Rapture Discs

Rupture discs are non-reclosing overpressure protection devices used on pressure vessels, reactors, silos, heat exchangers, piping, and steam, gas, and liquid systems where rapid pressure relief is required. The range includes Donadon SDD and Striko designs, with metallic, graphite, low-pressure, forward-acting, reverse-buckling, sanitary, and bi-directional discs, together with holders, burst indicators, leak detection devices, and explosion vent panels.

Disc selection is based on burst pressure, operating temperature, allowable operating ratio, manufacturing burst tolerance, process phase, pressure cycling or pulsation, vacuum or back pressure, corrosion resistance, and non-fragmentation requirements. Forward-acting discs are applied in gas and liquid service under static or pulsating conditions, with options for PTFE or PFA liners, vacuum support, and installation upstream of a safety relief valve where the disc type is suitable. Reverse-buckling discs are used where higher operating margins, improved fatigue resistance under pressure cycling, operation without vacuum support, and controlled opening with limited fragmentation are required.

When installed in combination with a safety relief valve, a rupture disc can isolate the valve from corrosive, polymerizing, toxic, or fouling media, provided that the effects on inlet and back pressure are correctly calculated, the intermediate space is monitored, and PED or ASME code requirements are met. Available materials include stainless steel, Alloy 201, 400, 600, 625, Alloy C276, titanium, PTFE/PFA-lined constructions, and graphite. Pressure capability ranges from low-pressure mbar service to high-pressure applications, depending on disc diameter, material, temperature, and disc geometry.

Explosion vent panels are used on dust collectors, dryers, silos, filters, mixers, and conveying ducts to relieve explosion overpressure generated by combustible dust or gas deflagration. Burst indicators and leak detection sensors provide remote confirmation of disc activation or loss of tightness, supporting maintenance planning, shutdown logic, and process safety monitoring.

Graphite Discs | DonadonSDD | Philippopoulos s.a.

Graphite Discs | DonadonSDD

Graphite Discs | DonadonSDD
Donadon SDD
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...
View
Low Pressure Rupture Discs | DonadonSDD | Philippopoulos s.a.

Low Pressure Rupture Discs | DonadonSDD

Low Pressure Rupture Discs | DonadonSDD
Donadon SDD
DonadonSDD Low Pressure Rupture Discs DonadonSDD DIF and LPD low pressure rupture discs are used for overpressure or vacuum protection in vessels, tanks, silos, pipelines, and process units. These are single-use safety devices: after activation, replacement is required and the cause of activation must be investigated. DIF Type The DIF is a composite,...
View
Ns Nanoscored Rupture Discs | DonadonSDD | Philippopoulos s.a.

Ns Nanoscored Rupture Discs | DonadonSDD

Ns Nanoscored Rupture Discs | DonadonSDD
Donadon SDD
DonadonSDD NS Nanoscored Rupture Discs DonadonSDD NS Nanoscored are metallic rupture discs featuring controlled micro-scoring for precise burst performance. Designed for overpressure protection of vessels, pipelines, reactors, and safety valves, these discs open without fragmentation and enable full venting within milliseconds. Types: KRD / SCD / SCR /...
View
Forward Acting Rupture Discs | DonadonSDD | Philippopoulos s.a.

Forward Acting Rupture Discs | DonadonSDD

Forward Acting Rupture Discs | DonadonSDD
Donadon SDD
DonadonSDD Forward Acting Rupture Discs DonadonSDD forward acting rupture discs are designed for process pressure acting on the concave side of the disc. These devices provide direct overpressure relief in vessels, tanks, reactors, pipelines, and are also used to protect safety valves from process media, corrosion, or fouling. Replacement is required...
View
Reverse Acting Rupture Discs | DonadonSDD | Philippopoulos s.a.

Reverse Acting Rupture Discs | DonadonSDD

Reverse Acting Rupture Discs | DonadonSDD
Donadon SDD
DonadonSDD Reverse Acting Rupture Disks The DonadonSDD KRD, SCR, and Y90 are reverse acting rupture disks. Operating pressure is applied to the domed side; the disk inverts and opens upon reaching the set burst pressure. After activation, the disk opens fully within milliseconds and must be replaced. Types and Differences KRD: Reverse acting,...
View
Sanitary Rupture Discs | DonadonSDD | Philippopoulos s.a.

Sanitary Rupture Discs | DonadonSDD

Sanitary Rupture Discs | DonadonSDD
Donadon SDD
DonadonSDD Sanitary Rupture Discs DonadonSDD sanitary rupture discs are designed for pressure relief in pharmaceutical, food, beverage, and biotech process lines where dead volume must be minimized. Installation is via Clamp / Tri-Clamp / Tank Connection interfaces, using PTFE gaskets compliant with FDA, USP Class VI, 3-A, and EU 10/2011 standards....
View
Double Way Rupture Discs | DonadonSDD | Philippopoulos s.a.

