BS&B LSR Instruction Manual

Type: LSR™ RUPTURE DISK and SRB-7RS™ and SRI-7RS™ SAFETY HEADS
Warning: Rupture disks are intended to provide a pressure relief opening. This rupture disk is designed to burst at a specified
temperature and pressure, thereby relieving excess pressure or preventing excessive vacuum in a system. It is imperative that this
rupture disk be properly installed and safely vented in order to avoid bodily injury, damage to property, pollution and loss
of product. BS&B Safety Systems L.L.C. and BS&B Safety Systems Limited supply disks selected by their customers that are
manufactured in reliance upon information and specifications supplied by the customer. BS&B Safety Systems L.L.C. and BS&B
Safety Systems Limited are not liable for any damage resulting from improper installation, improper system design, unsafe venting,
or other factors beyond BS&B Safety Systems L.L.C. and BS&B Safety Systems Limited control. Do not locate the rupture disk where
personnel, equipment or property will be exposed to temperature and pressure through the activated disk.
ORDER REPLACEMENT DISKS BY LOT NUMBER
(shown on disk tag). EXPLOSION VENTS
BEFORE YOU INSTALL A RUPTURE DISK
Inspect Safety Head
1. Inspect Safety Head mating surfaces for foreign
material. Pits, dirt, or grit can damage the rupture disk
affecting disk performance or cause leakage. Clean if
necessary. The safety head size and pressure rating
must match the companion pipe flange size and
rating. Ensure that appropriate adjustments are made
for temperature when reviewing flange rating
compatibility.
2. The Rupture Disk and Safety Head must not be
machined or modified in any way except with the
approval of BS&B Safety Systems L.L.C. or BS&B
Safety Systems Ltd. Failure to obtain such approval
voids the warranty on this product.
Inspect Pipe Flanges
1. Ensure the pipe flanges are parallel to a sufficient
standard that will permit proper function of both the
rupture disk device and the chosen pipe flange
gaskets.
Inspect the Rupture Disk
1. Handle the rupture disk carefully holding the disk by
the perimeter or tag only. Examine seating and
domed surfaces for nicks, dents, scratches, and
foreign material which can damage the disk or cause
leakage or affect the burst pressure. Do not install a
damaged disk. Installation of a damaged disk may
result in premature activation of the disk. The LSR
series uses SAF
TM
Forming) and the designed precision indentation in
the centre of the dome is present in all cases to assist
operating accuracy.
Safety Precautions
CAUTION: When installing a disk upstream of a
pressure relief or safety valve, ensure that the opening
of the disk does not interfere or affect the performance
of the valve. Provide adequate support for piping and
connections to absorb recoil/reaction forces when the
disk activates. The Rupture Disk and Safety Head should
not be subjected to bending stresses. Do not locate the
disk where it may be subjected to thermal shock.
Moisture, rain, condensation, or snow may cause a
©2023 BS&B Innovations, Ltd.
INSTRUCTION MANUAL
technology (Structural Apex
thermal shock to the disk causing the disk to activate
below its marked Burst Pressure. When the disk
activates, the resulting shock wave may affect the
operating performance of downstream equipment.
Handle carefully, individual disk components have sharp
edges.
Note: Corrosion and process conditions may affect
disk deterioration and necessitate more frequent
replacement. The installation of the rupture disk
must be conducted by trained and competent
personnel.
Disk and Safety Head Types
Disk Type
LSR
TM
Assemble Rupture Disk in SRB-7RS™ or SRI-7RS™
Safety Head.
1. Place the inlet of the Safety Head on a flat work
surface in position as shown in (Figure 1) with flow
arrows and locating pins up.
TM
2. Place NEW, UNDAMAGED rupture disk on inlet so
locating pins mate with the corresponding holes in
the rupture disk. (Figure 2).
Issued Nov 14 th , 2023
II-TX-7001-EN
Safety Head
SRB-7RS or SRI-7RS
TM TM
Figure 1
Figure 2
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