OsecoElfab

LoKr Technically Advanced Rupture Disc

Reverse-buckling design with a best-in-class Flow Resistance Factor (KR) for lower relief-line pressure drop, high reliability, and long service life.

Dimpled design gives full-bore opening and accurate burst ratings, especially at low flow rates.

Precision Reverse Operating Rupture Disc (PRO+KRGL)

High-cycle reverse buckling disc with a 95% operating ratio and best-in-class KR for gas and liquid. Suited to isolating safety relief valves.

High Pressure Rupture Disc Assembly (HPSR)

Welded high-pressure scored reverse buckling assembly for gas and liquid service. The weld removes leak paths and simplifies installation.

Tolerates full vacuum, elevated temperatures, and 95% operating ratio, including very high cycling.

Standard Forward Acting Rupture Disc (STD)

Forward acting disc for high-pressure, small-diameter venting to controlled areas or atmosphere. Size 1/2 in to 24 in (DN12 to DN600), gas and liquid, 70% operating ratio.

Precision Scored Reverse Rupture Disc (PSR)

Non-fragmenting reverse buckling disc that opens along scores, with a 90% operating ratio. Well suited to isolating safety relief valves.

Customized rupture discs for GIS/AIS switchgear

Pressure relief discs for high, medium, and low voltage switchgear, mounted directly into customer-specific flanges to contain pressurized dielectric gas in GIS equipment.

Direct mounting cuts installation time and removes the need for separate holders.

Flat Low-Pressure Composite Rupture Disc (FLCO)

Flat low-pressure disc that mounts between ANSI RF flanges without a holder. An optional burst sensor (FLCOS) is available. Size 2 in to 24 in (DN50 to DN600), gas and liquid, 50% operating ratio.

Oseco Safety Cartridge

One-piece, hermetically sealed unit combining the three components of a rupture disc system, arriving leak-tight from the factory and installing in minutes.

Removes the need to seal the disc within a holder, reducing maintenance.

Pure-Gard

Sanitary pressure relief disc for pharmaceutical, biopharmaceutical, and food applications where cleanability is critical. Crevice-free and dimple-free design, tested by dye penetrant and helium leak testing.

Opti-Gard

Single disc solution across a broad range of sizes, materials, burst pressures, and process conditions for liquid, gas, or vapour. Non-fragmenting, usable alone or with a safety valve.

Forward Acting Scored Rupture Disc (FAS)

High-performance forward acting disc with the lowest KR values for gas and liquid on the market.

Safe-Gard

Forward acting domed metal disc with precision cross-scoring on the vent side for liquid, gas, or vapour service.

Offers optional vacuum support and can serve as a metal alternative to composite domed discs at very high pressures.

Opti-Gard SoLo

Low-pressure reverse acting metal disc that operates accurately from as low as 2 psig, using a patented geometric shape and precision manufacturing.

OPR+/OPK+

High-performance reverse buckling disc offering a single-disc solution across a wide range of sizes and burst pressures, with potential stock reduction of up to 65%. Manufactured in Broken Arrow, Oklahoma.

Milli-Gard

Low-pressure reverse acting metal disc using the patented geometric shape and precision manufacturing that gives accuracy from as low as 2 psig.

PLR

High-performance reverse buckling disc for very low-pressure gas and liquid applications, with burst pressures down to 2 psig. Size 1 in to 12 in (DN25 to DN300), 90% operating ratio.

PRO-S

Reverse buckling sanitary disc using computerized load cell technology, with a smooth side facing process media to minimize product buildup. Suited to SIP/CIP. Size 1 in to 4 in (DN25 to DN100), 90% operating ratio.

Opti-Gard Ferrule

Sanitary disc for food and beverage, biotechnology, and biopharmaceutical use, with a smooth, uninterrupted surface that meets FDA approvals. Installs between ferrules and tri-clamps to preserve aseptic conditions.

