H Series Iris Valve

Designed for rigid or semi-rigid IBCs where only open discharge is required

The Series H Iris valves were designed specifically for open discharge applications on outlets of small and intermediate bulk containers (Rigid IBCs).

The Series H is suitable for handling materials with bulk densities up to 900 Kg / m³.

This low cost, compact valve has been fitted to many thousands of IBC’s the world over. Its popularity with operators is owed to its ease of operation, reliability and excellent regulation of discharge rates.


  •  100mm, 250mm and 300mm diameter Iris valves are produced from gravity die cast aluminium with an anodized finish
  •  150mm and 200mm diameter Iris valves are produced form high pressure die cast aluminium with an anodized finish


  • Single diaphragm for dust tight closure
  • Simple construction suitable for materials up to 900 kg/m³
  • In-situ diaphragm adjustment
  • Hand operated
  • Quick release adapter. A disposable polythene liner can be incorporated with the quick release adapter
  • Large selection of diaphragms are available to suit a variety of applications
  • FDA approved contact parts
  • Bore sizes from 100mm to 300mm
  • 150mm & 200mm valves have multi notched bodies as standard


  • For creating a gland seal around large diameter pipes
  • For mounting on shot-blast cabinets to ensure no dust escapes to atmosphere when glanding on tubes
  • Will create a seal around pipes up to 75% of the valve bore diameter
  • Will handle a number of pipe diameters with the same valve


  • Non-jamming
  • 100% dust tight seal
  • Easy operation and maintenance
  • Diaphragm is inexpensive and easy to replace
  • Can be manufactured from stainless steel
  • Coatings available for corrosive environments
  • Diaphragms available from a number of materials in our standard range
  • Electric linear actuator can be supplied with a controller unit
  • Available in sizes 610mm (24″), 762mm (30″) and 1270mm (50″)

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