Conidur® Hole Sheets – General Information

CONIDUR® hole sheets are sheets with a special hole shape. The upper and lower side of the CONIDUR® hole sheet have different characteristics. The special manufacturing process enables the finest perforations in initial sheet thicknesses, which can be a multiple of the hole diameter. Through cold forming, the CONIDUR® hole sheets indicate very good wear resistance, which can still be improved through surface treatment.
Hein Lehmann India Pvt. Ltd. provides the Conidur® pierced screen family of products in India. Manufactured by Hein Lehmann, Gmbh it is used widely as fluid bed plate, hammer mill screens, filter screen and many other applications.
The unique Conidur® pierced hole can be changed by various surface treatments to meet the requirements of the application. A “raised hood” over the perforation provides a directional airflow for fluid bed plates and a sharp leading edge for particle size reduction screens. Removal of the “hood” by surface grinding turns the material into a very efficient filtering/screening media.
CONIDUR® hole sheets are successfully used in the following industrial areas (among others):

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Available Materials
Here is a list about the available materials of the CONIDUR® sheets with Material No., Short term uniform in Germany and Europe as well as the internationally usual:
Material standards
Germany and Europe International: U.S.A. & others
Material-No EN 10027 T.2 Short term EN 10027 T.1 UNS-No AISI/SAE/ASTM
1.0347 DC03 (RRSt 13) G10080 1008
1.4016 X6Cr17 S43000 430
1.4301 X5CrNi 18-10 S30400 304
1.4306 X2CrNi 19-11 S30403 304L
1.4541 X6CrNiTi 18-10 S32100 321
1.4401 X5CrNiMo 17-12-2 S31600 316
1.4404 X2CRNiMo 17-12-0 S31603 316L
1.4571 X6CrNiMoTi 17-12-2 S31635 316Ti
1.4539 X1NiCrMoCuNTi 25-20-5 N08904 ‘904L’
2.4360 NiCu30Fe N04400 Monel 400′
2.4610 NiMo16Cr16Ti N06455 ‘Hastelloy C-4’
(3.7025) Pure – Titanium, Ti 99,5 R50250 Ti Grade 1
Finishing, aftertreatment of CONIDUR® hole sheets
CONIDUR® fine hole sheets are supplied:
  • Unrolled
  • Rolled
  • Ground
  • Surface hardened
  • Electrolytically deburred and polished
Chemical industry
  • as a filter element in plates and pipes
  • as a centrifugal screen
  • as a screening element in mills
  • as a gas-distribution deck for fluidised bed units
Food industry
  • as a dewatering and working screen for sugar and starch centrifugals
  • as a screen panel in mills
  • as a separating element in fruit juice manufacture
  • for press moulds in the cheese industry
  • as a gas-distribution deck for fluidised bed units
Pharmaceutical industry
  • for coating systems
  • as a gas-distribution deck for fluidised bed units
  • for pneumatic transport desks
Processing Technique
  • for milling of plastics
  • for milling of grain dish
  • with processing of feeding stuff
  • For drying/cooling of foundry sand
  • as a fluidized bed for sand processing
Further applications
  • as a filtering surface
  • as a screening surface
  • as a ventilation element for silo and hopper bottoms
  • as a distribution deck for pneumatic conveying channels