Selection of 45 products among
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MRB HIGH PRESSURE - RUPTURE DISK (BURSTING DISC)
MRB High Pressure
Rupture Disk (Bursting Disc)
Highlights
For high pressure applications. MRB (The Machined Reverse Buckling Rupture Disk (Bursting Disc)) offers a one-piece design including both
disk and housing. It is a uniform metal slug machined to a thin diaphragm in the center and then formed. When the reversal pressure is reached the disk snaps through and shears out completely at the disk/housing junction
Features
Sizes 3/8" to 4"
Pressure Ratings available up to 70,000 psig
Opens full bore with no flow restrictions
Design assures long service life with a very high resistance to fatigue
Non-torque sensitive
Maximum Operating Pressure to 90% of disk pressure rating
No knife blades required for opening
Use in gas or liquid service
Designed to adapt to customer's unique application
Sample MRB Installations
Selection Data
Specifications for Standard MRB Rupture Disks
Min/Max Pressure Ratings at 72° F. (psid)
Consult factory for availability of other materials or pressure ratings.
Engineering Information
Minimum and maximum pressure ratings are applicable at 72° F.
Manufacturing Range:
Available with either 2%, 5% or 10% manufacturing range. The total range is placed on the minus side of the requested rating.
Example:
If a 20,000 psig MRB is ordered with a 10% manufacturing range, it may be tagged at any pressure between 20,000 psig and 18,000 psig.
Burst Tolerances: ± 5%
Tolerances are the maximum variation from the above tagged burst pressure.
Recommended maximum temperatures for each metal are:
Hastelloy C-276 900° F.
Inc/Alloy 600 900° F.
304L SS 900° F.
*Consult factory for availability of other materials or pressure ratings.
STANDARD DESIGN
NOTE: Products, specifications, and all data in this literature are subject to change without notice. Questions regarding product selection and specifications for specific applications should be directed to BS&B, Attn: Customer Service Dept.
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B S & B Safety Systems (UK) Ltd
SOLID METAL RUPTURE DISK (BURSTING DISC) TYPE B
Solid Metal Rupture Disk (Bursting Disc)
Select from the following topics:
Benefits
How a Tension-Loaded Disk Works
Standard Manufacturing Ranges
Rupture Tolerance
Specifications
Holder
Requirement
Linings
Type BV Disks for Vacuum
Type BR Disks for Low Burst Pressures
Use in Elevated or Cold Temperature Service
Safety Heads for Type B Disks
Benefits
The vents may be supplied with the following:
Electrical sensor to warn of open vent
Locking enclosure
Sealed enclosure for corrosive environments
Activated reclosing
How a Tension Loaded Disk Works
As the pressure increases on the tension-loaded disk, the seating design allows the dome to thin out until it can no longer withstand the pressure. The disk ruptures. Metal segments fold back against the walls of the fitting in an irregular pattern to provide a full opening. The ultimate tensile strength of the metal determines its failure point when loaded in tension.
Standard Manufacturing Ranges
When you order a rupture disk (bursting disc), a manufacturing range is automatically assigned to the burst pressure you specify. The following table gives the standard manufacturing ranges. A manufacturing range eliminates the necessity for the manufacturer to stock all possible thicknesses of all materials, nearly 100,000 thicknesses in all, to make all burst pressures.
For example, if you order a B Disk to burst at 80 psig, BS&B will enter the order to the shop with the standard manufacturing range (+9,-5), or 75 to 89 psig. BS&B will try for your requested pressure of 80 psig, but will ship the lot of disks if the marked pressure falls between 75 to 89 psig. Once the disk is rated and marked 78 psig, the burst tolerance of ±5% now applies to this stamped pressure.
The standard manufacturing ranges shown in the following table can be reduced by 1/2 or 1/4 for an additional cost. Hastelloy C-276 / Alloy C-276 is available only with standard manufacturing range and 1/2 range.
Standard Manufacturing Ranges for Solid Metal Disks Before the Disk is Stamped
Rupture Tolerances
Burst tolerances are the maximum expected variation from the disk's marked burst pressure.
Normal Rupture Tolerances for Type B series Solid Metal Disks:
Marked Rupture Pressure (psig) Expected Rupture Tolerance
From >2 to
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B S & B Safety Systems (UK) Ltd
REVERSE BUCKLING DISKS - SKR-U REVERSE BUCKLING DISK
SKR-U Reverse Buckling Disk
Introduction
The SKR-U™ rupture disk (bursting disc) is partnered with the UR-2 safety head to provide high integrity reverse buckling rupture disk (bursting disc)
technology in a threaded union type holder. The SKR-U™ rupture disk (bursting disc) uses Saf™ technology (structural apex forming) to accurately control its burst pressure making it insensitive to the assembly torque variations that will occur in a threaded type holder.
