PICV Explained - Pressure Independent Control Valves
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- Опубліковано 1 сер 2024
- PICV Pressure Independent Control Valves, in this video we learn how PICV's work, where we use PICV's, what they look like, the basic working principles behind them to help you learn mechanical engineering.
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🎁 Check out Danfoss PICVs and matching 3D BIM library for modern MEP HVAC designs: bit.ly/DanfossPICV
Danfoss is engineering HVAC 4.0 for smart buildings:
With its dynamic hydronic balancing and high-accuracy control performance in partial load conditions, Danfoss PICVs improve indoor comfort in public and commercial buildings. At the same time, they increase the energy-efficiency of HVAC systems, so they perform with the lowest possible operational costs.
Equipped with NovoCon series digital actuators, detailed HVAC system data is made available for Active Energy Management (AEM) by BACnet or Modbus connected Building Management Systems (BMS).
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What is the difference between PICV and DRV
I don't have a need to use picvs but I really enjoy the breakdown on how things work and why...very informative mate..ty so much
We started swapping out all our delta style valves to these Danfoss valves. Thanks for the explanation.
Excellent animations to show the workings. In the process of designing a system with a heat exchanger, I had planned to use a proportional valve to control the fluid flow. Great to find out now that this is a better valve selection! Thanks again for the awesome video. Will be ordering one of these on Monday.
I love your videos. I actually use them to teach part of my Plumbing class hydraulic flow. Thank you for making my life easier.
Thanks for sharing our content
Very well explained & graphics are amazing. Keep up the good work. Thank you.
No easiest video on UA-cam , great ways of explanation,
Very simple and informative, thanks mate!
Wow... Well explained... Good animation and analogies along with examples!
Thank you.. Please keep them coming!!
Good explanations. Very didactic. Congrats!
Great, now I finally got it. Keep the good work ;)
Thanx for sharing.we learn too much from your videos.good luck master
Thank you and very nice video to explain PICV🎉
Great job Paul keep it up, please make a vedio on btu meter which is use to generate the bill, include the whole formula to get kwh or mwh, also show it's installation and input parameters
Great work. Can you please upload more tutorials of Industrial Electrical Installation? DOL starting method of motors, Motor controls, SPD . etc
Awesome stuff thank you!
Keep up making these contents, I love you work
Thank you!
Great video! 🤯
Great stuff!!
I hope you know how invaluable your videos are.
Glad you like them!
Great vid, thanks a lot.
Great video very well explained
Amazing water animation
Outstanding !!
Thank you!
Thanks
Great work. Good explanations and supporting animations.
Time permitting I want to add to the knowledge by doing some building services videos on a new channel. More on installation and opening the electronic equipment. It will be more of an exploration to understand a bit more.
Beautiful
Thanks
Good information
Awesome.
Thanks alot
Nice explanation
Very Good.
Keep It Up.
Please add info on the blue and red measuring pipes, and how you use them. I love your videos :)
Look at a HVAC pressure manifold.
clear explanation (y)
Awesome & useful video
Glad you enjoyed
Excellent. But working and internal construction is almost same as PCV. Good job. Please keep us educating.
Very nice video
What if downstream pressure keeps changing? Still this valve will give constant flow?
If not, which valve used for that?
I thought of something similar to use for ragulating pneumatic supplies.
Good tool for HVAC
Good
Nice video, with what looks like a typo at the end (varaible) :)
Please tell about working principle of BALANCING VALVE & DIFFERENTIAL PRESSURE CONTROLLERS (Individuals )BV+DPC
Why should follow PIBCV installed return pipe?
Hi there, can I use this unit to control the balance in my water pressure in my home ?
Thank You.
Very niece
Thanks Paul The Engineering Mindset much appreciated from South Africa
Can you do something on VFD/VSD and Circuit breakers
Glad to hear, yes VFD very very soon! I'll tag you when live
VFD Video is now live! here: ua-cam.com/video/yEPe7RDtkgo/v-deo.html
Seen our new incredibly detailed MCB video? link: ua-cam.com/video/gqEu9t8HwW0/v-deo.html
Working on a system at the moment. 2 chillers on primary side linked to secondary system through a de-coupler. Max flow on primary chillers in 250 m3/h in total.On the secondary side there are variable speed pumps.
I need to ensure a max flow of 240m3/h on secondary side. Just wondering should i replace the 200mm DRV with a similar size PICV To ensure I don't pull no more than 240 m3/h.
Sir please do a video about VRV System and how they works , vrv maintenance and its application
Check this video ua-cam.com/video/xwvkojKiLJM/v-deo.html
You said that PICVs don't work when combined with TRVs in two-pipe heating systems, but what about a TRV which is also a PICV? Danfoss (Dynamic Valve) and IMI Heimeier (Eclipse) both have such valves, are they suitable for two-pipe heating systems?
