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Discussions about Duct Sizing Chart
  • Re: Derating Factors for Cable

    Sir, The cable size has to be large enough so the heat losses into the surrounding soil do not heat the cable beyond the temperature the insulation is rated for. Knowing the configuration of adjacent ducts in the cable bank and the temperature rating of the insulation are both essential. Keep searc...

  • Re: cable ampacity

    Hi Not to confuse at all, but there is more to just looking up on a table for the current carrying capacity of a cable. in any chart you look up there will be some standard specifications linked to the value. IE, depth of cable, or on a rack or in the air or in a duct, How many cables run together,...

  • Re: cable sizing calculation

    To size the current you should refer the relevant bs,is or IEC standards. Alternatively from cable manufacturer tables(ducab or polycab or oman) one can calculate the current but several factors have to be taken into consideration 1. cables being laid in air,duct or buried ground.

  • Re: Static Pressure for Exhaust fan

    helo iam sivabalasubramanian working for ISRO-GOVT OF INDIA IAM A HVACE ENGINEER ANSWER you have not mentioned the unit for static pressure i presume it is = inchs SWG Please refer to the friction chart for ducts availble in ASHRAE handbook or design dat...

  • Re: Static Pressure

    You can also find static pressure drop of a duct given the duct size, volume of air flow (cfm) and velocity. You can also use a chart or an engineering design tool called a ductculator. For a given size of duct, lets say for example 24"x12" in a HVAC application. Industry standard of supply air flow...

  • Re: Flase Floor.Measurement of air leakage.Testing Procedures.

    It is used in places, where a large amount -mostly electronic - equipment is packed together in rows of racks or cabinet, like internet hubs, server farms, large computing centers, supercomputers. You get the idea. Such equipment generally is positively aircooled: individual fans or blowers force...

News about Duct Sizing Chart
  • Battery-Powered Duct Slitter Has 1- to 5-in. Cutting Range

    The Cordless Duct Slitters from General Machine can longitudinally slit long sections of duct with an inner duct cutting range of 1 to 5 in. for SDR 9 and higher. Serial numbers for the duct slitters are 70427, 70546, 70547, and 70548. Certain models can cut both longitudinal and orbital slits in duct. Cutting depth is adjustable and converting to another size is easy with the conversion plates. Unloaded, the blade spins at 1400 rpm. The 12-V lithium battery for the duct slitter is rechargeable up to 12.5 Watt-hours with a charging time of 1 hour. read more

  • Min Separation Between 25kv Power and LV Control Cable

    Whats the min separation needs to be maintained when LV control cables will cross perpendicularly on top of power cables which are (25 kv power cables) inside concrete duct. power cables are running east west direction inside concrete duct and top of concrete duct to top of ground (before placing in

  • Why China still can't create the next Texas Instruments

    Will China ever create an enterprise comparable in size, creativity and impact to Texas Instruments?View the full article HERE. Originally from EETimes:

  • Enhancing Natural Gas Burning in Tandoor

    In many Asian countries especially India/Pakistan we have Tandoors ..structures dug into earth for you can say baking puproses Above Tandoor usually employ an air duct running from ground to the bottom (~1.5m depth) to enhance air flow towards burning coal/wood. This duct is closed/open manually

  • Space Heating Load

    This program calculates the maximum heating load required in a space (single zone) so that a furnace can be sized.? Heat transfer coefficients are built in for many types of wall, floors, doors, windows, etc.? Custom values can also be used. The heat needed for infiltration & humidity control are also calculated. Final furnace sizes are tabulated with several values of efficiency.

Product Announcements for Duct Sizing Chart
Gurley Precision Instruments
GURLEY Cobb Sizing Testers

GENUINE GURLEYTM Cobb Sizing Testers have been manufactured by Gurley for over a half-century and represent an economical and practical means of determining liquid absorptiveness or resilience of treated and untreated papers, boards, fabrics and other sheet materials. The complete kit consists of the Gurley-Cobb test apparatus, its 10-kg roller and a supply of blotting paper. The roller method is recommended to insure better consistency and reliability that can be obtained by manual blotting...

ITT Compact Automation
Online Configuration and Sizing Tools

Our online Configurators, can help you to find the correct product for your specific application needs. Simply supply the inputs to your application, select and compare available models and contact us to finalize your selection. Available for the following products: - Compact Inch Cylinders. - Compact Metric Cylinders. - Gate Valve Actuators. Click here for the Configurator and E-Catalog Selection. Compact Automation belongs to the ITT family of companies. With a dedicated focus on techinical...

Fritsch GmbH - Milling and Sizing
Laser Scattering: perfect for particle sizing

The FRITSCH Laser Particle Sizers ANALYSETTE 22 are used around the world in production and quality control as well as in research and development for precise determination of particle sizes. Benefit from its decisive advantages: extremely simple operation, short analysis times and consistently reproducible and reliable results. And of course getting the best value for your money. Your advantages with the ANALYSETTE 22 models:   Measuring range 0.01 – 2000 μm.   Short...