Opti-Gard Ferrule SoLo

Sanitary low-burst-pressure disc with a smooth metal surface and FDA-certified seal, compatible with CIP and SIP. Installs between ferrules, tri-clamps, and NA-connect fittings.

Bio-Gard

Low-pressure, peripherally scored, reverse-acting disc for aseptic and hygienic plant, with a smooth surface to reduce microbial load and support SIP and CIP.

Compatible with standard sanitary fittings and withstands full vacuum without extra support.

Opti-Gard for API

Non-torque-sensitive reverse acting disc for active pharmaceutical ingredient plants, built to ASME BPE requirements. Smooth process-side surface, optional electropolishing and oxygen cleaning, non-fragmenting, and suitable for CIP and SIP.

Available with the non-invasive Flo-Tel burst sensor.

LoKr for API

Reverse buckling disc with best-in-class KR for bioprocess applications, covering most bioprocess pressures and offering long cycle life and tight tolerances.

Designed to keep relief-line pressure drop below 3%.

OPR+/OPK+ for API

Reverse buckling disc for API use, offering a single-disc solution across sizes and burst pressures. Compatible with the Flo-Tel magnetic burst detector. Manufactured in Broken Arrow, Oklahoma.

FAS for API

Forward acting disc for API and bioprocess plants with higher operating pressures. Cross-scored after forming, with a smooth non-scored process-side surface to limit product buildup and polymerization or crystallization.

Dual-Gard

Solution for pressure relief in energy storage technologies, combining a breathing membrane with a metal rupture disc or explosion vent in a single location for simpler battery and enclosure design.

Lithium-ion Battery Protection (PRO-LP)

Low-pressure disc for protecting lithium battery enclosures or other extremely low-pressure applications. Can mount directly on the enclosure, in a PRDI holder between ANSI flanges, or in a customer's integrated holder. Mounting hardware is not included.

Flat Composite Bursting Disc

Forward acting, non-fragmenting composite disc with tri-membrane construction for very low burst pressure applications, offering protection, reliability, and leak tightness.

Various slotting arrangements are available. Fitted with a Flo-Tel actuator as standard and installed in a forward-acting holder.

Precision Cut Reverse Rupture Disc (PCR) for switchgear

Reverse buckling disc for high-cycle or high-vacuum gas and vapour use, commonly in SF6 switchgear. Size 1 in to 12 in (DN25 to DN300), gas only, 90% operating ratio.

FAS for switchgear

Forward acting disc for GIS/AIS switchgear, valued for leak tightness, corrosion resistance, and longevity, with the lowest KR for gas applications on the market.

Standard switchgear ranges are listed in the product literature, and custom ranges are available on request.

Conventional Domed Disc (CDD)

Solid metal domed forward acting disc, stainless steel as standard with nickel, Inconel, and other materials on request. Sizes 3 mm to 800 mm (1/8 in to 32 in). Burst range 0.5 to 1,400 barg. Vacuum support is available, and none is needed above 30 barg.

Domed Composite Bursting Disc

Non-fragmenting domed composite disc with tri-membrane construction for low to medium pressures from 0.3 to 17 barg. Pre-formed to a set dome height for accurate burst pressure, with various slotting options.

Composite Disc (CO)

Forward acting composite disc with a broad pressure range, for uncommon sizes. Size 11/16 in to 42 in (DN18 to DN1050), gas and liquid, 80% operating ratio.

VAPRO / POSIPRO

Pair of bidirectional discs for positive and vacuum protection. POSIPRO handles extremely low positive relief with vacuum protection up to 100 psig. VAPRO handles extremely low vacuum relief with positive protection up to 100 psig.

Posi-Gard/Vac-Gard

Composite low-pressure reverse acting discs with integral burst detection and a 5-pin DIN connection. Posi-Gard withstands full vacuum, and Vac-Gard withstands up to 1 barg back pressure. Both open non-fragmenting and can be customized.

