Heat exchange bypass valve regulator design

[Ucallus]

This is my heat exchange regulator unit hook to my screen and orfice. Incoming pressure is adjusted down. Via the needle valve adjusting the incoming pressure of 400psi to represent 100psi on the meter representing hot water bypassing to the waist tank in consistent flow passing through the weep cooling water. If my wand is set down to long my temputure can rise above 250. On my homemade bypass I've added a selinoide at 15$ and connected it to a temp sensor rated at 125. If my temp hits 125 the screen orifice bypasses all waters to the waist tank. This double flow valve allows me to set a consistent bleeding of water plus a flush system when not in action. Ive found a 125 thermo disk " open on rise", and most are close on rise" this cycles my flush system from 195 to 125 when the wand is in action and hope this idea is helpfull. To add more simple issues im adding a remote control door lock unlock fob remote - car system 15$- as my back up so while setting the wand down i hit my car fob and dump water in consistent flow or stop the direct flow. My needle valve adjusted to 100psi always allows a dribble. My selonoid allows alot more then that being direct from bypass screen and orfice. To further this im adding a 150 sensor on my water box that activates a car alam like a pager im wearing it sounds the alarm my water box hit 250, and further goal is to add an auto remote start and shut off for my 18hp engine so i can shut it down or start it up via the house. My concern was getting this 2nd hand machine the temp and pressure broke prior owners hoses, and yes the screen orifice idea is a solution, but can very job to job as to how much heat you need and how much you open the needle valve, as in my system you limit psi to 100psi and no more then 145 temp. to protect your selinoide.
Im not an english major but an electronics mechanical engineer

 

[mojoe77]

I'm impressed sir...im designing my own truckmount and love seeing other ideas on how to deal with heat exchangers and overheated water

 

[mrotto]

wow, Im impressed that you made your own bypass. Its kinda your *thing*. but few people here can do that.

But are you a carpet cleaner or a TM designer? I love it when *cleaners* spend so much time on their machine. I just buy a brand name TM where they have their own designers and I have no problem with the machine. That way I can spend time CLEANING, than working on the machine.

 

[sbsscn]

I like your idea, and nothing wrong but here is my own experience.
Ive done what you are doing. It works but, that solenoid will burn out depending on how hot your machine can get
if its a low heat-med no problem. Another thing is that YOU MUST maintain it regularly, you have to!
and third is that in my opinion you need to place a thermal control sensor at the exit prior to the female connector
or you'll be jumping around and getting a false reading.
also understand that youll need a dump bypass either to tank or if your pump seals can handle it to the water box, But I dont recommend the water box if you have a hot running machine or else youll be constantly overheating and cycling the solenoid bypass valve. I personally think that if you insulate your exhaust with a ceramic coating to cointain heat, wrap the exhaust system in header wrap, insulate your heat exchanger, lines and run a radiator fan from back of the machine towards front to keep components cool. Ive done so many mods on my old machine that I went over kill, It was Super hot, all stainless steel, including all pressure lines ( i recommend) header wrapped, used water heater blanket (fiber glass) or even better use Rock insulation, Foam, and foil reflector insulation, and had a pushing and puller fan one for front and rear of machine. I ended up replacing and tearing it down because my blower gave out and I had a crack on the water pump bracket so i figured its time to replace a15 year old machine, I ended up buying a spanking new ss saphire 370. I dont regret it.

 

[sbsscn]

one more thing
if you really want to mix then youll need 3 solenoids ( what I did)

1 solenoid going from cold psi from pump to mixing area
1 solenoid coming from heated water from heat exchanger to mixing area
1 solenoid (bypass) between heat exchanger and mixing area, to bring the temp down in case of overheating

I used this set up (had to) because my heating system was just insane. I also dumped any over heated water to my waste tank because I learned that 1 my water box would either overheat, and was just not large enough( capacity) and 2 my seals would not handle heat it was a cold inlet only type pump

and you must insulate to keep the cold mixing side line or else you heat it up and you wont mix the temp.

Now that was the plumbing

wait till you hear about the wiring

 

[sbsscn]

It seems that you dont have anything controlling the orifice ( in your case needle valve) , Not good in my opinion,
if anything id place a one way check valve, why? well as you know when you apply pressure to a liquid it can change its boiling point. if that bypass is going to the waste tank that orifice will only raise you temp and overheating can occur

I also dont see a bypass dump route. it seems that your set up is technically in a close loop, kind of pointless?
i see a incoming line, splits into 2 one goes o solenoid the other to needle valve, then they unite again, so how are you controlling the temperature?

Technically if your design is correct then you do not need the needle valve as an orifice. just use bigger plumbing to dump to your water or waste tank, that itself will allow a higher flow to bring your machine down.

 

[sbsscn]

wow, Im impressed that you made your own bypass. Its kinda your *thing*. but few people here can do that.

But are you a carpet cleaner or a TM designer? I love it when *cleaners* spend so much time on their machine. I just buy a brand name TM where they have their own designers and I have no problem with the machine. That way I can spend time CLEANING, than working on the machine.

Don't discourage the man, If he want to do mods that's great, I've actually given plenty of tech help to sapphire and TMI because there was some not good engineering done, yeah they dont like it but sucks for them.

I still have my old machine and i could sell it but im always thinking on way to improve.

You might be seeing the beginning of a new company being born. you never know