https://www.powtech.de/en/ausstellerprodukte/powtec19/product-10158698/ns-nanoscored

Donadon SDD has invested in research & development and in the purchase of new machines with last generation technology. The result of these undertakings is the series NS NanoScored.

These are very precise and reliable discs that can be manufactured in a very broad range of diameters and pressures.

Indeed, the new productive processes developed by Donadon SDD enable to obtain rupture discs that are:

resistant to fragmentation even for high burst pressures
with rupture pressures below 0.5 bar (7 psi g) even for DN40
This innovative technology has allowed Donadon SDD to implement new rupture discs entirely made with laser, not available on the market:
compression loaded with 6 or more radial scores (SCR/NS model)
compression loaded (reverse buckling) with Perimetral scoring (Y90/NS model)
tension loaded with 6 or more scores (SCD/NS model)
for standard or sanitary disc holders (Tri-clamp)
Both the production process and the brand are patented.

Donadon Safety Discs and Devices Srl (“Donadon SDD”) is today a higly reliable supplier of safety devices like rupture discs (bursting disks), venting panels and pressure relief valves.
Donadon SDD proposes a very competitive pricing list and takes advantage of the long experience in protection of plants and equipment from pressure variations gained in more than 50 years of activity, initially as “Ruggero Donadon” and later as “Officine Donadon”.
The manufacturing plant, recently enlarged and improved, has modern equipment and latest technology machines. Control laboratory is able to test discs up to DN 900 diameter (36 inches) at pressure up to 4000 bar and temperature up to 450°C.
Organization and procedures are designed to ensure reliable manufacturing of high quality products in compliance with ISO 9001-2000 standard as certified by Italcert.
Manufacturing capability and planning system allow fast and reliable service fulfilling the agreed delivery time.
Technical and Commercial services are able to support client requirements and develop the best technical and economical solutions.
Compact company organization, fully dedicated to pressure protection equipment, is highly flexible and able to satisfy both specialized requirements and mass-produced products.
Design, manufacturing and testing are in line with the requirements of European Directive 97/23/CE (PED) and certified for the protection of equipment under pressure.
In addition Donadon SDD is now able to supply also rupture discs, venting panels and pressure relief valves in line with the requirements of European Directive 94/9/CE (ATEX) and certified Ex II 2 GD for use in potentially explosive atmospheres.