The Low Pressure LPS™ Reverse Buckling Disk and SRB-7RS Safety Head

Product catalog summary

Overview: The document provides detailed information about the LPSTM Rupture Disk, a low-pressure reverse buckling disk, and the SRB-7RS Safety Head. It highlights the disk's design, material options, features, and performance specifications.

Specifications: The LPS Rupture Disk is designed for low burst pressures starting from 5 psig (0.35 barg) using reverse buckling technology. It is available in various corrosion-resistant materials such as Nickel alloy 200, Stainless Steel 316, Inconel, Monel, Hastelloy C-276, and Tantalum. The disk includes a hinge to control fragmentation and is compatible with Teflon liners for burst pressures of 35 psig (2.4 barg) and higher.

Features: Key features include a solid metal design, low burst pressure capability, suitability for gas, liquid, or two-phase service, fail-safe operation with a Damage Safety Ratio ≤1, non-fragmentation design, vacuum and back pressure resistance, and a high operating ratio of 90% of the minimum burst pressure. The disk is available in sizes ranging from 1” to 8”.

Flow Performance and Sizing: The flow resistance factor, KR, is used to determine the system's relieving capacity. KR values are specific for gas (KRg) and liquid (KRl) services and are determined experimentally. The disk can operate up to 90% of its minimum burst pressure and resists vacuum without additional support. Back pressure resistance is limited to 15 psig for disks rated at 15 psig or less.

Burst Pressure Tolerance: The burst tolerance varies based on international codes, with options for manufacturing design range and performance tolerance. The document provides examples of calculating minimum and maximum burst pressures based on specified tolerances.

Cycle Resistance and Service Life: The cycle resistance depends on operating conditions. Static pressure maximizes service life, while highly cyclic conditions reduce it. Temperature influences burst pressure, and users are advised to consult BS&B for guidance on rated burst temperatures.

Installation and Compatibility: The LPS disk is installed in the SRB-7RS Safety Head, allowing pre-torqued assembly for easy installation and maintenance. The safety head is compatible with other rupture disks in the STA-SAF System, facilitating upgrades to LPS technology.

Sanitary/Aseptic Option: The LPS-S disk is available for use in sanitary/aseptic systems with specific safety head and tri-clamp connection sizes.

Contact Information: The document provides contact details for BS&B Safety Systems in the USA, Ireland, and the UK for further inquiries and product support.

Related Products: Additional products include Burst Alert Sensors and the SmartDisk wireless monitoring system, with references to relevant catalogs for more information.

Catalog excerpts

The Low Pressure LPS™ Reverse Buckling Disk and SRB-7RS Safety Head-1

TM Catalog 77-4002 The Low Pressure LPS™ Reverse Buckling Disk and SRB-7RS Safety Head Visit www.bsbsystems.com or www.bsb.ie for the most complete, up-to-date information. BS&B SAFETY SYSTEMS, L.L.C. BS&B SAFETY SYSTEMS LTD. LPSTM Rupture Disk U.S. patents 5,996,605 and 6,178,983 apply. Other patents pending.

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The Low Pressure LPS™ Reverse Buckling Disk and SRB-7RS Safety Head-2

The LPS Rupture Disk was developed to provide low burst pressures from 5 psig (0.35 barg) using reverse buckling rupture disk technology. The LPS Rupture Disk, combined with the SRB-7RS® Safety Head, provides accuracy and reliability. The LPS uses SAF™ technology (Structural Apex Forming™) enabling very low burst pressures to be achieved with excellent opening characteristics. LPS Rupture Disk Material Options The LPS Rupture Disk is available in a range of corrosion resistant materials (see table on opposite page for details). Standard disk materials are Nickel alloy 200, Stainless Steel grade...

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The Low Pressure LPS™ Reverse Buckling Disk and SRB-7RS Safety Head-3

Burst Pressure Tolerance Options The approach to LPS disk burst tolerance depends upon which International Code is being followed. For disks to comply with the ASME Code, please select a “manufacturing design range” and the “burst tolerance” applicable to the required burst pressure. For disks to comply with European or ISO standards, please select either a Performance Tolerance or a min/max burst pressure. Alternate larger tolerances are indicated where a cost savings can be offered. Burst Tolerance Burst tolerance is the +/- range of pressure over which a rupture disk can be expected to burst....

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The Low Pressure LPS™ Reverse Buckling Disk and SRB-7RS Safety Head-4

SRB-7RS Safety Head Dimensions Installation in SRB-7RS™ Safety Head The LPS disk installed in an SRB-7RSTM Safety Head permits 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 performanceproven metal-to-metal “bite-type” seal in the safety head (2”/50 mm 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...

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