Top Hat Assembly

Disc welded to a top hat for a single-piece welded tee design that eliminates seat leakage, reduces flow resistance, and limits product buildup.

Uses standard piping and flanges in place of a diaphragm valve body, which makes it more affordable.

Intermodal Container Disc (ICD)

Solid metal, non-fragmenting forward acting disc for intermodal tanks and vessels carrying dangerous goods, designed with a tank safety specialist to meet international standards.

Score lines on the convex side limit buildup, and the process side can be fully lined against corrosive media.

Tank-Safe

Non-fragmenting disc for rail car use that withstands full vacuum. A holderless version is available for direct installation between industry-standard flanges, with a gasket depending on process temperature.

Two-Way Tank-Safe

Dual-pressure disc for both positive and negative pressure protection, with a slotted top, seal membrane, and vacuum support. Handles equal (2WS) or differing (2WD) pressures on each side.

Scored Railcar Disc (SRC)

All-metal railcar disc using scored technology instead of PTFE seals, avoiding PTFE-related leaks. Fits standard threaded or bolted railroad tank car safety vents.

Composite Railcar Disc (CRC)

Metal railcar disc with a 3.125 in outside diameter that fits standard threaded or bolted tank car vents. Stainless steel vacuum support protects the seal during unloading or transit. Same-day lead time and quantity discounts are available online.

Hydrochloric Acid Railcar Disc (HCL-RC)

Railcar disc for rubber-lined tank cars in hydrochloric acid service, suited to highly corrosive environments. 4.75 in O.D., Ryton body with fluoropolymer linings and gaskets on both sides.

HP-RC

Ryton plastic railcar disc with fluoropolymer linings on both sides, resistant to corrosion and to premature bursting from railcar coupling humping. Fits standard threaded or bolted tank car vents.

Soldered Disc Assemblies (SDA)

Soldered assemblies that protect machines and equipment from overpressure, removing traditional leak points. Available in many burst pressures, sizes, and materials to customer specifications.

Welded Disc Assembly (WDA)

One-piece welded assembly that can replace traditional union holders in separator and dehydrator applications. Easy to install, with no risk of damaging the disc during installation.

Capped Plug (OE2)

Capped disc and plug design using flat or domed conventional discs, usually with a brass plug and nickel disc. Used across industries from aerospace to fire protection, with leak tightness of about 10^-4 cc/sec and zero maintenance.

Screwed and Bonded Plug (O4A)

Brass body with a stainless steel or nickel disc, clamped between an inlet and outlet and sealed with a nitrile O-ring. Screwed and bonded together for robust performance in gas handling and cryogenic service.

Electron-Beam Welded Assembly (OE5)

Scored rupture disc electron-beam welded to the end of a plug, with a stainless steel plug and stainless steel or nickel disc. Offers superior leak tightness and integrity.

Electron-Beam Welded Assembly (OE6)

Scored forward or reverse disc electron-beam welded between the inlet and outlet of a plug. Withstands extreme temperatures and full vacuum. Optional baffle outlets provide controlled venting in harsh environments.

PRD/OTU

Fast-acting Pressure Relief Device for clean agent fire suppression tanks and bottles, opening within milliseconds. Suited to HFC, CO2, and inert gas suppressants.

Pressure Activation Devices (PAD)

High-integrity pressure activation devices for downhole oil and gas tool activation, offering superior leak tightness, industry-leading burst tolerances, and corrosion resistance.

Extruder Burst Plugs

Threaded plugs with a conventional disc soldered or welded to the end, for overpressure protection in plastic extrusion. The disc sits flush with the vessel wall to avoid product stagnation and leakage.

GraphiTech Monoblock

Graphite disc with no holder, mounted directly between ANSI flanges. Vacuum support is available as a bar or dial (GTMV). An inverted version (GTI) with a flat process side accepts a fluoropolymer liner for corrosive media.