Double Way Rupture Discs | DonadonSDD

Double Way Rupture Discs | DonadonSDD
Donadon SDD
DonadonSDD Bidirectional Rupture Discs DonadonSDD DIF and LPD bidirectional rupture discs are designed for equipment protection against both overpressure and vacuum conditions. These are single-use safety devices: after activation, the disc must be replaced and the root cause of the rupture investigated as part of standard maintenance procedures. DIF...
View
Sealed Unit Rupture Discs | DonadonSDD | Philippopoulos s.a.

Sealed Unit Rupture Discs | DonadonSDD

Sealed Unit Rupture Discs | DonadonSDD
Donadon SDD
DonadonSDD SU/M and SU/T Sealed Rupture Disk Units The DonadonSDD SU/M and SU/T are pre-assembled rupture disk units integrated into a threaded stainless steel connector. The assembly includes a calibrated rupture disk within the connector body, allowing direct installation into process lines without a separate holder. After activation, the entire unit...
View
Rupture Discs Holder | DonadonSDD | Philippopoulos s.a.

Rupture Discs Holder | DonadonSDD

Rupture Discs Holder | DonadonSDD
Donadon SDD
DonadonSDD Rupture Disc Holders DonadonSDD rupture disc holders are engineered for correct seating, centering, and operational support of rupture discs in pressure lines, vessels, reactors, tanks, and relief systems. Selection is based on disc type, flow direction, piping connection, process media, and requirements for cleaning or corrosion resistance....
View
Explosion Venting Panels | DonadonSDD | Philippopoulos s.a.

Explosion Venting Panels | DonadonSDD

Explosion Venting Panels | DonadonSDD
Donadon SDD
DonadonSDD Explosion Vent Panels DonadonSDD explosion vent panels are non-reclosing pressure relief devices designed for process equipment where there is a risk of dust or gas deflagration. When the set opening pressure (pstat) is exceeded, the panel ruptures, venting overpressure in a predetermined safe direction. Construction and Technical Data Standard...
View
Rupture Indicators - Electric Rupture Indicators | DonadonSDD | Philippopoulos s.a.

Rupture Indicators - Electric Rupture Indicators | DonadonSDD

Rupture Indicators - Electric Rupture Indicators | DonadonSDD
Donadon SDD
DonadonSDD Electrical Rupture Disc Indicators DonadonSDD electrical indicators are used to confirm the opening of rupture discs or explosion vent panels. Operation is based on a conductive copper circuit: when the relief device activates, the circuit is interrupted, sending a signal to a PLC, DCS, alarm panel, or safety system. Connection is via an...
View
Rupture Indicators - Magnetic Rupture Indicators | DonadonSDD | Philippopoulos s.a.

Rupture Indicators - Magnetic Rupture Indicators | DonadonSDD

Rupture Indicators - Magnetic Rupture Indicators | DonadonSDD
Donadon SDD
Magnetic Rupture Disc Indicator NAM 03/HT DonadonSDD The NAM 03/HT is designed for rupture disc burst detection in industrial pressure relief systems. The magnetic proximity sensor is installed downstream of the rupture disc, within the threaded port of the disc holder. A permanent magnet, supplied with the disc, shifts position upon disc activation,...
View
Rupture Indicators - Inductive Rupture Indicators | DonadonSDD | Philippopoulos s.a.

Rupture Indicators - Inductive Rupture Indicators | DonadonSDD

Rupture Indicators - Inductive Rupture Indicators | DonadonSDD
Donadon SDD
Inductive Rupture Disc Indicator NAM 05 DonadonSDD The NAM 05 is an inductive proximity sensor designed for electrical confirmation of rupture disc or explosion vent panel activation. It is installed downstream of the pressure relief device and is used when a status signal must be transmitted to PLC, DCS, SIS, or alarm panels via an intrinsic safety...
View
Rupture Indicators - Optic Fibre Rupture Indicators | DonadonSDD | Philippopoulos s.a.

Rupture Indicators - Optic Fibre Rupture Indicators | DonadonSDD

Rupture Indicators - Optic Fibre Rupture Indicators | DonadonSDD
Donadon SDD
OFI 04 / OFI 07 Fiber Optic Indicators DonadonSDD The OFI 04 and OFI 07 fiber optic indicators are designed for electronic confirmation of rupture disc opening, without electrical or moving parts in contact with process equipment. Fiber optic terminations are mounted in the holder and connected to an amplifier. When the disc opens, light transmission...
View
Flat Metal Rupture Disc | Striko | Philippopoulos s.a.

Flat Metal Rupture Disc | Striko

Flat Metal Rupture Disc | Striko
Striko
Flat Metal Rupture Disks STRIKO SF-M STRIKO SF-M flat metal rupture disks are passive pressure relief devices for vessels, piping, reactors, and closed process systems. They are installed directly between flanges or in SHF / SHF Pro holders when improved seating, tightening repeatability, and easier replacement after activation are required. Technical...
View
Forward Acting Metal Rupture Disc | Striko | Philippopoulos s.a.

