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General description:
Uniquely designed for exceptional durability and thermal resistance. Made entirely of high quality 310 stainless steel and featuring Floating PlateTM technology, these long lasting barriers resist oxidation and distortion better than ever before.
The 4900 series of barriers are ideal for applications such as annealing, aluminum or stainless steel brazing, frit sealing and annealing, and steel heat treatment processes.
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Tungsten heavy alloy is completely lead-free, being comprised of tungsten with
minor amounts of nickel and iron. It offers a number of advantages as a radiation
shielding material for clinical use:
- Good corrosion resistance under ambient conditions
- Low toxicity
- Superior radiation attenuation compared to lead
- Damage resistant due to much higher mechanical properties than lead
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This type of protection prevents risks to the eye and the face against impact from particles or projections of liquid.
It offers unique protection against electric short-circuit arc.
We create face shields that are technically "perfects" and accentuate our research on comfort, lightness and aesthetics.
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The Protector range of face protection products is the most comprehensive in the market, and offers the user a choice of different styles and materials to suit almost every application. Our face protection range features comfortable integrated products, which offer the user excellent protection from impact, liquid splash, heat, molten metal splash, and electrical contact. The main element of the protector range has one design of visor attachment, to allow the user to select different types of carrier system and to have one style of visor for every application on site.
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SentinelTM Series Headgear
For the ultimate value in lightweight, comfortable face protection, the Bullard Sentinel Series headgear can't be beat. All Sentinel Series headgear include two sizing features for enhanced comfort. The Sure-Lock® ratchet adjusts the headband to sizes 6 1/2" to 8" and it will not slip from the selected size. The crown strap conforms to the shape of the head. The brow pad, made of SportekTM and offered exclusively by Bullard, pulls moisture away from the skin, creating a drier, more comfortable fit. Brow pads are hand washable and replaceable. Sentinel easily accommodates both primary eye protection and half-facepiece style respirators.
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MCR Safety headgear has locking cams which eliminate snaps and lower replacement costs. Face shield windows are sold separately. Please consult your Crews Distributor for more information about other MCR Safety eyewear accessories, including:
- Sideshields
- Replacement straps
- Replacement lenses
- Screwdriver repair kits
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Supervizor
A robust, heavy-duty, helmet mounted faceshield range with hearing protection compatibility
Compatible with wide range of helmet designs (size, shape and geometry)
Visor fixing method is secure and allows easy visor replacement
Full-face protection: optional chinguard versions available for added protection
Creased visor eliminates gaps and visor profile follows contours of the face for maximum protection, allowing full unrestricted head movement
Design allows the visor to be tilted whilst leaving the earmuffs in place covering the ears. It also facilitates the wearing of the earmuffs without compromising the attenuation, whilst maintaining a maximum area of facial coverage
Visor selection can be tailored to the specific hazard/application: mechanical, chemical, heat etc.
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EMI/RFI protection Aluminium, wire mesch or cloth shielding
size between 9 up to 100 mm of diameter
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ZIP-EX-2® Zippered Cable Shielding
ZIP-EX-2 cable shielding provides convenient, EMI and EMP shielding of cable harnesses for computers, communications equipment and other interference-sensitive electronic systems. It can be zipped on and off quickly, before or after the cable is installed.
The shielding medium is Ferrex knitted wire mesh with a protective cover of heavy-duty vinyl, a combination that provides flexibility and durability as well as positive shielding. A brass slide fastener with rugged teeth crimped to a steel cord inside the knitted wire mesh provides continuous positive closure.
SHIELD WRAP™ Wire Mesh Tape
SHIELD WRAP™ wire mesh EMI shielding tape is designed to wrap easily around cables and harnesses, and will reduce corona discharge in addition to providing EMI shielding. It has excellent flexibility and conforms easily to irregular and complex surfaces. SHIELD WRAP is produced as a two-ply, flattened cylinder of varying widths, loop spacings, wire sizes and metals. Standard mesh is either monel or Ferrex (tin-plated, copper-clad steel).
CHO-JAC® Flat Cable Shielding
CHO-JAC® shielding is a high quality, flat cable jacket designed to attenuate RF signals and bring digital electronic devices into EMC compliance at an attractive cost. This lightweight, flexible jacket is designed with a 360-degree aluminum or copper shield bonded with a metal overlap to a polyester layer. Metal-to-metal contact is established as the jacket wrap is completed. This design provides the maximum EMI shielding when properly sealed and terminated. Integral wires simplify folding and termination, and provide crack resistance. CHO-JAC shielding passes the flame retardancy requirements of UL specification 94V-0.