Hello
The channel is very helpful. But there were two questions about this video.
Why, when changing the position of the shutter when adjusting the position in the animation at the moment starting from 10.10, the shutter movement is not shown? during regulation, the pressure drop across the valve changes. And secondly, I did not understand how these valves help the chiller work in case of partial load when a low temperature difference occurs - reducing the flow does not help the chiller.
Please produce, building fire fighting systems videos as per NFPA
So, in EE analog... It's like a current source (as opposed to voltage source)?
Can a balancing valve be used on the hot water supply on the distributor with 2 heating circuits?
I've wired 100s of those up and didn't know about spring for the DP.
Glad you found it useful
yeah exactly same haha
That's why there is a minimum and maximum differential pressure requirement.
Can a standard 2 port control valve be installed downstream of a PICV (no actuator on the PICV)? How does the modulating control of the 2 port control valve affect the operation of the PICV. Do they work against each other i.e when the 2 port control valve closes, does the PICV compensate to keep the flow constant?
this also requires that the spring stiffness to remain constant or a predictable value, but springs wear over time i feel it will loose its stiffness, so how long do these things last?
On an average 8 to 10 years if maintained properly
Besides being a single valve body, do these function differently than using a modulating control valve in combination with an automatic flow control valve?
In automatic balancing valve the flow is fixed, but here you get a range of flow for each valve size which can be adjusted as per requirement.
Hi, Very nice video.
Can you please let me know how it will avoid overflow in part load operation when PICV is used in constant speed pump.
Pls explain as I didn't get that point.
When the system is in part load, that means some branches of pipework are closed off or at low flow. That causes the pressure of the system to increase. When this higher pressure water enters the PICV, it will cause the diaphragm to restrict the flow of water going to the outlet, making sure that the flowrate of water going to the outlet is constant.
@@jamesch770 Thanks
Hi, may I ask that our AHU is having 5 l/s flow rate and PİCV selection is made as per 6 l/s .. will this PICV work properly?
@@ibrahimhalil7391 i believe shown in the video that flowrate can be adjusted
How does a Posi-Temp shower valve work
9:57 Varaible -> Variable
Dear The Engineering Mindsets at 5:42 you've said pressure increases then flow rate increases then velocity increases . Isn't pressure and velocity inversely proportional ? . Then how come pressure and velocity increases at same time . Kindly clear my doubt and please tell me I'm right or wrong .
I too have same doubt regarding this content . Can you tell me the reason ? @the engineering mindset
Seems like a great retrofit on a monoflow T but its not a T so not so much
🙏🙏
Sir,
How can we use PIVC for larger pipe size .
It comes up to 250 mm size and in bigger sizes 65 mm and above it has flanged end connection
Hello, I study electric engineering in college in Russia, you are making amazing videos, let's create Russian subchannel, I could translate.
What is an air hnalding unit?
Completely off topic - just a question I've had a long time, & didn't find topic. My question is about attenuators , or light dimmers. When you use a household light dimmer in you home to set mood, at night, let's say, and you dim you light to a faint glow - I know the light bulb itself [filament] is not burning energy, & you're not paying for electricity like if that bulb were straight-on at full brightness. My question is about that dimmer, & it's process... Am I still using the same amount of electricity - with the dimmed output process still using the same amount of juice as the dimmer's resistance deflects energy from the bulb? Does the dimmer chock the electric output, block it, or consume it? Thanks - Brad
Basically the dimmer gets rid of the unwanted electrical true heat there copper winding in the dimmer switch
5:11 One or two "L", make your choice
Three, take it or leave it.
@@bjarnivalur6330 You got a deal sir!
is there any disadvantage about PICV?
Are you talking about pilot valves?
The way this thing looks, would backwash i guess, like turbulent flow, circulation within the PICV be a problem??? From what little I know, those fluid dynamics consideration would be a problem I think....and also lets say the pressure increases on the high pressure side, the goal is to maintain constant flow not constant pressure on the low pressure side right? But intuitivetlyIt seems like inevitably that the pressure will increase no matter what to make the fluid flow rate the same, for example in electricity, the resistance increases, but to maintain the same amount of current i.e. fluid flow, the pressure or (voltage) must also increase to maintain the same amount of current or flow rate? Its hard to imagine the same flow rate without a fluctuation in pressure as well.....someone please comment on all of this...
valve open or close, when we off the machine
This is the same as air compressor pressure regulator?
Not quite
Thanks bro
Humidifier dehumidifier explain videos pls send
It doesn’t sense temperature difference tho
The last 3 minutes confused me as I didn't properly understand the drawing
First
Fast, well done
please comment in Hindi bro.
Is it a kind of double regulating valve? If no, what's the main difference?
It also does controlling and dynamic balancing