Graphite G2 Bursting Disc

Tension-loaded, corrosion-resistant forward acting graphite disc for temperatures up to 180°C and aggressive chemicals where fragmentation is not a concern. No extra vacuum support is needed above 1.7 barg. Graphite or stainless steel holders are available.

Graphite Monobloc

Corrosion-resistant, low-pressure graphite bursting disc for chemical and pharmaceutical processes where fragmentation is not an issue. Can be customized from low-profile MRI discs to fully lined switchgear blocks.

Universal Arma-Gard

Holderless, non-torque-sensitive graphite disc for installation between PN, ANSI, and BS flanges, for low to very low pressures. A stainless steel armoured ring protects the disc from misaligned pipework and uneven bolt torque.

Two-Way Arma-Gard

Holderless graphite disc that protects vessels from both vacuum and overpressure. Non-torque-sensitive with a stainless steel armoured ring, for very low burst pressure applications.

Tool Activation Discs

1/2 in NPT burst plug for tool activation or as a drain plug, and a 1/4 in NPT plug for space-limited applications. Both can be set up to 30,000 psig with a tolerance of ±5%. Custom designs are available.

CRP

Lightweight explosion vent with a four-petal opening that gives maximum relief area and near-instant relief for deflagrations. Designed for power applications such as electrical cabinets and pulverizers.

EB Explosion Vents

Multi-layered stainless steel and fluoropolymer panels available in square, rectangular, round, or trapezoid shapes. Non-fragmenting, dust-tight, corrosion resistant, and with an 80% operating ratio, the highest of the explosion vent range.

Hygienic Vents

Crevice-free explosion vents for food, beverage, and pharmaceutical sites, which resist residue and bacteria buildup. Maintenance free and non-torque dependent.

MV Panel Range

Explosion vent family with a performance tolerance of ±0.25 psig. Built for longer service life with less maintenance, and meets OSHA Combustible Dust NEP and NFPA 68. A 10-day lead time is available for common sizes through a stocking program.

CRVC

Heavy-duty rectangular domed explosion vent with thicker materials that tolerate higher positive or negative operating pressures. Positive system pressure should be limited to 70% of set pressure. Suited to high-cycling dust collectors.

Thermal vent

Explosion vent for high-temperature grain and powder processes, combining a low-density silica thermal insulator with a stainless steel panel. Insulation stays integral, so condensation and product buildup do not reduce efficiency.

Lift-Gard

Explosion venting panel for vertical bucket elevators, with an integral outer frame that protects against vibration. Non-fragmenting with full opening, and the only flat vent combining an integral frame with an ATEX-approved burst detection system.

GLVF

Explosion vent for bucket elevators with a built-in outlet frame that removes the need for angle iron hold-downs. Meets NFPA 61.

MV-BE

Heavy-duty explosion vent for bucket elevators under high vibration, with a built-in outlet frame. Designed to NFPA 61 and NFPA 68.

API Rupture Disc Holders

Holders designed for correct API disc performance. The Reverse Disc Holder suits the Opti-Gard for API disc between flanges. The OPR/OPK holder fits multiple flange ratings and offers taps for an excess flow valve and Flo-Tel sensor.

Threaded Holder

Threaded holder for high-pressure use up to 15,000 psig, with 1/4 in or 1/2 in NPT inlets and a 1/2 in NPT or muffled outlet. Other connections are available.

Union Holder

Union holder for limited installation space. Disc replacement is faster because only the union nut is removed.

LKR Holder

Holder for the LoKr reverse buckling disc, creating a leak-tight unit with a tapered seal design that eases installation.

Insert Holder - FRDI / PRDI / RDI

Insert holders for most Broken Arrow discs, allowing the disc and holder to be pre-assembled and properly seated before installation. Available in PRDI, FRDI, and RDI seating arrangements.

Bolted Holder

Bolted holder with weld-neck or threaded inlet and outlet connections, designed for ANSI companion flanges and in place of ANSI B16.5 flanges. Carbon steel and 316 stainless steel as standard.