CHO-SHRINK® Heat Shrinkable Plastic Tubing
CHO-SHRINK® tubing is a heat shrinkable polyolefin tubing, which provides effective EMI shielding for cables, connectors and cable/connector terminations. CHO-SHRINK tubing offers significant weight savings over conventional metal braid shield. Chomerics' unique conductive coating is applied to the surface of the tubing and remains flexible, uniform and intact even after maximum shrinking. CHO-SHRINK tubing is available in standard thin-wall sleeves, molded boots, transitions and breakouts.
CHO-SORB® Ferrite EMI Attenuators
Cost-effective CHO-SORB® EMI ferrites reduce conducted emissions on signal lines and power cables without affecting data transmission. Chomerics' CHO-SORB ferrite attenuators allow desired signals to pass through cables or circuits while absorbing extraneous and unwanted energy. Low frequency and DC see only the conductor and are unimpeded. CHO-SORB attenuators reduce EMI for compliance with FCC, EC, VDE, and CISPR 22 limits. They install easily with no grounding required. Many configurations are available from Chomerics and through our authorized distributors.
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S1711 Product Family:
Description:
RFI Shield Grounding Clip - Midi
Features:
Packed in Bags, Beryllium Copper. See S1711R for product in Tape and Reel.
Finish:
Tin
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S1721 Product Family
Description:
RFI Shield Grounding Clip - Mini
Features:
Packed in Bags, Beryllium Copper. See S1721R for product in Tape and Reel.
Finish:
Tin
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ShieldZip™ is a flexible, cost effective EMI/EMP shielding jacket for easy installation, routing around corners or retro fitting of cable bundles or harness applications. ShieldZip™ combines the shielding effectiveness of multi layered knitted wire mesh, heavy duty brass zipper and a protective durable jacket. Heavy duty brass zipper is permanently crimped to a mesh cord and attached to a mesh jacket which creates a continuous positive closure. Vinyl jackets are optional. ShieldZip™ is available in diameters ranging from one inch to six inches and up to fifty foot continuous lengths. Finished ends are terminated and supplied ready for installation. Unfinished ends are left open for you to terminate to your specific requirement. Self Termination Kits are available.
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A current-carrying twisted pair is superior to parallel conductors, but is of limited effectiveness in reducing electromagnetic radiation. Correspondingly, the twisted pair is limited in avoiding unwanted pickup of external H-fields (D.C. to 100 KHz).
Inter-8® Weave Cable substantially reduces magnetic field pickup and radiation compared with conventional twisted pair cable. Our cable involves four separate conductors braided into interlocking loops and is a patented design of Magnetic Shield Corporation. In application, adjacent conductors 90º apart are connected together, effectively providing a two conductor circuit.
Because the Inter-8® Weave Cable design incorporates parallel conductors, the cable provides double the current carrying capacity of a two wire cable of the same AWG size. In contrast to conventional twisted pair, INTER-8 WEAVE does not kink or untwist when left free.
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Inter-8® Weave Cable has applications to many interference problems. Current-carrying conductors generating interference fields can be replaced with INTER-8 WEAVE cable to substantially reduce radiation. In low impedance circuits where external interference results in disturbing signals, Inter-8® Weave Cable will reduce the circuit sensitivity to the external fields. Among typical applications are cable connections to strain gages, thermocouples, photoelectric detectors, audio coils and transformers, piezoelectric transducers and preamplifiers.
SPIRA-SHIELD is flexible conduit that provides high permeability magnetic shielding for sensitive cables and conductors. Constructed of .010" thick CO-NETIC AA Alloy, SPIRA-SHIELD provides greater attenuation than braided sleeving and also furnishes physical protection. Among typical applications are ground support and communication equipment, shipboard control systems, audio-level interconnections, sensitive instrumentation and aerospace apparatus.
Co-Netic® Braided Sleeving, constructed of 36 or 34 AWG CO-NETIC AA high permeability wire, provides superior flexibility compared to foil that is spiral or channel wrapped around cable.
