Engineer and Technician » Resources for Engineers

Globe Valve

Neal Babcock — Thu, 29 Oct 2009 21:34:57 +0000

A Globe valve is a type of valve used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body.

Globe Valves are named for their spherical body shape with the two halves of the body being separated by an internal baffle. This has an opening that forms a seat onto which a movable plug can be screwed in to close (or shut) the valve. The plug is also called a disc or disk. In globe valves, the plug is connected to a stem which is operated by screw action in manual valves. Typically, automated valves use sliding stems. Automated globe valves have a smooth stem rather than threaded and are opened and closed by an actuator assembly. When a globe valve is manually operated, the stem is turned by a handwheel.

Although globe valves in the past had the spherical bodies which gave them their name, many modern globe valves do not have much of a spherical shape. However, the term globe valve is still often used for valves that have such an internal mechanism. In plumbing, valves with such a mechanism are also often called stop valves since they don’t have the global appearance, but the term stop valve may refer to valves which are used to stop flow even when they have other mechanisms or designs.

Globe valves are used for applications requiring throttling and frequent operation. For example, globe valves or valves with a similar mechanism may be used as sampling valves, which are normally shut except when liquid samples are being taken. Since the baffle restricts flow, they’re not recommended where full, unobstructed flow is required.

Body

The main pressure containing structure of the valve and the most but easily identified as it forms the mass of the valve. It contains all of the valve’s internal parts that will come in contact with the substance being controlled by the valve. The bonnet is connected to the body and provides the containment of the fluid, gas, or slurry that is being controlled.

Globe valves are typically two-port valves, although three port valves are also produced. Ports are openings in the body for fluid flowing in or out. The two ports may be oriented straight across from each other on the body,[5] or oriented at an angle such as a 90° angle. Globe valves with ports at such an angle are called angle globe valves. A globe valve can also have a body in the shape of a y’.

Bonnet

Provides leakproof closure for the valve body. The threaded section of stem goes through a hole with matching threads in the bonnet. Globe valves may have a screw-in, union, or bolted[7] bonnet. Screw-in bonnet is the simplest bonnet, offering a durable, pressure-tight seal. Union bonnet is suitable for applications requiring frequent inspection or cleaning. It also gives the body added strength. A bonnet attached with bolts is used for larger or higher pressure applications. Bonnets also contain the packing, which is a wearable material that maintains the seal between the bonnet and the stem during valve cycling.

The closure member of the valve. Plugs are connected to the stem which is slid or screwed up or down to throttle the flow. Plugs are typically of the balance or unbalanced type. Unbalanced plugs are solid and are used with smaller valves or with low pressure drops across the valve. The advantages are simpler design, with one possible leak path at the seat and usually lower cost. The disadvantages are the limited size; with a large unbalanced plug the forces needed to seat and hold the flow often becomes impractical. Balanced plugs have holes through the plug. Advantages include easier shut off as the plug does not have to overcome static forces. However, a second leak path is created between the plug and the cage, cost is generally higher.

Stem

The stem serves as a connector from the actuator to the inside of the valve and transmits this actuation force. Stems are either smooth for actuator controlled valves or threaded for manual valves. The smooth stems are surrounded by packing material to prevent leaking material from the valve. This packing is a wearable material and will have to be replaced during maintenance. With a smooth stem the ends are threaded to allow connection to the plug and the actuator. The stem must not only withstand a large amount of compression force during valve closure, but also have high tensile strength during valve opening. In addition, the stem must be very straight, or have low run out, in order to ensure good valve closure. This minimum run out also minimizes wear of the packing contained in the bonnet, which provides the seal against leakage. The stem may be provided with a shroud over the packing nut to prevent foreign bodies entering the packing material, which would accelerate wear.

Cage

The cage is part of the valve that surrounds the plug and is located inside the body of the valve. Typically, the cage is one of the greatest determiners of flow within the valve. As the plug is moved more of the openings in the cage are exposed and flow is increased and vice versa. The design and layout of the openings can have a large effect on flow of material (the flow characteristics of different materials at temperatures, pressures that are in a range). Cages are also used to guide the plug to the seat of the valve for a good shutoff, substituting the guiding from the bonnet.

Seat ring

The seat ring provides a stable, uniform and replaceable shut off surface. Seat rings are usually held in place by pressure from the fastening of the bonnet to the top of the body. This pushes the cage down on the lip of the seat ring and holds it firmly to the body of the valve. Seat rings may also be threaded and screwed into a thread cut in the same area of the body. However this method makes removal of the seat ring during maintenance difficult if not impossible. Seat rings are also typically beveled at the seating surface to allow for some guiding during the final stages of closing the valve.

Economical globe valves or stop valves with a similar mechanism used in plumbing often have a rubber washer at the bottom of the disc for the seating surface, so that rubber can be compressed against the seat to form a leak-tight seal when shut.

