唐纳森SDD DIF型爆破片
DIF型爆破片是一种复合式正拱型爆破片，由四个部分组成：
开槽穿孔金属层
密封膜片（通常采用PTFE，也可选用其他金属或非金属材料）
保护层
校准环
该爆破片专为法兰安装设计，特别适用于静态工况下的气体和液体介质，在低压领域表现卓越。DIF爆破片能在数毫秒内对过压作出响应并实现完全开启，因此是阀门保护的理想选择。为应对真空或背压工况，可配备专用支撑件。
此外，复合式唐纳森SDD爆破片还能提供压力与真空的同步双重保护。
| Model | DIF |
| Materials | Stainless steel, Alloy 201, Alloy 400, Alloy 600, Alloy 625, Alloy C276, Titanium |
| Membrane | PTFE, PFA, Stainless steel, Aluminium |
| Dimensions | DN 2”(15) – DN 40”(1000) |
| Rupture pressure | 0.5 – 5 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 70% |
| Vacuum support | Available |
| Fragmentation | No (membrane only) |
| Use under valve | Yes |
| Corrosion resistance | Good – can be protected with a PTFE membrane |
| Linings | Yes |
| Container | Mounted between flanges |
| Rupture sensor | Electrical, Magnetic, Inductive, Optical |
| PED Certification [CE STAMP] | Available |
| ATEX EX II 2 GD Certification | Available |
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