CO-NETIC AA wire in .005" diameter is widely used in magnetic shielding braid applied over cables. All gauges have applications where high permeability, low coercive force and ferromagnetic properties are required. CO-NETIC AA wire is corrosion resistant and has an affinity for solder. Meets MIL-N-14411, Composition I.
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Protecting sensitive equipment from external magnetic interference can assure optimum performance and extend apparatus life. Custom-designed to fit user needs, our ROOMS & ENCLOSURES can also provide a useful degree of RF shielding.
We provide many different shapes and sizes of cryogenic & vacuum shielding CHAMBERS, up to 8 feet in diameter. Constructed of CO-NETIC AA alloy, these shields provide practical, durable solutions to problems of magnetic interference in laboratories or industrial environments.
Our ZERO-GAUSS CHAMBERS are fabricated from high permeability CO-NETIC AA alloy in a series of two or more concentrically spaced magnetic shields. Scientific, industrial and commercial applications include testing, calibration of instruments, and product manufacture.
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Mica has a high dielectric strength and excellent chemical stability, making it a favored material for manufacturing capacitors for radio frequency applications. It has also been used as an insulator in high voltage electrical equipment. It is also birefringent and is commonly used to make quarter and half wave plates.
We use transparent natural mica, which has been important in the electrical/electronic industry in such applications as electron tubes,sight windows, capacitors, generators, and insulating spacers for semiconductors.
Mica is very stable at high temperatures, and possesses some attractive electrical properties. It is flexible, chemically inert, and has good mechanical strength perpendicular to the lamina.
We provide mica parts fabricated to your specifications and drawings.
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Magnetic Shield Corp.'s Lab Kits are highly effective in solving design problems of magnetic interference. (D.C. to 100 kilohertz). By adding MU METAL, CO-NETIC and NETIC layers until desired attenuation is achieved, minimum material requirements can be determined. This results in significant cost savings in the final design.
An important advantage of the "hands-on" shielding approach is that changes in a circuit layout, shield configuration, power levels and component orientation are easily evaluated. The Lab Kit permits magnetic shields to be designed and modified until required performance is obtained. The prototype then serves as a model for production.
As a special offer to introduce you to the exceptional characteristics of our CONETIC and NETIC proprietary alloys, Magnetic Shield has assembled the LK110-IS Lab Kit with Gaussmeter. Containing all the same wide variety of CONECTIC and NETIC alloys as both the LK-120 and LK-110 Lab Kits, the Internet Special Lab Kit also contains a Gaussmeter, This combination of materials and meter is offered for a reduced cost of $199.95.
The EF-401 Gaussmeter is a cost effective, handheld, single-axis magnetic field meter that provides the user with a quick, reliable and easy way to measure electromagnetic field (EMF) radiation levels.
Purchase an LK-110-IS and save 10 per cent off the retail price of the Kit and the Gaussmeter.
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MU METAL® offers important electromagnetic field shielding characteristics, including very high magnetic permeability - its ability to absorb magnetic energy. The unique properties of this family of alloys results in the highest possible attenuation, making these shielding alloys the materials of choice for reducing low-frequency electromagnetic interference (EMI).
MU METAL® is a trademarked brand of Magnetic Shield Corporation. MU METAL® meets MILSPEC 14411C, composition 1. When the specification or the application calls for a magnetically soft or high permeability material, MU METAL® can frequently be successfully applied.
MU METAL® magnetic shielding prevents magnetic fields from reaching areas where they would cause magnetic interference. Magnetic shielding is used around either the source of interference, to prevent electromagnetic radiation from leaving a device; or more typically, around a sensitive device, to prevent the electro magnetic interference (EMI) from disrupting normal operations.
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Like an unseen virus, magnetic interference can infect the systems of any medical electronic product or equipment. When medical devices must render the clearest, sharpest "image" possible by translating magnetic fields into digital data, magnetic shielding concerns, and image clarity issues are magnified.
As "the preferred source" of magnetic shielding for more than 65 years, Magnetic Shield Corporation has provided custom shield design assistance to many engineers, designers, and manufacturers of medical imaging devices, as well as R&D for future medical apparatus.
Our foundation of EMI engineering and our reputation for quality dates back to the earliest days of medical imaging, when Magnetic Shield provided shields installed around the first Cathode Ray Tubes in early televisions and X-ray monitors. As electonics and imaging have progressed through the decades, so too, has Magnetic Shield. We have participated in many advancements, continually rising to challenges presented by technology advancements.