Materials

Typically globe valves are made of metallic alloys, although some synthetic materials are available. These materials are chosen based on pressure, temperature, controlled media properties. Corrosive and/or erosive process streams may require a compromise in material selection or exotic alloys or body coatings to minimize these material interactions and extend the life of the valve or valve trim components. Typically, carbon steel alloys are specified for noncorrosive applications. Other alloys such as Hastelloy, Monel, Inconel and others are available.

Packing material must also be considered during valve selection. Typically the requirement for a low friction packing conflict with a durable material that will provide low maintenance requirements during service life. Corrosive applications can further complicate packing material selection as the typical packing materials may or may not be compatible with the processed materials. Typically graphite or PTFE is used due to its low friction coefficient. Enviro-seal applications also have the availablilty of constant applied force (live-load) packing. While more complex, it allows for constant packing force load throughout the life of the packing material. This packing helps meet contemporary environmental laws.

(text and images courtesy of Wikipedia)

Ball Valve

Neal Babcock — Tue, 20 Oct 2009 12:30:51 +0000

A ball valve is a valve that opens by turning a handle attached to a ball inside the valve. The ball has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and flow is blocked. The handle or lever will be inline with the port position letting you “see” the valve’s position. The ball valve, along with the butterfly valve and plug valve, are part of the family of quarter turn valves. Ball valves are durable and usually work to achieve perfect shutoff even after years of disuse. They are therefore an excellent choice for shutoff applications (and are often preferred to globe valves and gate valves for this purpose). They do not offer the fine control that may be necessary in throttling applications but are sometimes used for this purpose.

Ball valves are used extensively in industry because they are very versatile, supporting pressures up to 10,000 psi and temperatures up to 200 Deg C. Sizes from 1/4″ to 12″ are readily available. They are easy to repair, and operate manually or by actuators.

The body of ball valves may be made of metal, plastic or metal with a ceramic center. The ball is often chrome plated to make it more durable.
[edit] Types of ball valve

Types of Ball Valves

There are five general body styles of ball valves: single body, three piece body,split body, top entry, and welded.

There are three general types of ball valves according to bore

* A full port ball valve has an over sized ball so that the hole in the ball is the same size as the pipeline resulting in lower friction loss. Flow is unrestricted, but the valve is larger. This is not required for general industrial applications as all types of Valves used in industry like Gate Valves, Plug Valves, Butterfly valves etc have restrictions across the flow and does not permit full flow. This leads to excessive costs for full bore ball valves and is genearlly a unneccessary spending for customers.

* In reduced port ball valves, flow through the valve is one pipe size smaller than the valve’s pipe size resulting in flow area becoming lesser than pipe. But the flow discharge remains constant as it is a Multipler factor of Flow discharge(Q) is equal to Area of Flow (A) into Velocity (V). A1V1=A2V2 i.e the Velocity increase with reduced Area of flow and Velocity decreases with increased area of flow.

* A V port ball valve has either a ‘v’ shaped ball or a ‘v’ shaped seat. This allows the orifice to be opened and closed in a more controlled manner with a closer to linear flow characteristic. When the valve is in the closed position and opening is commenced the small end of the ‘v’ is opened first allowing stable flow control during this stage. This type of design requires a generally more robust construction due to higher velocities of the fluids, which would quickly damage a standard valve.

* A trunnion ball valve has a mechanical means of anchoring the ball at the top and the bottom, this design is usually applied on larger and higher pressure valves (say, 4″ and above 600 psi and above).

Manually operated ball valves can be closed quickly and thus there is a danger of water hammer. Some ball valves are equipped with an actuator that may be pneumatically or motor (electric) operated. These valves can be used either for on/off or flow control. A pneumatic flow control valve is also equipped with a positioner which transforms the control signal into actuator position and valve opening accordingly.

Engineering Organizations

Neal Babcock — Sat, 01 Aug 2009 00:40:34 +0000

These are the professional organizations for the more common types of engineering.

American Institute of Aeronautics and Astronautics

American Society of Mechanical Engineers

American Institute of Chemical Engineers

Architectural Engineering Institute

Biomedical Engineering Society

Institute of Electrical and Electronics Engineers

Society of Petroleum Engineers

Operator Interfaces

Neal Babcock — Tue, 02 Jun 2009 21:17:52 +0000

There are a number of companies who make Operator Interfaces. Here are some of the most popular.

Allen-Bradley – Milwaukee, WI

http://www.rockwellautomation.com

Allen-Bradley graphic terminals from Rockwell Automation offer rugged electronic interface solutions in a variety of sizes and configurations.

Maple Systems, Inc. – Everett, WA
Manufacturer, Custom Manufacturer

http://www.maple-systems.com/

Manufacturer of rugged operator interface terminals with both alphanumeric & graphic displays. These OITs communicate with over 80 manufacturers of PLCs & motion control products.

QSI Corporation – Salt Lake City, UT

Manufacturer, Custom Manufacturer

http://www.qsicorp.com/product/industrial/

Manufacturer of rugged operator interface terminals. Ruggedized character & graphic operator interfaces are available in a variety of customizable configurations, & built to withstand a wide range of environmental conditions.

