Go to GlobalSpec.com Home
Newsletter   FREE GlobalSpec e-Newsletters
Receive the latest news, trends, and technology relevant to your work.
(See Titles)

What is Anti-Static? Plus the Shocking Facts About Static in Liquids

From Newson Gale Inc.
 

 

It is sometimes suggested that an antistatic item is one that will not allow any "static (i.e. any electrostatic charge) to occur. The inference here being that it must, therefore, be safe to use in a potentially flammable atmosphere. As we will see, this is only part of the picture. The latest Cenelec report on static electricity (RO44-001) is discouraging the use of the word antistatic as it can be misleading. The preferred term is "static dissipative" ('electrostatic dissipative' or simply 'dissipative'). A dissipative object or material is defined as being "incapable of retaining a significant amount of electrostatic charge when in contact with earth . . . " In other words, the material allows the static electricity to dissipate through it down to earth. This more up-to-date term makes the principle much easier to understand and the definition clearly shows that it is a combination of the type of material AND its connection to earth which prevents the build up and possibly dangerous discharge of static electricity.


Products & Services
Intrinsic safety (IS) barriers are devices that limit the current, voltage, and total energy delivered to a sensor in a hazardous area or flammable environment in order to prevent an explosion. Search by Specification | Learn more about Intrinsic Safety Barriers
Specialty electrical distribution and protection products are specialty or proprietary products related to electrical distribution and circuit protection. Learn more about Specialty Electrical Distribution and Protection Products
Grounding indicators are used to monitor and verify the presence of grounding systems. Learn more about Grounding Indicators

Product Announcements
DieQua Corporation - EA - Counter Rotating Spiral Bevel Gearboxes
The Tandler EA series offers up to 4 shafts, in the same plane, with two shafts that counter rotate. (read more)
DieQua Corporation - STD - Spiral Bevel Gearboxes
The Tandler series of spiral bevel gearboxes offer low backlash operation with 14 ratios in 8 sizes. They are an excellent choice for applications requiring precise rotary motion, high speed, or heavy... (read more)
DieQua Corporation - S/AS - Reversing & De-Clutching Spiral Gearboxes
The Tandler S/AS series offers reversing and de-clutching capabilities through either manual or air actuation. (read more)
DieQua Corporation - HW - Shaft Mount Spiral Bevel Gearboxes
The Tandler shaft mount spiral bevel gearbox offers low backlash with hollow output shafts in keyway, spline, or smooth bore with shrink disk configurations. The widest range of ratios are available... (read more)
DieQua Corporation - CU - Helical Bevel Speed Reducers
The WATT Drive helical bevel reducer offers a unique offset input design for mounting the unit closer to the load than standard designs. Available with output shaft or hollow bore for shaft mounting. (read more)
DieQua Corporation - FU - Parallel Shaft Speed Reducers
The WATT Drive parallel shaft speed reducer offers shaft mounting with keyway or shrink disk and a modular housing for base or flange mounting. Standard input shaft, motor adapter, or integral motors... (read more)
DieQua Corporation - SU - Helical Worm Speed Reducers
The WATT Drive helical worm speed reducer offers higher efficiency than standard worm reducers. Input options include motor adapters, input shafts, or integral motors. Output shafts or hollow bores... (read more)
 

Topics of Interest
Operation manual ZA type series hydraulic power operated chucks... (Read More)
Two-row or double-row tapered roller bearings have increased radial load capacity compared to single-row bearings. They can also handle thrust loads from both directions. The rollers can be configured... (Read More)
The butterfly body typically involves one of two styles. The wafer body (sometimes called the flangeless body) is a flat body that has a minimal face-to-face, which is equal to double the required... (Read More)
Flanged End Connections Flanged valves are perhaps the most widely used. Flanges used to mate valves with adjacent piping and/or equipment must conform to the following: They must provide sufficient... (Read More)
5.2.2 Manual Operator Design Generally, manual operators are divided into two categories: linear motion and rotary motion. Linear-motion manual handwheels use a threaded connection between a... (Read More)