Elfab Ltd.
Contact: Mike Purcell
PO Box 506
Burlington, KY 41005
U.S.
Phone: 859 653 9317
Fax: 859 372 6272
Elfab specializes in delivering extruder discs. We place a premium on being responsive, on both large and small disc orders.
Elfab is Europes leading manufacturer of bursting discs, bursting panels and associated detection devices. These intelligent pressure relief systems protect people, plant and equipment across the globe. Elfab also delivers unique design, testing and consultancy services for pressure management.
Elfabss customers are predominantly in chemical, pharmaceutical, oil & gas and food processing industries. Elfabs technology is also used in a wide range of OEM applications, from launch systems in space rockets, air bags in cars, to cryogenic systems in body scanners.
Elfab is a global organisation with world-wide approvals and accreditations, exporting 70% of production outside the UK. The company trades directly with customers across Western Europe and deals through an agent network in over 30 countries. Head office in North East England houses a multi-national customer support team, fluent in 10 languages.
Elfab Limited was originally named Torday and Carlisle after the two Hungarian owners and was founded in 1936 in the North East of England. As well as manufacturing nickel foil using electrical fabricating methods, the company also refurbished marine engineering equipment.
In the 1970s Torday and Carlisle bought the bursting disc division of F A Hughes Ltd. The company was renamed Elfab Hughes Elfab being an abbreviation of electrofabrication.
In 1994 the companys name changed to Elfab Ltd. At this time we also acquired the Robert Jenkins graphite disk business, which continued to trade under its original name until 2001 when it merged publicly with Elfab Ltd.
Elfab Ltd is one of the worlds leading manufacturers of Pressure Management Systems, with representation in over 40 countries. We employ approximately 100 people, with sales staff working throughout Europe and a world wide network of agents and distributors.
Back Pressure
The static pressure existing at the outlet of a bursting disc device at the time the device bursts or vents. Where pressure is below atmospheric pressure, this can be termed Vacuum Pressure.
Back Pressure Support
Component of a bursting disc device which prevents failure of the bursting disc due to pressure differential in a reverse direction. Where system pressure is below atmospheric pressure, this can be known as a Vacuum Support.
Batch
A quantity of bursting discs made as a single group to the same Specifications and from the same lot of material.
Bursting Disc
A non-reclosing element designed to burst or rupture at a predetermined pressure to protect systems or individual plant from unacceptable levels of pressure or vacuum. The pressure containing and pressure sensitive component of a bursting disc device.
Bursting Disc Assembly
The complete assembly of components which are installed into the holder to perform the desired function.
Bursting Disc Device
A non-reclosing pressure relief device actuated by differential pressure and designed to function by the bursting or venting of the bursting disc(s). It is the complete assembly of installed components, including where appropriate the bursting disc holder.
Bursting Disc Holder
The part of a bursting disc device which ensures the proper performance of the bursting disc and accommodates its installation into a system.
Bursting Pressure
The value of the pressure differential across the bursting disc at which a bursting disc functions.
Coating
A layer of metallic or non-metallic material applied to components of a bursting disc device (not a liner)
Coincident Temperature (Burst Temperature)
The temperature used in conjunction with a bursting pressure.
Conventional (Forward Acting) Bursting Disc
A bursting disc designed to fail when a build up of pressure in the system exceeds the tensile strength of the disc material (tension loaded). A conventional bursting disc may be flat or domed. A conventional domed bursting disc is domed in the direction of the bursting pressure (ie where the bursting pressure is applied to the concave side of the bursting disc).
Discharge Capacity
The rate at which a bursting disc device discharges a fluid after bursting or venting of the bursting disc assembly.
Foil
The sheet or strip used for the manufacture of metallic bursting discs.
Free-Flow (Discharge) Area
The area which is the minimum cross-sectional flow area of the bursting disc device taking into consideration the possible reduction of area by back pressure supports, catching devices and parts of the bursting disc which remain after bursting or venting.
Liner
An additional sheet or sheets of material forming part of the bursting disc assembly or holder (not a coating)
Manufacturing Range
Range of pressure within which the average bursting pressure of a batch of bursting discs shall fall in order to be acceptable for a particular application as agreed between manufacturer and customer.
Maximum Operating Pressure
This is the maximum system pressure to which the disc may be exposed without causing premature metal fatigue to the rupture disc. Maximum operating pressures are typically between 50% and 100% of the rated burst pressure of the disc, depending on the type of disc. This is also known as Maximum Operating Pressure to Burst Pressure Ratio.
Operating Pressure (Working Pressure)
The pressure which the bursting disc is exposed to during normal operation
Operating Temperature (Working Temperature)
The nominal temperature which the bursting disc is exposed to during normal operation
Performance Tolerance
The difference between the maximum and minimum specified bursting pressures at a coincident temperature. Burst tolerance" is the allowable deviation in actual burst pressure from the "marked burst pressure". Typically expressed as a percentage (or in "psig"), a disc properly specified and installed should always burst within the "tolerance" for the particular type, style, and rated pressure of the disc
Relieving Pressure
The maximum pressure under discharge conditions in the pressurised system (can differ from burst pressure).
Relieving Temperature
The maximum temperature under discharge conditions in the pressurised system (can differ from burst temperature).
Reverse Acting (Buckling) Bursting Disc
A bursting disc which is domed against the direction of the bursting pressure ie where the bursting pressure is applied to the convex side of the bursting disc and designed to fail under compression by buckling, bending or shearing forces.
Slotted Lined (Composite) Bursting Disc
A conventional bursting disc made up of two or more layers, one of which is slit or slotted so as to reduce its strength and to control the bursting pressure of the bursting disc. May be flat or domed.
Specified Burst Pressure
The pressure quoted by the user or the manufacturer with a coincident temperature when specifying the burst disc performance or requirement. May be specified as a minimum or maximum value.