Strongarm Designs, Inc. – Horsham, PA

Distributor, Manufacturer, Custom Manufacturer

http://www.strongarm.com

Manufacturer of operator interface instrument panels, enclosures, pendant arm mountings & complete systems including displays, keyboards, pointers, PC’s & hazardous area.

Cuny & Guerber, Inc. – Union City, NJ

Distributor, Custom Manufacturer

http://www.cuny.biz

Distributor of operator interfaces. Operator interface touchscreens are available in screen sizes of 3.8 in., 5.7 in., 7.5 in., 10.4 in., 12.1 in., & 15 in. Pixel resolutions available include 320 x 240, 640 x 480 & 800 x 600. Features include high visibility screens, alalog touch pads, adjustable…

Brand Names: Xycom

Steven Engineering

Distributor, Custom Manufacturer

http://stevenengineering.com/Prod_Serv/operator_interface.html

Distributor of operator interfaces. Operator interfaces are suitable for industrial, commercial & mechanical applications.

Brand Names: AMP, AVG, Agastat, Anderson Power Products, Aurora Air Products, Banner, C&A, Carlingswitch,…

American Crane & Equipment Corp. – Douglassville, PA

Manufacturer, Custom Manufacturer, Service Company

http://store.americancrane.com/viewitems/crane-and-hoist-components-electri…

Custom manufacturer of operator interfaces including PLCs. Interfaces available in various types.

AutomationDirect.com (Automation Direct) – Cumming, GA

Distributor, Custom Manufacturer

http://www.automationdirect.com/operatorinterface

Operator interfaces for process control systems including 6 in., 8 in. ,10 in., 12 in. & 15 in. touchscreen panels, text display panels & micro-graphic panels. Low prices on heavy duty flat LCD display panels for industrial environments.

Brand Names: Cutler-Hammer, Edison Fuse, Fuji Electric, Hitachi, Koyo, Marathon Electric, Hubbell/Wiegmann

Red Lion Controls – York, PA

Manufacturer, Custom Manufacturer

http://www.redlion.net/Products/HumanMachineInterface/OperatorInterface.htm…
Custom manufacturer of a full line of industrial instrumentation & control products including digital & analog panel meters, web-enabled operator interfaces & PID process control solutions

Automation Systems Interconnect, Inc. – Mechanicsburg, PA

Manufacturer, Custom Manufacturer

https://www.asi-ez.com/member/x407-Custom-Interface-Modules.asp?l=rm

Manufacturer & distributor of broad range of operator interfaces, DIN rail & PCB terminal blocks to fit every application. Large selection of automation/connector accessories such as distribution boxes, connectors, special sensor terminal blocks

>Electrical South Inc. – Greensboro, NC

Manufacturer, Service Company

http://www.elsouth.com/repair-services/operator-interface.aspx

Distributor of remanufactured & used operator interfaces including human machine interface (HMI) for industrial applications. Capabilities include repairing, reconditioning & rebuilding.

Brand Names: Bailey, Cutler-Hammer, Reliance, Eagle, Eurotherm, General Electric, Honeywell, IDT, Modicon

Electrone Americas Ltd. – Boca Raton, FL

Distributor, Manufacturer, Custom Manufacturer

http://www.electrone.com/content.php?ref=page_soln1

Custom manufacturer & distributor of operator interfaces including touchscreen operator interfaces for applications including computers, custom data entry, point of sale/purchase data capture & kiosk & security applications. Operator interfaces for computers include keyboards, keypads & trackballs.

Tolomatic, Inc. – Hamel, MN

Manufacturer, Custom Manufacturer

http://www.tolomatic.com/products/item_detail.cfm?tree_id=215

ISO 9001:2000 certified custom manufacturer of operator interfaces. Features of operator interfaces include flush or surface mounting, 20-character LCD display & motor & encoder cable.

HED – Hydro Electronic Devices, Inc. – Hartford, WI

Manufacturer, Custom Manufacturer, Service Company

http://www.hedonline.com/products.htm

Designer/manufacturer of custom visual control operator interface monitoring systems. Programmable display/menu screen that monitors, controls, provides real time diagnostics in one unit to allow the operator status/analysis of entire working system.

Hitachi Electronic Devices Inc. – Suwanee, GA

Manufacturer, Custom Manufacturer

http://www.hedus.com/

Liquid Crystal Displays (Active (TFT) & Passive (STN/CSTN) matrix), high brightness, wide viewing angle, wide temperature range, optional integrated touch panel. Standard modules & custom designs available. Many standard modules in stock. LCD development kits available for LCD design of hardware

>Pro-Face America (Xycom) – Saline, MI

Manufacturer, Custom Manufacturer, Service Company

http://www.profaceamerica.com/cms/site/2bd562045e0cd697/index.html

Manufacturer of human machine interface (HMI) computers. Various models with features including USB, ethernet, flash, video & audio connectivity & data management integration. Applications include factory floor automation & reporting, conveyor systems, water treatment ,tank gauging, fill, form,…