Our proprietary materials MU METAL®, CO-NETIC® and NETIC® have been designed specifically for magnetic shielding. All are stocked, in sheet and foil of various thicknesses and widths. We also stock a vast array of wire, cable, conduit and braided sleeves. We can provide these specialty materials, or custom manufacture simple and complex magnetic shield shapes for you.
Medical equipment and products are one of the largest channels within our business, which make us experts in this field. For over 67 years, Magnetic Shield Corporation has been "the preferred source."
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A Double Shield TBM consists of a rotating cutterhead mounted to the cutterhead support, followed by three shields: a telescopic shield (a smaller diameter inner shield which slides within the larger outer shield), a gripper shield and a tail shield.
In normal operation ("double shield mode"), the gripper shoes are energized, pushing against the tunnel walls to react the boring forces. The main propel cylinders are then extended to push the cutterhead support and cutterhead forward. The rotating cutterhead cuts the rock. The telescopic shield extends as the machine advances keeping everything in the machine under cover and protected from the ground surrounding it.
The gripper shield remains stationary during boring. A segment erector is fixed to the gripper shield allowing pre-cast concrete tunnel lining segments to be erected while the machine is boring. The segments are erected within the safety of the tail shield. It is the Double Shield's ability to erect the tunnel lining simultaneously with boring that allows it to achieve such high performance rates. The completely enclosed shielded design provides the safe working environment.
If the ground becomes too weak to support the gripper shoe pressure, the machine thrust must be reacted another way. In this situation, the machine can be operated in "single shield mode". Auxiliary thrust cylinders are located in the gripper shield. In single shield mode they transfer the thrust from the gripper shield to the tunnel lining. Since the thrust is transferred to the tunnel lining, it is not possible to erect the lining simultaneously with boring. In the single shield mode, tunnel boring and tunnel lining erection are sequential operations.
Regardless of the operating mode, working crews remain protected within the shields. Robbins Double Shield TBMs are capable of safely excavating a wide range of geologic conditions on a project. Our Double Shield TBMs are manufactured to suit your project requirements, in diameters from 1.6 m to 15 m (5 to 50 ft).
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Robbins Single Shield TBMs protect workers from broken rock until the tunnel lining can be safely installed. The body of the machine is enclosed in a shield that is marginally smaller than the diameter of the tunnel. The flat, low-profile cutterhead minimizes disturbance of the face as it bores, and prevents large blocks from collapsing and causing excessive boring stresses. The front of the TBM is a rotating cutterhead that matches the diameter of the tunnel. As the cutterhead turns, a ring of hydraulic cylinders provides forward thrust through shoes that push against the tunnel lining. The cutterhead holds disc cutters (ranging from 11" to 20" in diameter) positioned for optimal boring. The transfer of high thrust through the rolling disc cutters creates fractures in the rock, causing chips to break away from the face. Boring and lining installation are performed sequentially. To steer, cylinders orient the articulated cutterhead in the required direction.
Robbins Single Shield TBMs are available in diameters from 1.6 to 15 m (5 to 50 ft). All Single Shields are equipped with high-speed segment erectors for rapid tunnel lining installation. To steer the machine, the cutterhead is articulated. The short shield length enables a small turning radius and minimizes exposure to squeezing ground forces that could potentially trap the machine.
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This type of boring machine is used for tunneling in stable to unstable rock for the excavation of traffic tunnels (road and rail), supply tunnels (water, gas and electricity) and other special applications.
The main elements in the construction of the shield tunnel boring machine are the shield which gives the machine its name, a construction like a steel tube in which all other components of the machine are embedded, the cutter head and its drive housing, the advance mechanism and the robot-like device for installation of the tunnel lining, the so-called erector. The tunnel lining, usually consisting of prefabricated concrete sections, is installed with the erector, protected by the rear shield mantle, the so-called tail shield.
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This type of boring machine is used for tunneling in stable to unstable rock for the excavation of traffic tunnels (road and rail), supply tunnels (water, gas and electricity) and other special applications.
The main elements in the construction of the shield tunnel boring machine are the shield which gives the machine its name, a construction like a steel tube in which all other components of the machine are embedded, the cutter head and its drive housing, the advance mechanism and the robot-like device for installation of the tunnel lining, the so-called erector. The tunnel lining, usually consisting of prefabricated concrete sections, is installed with the erector, protected by the rear shield mantle, the so-called tail shield.
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