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Sigma™ and Sigma EXL™ Disk Specifications Minimum/Maximum Pressure with Rating at 72° (22°C)
NOTE: Hastelloy® is a trademark of Haynes International Inc. Monel® and Inconel® are registered trademarks of Special Metals Corporation and its subsidiaries.
BS&B supplies many of the accessories required to safely and conveniently install our overpressure relief devices and complementary products. Through our professional team and global network of sales engineers and procurement personnel, we are able to provide the highest quality accessory products to meet your installation requirements.
After activation, the replacement disk is quickly slid into place. Saving hours of lost production due to blown rupture disks.
A gauge tap in the outlet flange of the safety head may be considered when the safety head is installed in a vertical position.
When activated, the jackscrews effectively separate the flanges, providing adequate clearance to remove or insert a safety head and external gaskets.
Eye bolts are recommended when weight and/or accessibility is a factor in lifting safety heads.
When a safety head is free-vented to atmosphere, a baffle plate may be considered to disperse overpressure and absorb recoil.
S90™, JRS™, FRS™, RLS™ and SKR™ reverse buckling disks. SRB-7RS™, S90-7R™ and SRB-7FS™ Safety Heads.
Rupture Disks (Bursting Discs) for the Highest Operating Pressure in Gas or Liquid Service.
Quick replacement of actives disk fast and with minimum process line exposure to personnel and the environment.
A range of sensors suitable for different rupture disk types used to provide immediate warning of a ruptured disk., #77-1003
Detec-Saf™ alarm system provides immediate warning and specific location of disk rupture and centralized monitoring of all disk locations.
Types Sigma EXL™, Sigma™, SKR™, and LPS™ Rupture Disks SRB-7RS™ and S90-7R™ Safety Heads
The Sigma EXL™ and Sigma™ Reverse Buckling Rupture Disk (Bursting Disc) has been developed to provide the highest operating pressure capability available from a Rupture Disk (Bursting Disc) pressure relief device. Sigma EXL™ and Sigma™ Rupture Disk (Bursting Disc) technology and the SRB-7RS™ Safety Head combine the accuracy and reliability of Reverse Buckling Disk technology with unique disk and safety head design features that enable the Sigma EXL™ and Sigma™ disk to operate to 95% of the Marked Burst Pressure (100% of Minimum Burst Pressure according to CEN ISO 4126-2 standards). The Sigma EXL™ and Sigma™ Rupture Disk (Bursting Disc) embraces SafT technology, Structural Apex Forming, the central feature on the disk dome enhancing burst pressure accuracy.
The Sigma EXL™ and Sigma™ rupture disks (bursting discs) are available in a range of corrosion resistant materials (see table). For each material the upper temperature limit has been determined from the recommendations of material manufacturers and user experience. While Hastelloy C-276 is the standard grade used, Hastelloy B and Hastelloy C-22 may be available upon request. All standard disks are available with 0%, 5%, and 10% manufacturing ranges.
The burst pressure of each lot of Sigma EXL™ or Sigma™ rupture disks (bursting discs) is tested at the users requested temperature. If the disk is requested above or below ambient temperature, burst testing for product certification will be carried out at this temperature to ensure the best product accuracy. For applications with operating temperatures that may exceed this tested burst temperature, please review with BS&B Safety Systems, Inc. or BS&B Safety Systems Ltd.
The Sigma EXL™ and Sigma™ rupture disks (bursting discs) are installed in an SRB-7RS™ Safety Head permitting the correct torque to be applied in the workshop before installation into the process. The asymmetric locating pins ensure centering and orientation of the disk within the Safety Head. The performance-proven metal-to-metal 'bite type' seal in the Safety Head (2"/50mm size and above) assures a leak tight assembly. When installed properly into the SRB-7RS™ Safety Head, the assembly can be removed, inspected, cleaned carefully then reinstalled without replacing the disk as the pretorque capscrews maintain the clamp load on the disk.
All of the BS&B global manufacturing locations are processing and shipping orders with our supply chain of parts, raw materials, and services continuing to meet and exceed expectations. We continue to implement policies at each location to meet evolving local requirements for the protection of our employees in their work on your safety product requirements which are critical to the support of local, national and global infrastructure. Our customers have made a partnership with BS&B which all of our employees take very seriously as we attend to continuity of supply alongside the essential focus on safety and reliability which is a hallmark of BS&B.
Our global infrastructure continues to be developed with MS Teams now augmenting our already robust global communication platforms which provide seamless customer attention whether we are working at a BS&B facility or working from home to meet local conditions. Adapting to ‘low contact’ customer support still includes customer site visit capability with appropriate advance clearance for all parties.
As a reminder of BS&B’s capabilities, we are renowned for rupture disk devices, industrial explosion protection equipment, and custom engineered rupture disk devices, and additionally have a comprehensive line of relief valve, flame arrester, and tank vent products for both established and new applications.
BS&B can always be contacted through our web sites which include www.bsbsystems.com and www.bsb.ie.
The BS&B global team appreciate the support of our customers and suppliers during this challenging time.