The UR-2 safety head is available in three standard nominal sizes: 1/2 " / 15mm,3/4_" / 20mm, and 1" / 25mm. Standard inlet & outlet female threads are 1/2 ", 3/4 ", and 1" NPT. Custom thread configurations are available. The SKR-U™ rupture disks (bursting discs) are identified SKR-U™1/2" / 15mm, SKR-U™3/4" / 20mm, SKR-U™ 1" / 25mm and are all supplied with permanently attached 3-D metal identification tags.
Note: The SKR-U™ is a 2-part rupture disk (bursting disc) comprising a calibrated metal dome that faces into and responds to a source of overpressure, and a stainless steel hinge ring permanently fitted to the downstream side of the disk that works together with the safety head to retain the disk petal after opening.
These pressures are applicable to all sizes of SKR-U™ rupture disk (bursting disc).
Standard safety head materials are carbon steel & stainless steel.
Temperature
The design temperature for the UR-2 Union safety head is 700 deg F / 371 deg C. All of the standard holder and rupture disk (bursting disc) materials are available up to this limit except for Titanium & Tantalum. Titanium is limited to 572 deg F / 300 deg C, and Tantalum is limited to 500 deg F / 260 deg C.
Thread Connection Options
While the standard thread connections are _", _" and 1" NPT female inlet & outlet, the following alternatives are available within the same overall dimensions.
Burst Pressure Tolerances
BS&B applies both a burst tolerance and a manufacturing design range to the SKR-U™ rupture disk (bursting disc). Whether North American ASME, European Pressure Equipment Directive or ISO standards are followed, the approach is the same.
Burst tolerance is the +/- range of pressure over which a rupture disk (bursting disc) can be expected to burst. Manufacturing design range is a range of pressure, always applied to the minus side of the user requested burst pressure for the SKR-U™, that simplifies disk fabrication testing and provides economic benefit to the user where such an added tolerance can be accommodated by the application.
Burst tolerance is either +/-5% of burst pressure or +/-2psi / +/-0.138 bar for disks rated below 40 psi/2.76 bar.
MDR and burst tolerance are additive. In the European PED & ISO cases, the burst tolerance and MDR are combined. In the ASME case, the ‘marked burst pressure’ must be a value within the agreed manufacturing design range & then the burst tolerance is applied.
Safety Head Design – Rupture Disk (Bursting Disc) Installation
The UR-2 safety head contains 4 metal components: inlet, holdown ring, outlet, and hexagon assembly nut. The SKR-U™ rupture disk (bursting disc) is pre-assembled to the safety head between the inlet and the holdown ring using two capscrews. This locates and centers the disk, ensuring the correct direction of installation: these two capscrews and a single locating pin in the UR-2 inlet have an asymmetric layout that matches three holes in the SKR-U™ disk flange.
This pre-assembly feature ensures that the disk can be easily installed even where the piping flow path may not be ‘vertical up’. The inlet/disk/holdown subassembly is fixed to the UR-2 threaded outlet by a hexagon nut. It is the hexagon nut that provides the sealing load to the safety head assembly (the capscrews are for preassembly only).
As an option, the UR-2 safety head can be provided with a threaded connection on the outlet side to enable the connection of a ‘tell-tale’ assembly.
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B S & B Safety Systems (UK) Ltd
REVERSE BUCKLING DISKS - LPS REVERSE BUCKLING DISK
LPS Reverse Buckling Disk
U.S. patents 5,996,605 and 6,178,983 apply. Other patents pending.
The Low Pressure LPS™ Reverse Buckling Disk and SRB-7RS Safety Head
LPS Rupture Disk (Bursting Disc)
Features:
Solid Metal Design
Low burst pressure from 5 psig (0.35 barg)
Designed for gas, liquid or two phase service
Fail Safe: Damage Safety Ratio =1
Designed for non-fragmentation
Vacuum/back pressure resistant
High Operating Ratio: 90% of Minimum Burst Pressure
Reverse Buckling Disk in sizes: 1"-8" (25 mm-200 mm)
For installation in BS&B type SRB-7RS pre-torqued safety head
The LPS Rupture Disk (Bursting Disc) was developed to provide low burst pressures from 5 psig (0.35 barg) using reverse buckling rupture disk technology. The LPS Rupture Disk (Bursting Disc), 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 (Bursting Disc) Material Options
The LPS Rupture Disk (Bursting Disc) 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 316, Inconel® (Nickel alloy 600), Monel® (Nickel alloy 400), Hastelloy® C-276, & Tantalum.
