DIF Rupture Discs – Reliable Safety Devices for Industrial Plants

DonadonSDD offers DIF rupture discs that are specifically designed to protect atmospheric vessels and industrial plants from sudden overpressure and/or vacuum variations that can cause severe damage. The DIF rupture discs are consisting of 3 or more components parts that form a single unit disc that can be inserted directly between flanges.

Keyfeatures & technical benefits

High Certification Standards:

Our DIF rupture discs are certified to meet the highest international standards, including PED 2014/68/UE (CE STAMP), ATEX EX II 2 GD (CE STAMP), PER 2016 UK Statutory Instruments 2016 No 1105 (UKCA STAMP), and CU TR 032 (EAC STAMP).

Technique:

Composed of a slotted, perforated metal part, a seal membrane (usually in PTFE but available in various metallic or non-metallic materials), a protection section, and a calibration ring.

Easy Installation:

Designed to be installed in customer’s flanged coupling directly.

Applications:

Ideal for use with gas and liquids under static conditions and low pressure.

Non-Fragmenting:

Responds to excessive pressure with total opening in milliseconds without fragmentation of metallic layers.

Vacuum Resistance:

Specific support for vacuum and back-pressure protection are available on request.

Why Choose DonadonSDD?

  • DonadonSDD DIF rupture discs are designed to be mounted between flanges, providing an easy and secure installation.
  • The discs are ideal for use with gas and liquids under static conditions and low pressure, making them highly versatile.
  • The discs respond rapidly to excessive pressure, preventing damage to your plant.
  • Double way disc option: Protects against vacuum and pressure simultaneously (even with two different set pressures).
MODELDIF
MATERIALSStainless steel, Alloy 201, Alloy 400, Alloy 600, Alloy 625, Alloy C276, Titanium
SEAL MEMBRANEAvailable in PTFE or PFA
DIMENSIONSFrom DN25 (1 inch) to DN1000 (40 inches)
RUPTURE PRESSURE0.005 – 10 bar g (Depending on size and material)
TOLERANCEfrom +/- 5 % to +/- 40%
OPERATING TEMPERATUREmax 260°C (membrane in PTFE or PFA)
FRAGMENTATIONNo (membrane only)
USE IN COMBINATION WITH PSVSuitable
OPERATING MARGINCan reach up to 70% depending on service conditions.
RESISTANCE TO VACUUM PRESSUREYes, Vacuum Support Required
DOUBLE WAY DISC OPTIONAvailable, even with two different set pressures
CORROSION RESISTANCEVery Good
LININGSAvailable in PTFE and PFA
INSTALLATIONDirectly between flanges
RUPTURE SENSORElectrical, Magnetic, Inductive, Optical
Performance Attributes
Operation Ratio
up to 70%
Non Fragmenting
yes (membrane only)
Vacuum Resistant
yes, Vacuum Support Required
Sanitary
no
Process Media
Liquid
yes
Vapor/Gas
yes

Certifications

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Safety devices such as rupture discs and explosion venting panels are essential for modern, efficient industrial plants.

Let’s find out together which ones are ideal for you!
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