Brand Names: Xycom, Proface-Xycom

>Santa Clara Systems – Alameda, CA

Distributor, Custom Manufacturer

http://www.santaclarasystems.com/index.html

Distributor of remanufactured & surplus electronic parts & industrial control & factory automation products. Products include distributed control systems, programmable logic controllers, drives & electronic modules. Specializing in hard to find parts; capabilities include facilitating the…

Brand Names: Gould, Siemens, Total Control Products, Xycom, Maple Systems, Mitsubishi, Spectrum Controls, Uticor

Golden Valley Products, Inc. – Minneapolis, MN

Manufacturer, Custom Manufacturer, Service Company

http://www.gvp-inc.net/products.asp

Custom membrane switches, sensors, graphic overlays, labels, pad printing, catheter printing – 360 degrees, quick turn prototypes, design & engineering.

>T.J. Snow Co., Inc. – Chattanooga, TN

Distributor, Manufacturer, Custom Manufacturer, Service Company

http://www.tjsnow.com/supplies/supplies.htm#controls
Distributor of operator interfaces including single phase resistance welding controllers with PLC operator interface, microprocessor based solid state welding control & resistance welder interlocks, single phase bench welder controllers, multi gun stepper controllers, 3 phase frequency converters &…

Brand Names: Entron, Miyachi, Medar, WTC, Unitrol

Sterling Services – Matthews, NC

Distributor, Custom Manufacturer, Service Company

http://www.sterlingservices.com/interfaces-operator-capabilities.html

Distributor of operator interfaces. Operator interfaces include relays, machine interfaces, circuit boards, sensors, photoelectrics, contactors, servo drives, PLC modules, AC & DC drives, speed controls, power supplies, starters, pressure, temperature & process controls, instruments, timers,…

Brand Names: CTC, Cutler-Hammer, Reliance, General Electric, Honeywell, Modicon, Nematron, Omron, Siemens,..

R. Stahl, Inc. – Houston, TX

Manufacturer, Custom Manufacturer

http://www.r-stahl.com/products-and-systems/operating-and-monitoring-system…

ISO 9001:2000 & ISO 9000:2000 certified custom manufacturer of operator interfaces for measuring, controlling, visualizing, integrated operating & monitoring applications. Operator interfaces are suitable for chemical & pharmaceutical industries.

McNaughton-McKay Electric Co. – Madison Heights, MI

Distributor, Custom Manufacturer

ISO 9001:2000 certified distributor of operator interfaces including digital billboards, electronic displays, outdoor displays & indoor displays. Features include battery powered rate meter & totalizer, mini 4.3 in. color graphic display panel with touch screen & set point generator with 0 V to 12…

Brand Names: Adaptive Micro Systems, Total Control Products, GNC Electro Systems, Allen-Bradley, Rockwell..

Parker Hannifin Automation Group – Rohnert Park, CA

Manufacturer, Custom Manufacturer

Worldwide manufacturer of industrial automation components including human machine interface (HMI) operator interfaces & touchscreen operator interfaces. Products include monochrome pushbutton touchscreens, color STN touchscreens, color DSTN touchscreens & color TFT touchscreens. Sizes range from 3…

Brand Names: Parvex, SSD

Industrial Workstation Furniture – Enclosures and Benches

Neal Babcock — Tue, 02 Jun 2009 19:28:28 +0000

Part of the job of specifying an HMI or a SCADA system involves getting the enclosure and industrial furniture to hold your equipment. Here is a list of a number of manufacturers of workstation and industrial enclosures.

Hoffman – Anoka, MN

Distributor, Manufacturer, Custom Manufacturer

http://www.hoffmanonline.com/

Hoffman is a leading designer and manufacturer of systems to safely and reliably protect the electronic controls and mission critical electrical systems in industrial, data communications, commercial construction and government applications.

Rittal – Urbana, OH

Distributor, Manufacturer, Custom Manufacturer

http://www.rittal-corp.com

RDM Industrial Products, Inc. – Milpitas, CA

http://www.rdm-ind.com/

Distributor, Manufacturer, Custom Manufacturer

Custom manufacturer & distributor of workstations for industrial, medical & electronic applications. Workstations include ball transfer, clean air, equipment rack, HEPA & vertical air HEPA workstations. Features include steel frame construction, adjustable-height overhead flow rack shelves,…

Stanley Vidmar – Allentown, PA

Manufacturer, Custom Manufacturer

http://stanleyvidmar.com/Vidmar/Products/Workstations+-+Benching

anufacturer of heavy-duty custom-configured workbenches/workstations. Choice of cabinets, drawers, work surfaces, accessories & capability for future expansion. Workstation cabinets available in 30, 33, & 59 inch heights; 30 & 22 1/2 inch widths; & a 27 3/4 inch depth, & custom sizes. Workstation…

AFC Industries, Inc. – College Point, NY

Manufacturer, Custom Manufacturer

http://www.afcindustries.com/Industrial_Workstation.shtml

Ergonomic Workstations, Computer Workstations, Computer Desks, Computer Furniture, Office Furniture, Ergonomic, Comfortable, Call Center Furniture, Office Ergonomics, Ergonomics, Armrests, Arm Rests, Backrests, Back Rests, Office Ergonomics, Ergonomics, Backrests, Back Rests, Ergo, Ergonomic/S,…

Lista International Corp. – Holliston, MA

Manufacturer

http://www.listaintl.com/files/indbench.aspx

Manufacturer of industrial workbenches featuring modular storage cabinet pedestals. Many options are available including workbench shelves, the Nexus accessory system & a variety of work surfaces. Available in stationary & mobile configurations.

