Mucon Oyster Feeder Valve Controls Flow
Material: Pharmaceutical powders
• Feeder valve capable of discharging 88 Ltrs of product in 20 seconds
• Tri-clamp end connections to fit 12” ferrules
As drive speed increases, the rate of increase of the discharge volume of a feeder valve decreases, as the pockets fill and empty less efficiently. For high volume discharge, there is no alternative to having a large rotor.
|Nominal Valve Size:||150||200||250||300||350|
|Volume transferred per cycle: (6 pockets) cc3||1.230||3.300||6.854||12.286||17.888|
|Density of product||0.50||0.50||0.50||0.50||0.50|
|Theoretical weight transferred per cycle (gr.)||615||1.650||3.427||6.143||8.944|
|Nominal cycles/min. (suggested MAX speed)||35||30||25||20||18|
|Notional Eff. Ratio||80%||80%||80%||80%||80%|
|Estimated weight (Kg) per Hour||1.034||2.376||4.112||5.897||7.728|
|Estimated Volume in 20s (Ltr)||11||26||46||66||86|
In the case in question, it was clear that nothing less than a DN350mm rotor would meet the client’s requirements but this had to be shoehorned into a 12” chute.
The Solution: Making use of the fact that the inside surfaces of the Mucon Oyster™ Feeder valve are machined spherical to match the shape of the rotor and assure full control of product flow at all times, the team designed a custom-built Feeder valve with DN350 rotor and 12” Tri-clamp end connections.
High precision CNC machining of the valve body and the rotor ensured a close fit between the rotor blades and the valve body. This was possible owing to the careful choice of a highly stable PEEK material for the drive bushings.
All wetted parts were polished to a high mirror finish.
The Results: The use of the Mucon Oyster™ High Volume Feeder Valve enabled the client to achieve the discharge volumes of a substantially larger valve at acceptable drive speeds while retaining the same nominal passage size.