The LPS disk includes an outlet side hinge to control fragmentation. Standard disk hinge material is Stainless Steel grade 316 with alternates available upon request. Tef liners are offered with the type LPS Rupture Disk (Bursting Disc) at burst pressures of 35 psig (2.4 barg) and higher.
Flow Performance/KR Values/Rupture Disk (Bursting Disc) Sizing
Flow resistance factor, KR, may be used to determine the relieving capacity of a
system when using techniques such as those described in Crane Technical Paper No. 410. Individual KR values have been established for both gas & liquid service for the LPS disk. These are experimentally determined at the BS&B Safety Systems, L.L.C. flow laboratory following ASME procedures and witnessed by ASME representatives. Care must be taken to use the correct value for sizing purposes. When KR values are marked on the LPS disk tag, those for gas service are shown as KRg, and those for liquid service are shown as KRl.
When using KR value for sizing calculations, the nominal pipe size (assuming schedule 40 pipe), of the vent system is used. When using coefficient of discharge sizing techniques, the Minimum Net Flow Area or Net Relief Area of the rupture disk (bursting disc) device is used.
MNFA is expressed in square inches to facilitate sizing calculations in line with ASME practices. NRA is expressed in square centimeters for use when sizing in line with ISO, European Standards and forthcoming CEN practices.
Operating Pressure Ratio (Maximum Operating Pressure)
LPS Reverse Buckling Disks can be operated to 90% of their minimum burst pressure. In other words, to 90% of the marked burst pressure less the burst tolerance.
Vacuum Resistance/Back Pressure Resistance
The LPS disk will resist vacuum without the need for an additional vacuum support. Back pressure resistance is limited to 15 psig (1.03 barg) for disks rated to burst at 15 psig (1.03 barg) or less. For higher burst pressures, back pressure resistance is equal to the minimum burst pressure of the ordered LPS disk.
Maximum Recommended Temperature
Hastelloy is a trademark of Haynes International Inc., Monel and Inconel are trademarks of Inco Alloys International. Teflon® is a trademark of E.I. DuPont de Nemours & Co., Inc. BS&B may use equivalent materials from other sources.
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B S & B Safety Systems (UK) Ltd
CUT-OFF SAW DIADISC 41OO / 42OO
DIADISC 41OO / 42OO
Cut-off saw for demanding laboratory work
Application:
Cut-off saw for lab cutting of plastics, non-ferrous metals, steel, glass, ceramic, etc., along with PBC's made from
laminated paper and fibreglass (FR4).
Area of application:
Lab, workshop, production. Should only be used in a dry environment.
Tools:
HSS and solid hard metal saw blades, diamond cutting disks, corundum cutting disks and special tools.
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MUTRONIC
NU-SAF RUPTURE DISKS
NU-SAF Rupture Disks
Reliable overpressure relief is assured with components which cover a wide range of applications and service pressures.
Features
Benefits
XN-Precision Scored Rupture Disk
(Bursting Disc)
LCN Low Pressure Rupture Disk (Bursting Disc)
NX-7R Safety Head
Ordering Information
Features
Sizes 1" to 8" (25 mm - 200 mm).
Pressures 19 - 1450 psig (1.3 - 100 bar).
80% operating ratio.
± 5% Burst Tolerance.
Flat Seal.
Metal-to-Metal bite type seal.
Tension loaded.
Benefits
Minimal fragmentation.
Liquid and Gas service.
Extended life.
Reliable.
Easy Installation.
Leak-tight.
Fail-safe.
No vacuum support needed.
The Nu-SafT System introduces a new concept that combines the benefits of advanced technology with the simplicity of a basic style. Reliable overpressure relief is assured with components which cover a wide range of applications and service pressures.
Overpressure relief from 19 psig (1.3 bar) to 1450 psig (100 bar) is assured in a range of sizes from 1 inch (25 mm) to 8 inch (200 mm).
The Nu-SafT System consists of an inlet and an outlet of the NX-7R Safety Head plus the XN or LCN Rupture Disk, depending on the pressure required. Refer to Figure 1.
