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What makes pressure regulators so restrictive??

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chris smith

06-07-2003 18:52:15




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I noticed on my new emglo portable compressor something interesting. I got the one with the control panel. Basically a manifold with two couplers, a regulator and two gauges. I noticed with like a blow gun, even with the regulator fully open, the gauge on the regulated side always dropped 5-10 psi where as the other gauge moved gradually. To solve this there was a plug on the tank side of the manifold. After finally finding my 3/8" drive allen bits and my impact to remove the plug(yes it was that tight!!) I put a new coupler on the tank side and no more pressure drops, i get full pressure and flow.. So the regulator is nice for nailers, but for air motors and blow guns they are two restrictive. Why couldn't the manafactures put a coupler on tha tank side?// Now my question, What makes ruglators so restrictive?? How many of you run regulators?//

Thanks guys!! chris..

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JDK

06-08-2003 14:32:42




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 Re: What makes pressure regulators so restrictive? in reply to chris smith, 06-07-2003 18:52:15  
Besides being required by law in some instances,for safety reasons,such as limited flow in some types of air guns,They also prevent damage or injury caused by "overpowering" air motors and overpresurizing chambers in pneumatic tools,which could result in catastropic failure of tool and injury to operator.Also without them air consumption in thru systems such as sandblasting increases,where a tool requires say 9.5 cfm at 80lb,you could be running much more air thru it increasing air consumption,compressor and tool wear while not increasing tool performance any signifigant amount.Looking at it like your car,it would be relatively simple to run a car engine at say 3600rpm constantly,and drive the drivetrain by hydraulic(hydrostatic)motors with variable restrictor valves.But it would be highly inefficient to operate such a system(at peak power)in stop and go traffic,low load conditions,downhill driving etc.A power system needs to be matched to the job it performs and perform it safely,hence the restriction/regulators,popoffs.I finally discovered after many yrs that the avg guy can seldom outguess the professional engineers/technicians and safety folks miilions of hrs of research and experience.Everything is there for a reason,not just to irritate the consumer/end user....lol

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rustyfarmall

06-07-2003 20:13:17




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 Re: What makes pressure regulators so restrictive? in reply to chris smith, 06-07-2003 18:52:15  
All power tools must meet OSHA requirements, that is why it was set-up the way it was, I have a vertical tank compressor, with one outlet from the tank. I installed a TEE fitting on this outlet, one side of the TEE goes to the regulator, the other side I set up with a female coupler, and can plug a hose directly into it for full pressure.



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Chester

06-08-2003 12:28:06




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 Re: Re: What makes pressure regulators so restrict in reply to rustyfarmall, 06-07-2003 20:13:17  
If you look closely at those regulators, you'll see that there is a fair amount of restriction built into them. The inner valve that regulates the flow usually goes right through the orifice, thus restricting it, for a given pipe size. Using my paint gun I use a 1/2" NPT regulator (on 1/4" piping) at the compressor to overcome this shortcoming. Also have that "T" in place to give unregulated pressure, for other uses.

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