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Donadon SDD manufactures venting panels in special executions according to European Directive 94/9/CE (ATEX), certified Ex II 2 GD. Therefore these panels may be used in locations where the presence of explosive atmospheres is probable (locations classified as category 1, 21, 2 and 22).
Venting panels available in ATEX certified execution are both the rectangular models (PS/Ex/R) and the circular models (PS/Ex/C).
For these applications we recommend the intrinsic safety alarm system NAM 01 certified Eex ia IIC T6 according to European Directive 94/9/CE (ATEX).
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| Elfab offers a comprehensive range of rupture discs for protection against the hazards of dust explosion. |
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Donadon SDD manufactures rupture discs in special executions according to European Directive 94/9/CE (ATEX), certified Ex II 2 GD. Therefore these discs may be used in locations where the presence of explosive atmospheres is probable (locations classified as category 1, 21, 2 and 22).
Rupture discs available in ATEX certified execution are the following models: SCD, DCD, DIF, TCD and Y90.
For these applications we recommend the intrinsic safety alarm system NAM 01 certified Eex ia IIC T6 according to European Directive 94/9/CE (ATEX).
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Donadon SDD manufactures metal and composite rupture discs according to norm EN ISO 4126-2. Available models are recommended for use with liquids and gases under static, cyclic or pulsating conditions.
Donadon discs are also recommended for protection of pressure relief cocks.
Installation may be in disc holders, directly between flanges, or on threaded professional fittings.
Standard range covers diameters from ½” to 400”, rupture pressures from 0,01 to 4000 bar, operating temperatures from -196 to + 450°C.
Standard materials are Stainless Steel, Aluminium, Nickel, Monel, Inconel, Hastelloy; membranes are available in PTFE or metal.
Accessories like vacuum supports, linings, calibration rings, rupture indicators and manometers are also available.
Donadon SDD is glad to address special requirements and to develop designs in collaboration with customers
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The Flat Slotted Lined tension-loaded composite bursting disk offers and economic solution to many very low pressure applications.
This non fragmenting design is offered in an extensive size and material range, bringing, enhanced protection, reliability and leak-tightness through its unique tri-membrane construction. |
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| Specialists in rupture discs (rupture disks), bursting discs and the isolation of pressure relieve cocks, Fike has nearly 60 years of experience in understanding pressure relief systems. Fike has specific rupture disc products for different applications, rupture isolation procedures for pressure relief valves (safety relief valves), rupture disc calculation tools and rupture disc accessories and holders. |
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Donadon NAM 03/HT alarm system is recommended for installation with Donadon SDD rupture discs.
NAM 03/HT Alarm System is a proximity sensor installed in the disc holder downstream the disc in order to detect the bursting of the disc.
This magnetic field sensor is activated by changes in magnetic field. A target with a permanent magnetic is supplied with the disc; when the disc bursts the magnet is displaced and the sensor activated.
Replacement discs are supplied with a new target.
NAM 03/HT is an intrinsic protection device certified ATEX II 2GD Eex m IIC T4/T6 and ATEX II 1GD Eex ia IIC T3/T6and therefore may be used in locations where potentially explosive atmospheres with gas, vapors or mist are continually present (locations classified zone 0; 20 and 1; 21 and 2; 22 by European Directive 94/9/CE (ATEX)).
NAM 03/HT is normally supplied with 2m bipolar cable IP 67.
The cables of the alarm system must be connected to the plant’s safety system through an intrinsic safety barrier adequate to the location.
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| Integral Flo-Tel™ provides an excellent technical solution for identifying when a bursting disc functions within arduous operating conditions. After bursting, the disc is the only element to be replaced, thus eliminating expensive re-wiring costs. |
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| Rupture Disks are designed for reliable emergency relief of excess pressure since they instantaneously rupture at a specific predetermined pressure range. |
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Donadon SU rupture disc is a sealed unit formed by a conventional disc with solid calibrated section mounted in a threaded connector suppliers.
This unit has been designed in order to make easy and reliable mounting small discs in plant environment and to simplify the handling without need of specialized manpower.
SU disc is suitable for use with gases and liquids in static or pulsating conditions.
It reacts to over-pressure in a few thousands of a second and is recommended for protection of plants, equipments and containers.
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The Y90 DONADON rupture disc is a compression (or reverse) disc peripherally scored.
The Y90 represents the high technology in the sector: the camber of the convex disc is not modified by the operating pressure except on reaching reverse pressure. Therefore this device works with ratios of up to 90% between operating and rupture pressure and withstands thousands of cycles without jeopardising its reliability.
At the moment of reversion the disc bursts in a few thousands of a second rupturing along the scored line without fragments
Y90 disc has lower sensitivity to variations in temperature than conventional discs and therefore is very useful in applications with large temperature variations.
It is especially suitable for use with gas and liquids, and for protecting pressure relief cocks
The wide choice of materials and the thickness used make the Y90 disc very resistant to corrosion. Greater protection can be obtained with a PTFE lining, which can be applied to the process side of the disc.
