Leslie Judson Jones
Member
- Joined
- May 12, 2007
- Messages
- 2,242
It has come to my attention that there are manufacturers selling truckmounts intentionally designed to produce temperatures higher than the pressure hose is rated for.
Goodyear Neptune hose is rated to 250 degrees. Parker Parflex is rated for 230 degrees. Even though these temperature ratings are at full pressure rating capability of the hose, dropping the pressure does not in any way increase the temperature rating of the hoses.
The reason I am making this post, is that I need everyone to be aware that to compensate for temperature drop through the pressure hose by simply adding more temperature as the water leaves the machine, is not the best method and is not safe.
In other words, if you have a unit with 280 at the machine because you want to have a temp at the wand of 240, you are taking a HUGE liability risk!
The pressure hose manufacturers put those temperature limitations on the hose for a reason. If after extensive testing and research, they determine that 230 is the max safe operating temperature for that hose, then you had better NOT intentionally operate that hose at 231 degrees or higher.
I am not making this post as a scare tactic, but to inform you if one of your customers gets injured from a pressure hose rupture, you will lose in court when you get sued, if you are intentionally operating your equipment in such a manner as to produce temperatures higher than the pressure hose is rated for.
Another down side to running your heat system at such high temperatures is that you are wasting energy. You are forcing everything to run at higher temperatures, which shortens the life of your components. It also shortens the life of the hose dramatically.
There is a simple way to get you the 240 at the wand without having to run high temps at the machine and overtemp the hoses. Purchase a 10 Flow Greenhorn Wand from Greenie. This will allow you to run your machine at no more than 250. Because of the high flow the water travels faster from the machine to the wand, and your heat loss through the hose is only 10 degrees instead of 30 – 40 degrees with a standard flow wand.
Another good thing about Greenie’s wand is that you can now run your machine at a lower temperature, saving big money on propane or kerosene, extending the life of your truckmount, plus extending the life of your pressure hose.
I have one more subject I would like to talk to you guys about. It has come to my attention that truckmount manufacturers are producing truckmounts with vacuum settings higher than the maximum rating for the blower.
The purpose of doing this is to get more airflow through the vacuum hose. By having a higher lift on the blower, you are loading the engine more, causing it to run at higher temperatures, consume more fuel, and shorten its life. This will also cause you to have to replace belts more often.
Again, I don’t want to sound like a big schill for Greenie, but if you will simply go to 2 ½ inch vacuum hose, you will increase the airflow probably more than if you just had the vacuum relief valve set higher than the blower’s maximum capability. This will put less stress on your equipment, make everything last longer, and lower your operating cost.
I know we all want to get the most out of our units to do the best job we can. However, there is a correct way of doing things and there is an incorrect way. Exceeding the manufacturers’ limitations of their components is the incorrect way of achieving higher performance.
I am going to post two videos of a system we built with Terje. You will see that it has 240 at the wand and the machine is not set over 250. I know a lot of you guys are going to say that you have been doing this for years and getting away with it. That’s not the point. I don’t want to see any of you wind up in a law suit or needlessly wear out your equipment prematurely.
Thanks!
Les
v]http://www.youtube.com/watch?v=eSgk5Azwx0gv]
v]http://www.youtube.com/watch?v=PfsZ9nNPTgcv]
Goodyear Neptune hose is rated to 250 degrees. Parker Parflex is rated for 230 degrees. Even though these temperature ratings are at full pressure rating capability of the hose, dropping the pressure does not in any way increase the temperature rating of the hoses.
The reason I am making this post, is that I need everyone to be aware that to compensate for temperature drop through the pressure hose by simply adding more temperature as the water leaves the machine, is not the best method and is not safe.
In other words, if you have a unit with 280 at the machine because you want to have a temp at the wand of 240, you are taking a HUGE liability risk!
The pressure hose manufacturers put those temperature limitations on the hose for a reason. If after extensive testing and research, they determine that 230 is the max safe operating temperature for that hose, then you had better NOT intentionally operate that hose at 231 degrees or higher.
I am not making this post as a scare tactic, but to inform you if one of your customers gets injured from a pressure hose rupture, you will lose in court when you get sued, if you are intentionally operating your equipment in such a manner as to produce temperatures higher than the pressure hose is rated for.
Another down side to running your heat system at such high temperatures is that you are wasting energy. You are forcing everything to run at higher temperatures, which shortens the life of your components. It also shortens the life of the hose dramatically.
There is a simple way to get you the 240 at the wand without having to run high temps at the machine and overtemp the hoses. Purchase a 10 Flow Greenhorn Wand from Greenie. This will allow you to run your machine at no more than 250. Because of the high flow the water travels faster from the machine to the wand, and your heat loss through the hose is only 10 degrees instead of 30 – 40 degrees with a standard flow wand.
Another good thing about Greenie’s wand is that you can now run your machine at a lower temperature, saving big money on propane or kerosene, extending the life of your truckmount, plus extending the life of your pressure hose.
I have one more subject I would like to talk to you guys about. It has come to my attention that truckmount manufacturers are producing truckmounts with vacuum settings higher than the maximum rating for the blower.
The purpose of doing this is to get more airflow through the vacuum hose. By having a higher lift on the blower, you are loading the engine more, causing it to run at higher temperatures, consume more fuel, and shorten its life. This will also cause you to have to replace belts more often.
Again, I don’t want to sound like a big schill for Greenie, but if you will simply go to 2 ½ inch vacuum hose, you will increase the airflow probably more than if you just had the vacuum relief valve set higher than the blower’s maximum capability. This will put less stress on your equipment, make everything last longer, and lower your operating cost.
I know we all want to get the most out of our units to do the best job we can. However, there is a correct way of doing things and there is an incorrect way. Exceeding the manufacturers’ limitations of their components is the incorrect way of achieving higher performance.
I am going to post two videos of a system we built with Terje. You will see that it has 240 at the wand and the machine is not set over 250. I know a lot of you guys are going to say that you have been doing this for years and getting away with it. That’s not the point. I don’t want to see any of you wind up in a law suit or needlessly wear out your equipment prematurely.
Thanks!
Les
v]http://www.youtube.com/watch?v=eSgk5Azwx0gv]
v]http://www.youtube.com/watch?v=PfsZ9nNPTgcv]
