- Видео 11
- Просмотров 111 132
OXYL8 Ltd
Добавлен 15 окт 2016
OXYL8 are the lead Local Exhaust Ventilation (LEV) Training providers for the BOHS Proficiency and Competency training courses and qualifications in the UK such as P601 "LEV Examination and Testing", P602 "LEV Design Principles", P603 "CoSHH PPE" and P604 "LEV Performance Evaluation & Management. We also present the OHTA W201 training course, "Basic Principles in Occupational Hygiene".
Our training website oxyl8.com not only provides a host of details about our course with dates and venues but also has a very active News feed/blog area (with useful downloads). OXYL8 supports delegates throughout their training programme with additional guidance materials targeted at the course topics and these can also be downloaded from our website.
As part of our training support programme this channel hosts a range of introductory videos on the subject of Local Exhaust Ventilation (LEV). Topics to be covered will include "The Pitot Tube", "Fan Laws", "Proportional Balancing" etc
Our training website oxyl8.com not only provides a host of details about our course with dates and venues but also has a very active News feed/blog area (with useful downloads). OXYL8 supports delegates throughout their training programme with additional guidance materials targeted at the course topics and these can also be downloaded from our website.
As part of our training support programme this channel hosts a range of introductory videos on the subject of Local Exhaust Ventilation (LEV). Topics to be covered will include "The Pitot Tube", "Fan Laws", "Proportional Balancing" etc
Видео
MicroFoggers - Preventing Ingress of Fog Fluid
Просмотров 133Год назад
How to remove and store a MicroFogger fog fluid tank and prevent fluid ingress which may short the PCB and prevent smoke operation.
MicroFoggers - Coil Electrical Contact Adjustment
Просмотров 132Год назад
How to adjust the coil electrical contact in a Vosentech Microfogger 2, 3 and 4
OXYL8 Basic Maths Video
Просмотров 376Год назад
Now for some Students it's been a wee while since school-day maths. If you are embarking on training for LEV (outside UK "Industrial Ventilation") and you are a bit rusty on basic maths - then help is at hand. This short intro video will take you through the basics of LEV maths. We do also have a pdf to support this video - just ask for a copy (but - do be aware though that this chanel is check...
How to Measure Captor Hood Effective Range (Captor Control Distance) - OXYL8 Captor 102
Просмотров 5 тыс.7 лет назад
How to Measure the Effective Range (Captor Distance) for Hoods such as Welding Hoods? Is the standard Smoke Test sufficient? Should we use Fletcher's Equations? Are there potentially misleading results using smoke alone? Please email your thoughts to bill@oxyl8.com For more video clips, and especially to view Captor 101, visit our website at oxyl8.com
Fans in Reverse
Просмотров 21 тыс.7 лет назад
What happens when a Centrifugal Fan (3 phase) is wired so that it runs in the opposite direction to normal (ie in Reverse)? It has been estimated that around 7% of all centrifugal fans are running in Reverse! How can that possibly be? Wouldn't it be opposite that it was running in Reverse? Ahh! See this video for some possible explanations. Brought to you by OXYL8 (see websites www.oxyl8.com fo...
How To Use a Pitot Tube
Просмотров 76 тыс.8 лет назад
How To Use the Pitot Tube instructional video discusses the Pitot and its connections, how to decide on duct test insertion points and how to connect the Pitot to obtain Static (Sp) and Velocity (Vp) Pressures. Do provide feedback and suggestions for any other LEV related video clips you would like to see on this channel. Contact via www.oxyl8.com
Explained in a very simple, nice and easy manner. Easy to understand. Thank you
How can i turn ON the Charge lock? It activate via the control cable while it is charging. Thank you for the tutorial
Amazing demostration.
useful video I understand the Pitot tube, but we are looking for briefing note for more information as you mentioned in your video.
can this unit be used to measure cfm air movement in a vacuum or compressed air tube of 1/2 inch ID diameter?
nice explanation. Thanks. Further I have few query n my mind. What will be the effect on static pressure and total pressure if their is damaged in duct line and addition air infiltrating into the duct apart from the design please.
Welldone
What's the point of fumehood if it will just spread the gas into the lab?
That's clean gas brother.
I don't think it's workin right mate
How do I measure this on a large air handling unit fan with a large duct? Where my pitot tube can't even reach the middle of the duct because the cross sectional area is so large?
Ah! Then you need a big Pitot. You can purchase Pitots up to 3m long to my knowledge.
Well explained. Thank you, sir!
Sir we know V = ✓2gh where h equals to velocity pressure and volume equals to area of duct x velocity . Now how do you find V= 1.29✓velocity pressure . Somewhere I find V= 1096.7✓velocity pressure ÷ density where density is 1.23 lb/ cu ft air at barometric pressure 29.45 hg column and atmosphere temp is 460 + 75 °f . . Pl text how do u find 1.29 ?