Vacuum support is normally not required
Available in special execution certified Ex II 2GD according to European Directive 94/9/CE (ATEX)
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Plug and Union devices bring versatility and facilitate installation of small manufacturer of bursting discs, requiring no flanges they are simply connected into the system requiring protection.
Elfab offer the economics and convenience of standard Plug and Union devices, which are capable of taking a range of replaceable bursting disc types enabling an extensive range of burst pressures to be achieved. In addition to the standard range, Elfab produces a wide range of customer specific design specials as disposable devices to meet the diverse needs of our customer base. |
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The DONADON “GM” mono-block graphite rupture disc is a versatile disc suitable for numerous applications and can be directly inserted between flanges.
It conforms to EN ISO 4126-2 norm
TRIGGER SPEED: This disc opens immediately and totally.
OPERATING MARGIN: Good operating margin. Ratio between operating pressure and rupture pressure up to 80%.
FRAGMENTATION: Total fragmentation.
CORROSION: Good resistance to aggressive fluids.
VACUUM: Vacuum support is required only for rupture pressures below 1.7 Bar. At higher calibrations the disc is self-supporting.
Nominal size: from ND 15 to ND 600
Bursting pressure: from 0.017 to 10 Bar at 22°C
Bursting temperature: 370°C
Bursting tolerance:
- below 1 Bar: ± 0,05 Bar
- over 1 Bar: ±10%.
Standard material: high purity graphite impregnated with phenol resins
Accessories: professional seals, support for vacuum, linings and rupture Indicator
Holder: Not required (installed directly between flanges) |
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Universal Arma-Gard™ is an engineered graphite bursting disc device. Its patented design overcomes problems associated with damage of conventional graphite bursting discs, caused by poor storage, handling and installation practice; as it is not adversely affected by misaligned, poorly supported pipework, over or uneven torquing of pipe flange manufacturers of bolts. This is achieved through the use of a steel armoured ring, which protects the graphite bursting element, whilst allowing the clampage necessary for correct sealing.
The Universal Arma-Gard™'s monobloc type design requires no holder, enabling direct professional fitting between flanges.
Unlike conventional monobloc designs the Universal Arma-Gard™ eliminates the possibility of side wall bursts. All these added benefits do not detract from excellent corrosion resistance and low pressure capability normally associated with graphite bursting discs. |
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Donadon LPD rupture disc is a composite conventional disc formed by four parts:
• A slotted, perforated metal part
• A professional seal membrane (usually in PTFE)
• A protection section
• A calibration ring with blades to improve membrane opening
Designed to protect processing and industrial storage tanks, atmospheric vessels and silos against implosion or overpressure conditions.
It reacts to over-pressure in a few thousands of a second with total opening and without fragmentation.
LPD discs are a simple, reliable, accurate and economical solution for applications requiring extremely low positive and/or negative pressure protection.
Their primary use is in storage tanks with low design pressures in applications where contamination is unacceptable.
Donadon SDD model LPD discs offer non-fragmenting opening and avoid product contamination.
LPD discs may be installed directly between flanges avoiding the requirement for holders with blades and can be offered to meet a broad range of non standard specifications and applications.
LPD discs can be provided with:
• Dual protection (vacuum / pressure)
• Vacuum / counterpressure support
• Burst detector, ATEX approved, giving immediate indication of burst occurrence
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Bio-Gard is a low pressure, compression-loaded, scored reverse bursting disc, designed specifically for protection of aseptic and hygienic plant. Bio-Gard has a smooth uninterrupted surface finish to reduce microbial load and maximise steam sterilisation (SIP) and clean in place (CIP) procedures.
Bio-Gard is available with Elfab's Bio-Tel hygienic senor, designed for use with this product and supplied with its own detector lead enabling easy installation and maintenance. |
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Opti-Gard™ is an advanced, reverse acting (compression loaded) bursting disk, peripherally scored on the vent side for accurate burst control. Elfab offer Opti-Gard™ as a single disc solution across a wide range of burst pressures and sizes.
With a 95% operating to burst pressure ratio, and performance tolerance of 3%, Opti-Gard™ offers the highest performance characteristics available for liquid, gas or vapour.
Standard features include: - non-invasive burst detection system, manufactured in corrosion-resistant Hastelloy and built in orientation enforcement. |
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| This range of composite (compression loaded) reverse discs are ideal for the relief of vacuum and over-pressure situations. The patented design overcomes the requirement for a holder complete with blade for opening and allows for instantaneous system relief at ultra low pressures. The Posi-Gard and Vac-Gard will attain full relief within 1 second from the start of reverse. Both products offer non-fragmenting opening and, as a result of their modular content, can be offered to meet a broad range of non standard specifications / applications. The Posi-Gard and Vac-Gard can be provided with an ATEX approved burst detection device. |
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Descriptions:
MPI extruder rupture discs are used for reliable economical pressure relief in plastic supplier of extruders.
The Inconel Disc material ensures they will instantly rupture at a specific pressure over a wide temperature range. |
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