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The Mucon® JS Series Iris Diaphragm Valve is specifically designed for fitting to FIBC discharge stations to allow controlled  product discharge. The diaphragm controls the powder flow by  constricting the discharge neck of bulk containers and bags.


  • Body parts are made from aluminium
  • The control ring is produced from zinc aluminium
  • Fasteners are made from stainless steel
  • Triggers are nylon


  • Ideally suited for choking the necks and controlling the flow of material from big bags and FIBC
  • Also can be used for in-line and open discharge applications


  • Flow control is excellent
  • Design is slim
  • Controlled product discharge
  • Dust tight closure
  • Gentle, but sure cut off – this saves material being wasted
  • It is quick and simple to use
  • Ability to easily mount to big bag stations
  • Fixing hole options allow the valve to be used in-line


  • Suitable for handling material densities up to 1000 kg/m³
  • Concentric opening/closing for ideal flow characteristics
  • Multi-notched body for maximum flow control
  • Has a single diaphragm for dust tight closure
  • The tapered valve inlet prevents damage to the bag and aids flow
  • Fabric diaphragms ensure gentle, but sure shut off
  • Robustly constructed fixing holes in top and bottom flanges, at no extra charge
  • Bore sizes are 300mm with hand lever, and 380mm and 460mm with hand wheel
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Data sheets

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