Unex Manufacturing – Jackson, NJ

Manufacturer

http://www.unex.com/flowcell.htm

Manufacturer of complete track & rack modular order picking, assembly & storage workstations. “Mix & match” workstation components for assembly & set-up to create ergonomic stations suitable for picking, assembly or line side storage & small parts picking for manufacturing lines. Compatible with…

Pucel Enterprises, Inc. – Cleveland, OH

Distributor, Manufacturer, Custom Manufacturer

http://pucelgrizzly.rtrk.com/?scid=1014691&rl_alt=http%253A%252F%252Fwww.pu…

Manufacturer of industrial workstations including adjustable workstations & ESD workstations. Types include workstations with fluorescent light fixture, solid side workstations with bench riser shelf & electrical outlet strip & side drawer workstations. Workstations are available in height up to…

Global Equipment Co. – Port Washington, NY

Distributor, Manufacturer, Custom Manufacturer

http://www.globalindustrial.com/gcs/indexWorkBenches.web

Distributor of material handling workstations including adjustable workstations, ergonomic workstations & industrial workstations. Types of workstations or workbenches also include cabinet work benches, extra heavy duty work benches, extra long work benches, laboratory work benches, machine tables,…

Lyon Workspace Products – Aurora, IL

Manufacturer, Custom Manufacturer

http://catalog.lyonworkspace.com/viewitems/workspace-furniture/electronic-a…

ISO 9001:2000 certified custom manufacturer of mobile workstations for industrial applications. Mobile workstations are available in 36 5/16 in. W x 21 1/8 in. D x 37 5/16 in. H to 27 13/16 in. W x 18 1/8 in. D x 32 5/8 in. H dimensions with 18 in. extended platforms.

Creform Corp. – Greer, SC

Manufacturer, Custom Manufacturer

http://www.creform.com/products/Work%20Station.pdf

Manufacturer of a pipe & joint material handling system. Lets the customer design & build custom workstations, tables, & support structures. Standard & ESD available.

Brand NamesCreform, TexTube

Vistamation, Inc. – Fallbrook, CA

Distributor, Custom Manufacturer, Service Company

http://vistamation.com/industrial_workstations_from_iac.htm

Distributor of wear resistant industrial workstations with powder-coat finishing. Industrial workstations are available with tubular steel welded leg assemblies, front & rear heavy-gauge top support beams, recessed handles, metal ball-bearing slides on drawers, 1 1/4 in. work surface & 125 lbs. to…

Brand NamesECD

SJF Material Handling Equipment – Multiple Locations

Distributor, Manufacturer, Custom Manufacturer, Manufacturers’ Rep, Service Company

http://www.sjf.com

Distributor of material handling workstations including ergonomic, ESD, industrial & mobile workstations. Available as adjustable work tables & heavy duty workbenches. Adjustable work tables include adjustable work benches, economy electrical workbenches, industrial adjustable workbenches,…

Meyer Material Handling Products, Inc. – Indianapolis, IN

Distributor, Manufacturer, Custom Manufacturer, Service Company

http://www.meyermat.com/

Workstations, mobile, ergonomic, industrial, manufacturing, modular drawer cabinets, benches, tables, in-plant offices, partitions, chairs, material handling equipment, pallet, hand/platform trucks, conveyors, carts, mezzanines, cranes, hoists, bins, totes, containers, shelving, decking, racks,…

Eagle MHC – Clayton, DE

Manufacturer, Custom Manufacturer

http://www.eaglegrp.com/foodServiceClass.asp?id=FoodServiceHome

Manufacturer & custom manufacturer of worstations including ESD workstations, adjsutable workstations, computer, industrial, laminar flow, & mobile workstations. Work tables with backsplash & galvanized tubular base, adjustable shelves, flat top & stainless steel base with adjustable under shelves,…

Media Blast & Abrasive, Inc. – Brea, CA

Manufacturer, Custom Manufacturer, Service Company

http://www.mediablast.com/tornado-down-draft-lit1.asp

Manufacturer of a full range of abrasive blasting cabinets & downdraft pollution control workbenches including the Tornado workbench for applications involving the collection of nuisance dust. Over 175 standard models including custom, automated & special part holding fixturing.

