• Screw conveyor
• Butterfly discharge valve
• Container with volumetric measurement system and additional balance
  • Linear transducer for set point setting
  • Tuning fork for deactivation
• Working volume 500 l
• Butterfly discharge valve
• 2-way distribution
• Downpipe to mixer 1 and mixer 2

The product range of flat slide valves ranges from manual emergency slide valves to pneumatically or electrically operated dosing slide valves. In detail, they have the following features:

• The slider plate can be sealed by an adjustable stuffing box
• The lateral sealing of the slider plate is ensured by felt or Vulkolan strips
• Deflector frames, which hold back the material pressure from the sealing strips can be used
• The slider plate position is monitored via inductive limit switches
• The structure of all flat slide valves is designed for a long service life
• The size of the flat slide valves can be specifically customised

• Heinrich Welb & Söhne manufactures the box feeders in an extremely robust design. This is because these conveyor elements are mostly subjected to very high material stress.
• All baffles are lined with wear protection material such as Hardox, PE1000 or rubber.
• The use of a large drum diameter ensures consistent power transmission.
• The belt supplied is a rubber belt or steel cable belt, depending on the use.
• Shredders can also be used for discharge aids.

• The small component dosing device of Heinrich Welb & Söhne is based on a screw conveyor with a superordinate material loosening system designed according to the discharge behaviour of the material conveyed.
• This system guarantees a high dosing accuracy as well as a continuous and undisturbed operation of small component plants.
• The dosing performance is variable by the use of frequency converters.

Differential dosing balance

• The electro-pneumatic actuation of segment slider valves of Heinrich Welb & Söhne act as gates under silo discharge for sands and granular bulk materials. Another area of use is the dosing from silos into balances.
• There are multiple options for regulating the outlet cross-section in order to maintain as accurate a dosing of bulk solids as possible:
• mechanically using a slider plate
• electro-pneumatically by only partial extension of the cylinder
• by oscillating flap actuation using the pneumatic cylinder
• Heinrich Welb & Söhne manufactures all segment slider valves as stable and durable welded structures.
• We also manufacture the segment slider valve in stainless steel if you request for it.
• The processing quality is of a high level due to an intensive monitoring in production

• The rotary gate valves of Heinrich Welb & Söhne cover a capacity range of 1 m³/h to 150 m³/h.
• They are made from a stable, welded steel structure.
• Sealing of shaft outlet is enhanced due to the use of lateral platform panels and the use of stuffing boxes and protective bushings on both the sides.
• The rotor can be sealed towards the stator with felt or Vulkolan strips.
• Round inlets / outlets are provided for if needed.
• The rotary gate valves of Heinrich Welb & Söhne are customised for the individual mounting conditions of the plants.
• The use of frequency converters makes the capacity range of the rotary gate valve fully variable.
• The individual chambers can be emptied using a purging air cleaning system if needed.
• We can also manufacture all the rotary gate valves in stainless steel.