*mydirectindustry

SIGMA, SIGMA EXL

Product catalog summary

Introduction
The Sigma EXL reverse buckling rupture disk is designed for high operating pressure capabilities, combining reverse buckling technology with unique design features. It operates up to 95% of the marked burst pressure and 100% of the minimum burst pressure as per CEN ISO 4126-2 standards. The disk uses Saf™ technology to enhance burst pressure accuracy and opens without fragmentation.

Features

Available in sizes 1-8 inches (25-200mm).
High operating ratio: 95% of marked burst pressure, 100% of minimum burst pressure.
Standard 0% MDR, optional -5% MDR.
Non-fragmentation design suitable for gas, liquid, or two-phase flow.
Fail-safe with a damage safety ratio of less than 1.
Vacuum resistant and smooth process side to resist product accumulation.
Long service life under pressure cycling or pulsating conditions.
Compatible with BS&B type SRI-7RS, SRB-7RS, and SRB-7FS safety heads.

Burst Tolerance and Certification
The Sigma EXL and Sigma rupture disks exceed standard industry codes for certification, ensuring burst pressure accuracy through statistical control techniques and proof pressure testing. The disks are validated for liquid service using a hydraulic burst test system.

Damage Safety Ratio
If damaged, the Sigma EXL or Sigma rupture disk will relieve pressure at or below its marked burst pressure, ensuring a fail-safe operation.

Specifications
The disks are available in various materials, including Nickel alloy 200, 316ss, Inconel® alloy 600, Monel® alloy 400, and Hastelloy® alloy C-276, with specific pressure ratings at 72°F (22°C).

Operating Ratio
Sigma EXL disks can sustain operating pressures up to 95% of their marked burst pressure or 100% of their minimum burst pressure. Disks with a -5% MDR may have a lower operating pressure.

Contact Information
BS&B Safety Systems provides contact details for various global locations, including the USA, UK, Ireland, Mexico, India, Canada, Germany, Russia, Brazil, China, Singapore, the Netherlands, UAE, and Japan.

Note
All product specifications are subject to change without notice, and inquiries should be directed to BS&B Safety Systems for specific applications.

Catalog excerpts

SAFETY SYSTEMS SIGMA EXLM Reverse Buckling Rupture Disk Designed for the Highest Operating Pressure in Gas or Liquid Service

Open the catalog to page 1

SigmaTM, Sigma EXLTM Rupture Disks for the Highest Operating Pressure in Gas or Liquid Service The Sigma EXL reverse buckling rupture disk has been developed to provide the highest operating pressure capability available from a rupture disk pressure relief device. Sigma EXL technology coupled with either the SRI-7RS, SRB-7RS or SRB-7FS safety heads combine the accuracy and reliability of reverse buckling disk technology with unique disk and safety head design features that enable the Sigma EXL disk to operate to 95% of the marked burst pressure (100% of minimum burst pressure according to CEN...

Open the catalog to page 2

BURST TEST The certification procedure for Sigma EXL™ and Sigma™ rupture disks exceeds those required by standard industry codes and standards that require limited destructive testing to validate burst pressure and permit acceptance of the lot with any burst test distribution and uncentered test data. The Sigma EXL and Sigma disks' test data is graphically presented on their burst test certificate (see example). The curve includes 'in process' and final certification burst test data to build a clear picture of the burst pressure distribution. Only when the data is appropriately centered and distributed...

Open the catalog to page 3

SRB-7RS Safety Head Specifications Size Safety head flange rating Safety head flange thickness ASME / ANSI Flower petal Flower petal Flower petal Flower petal Note: Optional tell tale connection in safety head outlet will be required to meet ASME and PED code requirements when downstream devices are present. Limerick, Ireland T: +353 61 484700 F: +353 61 227987 E: [email protected] United Arab Emirates Consult T: +971 2406 9603 BS&B for F: +971 2406 9810 burst pressures available E: [email protected] for ECT, ECT-S, Visit our website for the most complete, up-to-date information V/ECT Yokohama,...

Open the catalog to page 4

SIGMA, SIGMA EXL

SIGMA, SIGMA EXL

Catalog excerpts

All BS&B SAFETY SYSTEMS, L.L.C. catalogs and technical brochures