LINAK U.S., Inc. – Louisville, KY

Distributor, Manufacturer

http://www.linak.com/Business/?id2=11

DC actuators & lifting columns plus a full range of related electronic controls manufactured in accordance to specs set forth in ISO 9001. Forces from 20 lb. to 225 lb., acme or ballscrew-synchronized run of several actuators or columns with or without memory for a wide range of applications.

Rousseau Metal, Inc. – St. Jean-Port-Joli, QC CAN

Manufacturer, Custom Manufacturer

http://www.rousseaumetal.com/Cart/WorkCenter.aspx?lg=en&Cat=WSWM

Manufacturer of modular industrial workstations / work benches, stationary & mobile, that are rugged, reliable & engineered for any work environment & application. The system comes in a multitude of layouts & dimensions. Many options available including drawers & cabinets for below the workbench….

Brand NamesRousseau

Unidex, Inc. – Warsaw, NY

Manufacturer, Custom Manufacturer, Service Company

http://www.unidex-inc.com/product.htm

Manufacturer of standard & custom ergonomic & industrial workstations. Types include workbenches with load capacities up to 1,000 lbs. & electric/hydraulic lift system & workbenches with a manually operated foot pedal. Available in solid maple, steel, aluminum, stainless steel, ESD, or standard…

Harrison Equipment Co., Inc. – Kent, WA

Distributor, Custom Manufacturer

http://www.harrisonequipment.com/catalog/index.php?cPath=700_730_731

Woman owned distributor of workstations for industrial & commercial applications. Workstations are available in various models & sizes including 60 in. x 30 in. & 70 in. x 30 in. column heads & up to 158 lb. weight.

Latta Equipment Co., Inc. – Charlotte, NC

Distributor, Custom Manufacturer, Manufacturers’ Rep, Service Company

http://catalog.lattaequipment.com/store/WorkBenches/

Distributor & rep. of industrial workstations. Supplier of material handling equipment & industrial vacuum cleaners. Assistance available.

Tennsco Corp. – Dickson, TN

Manufacturer, Custom Manufacturer

http://www.tennsco.com/techwork.htm

Custom manufacturer of technical workstations for industrial applications. Features of technical workstations include 30 in. to 39 in. adjustable legs, 42 1/4 in. upright frames, 5 3/4 in. height circuit breakers, handy on-off switches, storage modules, adjustable modules & levelers, sturdy steel,…

Ted Thorsen, LLC – Wilkes Barre, PA

Distributor, Manufacturer, Custom Manufacturer

http://www.tedthorsen.com/workbenches.aspx

Worldwide manufacturer of custom & standard workstations including electronic, ergonomic, ESD & industrial workstations. Types of workstations include document stands, table height adjustment kits, workbenches, inspection stands, mobile repair carts, mobile tool carts & mobile & packing…

Brand NamesPush n’ Place, Dyna-Lift, Metro SmartBench

Bastian Material Handling – Indianapolis, IN

Distributor, Manufacturer, Custom Manufacturer, Service Company

http://www.bastiansolutions.com/products/workbenches-and-workstations/defau…

Manufacturer & distributor of standard & custom industrial workstations. Workstations are modular, ergonomic & custom designed. Types include workstations used in technical, laboratory, cleanroom & manufacturing applications. Technical workstations are designed to support the multi-tasking nature…

Brand NamesBoston Technical, Dehnco, Lyon Workspace Products

Assembly & Automation Technology, Inc. – Woburn, MA

Manufacturer, Custom Manufacturer, Service Company

http://www.assemblyandautomationtech.com/workstations.html

Custom manufacturer of lean manufacturing & ergonomic assembly workstations for industrial applications. Workstations are semi automatic. Features include adjustable height bench, over-head light, housings & 2 flaps.

General Tool & Supply Co. – Multiple Locations

Distributor, Custom Manufacturer

http://generaltool.rtrk.com/?scid=1284475&rl_alt=http%253A%252F%252Fwww.gen…

Distributor of workstations including industrial workstations including ESD & electronic workstations. Field office portable workstations are available in dimensions including 43.5 x 62.5 x 79, 82 x 60 x 42 & 63 x 42 x 80. Jamco Products, Inc. – South Beloit, IL

Manufacturer, Custom Manufacturer

http://www.jamcoproducts.com/products/

Manufacturer of 300 models heavy duty, all-welded 12 gauge & stainless steel carts, trucks, platforms, mobile tables, & cabinets. Includes service, instrument, platform, ergonomic, panel, cabinet, security, bin & mil-duty. Shipped under “Quik Ship” Program.

Cardinal Integrated Systems – Louisville, KY

Manufacturer, Custom Manufacturer

http://www.theonlinecatalog.com/cardinalcarryor/store/WorkBenches/

Distributor of workstations including industrial workstations. Industrial workstations are available as handy industrial workstations. Features include pneumatic cylinder, adjustable safety stops & foot valve. Handy industrial workstations are available in platform sizes of 24 in. W x 80 in. L….

