DonadonSDD DCD rupture discs are composite conventional discs formed by three parts:
- a slotted, perforated metal part
- a seal membrane (usually in PTFE but also available in many other metallic or non-metallic materials)
- a protection section
It is excellent for use with gas and liquids in static conditions and excellent for low pressures.
DCD discs react to excessive pressure with total opening in a few milliseconds without fragmentation. They are therefore recommended for valve protection. Supports may be provided for vacuum or counter-pressure protection.
Composite DonadonSDD rupture discs may also be used for simultaneous protection from pressure and vacuum.
| Model | DCD |
| Materials | Stainless steel, Alloy 201, Alloy 400, Alloy 600, Alloy 625, Alloy C276, Titanium |
| Membrane | PTFE, PFA, Stainless steel, Aluminium |
| Dimensions | DN ½”(15) – DN 40”(1000) |
| Rupture pressure | 0.01 – 110 bar g (depending on material and diameter) |
| Tolerance | from +/- 5 % to +/- 20% |
| Operating temperature | membrane in PTFE/PFA max 265°C, up to 480°C (depending on the membrane) |
| Operating margin | up to 80% |
| Vacuum support | Available |
| Fragmentation | No (membrane only) |
| Use under valve | Yes |
| Corrosion resistance | Good – can be protected with a PTFE membrane |
| Linings | Yes |
| Container | HI/A, HI/P, HI/F, HTC |
| Rupture sensor | Electrical, Magnetic, Inductive, Optical |
| PED Certification [CE STAMP] | Available |
| ATEX EX II 2 GD Certification | Available |