Booted Holder

Fluoropolymer-booted insert holder with a solid PFA insert for aggressive corrosives. Only fluoropolymer contacts the media when used with lined discs.

Forward Disc Holder

Holders for forward acting discs between flanges, designed for raised face flanges as standard, with RTJ or tongue-and-groove options and multi-flanged designs available.

Reverse Disc Holder

Holders for reverse acting discs between flanges, designed for raised face flanges as standard, with RTJ or tongue-and-groove options and multi-flanged designs available.

Pre-Torqued Insert Holder

FRDI(P) and PRDI(P) holders that can be removed for inspection and returned to service without disturbing the disc's torque values, saving maintenance time.

OPR/OPK Holder

Holder for multiple flange ratings, used with OPR+/OPK+ discs. Offers taps for an excess flow valve and the Flo-Tel+ rupture detection sensor.

Double Disc Assembly

Two discs in series (forward, reverse, or a mix). If the primary disc ruptures, the secondary prevents environmental release, and an intermediate pressure sensor signals that the primary needs replacing.

Useful for corrosive or harsh services, reducing leakage, valve damage, and downtime.

Oseco Safety Plug

Pressure management in upstream oil and gas well completions supports a safe work environment, shorter completion timelines, and protection of well casing integrity.

• Providing a safe work environment in well completions
• Reducing downtime and shortening upstream completion timelines
• Protecting the well casing integrity

Flo-Tel

Non-invasive reed switch and magnet sensor that fits into a holder. When the disc bursts, the magnet moves away and opens the circuit. Unaffected by downstream pressure or corrosion, with no leak paths, and only the disc needs replacing.

Flo-Tel XD

Burst detection system that sends a continuity break to a DCS. The first dual-certified Exd/EXia/b non-invasive system, suitable for Zones 0, 1, and 2, with a certified junction box.

Sanitary Burst Detection

Non-invasive magnetic burst detection for sanitary applications, offering fewer leak paths, reusability, and no rewiring after disc activation.

OSS Sensor

Membrane sensor for the PRO-S sanitary disc only. The alarm circuit opens when flowing media ruptures the disc, and the signal can drive computer-controlled alarms.

Vent-Tel (Sanitary)

Non-invasive, fail-safe reed switch and magnet detector mounted to the tri-clamp for biopharmaceutical discs. Can trigger a rapid process shutdown and is reusable.

Bio-Tel

Burst sensor designed for the Bio-Gard disc, with a 2-meter cable and IP67 connection. Simple apparatus per EN 50014 and EN 50020 with a suitable barrier, usable in Zone 1, with VITON seal material.

FLCOS Sensor

Combines overpressure protection with rupture detection in a uni-body disc and sensor, removing the need for a separate sensor.

OE-Tel

Fail-safe magnetic detector for threaded plug units. The magnet moves away from the reed switch when the disc bursts, breaking the electrical connection.

SVT-03 Sensor

Alarm sensor for detecting explosion vent opening, which can be fitted before shipment. Intrinsically safe with an I.S. barrier and a magnetic reed switch.

Vent-Tel (Panels)

Non-invasive, fail-safe reed switch and magnet detector for explosion panels, giving an instant signal of panel actuation.

ASF Sensor

Alarm sensor fitting that attaches to standard piping threads or extruder burst plugs, for product loss prevention in plastic and paper processes.

AMS Sensor

Burst disc sensor for corrosive and high-temperature environments, connectable to alarms or computer-controlled systems.

SVT Sensor

Sensor that can be installed on existing rupture disc assemblies. Flowing media opens its circuit and activates a connected alarm when the disc bursts.

Burst-Tel

Original burst detection system, using a polyamide membrane with a conductive path on the vent side. Flow breaks the path on rupture, giving an open circuit signal.

LPSF Sensor

Sensor for low-pressure VAPRO or POSIPRO discs, designed to open at pressure differentials of 30 inches water column or less, suited to storage vessels.