Discover our digital solutions. Schenck process NEXT logo


This is a light duty valve specifically designed for infrequent operation, Mucon® BD Series Iris Diaphragm Valve can be used for both in-line and open discharge operations. The Series BD Iris Valve are suitable for handling materials with bulk densities up to 560 kg/m³. Also, the BD offers a simplified construction when compared to other in-line valves in the Mucon® range. This simplified construction offers the customer reduced cost, size and weight.


  • For valve sizes between 50mm and 200mm, the iris valve body parts are made from aluminum with a gunmetal control ring
  • For valve sizes 250mm to 300mm, the valve is manufactured from aluminum and incorporates a zinc aluminum control ring
  • 50mm and 80mm valves are fitted with thumbscrew locking
  • All other sizes have nylon triggers and 316 stainless steel fasteners


  • With use of polyurethane coated nylon liner to protect fish in transit and during discharge
  • As a double flanged outlet valve for intermediate bulk containers (IBCs)
  • An outlet valve for dust collection hoppers
  • Also for the control of (not shut off) airflow in ventilation ducting


  • Thumbscrew locking on all trigger operated iris valves – 100mm diameter and above
  • All valve bodies can be either produced half notched or fully notched
  • We can offer Flurene 177 or other coatings for valves being used in corrosive environments
  • Provided an anti-static diaphragm is used
  • Can be certified for ATEX zone 21D and 22D


  • Low cost
  • Light in weight
  • No leakage into atmosphere
  • Perfect for lighter duty materials
  • Slim design
  • Can be used with a wide range of diaphragms


  • Offers a double diaphragm for in-line applications, preventing material leakage to the atmosphere
  • This Series BD Iris Valve is suitable for lighter duty materials (550-600 kg/m³)
  • Available as standard with thumbscrew locking for 50mm & 80mm bore dimensions, giving infinite flow control
  • Trigger locking mechanism offered on other sizes
  • End users can choose from a large range of diaphragms to suit their specific application
  • Bore sizes are available from 50mm to 300mm

We’re there for you

Partnership for us means always being on hand to support you whenever and wherever you need us. With our global network of locations and expert partners, we make sure we are always right by your side.

Icon chat

Find your
nearest expert

Get the local support you need

Search now
Icon phone


Got a challenge, a question or some feedback for us?

Get in touch
Icon headset

Your Service

Need some urgent help? We’re here for you 24/7

Contact us now