The most common valve found in bulk solids handling is without doubt the butterfly valve. This type of valve is simple, robuts and works globally well with the flow of bulk solids.
This page is giving details on the design of butterfly valve and their actuator.
The constitution of a butterfly valve is quite simple : the product flow is stopped or allowed thanks to a butterfly, a thick gasket is ensuring the tightness of the valve and an actuator (most of the case pneumatic) is allowing the valve to move.
Figure 1 : Butterfly Valve drawing
|Powder properties||Unit operations||Equipment handbook|
Flow of solids
Mass and funnel flow silos
Particle Size Distribution (PSD)
Dosing and weighing
Solid Gas Separation
Grinding and Milling
Solid Liquid Suspension
Checking (sieve and magnets)
|Big Bag Tipping Stations
Airlock rotary Valve
Rotary Valves (pneumatic)