Forward Acting Metal Rupture Disc | Striko

Forward Acting Metal Rupture Disc | Striko
Striko
STRIKO Direct-Acting Metallic Rupture Discs STRIKO direct-acting rupture discs are non-reclosing pressure relief devices. The SZ-X series features a domed metallic design with cross-scored lines, operating in tension as differential pressure increases. Installation is between flanges using an SHZ holder or pre-torqued SHZ Pro. Operating Conditions Media:...
View
Reverse Acting Metal Rupture Disc | Striko | Philippopoulos s.a.

Reverse Acting Metal Rupture Disc | Striko

Reverse Acting Metal Rupture Disc | Striko
Striko
STRIKO Reverse Acting Rupture Disks – Metallic Types STRIKO SU-R / SU-C are reverse acting metallic rupture disks designed for overpressure protection in pressure vessels, reactors, and piping systems. Installation is between flanges using an SHU holder or a pre-torqued SHU Pro holder, allowing controlled torque and disk seating prior to installation....
View
Graphite Rupture Disc Series G2 / LPG2 | Striko | Philippopoulos s.a.

Graphite Rupture Disc Series G2 / LPG2 | Striko

Graphite Rupture Disc Series G2 / LPG2 | Striko
Striko
STRIKO G2 / LPG2 Graphite Rupture Disks The STRIKO G2 / LPG2 series consists of flat rupture disks manufactured from graphite impregnated with phenolic resin. These are non-reclosing pressure relief devices, intended for use in pipelines and vessels where the process media require enhanced chemical resistance. The LPG2 variant is designed for lower burst...
View
Graphite Rupture Disc Series G3 | Striko | Philippopoulos s.a.

Graphite Rupture Disc Series G3 | Striko

Graphite Rupture Disc Series G3 | Striko
Striko
STRIKO G3 Graphite Rupture Discs The STRIKO G3 series consists of monobloc graphite rupture discs, impregnated with phenolic resin and reinforced with stainless steel or special materials. These discs are installed directly between flanges without a separate holder, reducing mounting components and simplifying replacement after activation. Technical Data...
View
Aseptic Metal Rupture Disc | Striko | Philippopoulos s.a.

Aseptic Metal Rupture Disc | Striko

Aseptic Metal Rupture Disc | Striko
Striko
Aseptic Metal Rupture Discs STRIKO STRIKO aseptic rupture discs are specified for pharmaceutical, biotech, food, and beverage installations where pressure relief devices must not introduce dead space at the product interface. The design is compatible with Tri-clamp / clamp connections and does not require a separate holder. Variants and Operation...
View
Standard Rupture Disc Holder | Striko | Philippopoulos s.a.

Standard Rupture Disc Holder | Striko

Standard Rupture Disc Holder | Striko
Striko
Typical STRIKO SHF / SHZ / SHU Rupture Disc Holders The SHF, SHZ, and SHU holders are designed for the installation of STRIKO metallic rupture discs between flanges. The holder defines the disc seating, compression on the sealing surface, and the inlet/outlet geometry. In SHZ and SHU variants, a metallic seal is formed between the disc and the holder...
View
Pre-Torqued Holder | Striko | Philippopoulos s.a.

Pre-Torqued Holder | Striko

Pre-Torqued Holder | Striko
Striko
Pre-Torqued Rupture Disc Holder STRIKO The STRIKO pre-torqued holder is designed for metallic rupture discs where controlled assembly is required prior to installation in the process line. The disc is preloaded within the holder, minimizing errors from uneven flange tightening, misalignment, or disc rotation during maintenance. This approach supports...
View
Holder for Graphite Rupture Disc | Striko | Philippopoulos s.a.

Holder for Graphite Rupture Disc | Striko

Holder for Graphite Rupture Disc | Striko
Striko
HG2 Holder for STRIKO Graphite Rupture Disks The HG2 holder is designed for installation of flat graphite rupture disks STRIKO G2 / LPG2 between flanges. The disk is positioned in the inlet section of the holder, optionally with vacuum support. Final sealing is achieved by axial tightening of the flanges. Design Features The assembly includes:...
View
Pre-Torqued Lab-Holder SH Lab | Striko | Philippopoulos s.a.

Pre-Torqued Lab-Holder SH Lab | Striko

Pre-Torqued Lab-Holder SH Lab | Striko
Striko
Pre-torqued Laboratory Holder STRIKO SH Lab The SH Lab is a pre-loaded holder for STRIKO metallic rupture discs, designed for laboratory setups, test benches, pilot units, and small-scale high-pressure process lines. The disc is mounted inside the holder without torsional stress, ensuring that seating is independent of the final connection’s tightening...
View