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The strongest and most resilient of the Mucon® powered iris valve range is the Series E Iris Diaphragm Valve. It has extremely robust construction and reliable drive elements  making it suitable for the hardest of tasks. The drive is provided by a powerful pneumatic piston and pulley system.


  • Body parts are made from aluminum
  • A gunmetal control clamp ring
  • 316L stainless steel fasteners are fitted as standard


  • For use on the outlets of silos that handle heavy bulk solids. e.g. sand, cement, lime powder etc.
  • Linked to weigh scale set points for ‘bagging off’
  • For use in controlling (not shut off) air flow ventilation ducting
  • Use for big bag discharge where automatic actuation is needed
  • Used for in-line applications with no leakage to the atmosphere


  • 316 stainless steel contact parts can be supplied
  • Pre-piped and directly mounted pneumatic control 
  • Open and closed control solenoid valve (customer to specify voltage required)
  • Full trickle-feed facility, including trickle-feed switch and solenoid valves to give
  • Open, closed and adjustable trickle-feed position
  • Special cylinder and proximity sensors where the valve is required for ATEX zone 22D
  • In case of air or electrical failure automatic closure system can be offered
  • Special packages are available to suit hazardous environments
  • A variety of surface coatings to suit corrosive locations


  • Ability to handle and control the flow of very dense materials
  • Non jamming
  • There is no leakage into the atmosphere
  • Full bore opening -therefore, no product flow restriction
  • Suitable for frequent operation
  • Quick closing – and ideal for weighing applications


  • Double diaphragm iris valve is perfect for in-line applications with no leakage in to the atmosphere
  • The robust construction makes the Series E Iris Valve suitable for handling products in excess of 1600 kg/m³ In-situ diaphragm adjustment
  • The internal bearings and high quality materials enable frequent operation
  • Series E Iris Valves have a wide diaphragm selection to suit many specific applications
  • Bore sizes from 150mm to 450mm
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Data sheets

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