Sir what is 1.29 and how this no you find ? Pl share .
Sorry - I do not monitor this question log - but here is your (very) late answer. The full formula is (for metric conversions only) - V (velocity) = SQRT(Vp/0.5p) where p = air density. But in most cases we use Pitots in duct at around 20C where the air density is 1.2Kg/m3. If we put that figure into the main equation we could reduce it/simplify it to V=1.29SQRT(Vp) ...... but ONLY if the air in the duct is around 20C - otherwise you need to use the full equation.
Thank you so much for your great video
Well explained Sir. Thank you!
Thanks a lot.
How should I interpret the Negative Static pressure you measure? To get Total Pressure do I add the negative static pressure value to the Velocity Pressure? Or do in use the absolute value of the measured (and negative) static press (ie treat it as a positive value)?
Very well explained sir
Can you please share the pdf
Dang. I've listened to a ton of people and watched as many youtube videos. You sir, have hit the nail on the head. I am now confident and ready to work. Thank you.
Very well explained
Sir, you have an amazing pedagogical gift. Great tutorial.
Thank you
Amazing video! Finally understood how to correctly use a pitot tube and feel confident enough to conduct my testing! Thank you so much, everything well explained, it all makes sense now!
Great video on Pitot and Velocity measurements!
Very well explained! Thanks.
Was this a forward blades fan?
Why readings are minus ..?
Great video, thank you, you made it simple and clear.
❤️
Thanks
Super helpful. thank you mister
So you kept saying it was accurate from 90 to 70? Where is the accuracy?
Thank you for making this video. Dyslexia would dictate that if the fan moved in the opposite direction, the air movement would flow in the opposite direction...which obviously isn’t the case. As you said, the inlet will draw air in, in either direction, but it will only push that air out efficiently in the correct direction. Having an example of this for people to watch is great. Thanks again!
Thanks, You are a very good lecturer
Thanks, gave me the basics so I can build my own pitot tube to measure the airflow in my dust collection system. Now I just need to figure how to make and calibrate a manometer.
I do not recommend using a pitot in dust collecting units. Small holes in the pitot tube can become blocked.
@@aykutgurkan7008 Thanks for the tip. If you have a suggestion of a better way to make and use cheap/free home made sensors and instruments to gauge the performance of a dust collection system in a hobby work shop, I'm most definitely interested. Actually though, the big worry is that a big chunk of something will get sucked through one of the blast gates, rattle down the duct and smash the pitot tube, or get hung up on the pitot, clogging the duct, which is why I rejected...blah blah 3d printed impeller...encoder from an old mouse...blah blah Arduino...display....wires...code..of some sort inside the duct. All I really care about is relative performance so a water column and some marks on the wall showing how much vacuum I can pull when the filter is clean and the system is working is maybe a slightly better system than "Huh, the dust hood for the miter saw isn't working all that well today....maybe I ought to dump the dust bin"
How is the fan power consumption affected by reverse operation?... excellent video by the way 👍
Almost same Amps if backward inclined fan
Astandingfanspinninginnanti clockwisedirection how do i hey it Togo click wise
HOW MUCH CFM IS IT ON FULL SPEED
Thank you for the tutorial. I'm a NEBOSH Diploma student and have exam questions on LEV systems and transport velocity. Really helpful.
LOVE the tunes! Oh and learned about Pitot!!
Sir by rotating in reverse direction what will be the outlet velocity increases or decteses
Nice to see Geovent arms at work. And the intro music ... Me likey.
This might be a stupid question, because I'm not a welder, but are there fumes created during welding that are heavier than the rising smoke? I don't understand why the hood is not placed above the welding area instead of to the side.
So that they do not obscure the welder's view or get in the way. You don't want to place them above the welder's head also, because then you couldn't capture the fume before it's inhaled by the welder. Also hoods work more effectively if you place them near a surface. Like shown on this video but maybe a little closer.
rule of thumb is that you should always be pulling dirty air away from the breath zone ,not towards or passed it .
Salute you Sir for the knowledge you provide here. Very useful.
Anybody know how the 1.29 constant was derived?
that's the weight of Air
@@matreyasouthgate2184 that is the density of air.....
thank you so much super stuff
Very good!
Thank you a lot for this amazing helpful video, but I have a question,How I can measure the airflow for a compressed air system using this device to check the compressor efficiency ?
Hi Ahmad. Difficulty would be getting the instrument into the pipe and yet maintaining a seal. Not sure it can work in your application? Regards, Bill
What’s the name of the device on the wall that reverses rotation?
Sorry Janik - has taken some time to get back to you. The device you refer to is an Inverter. This company shows and describes Inverters for many application requirements: acdcdrives.co.uk/index.php?route=product/search&search=inverters