Graphite Discs | DonadonSDD | Philippopoulos s.a.

Graphite Discs | DonadonSDD

Name: Graphite Discs | DonadonSDD
Brand: Donadon SDD
SKU: Graphite Discs | DonadonSDD

DonadonSDD Graphite Rupture Disks

DonadonSDD G-GA, G-GM, and G-GR graphite rupture disks are specified for overpressure protection in vessels, reactors, tanks, and piping systems. These are single-use devices: upon reaching the rated burst pressure, the disk fully opens and must be replaced. Fragmentation occurs on activation, so these disks are not intended for installation beneath safety relief valves.

Materials and Operating Limits

High-purity graphite is selected for corrosive media, low burst pressures, and minimal burst pressure sensitivity to temperature changes. GM and GR variants use graphite impregnated with phenolic resins for improved tightness.

DN: 25–300 for G-GA, 25–600 for G-GM, 25–200 for G-GR
Burst pressure: 0.017–15 barg, depending on diameter and construction
Tolerance: ±10% to ±20%
Operating ratio: up to 75% of burst pressure
Temperature: -60 to +300°C for G-GA, -60 to +180°C for G-GM / G-GR
Certification: PED / CE available
Leak detection: electrical sensor available

G-GA / G-GM / G-GR Variant Differences

G-GA: Replaceable graphite disk in stainless steel ring, direct flange installation. No vacuum support.

G-GM: Monoblock graphite disk, direct flange mounting. Vacuum support available, required for burst pressures below 1.7 barg.

G-GR: Replaceable disk in graphite or metal holder. Graphite holder rated up to 10 barg, metal holder up to 15 barg.

Applications

Suitable for chemical processes, corrosive gases or liquids, storage tanks, reactors, and lines requiring immediate pressure relief without mechanical reclosing. PTFE liners can be specified for enhanced chemical resistance.

Selection Considerations

Selection requires process medium, temperature, operating pressure, burst pressure, DN, flange details, vacuum presence, backpressure, and sensor requirements. After activation, the disk must be replaced and the cause of overpressure investigated.

Description

DonadonSDD replaceable GA graphite rupture discs are mounted on a stainless steel ring that can be directly inserted between flanges.

This disc is very versatile because combines the mechanical robustness of a steel holder and the characteristics of graphite discs (resistant to aggressive fluids and low bursting pressure sensitivity to temperature variations).

Disc material is high purity graphite. Opening is total but with fragmentation. Vacuum support is required for rupture pressures below 1.7 barg. Discs are self-supporting at higher calibrations.

Model	G-GA
Materials	Graphite and Stainless steel
Dimensions	DN 25 – DN 300
Rupture pressure	0.017 – 15 bar g (depending on diameter)
Tolerance	from +/- 10 % to +/- 20%
Operating temperature	from -60 °C to 300 °C
Operating margin	up to 75%
Vacuum support	Not Available
Fragmentation	Yes
Use under valve	No
Corrosion resistance	Very good - can be protected with a PTFE membrane
Linings	No
Container	Included, mounted between flanges
Seals	Available in graphite
Rupture sensor	Electrical
PED Certification [CE STAMP]	Available

DonadonSDD GM monoblock graphite rupture discs are versatile and suitable for numerous applications and can be directly inserted between flanges.

Graphite rupture discs are very resistant to aggressive fluids and low bursting pressure sensitivity to temperature variations. Discs are made of very high purity graphite impregnated with phenolic resins in order to make the product impermeable.

Opening is total but with fragmentation.

Vacuum support is required for rupture pressures below 1.7 barg. Discs are self-supporting at higher calibrations.

Model	G-GM
Materials	Graphite
Dimensions	DN 25 – DN 600
Rupture pressure	0.017 – 15 bar g (depending on diameter)
Tolerance	from +/- 10 % to +/- 20%
Operating temperature	from -60 °C to 180 °C
Operating margin	up to 75%
Vacuum support	Available
Fragmentation	Yes
Use under valve	No
Corrosion resistance	Very good - can be protected with a PTFE membrane
Linings	No
Container	Included, mounted between flanges
Seals	Available in graphite
Rupture sensor	Electrical
PED Certification [CE STAMP]	Available

DonadonSDD replaceable GR graphite rupture discs are mounted on graphite (available for pressures up to 10 bar g) or metal (up to 15 bar g) holders. These discs are versatile and suitable for numerous applications.

Opening is total but with fragmentation.

Vacuum support is required for rupture pressures below 1.7 barg. Discs are self-supporting at higher calibrations.

Model	G-GR
Materials	Graphite
Dimensions	DN 25 – DN 200
Rupture pressure	0.017 – 15 bar g (depending on diameter)
Tolerance	from +/- 10 % to +/- 20%
Operating temperature	from -60 °C to 180 °C
Operating margin	up to 75%
Vacuum support	Available
Fragmentation	Yes
Use under valve	No
Corrosion resistance	Very good - can be protected with a PTFE membrane
Linings	No
Container	GR, HI/A
Seals	Available in Graphite and Cork
Rupture sensor	Electrical
PED Certification [CE STAMP]	Available

Certifications

Quality certifications are a guarantee. DonadonSDD has obtained the following certifications.

DonadonSDD provides high-quality products that meet the safety requirements of the systems where they are installed. The organisation and procedures fully comply with the ISO 9001 standard to ensure the utmost quality for our products. Our quality system has also met the stringent requirements of the UNI EN 9100 standard concerning design, development, and manufacture of rupture discs for the aerospace industry.

DonadonSDD products – such as rupture discs, explosion venting panels, and rupture indicators – are certified in compliance with PED directive 2014/68/EU or ATEX directive 2014/34/EU. The rupture discs alone are manufactured, tested, and certified in compliance with ASME directive, Section VIII, Division 1 and carry the relative UD stamp.

DonadonSDD is subject to inspections carried out by 3-A Sanitary Standard, Inc. (3-A SSI) so that our rupture discs can meet the highest sanitary standards.

Upon request, our clients can ask independent inspectors to certify single batches.

DOWNLOAD CERTIFICATIONS