharge, flow control, and isolation applications across industrial processes.

General Operation

Aluminium body butterfly valves for gravity isolation and flow control of powders and granules under silos, bins, and hoppers. Featuring die-cast aluminium construction, abrasion-resistant disc options, and dust-tight elastomer sealing.
Available in DN 100–400, with manual, pneumatic, or electric actuation (supplied separately).
Suitable for standard, food-grade, and ATEX applications.

Benefits

• High abrasion resistance for extended service life when handling powders and granules

• Lightweight construction for easy installation and handling

• Compact design with reduced overall dimensions

• Low maintenance requirements due to replaceable wear components

• Optional ATEX-certified versions available for use in potentially explosive atmospheres

Available Options upon Request

• ISO 5211 square drive shaft

• Seal tested for overpressure and vacuum up to ±0.2 bar (at ambient temperature)

• Extended drive shaft

• Alternative seal materials for operating temperatures from –25 °C up to +150 °C or up to +230 °C

• Valve disc in stainless steel AISI 316

• ATEX-certified execution for potentially explosive atmospheres (Zone 22)

• Compliance with EN 1935/2004 for food-contact applications

• Food-grade version with stainless steel disc and integral seal

Technical Specifications

Description

Butterfly Valves for Powders & Granules — Aluminium Body

Butterfly valves with die-cast aluminium bodies are designed for reliable interception and isolation of powdered and granular bulk materials in gravity discharge applications.
Installed under silos, bins, hoppers, and feeding equipment, these valves ensure controlled material flow and effective dust-tight shut-off.

Function

The valve consists of a high-pressure aluminium alloy body with abrasion-resistant disc options in cast iron, engineering polymer, or stainless steel. Sealing is achieved by elastomer gaskets, with food-grade versions available featuring integral seals.
Material flow is controlled by rotating the disc through 90°, using manual, pneumatic, or electric actuators. Actuators are supplied separately to allow proper selection according to material properties and operational requirements.

Features / Technical Data

Nominal Sizes:

• DN 100 – 150 – 200 – 250 – 300 – 350 – 400 mm

Body & Flange Configurations:

• Aluminium split body with identical upper and lower flanges for sandwich installation between mating flanges.

• Version with top flange and beaded bottom section, suitable for fixing a flexible sleeve or expansion connection.

Sealing & Pressure:

• Dust-tight design suitable for gravity applications.

• Operating pressure / vacuum up to 0.2 bar.

• Replaceable sealing elements for simplified maintenance.

Materials:

• Aluminium alloy valve body

• Disc in Aluminium, Cast iron, Engineering polymer, or Stainless steel

• Elastomer gasket profiles for standard or food-grade applications

Interfaces & Standards:

• DIN 5482 Splined drive shaft or ISO 5211 Square drive shaft for actuator mounting

• Compatible with manual, pneumatic, or electric actuation (supplied separately)

Industries and Applications

• Gravity discharge under silos, bins, and hoppers

• Bulk solids handling and processing systems

• Mechanical and pneumatic conveying lines (within pressure limits)

• Industries including building materials, minerals, chemicals, food processing, and related sectors

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