Protech Systems – Chino, CA

Distributor, Manufacturer, Service Company

http://www.protechsystems.com/presenc2.htm

Manufacturer & distributor of industrial & ergonomic workstations for use on automatic or manually activated machines. Workstations include hand stations & safety devices. Can be easily rotated & fixed up to 90 degrees forward from horizontal. Available in size ranging from 12 in. to 24 in….

Industrial Workstations Product Catalog:: Series 24/25-74 Work Station

Esmena USA, LLC – Cincinnati, OH

Distributor

http://www.shelving-direct.com/subcategories/work_stations/12.htm

Manufacturer & distributor of ESD workstations & industrial workstations. Products also include standard & T-bar workstations. Standard workstations range in dimensions from 72 in. x 30 in. x 78 in. to 96 in. x 36 in. x 78 in. (W x D x H). T-bar workstations are available in dimensions of 60 in. x…

Industrial Controls – Mountlake Terrace, WA

Distributor, Custom Manufacturer

http://www.industrialcontrolssupply.com/products.html

Distributor of industrial process automation & control equipment & components including workstations. Products also include industrial PCs, network interface cards, OPC-DDE servers, gateways & embedded network systems.

Brand NamesAdvantech

Amtek Tool & Supply, Inc. – Madison Heights, MI

Distributor, Custom Manufacturer

http://amtektool.thomasnet.com/category/all-categories?

Distributor of workstations including industrial workstations & mobile workstations. Workstations’ features include powder-painted steel frame, adjustable height to 46 in., working area of 24.3 in., 360 degrees rotation or fixed position, & slide hanger for horizontal motion.

Lab Fabricators Co. – Cleveland, OH

Manufacturer, Custom Manufacturer

http://labfab.thomasnet.com/category/laboratory-hospital-casework?

Custom manufacturer, distributor & designer of laboratory furniture including industrial & medical workstations. Other products including base, wall & storage cabinets, aprons, tables, counter tops, sinks, service fixtures & accessories.

Kinetic Technologies, Inc. (K-TEC) – Wickliffe, OH

Distributor, Manufacturer, Custom Manufacturer

http://www.industrialcartsktec.com/material_handling_conveyors.html

Manufacturer of industrial workstations engineered for lean manufacturing or forklift-free systems. Gravity flow buffer & workstation systems feature choice of two roller frame & ball transfer section sizes, layout flexibility accommodating lineside & setback constraints, rotational roller frame…

Advance Material Handling – Indianapolis, IN

Distributor, Custom Manufacturer, Service Company

http://www.amh4.com/

Distributor of industrial material handling products including custom workstations & adjustable workstations. Workstations are available in different sizes, styles & load capacities.

Dehnco Equipment & Supplies, Inc. – Barrington, IL

Distributor

http://www.dehnco.com/work/manifest.cfm

Custom manufacturer of workstations for industrial purposes. Workstations are available with 59 in. accessory stand, 64 in. x 17 in. flat shelf, sorter support bracket, slat panel, slat wall hook, 6 in. x 4 in. x 3 in. slat wall bin, keyboard tray, CRT tray, label dispenser & CRT mouse pad….

Brand NamesDehnco

Production Automation Corp. – Multiple Locations

Manufacturer, Custom Manufacturer

http://www.gotopac.com/category_s/2347.htm

Distributor of industrial workstations available in various models & dimensions. Various types of workstations including ESD, adjustable, ergonomic & electronic workstations are also available. Workstations are made from variety of materials including stainless steel.

Brand NamesProduction Basics

BenchPro, Inc. – Tecate, CA

Distributor, Manufacturer, Custom Manufacturer

http://www.benchdepot.com/index.html

Custom manufacturer of workstations including ergonomic benches with corner legs, recessed front legs & bench tops for industrial applications. Industrial workstations include formica, ESD, cleanroom conductive, maple, stainless steel top, abrasion resistant, chemical resistant, cleanroom laminate…

Busing Co., Inc. – Land O Lakes, FL

Distributor, Manufacturer, Custom Manufacturer, Manufacturers’ Rep, Service Company

http://www.busingco.com

Distributor of industrial workstations including assembly, ball transfer, ESD static control, height adjustable, benches, cleanroom, computer, electronic, pedestal, production, shipping, laboratory, laminar flow, LAN, packaging, shop, slide line, stainless steel, steel, technician, tilting, welded,…

Brand NamesAdapto, Aeromotive, Akro-Mils, All Metal, Boston Technical, Dehnco, Durand, EDSAL, Electra Tec,…

Innotech Products – Minneapolis, MN

Distributor, Manufacturer, Custom Manufacturer

http://www.innotechprod.com/work-stations-cleanroom-tables.html

Distributor of industrial workstations. Types of industrial workstations include solid stainless steel workstations, plastic laminate workstations, ESD workstations & custom workstations. Laminate workstations include electric height adjust workstations, heavy duty cantilever style workstations,…

diamondLife™ – Pittsburgh, PA

Distributor, Manufacturer, Custom Manufacturer

http://www.diamondlifegear.com/products.htm

Manufacturer of adjustable & mobile workstations for industrial applications. Specifications of workstations include maximum usable work area of 4.25 sq. ft., integral 44 in. X 6 1/2 in. pegboard & ability to fit 1/8 in. & 1/4 in. peg hooks. Workstations include wall-mount cantilever design, steel…

Aggressive Industrial Structures – Cottage Grove, MN

Distributor, Custom Manufacturer, Service Company

http://www.aggressiveindustrial.com/Workstations.htm

Distributor of workstations such as ESD workstations, ergonomic workstations, industrial workstations, mobile workstations & workstation benches & cabinets. Workstations include workbenches & chairs. Work benches feature adjustable working heights & double electrical knock-outs. Available in 48 in….