The XN Rupture Disk (Bursting Disc) incorporates precision scoring technology in a metal, tension loaded design. The precision scoring design minimizes the possibility of disk fragmentation. Operating pressure may be extended to 80% of the disk's burst rating without the risk of metal fatigue and subsequent reduction in normal service life. The new design exhibits no premature failure or fatigue cracks after extended pressure cycle testing from vacuum to 80% of the disk's burst rating. The XN Rupture Disk (Bursting Disc) design can withstand full vacuum without the need for a vacuum support.
For the lower pressure ranges the LCN Rupture disk is available. This is a composite disk comprised of three parts: (1) A slotted metal top section is the pressure controlling element. (2) A Teflon®* seal isolates the top section from the process. (3) The slotted metal bottom section will withstand vacuum. The flat design minimizes the possibility of disk damage during installation.
The simplicity of the NX-7R Safety Head design incorporates several features which allow easy installation. The Quick-Sert Safety Head with its reduced diameter fits inside the studs of two companion flanges. Asymmetric alignment pins in the Safety Head mate with location holes in the rupture disk (bursting disc), thus eliminating incorrect installation and slippage. The flat set design in combination with a metal-to-metal "bite-type" seal provides a leak-tight system. The NX-7R Safety Head and rupture disk (bursting disc) are easily pre-assembled with side lugs.
*Teflon is a registered trademark of Dupont.
XN Precision Scored Rupture Disk (Bursting Disc)
Solid Metal
Precision Scored
Minimal fragmentation
Can withstand vacuum without support
Operates up to 80% of the disk's rated pressure. (Consult factory for tighter operating ratio and manufacturing ranges.)
Liquid and gas service (acceptable for liquid service with compressible gas pocket between liquid and disk.)
Disks damaged or installed incorrectly will burst at rated pressure or lower.
Can be used in pressure cycling conditions.
Manufacturing Range
A 5% manufacturing range is standard. Consult the factory for tighter operating ratio and manufacturing range.
The total range is placed on the minus side of the requested nominal rating.
Example:
If an XN Rupute Disk is ordered for a 725 psig (50 bar) burst pressure and a 5% manufacturing range, it may be tagged at a pressure between 689 psig (47.5 bar) and 725 psig (50 bar).
Tolerances:
Burst tolerances are the maximum variation from the above tagged burst pressure.
Example:
Disks tagged above 40 psig (2.75 bar) ± 5%
Disks tagged 40 psig (2.75 bar) and below ± 2 psig (1.38 bar).
**Consult factory for tighter operating ratio and manufacuring range
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B S & B Safety Systems (UK) Ltd
CLASSIC FLAP DISCS
Customer groups
Repair and maintenance workshops, Locksmith's trade, Foundry industry, Shipyard, Automotive and component industry, Boiler and facility industry
Fields of application
Surface
preparing and finishing, Rust removal, Deburring, Cleaning, Cleaning of welding seams, Bevel grinding
Universal use (surface grinding and edge grinding)
Reduced decibel level -10dB(A)
Good stock removal rate because of zirconium corundum
High surface quality
No clogging or glazing of the tool
Suitable for different materials: steel, stainless steel, INOX, cast irons and non-ferrous metals, free of Fe, S and CI (< 0.1%)
No high working pressure necesary
Vs = 80 m/s
27CLA conical shape with fiberglass backing pad, fiberglass pad wears down (causes no scratches on the workpiece) = high exploitation of the flaps, high lifetime, low weight, noise reduction
28CLA straight shape with fiberglass backing pad = high exploitation of the flaps (causes no scratches on the workpiece), high lifetime, low weight, noise reduction, mainly used for surface grinding
All types are free of Fe, S, CI (< 0.1%)
ZA = zirconium corundum
Packing Unit: 10 pcs.
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TYROLIT - Metal Fabrication Groupe - Swarowski
CUT-OFF SAW DIADISC 47OO
Precision cut-off saw with automatic saw blade feed,
specially for plate cutting of plastics and non-ferrous metals, (Alu,Ms)
along with PBC's made from laminated paper and fibreglass.
Processing
occurs automatically.
Set dimension - insert plate - press start button.
A precision result, cut after cut
Special characteristics:
Saw blade is shielded on all sides for safe working
Manual and automatic operation
Large working surface (up to max. 800 mm cut length)
Adjustable feed velocity and feed cutoff
Automatic recognition of length of cut and return traversing of saw blade after cutting process
Application:
Saw machine for exact, rational and safe cutting of plates made of aluminium, plastic, multi-layered plastic, Resopal, Plexiglas® and Makrolon. fibreglass PBC's (FR4), laminated paper (FR2), PTFE etc.
Area of application:
Lab, workshop, production. Should only be used in a dry environment.
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MUTRONIC
