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.
|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%|
|Fragmentation||No (membrane only)|
|Use under valve||Yes|
|Corrosion resistance||Good – can be protected with a PTFE membrane|
|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|