Brand NamesEDSAL, Pucel, Stackbin

ICP America, Inc. – Vista, CA

Distributor, Manufacturer, Custom Manufacturer

http://www.icpamerica.com/products/LCD_products/workstation/default.html

Manufacturer & distributor of industrial & computer workstations. Types include modular & rack mount PC workstations, portable medical panel workstations, panel mount & rack mount PC workstation. Medical panel PCs are available in rugged design. Workstations are available in 6.4 in. to 15 in. LCDs…

Mats, Inc. – Houston, TX

Distributor, Manufacturer, Custom Manufacturer

http://www.mats-inc.com/

Distributor of mats for commercial & industrial applications. Mats include anti-fatigue, anti-static, anti-slip tapes, anti-slip mats, carpet tiles, woven-back cocoa, vinyl backed cocoa, desk chair mats & runners, exterior & interior mats & runners, flexible steel, gym & weight room mats & tiles,…

Barrington Automation – Lake In The Hills, IL

Manufacturer, Custom Manufacturer

http://www.barringtonautomation.com/tslot/default.htm

Custom manufacturing of FRAME-WORLD structural aluminum extrusions & components provide a complete t-slot profile system that allows quick & easy design & assembly of machine bases & frames, stands, guard assemblies, material handling fixtures, safety guarding, robot safety fencing & tooling…

Stackbin Corp. – Lincoln, RI

Manufacturer, Custom Manufacturer

http://www.stackbin.com/products/p7230-t-2012-2012-series-mobile-table/

Manufacturer of standard & custom workstations including ESD workstations. Features include ESD laminated tops, grounding kits, over head structures & wrist straps.

Kontron – Multiple Locations

Manufacturer, Custom Manufacturer, Service Company

http://us.kontron.com/products/systems+and+platforms/embedded+box+pcs/box+p…

ISO 9001:2000, ISO 13485:2003 & ISO 14001:1997 certified custom manufacturer of industrial workstations including box computers. Specifications of box computers include 2.0 GHz processor, 145 mm W x 218 mm D x 270 mm H size, DRAM memory up to 2 GB, 2 in. x 2.5 in. removable internal drives &…

PC Enclosures – Wentzville, MO

Manufacturer, Custom Manufacturer

http://www.pcenclosures.net/products.html

Manufacturer of electronic computer workstations including LCD workstations, laptop workstations, LCD monitor enclosures & custom plastic LCD enclosures for industrial applications. Features include water tight, dust proof, mounting arm for LCD monitor, clear plastic window, gasket, optional drawer…

F.E. Bennett Co. – Portland, OR

Distributor, Custom Manufacturer, Service Company

http://febennett.rtrk.com/?scid=1179626&rl_alt=http%253A%252F%252Fwww.feben…

Distributor of ergonomic industrial workstations & benches, some with standard cabinets & drawers. 60 in. & 72 in. x 30 in. deep. Optional ESD tops & accessories, tool & bin holders, shelves, power strips, lights, footrests, monitor arms.

Central Material Handling – Cary, NC

Distributor, Manufacturer, Custom Manufacturer, Manufacturers’ Rep

http://www.theonlinecatalog.com/cmhnc/store/item.asp?ITEM_ID=563&DEPARTMENT…

Distributor of portable, ergonomic, platform, benches.

Reno Forklift, Inc. – Sparks, NV

Distributor, Custom Manufacturer, Service Company

http://www.renoforklift.com/linecard.php

Distributor of standard & custom industrial material handling equipment including workstations. Types include electronic workstations, technical workstations & assembly workstations. Workstations are available in different materials, styles & sizes

Engineering Information Sites

Neal Babcock — Fri, 01 May 2009 01:38:31 +0000

Analog Circuit Simulator Applet
Demonstrates various electronic circuits

Engineer Girl
For you ladies who are engineers, or thinking about it

The National Academy of Engineering
Promoting the technological welfare of the nation

Top Ten Engineering Colleges

Neal Babcock — Tue, 31 Mar 2009 00:20:04 +0000

1 Massachusetts Institute of Technology

2 Stanford University

3 University of California-Berkeley

4 California Institute Technology

5 University of Illinois at Urbana-Champaign

6 Georgia Institute of Technology

7 University of Michigan

8 Cornell University

9 Carnegie Mellon University

10 University of Texas at Austin