[dvldoc]

I won't bother naming said vendor but his claims are pure bunk and not backed up with facts.

His claim
[quote]Our pumps are all Shurflo pumps, designed by the company to put out a maximum pressure. Other companies will buy the cheaper Shurflo pumps, and then increase their output to as much as 200 psi. This is not what the cheaper pumps were designed for, and will lead to early failure.

There is no set psi of any of the pumps. This was bad info everyone was going with in the past now here's what you need to know.

Fact 1, The max output pressure on all these pumps is around 60psi open flow and that is dependent on hose size the smaller the higher it is.

It is the hose size and nozzle restriction that causes higher output pressures seen on a gauge. So if your running a open hose the pressure switch will never be effected the pump will just run. If you have a restiction such as a nozzle that is under the set pressure it will never be effected.


Fact 2. The pressure switch on the top of the pump has jack didly squat to do with max pressure. It increases the pressure switches turn off point in 5psi increments give or take a few psi. The pressure switch simple turns the pump off at the pre-set point. By raising this you allow higher psi output and less pulsing.

Here's the break down on the pressure switches
The pressure switches have a differential on off point of 15 to 18psi.
so a un-molested 100psi pump will cut off at 100psi and turn back on at 85psi.

Fact 3. All the 8000 series pumps have a internal thearmal overload switch if the pump reaches a certain temp it will shut off and not come back on until it has cooled. Do not bypass the factory pressure switch on the pump if your running it for more than 45 minutes non stop. It heats up the switch and can runnin it. This little factoid only really effects turbo disel guys. They just turn the adjustment bolt on the pump 7 times clockwise and it will give you the maximum pressure differential of the pump and the demand switch


Fact 4. Bypass modle pumps run at almost the same PSI as all others. The only difference is they have a few extra componets internally. A spring and a few screws and that's it.


Fact 5. 150psi pumps have a slightly larger motor due to the new 8mm bearing they have. So they are a bit more rugged and physically larger. We find them a bit bulky for most applications where space is a issue.

So bottom line all these pumps put out around the same max pressure. Psi output of the pump is a direct result of the size of nozzle restriction is in place. The pressure switch simply shuts the pump on and off when it hits that set pressure it has nothing to do with max output of the pump. All pressure switches can be adjusted and are designed to do so.

Myths about the pressure switch, changing them causes premature wear on the pump.

If you have ever looked at replacing the internals of the pump you will notice all the pumps have the same part number for the diaphram. That goes for all 8000 series pumps. There is little to no difference in the internals of the pumps period.

Here's the facts. SAME MOTOR, check valve Assembly,Upper Housing,
Bypass/ NonBypass Valve Assembly,Diaphragm Assembly,Drive Assembly and here's the big one SAME MOTOR on all 8000 model numbers wheather they are 60psi or 100psi.
150psi pump (longer body)


Don't take our word on it check for yourself
http://www.jfoakes.com/Shurflo8000PartsList.htm


Valve repair kit 94-390-08


Diaphram repair kit


Pump housing


Drive assembly repair kit
94-385-32

http://www.windsun.com/PDF/8000-443-236-kits.pdf

ALL THE SAME PARTS




8000 seriers guts. Notice on the left you can get a pump with a plate to totaly bypass the pressure switch which will run the pump at around 200psi dependent on nozzle size of course. So if adjusting the switch causes damage to the pump, why can it be purchased without out it on any model and run it at 200psi with no pressure cutoff.





And the finally the parts list of the internalls as you can see 90% of the parts are shared the only real difference is the pumps that have the 1.8GPH housings vs the 1.2GPH housing and 60psi and 100psi motors.

Here's a few more facts the 150psi pump the 8030-813-239 motor is part number 11-227-000 the one we use is the 11-111-00. The 8030 is the newes of the Shurflo pumps. Let's just get the differences out in the open. The only differnences is they switched to a 8mm bearing vs the bushing that are used on the 8000 series pumps. The 150psi pump motor is physicaly longer because of the bearings all the other parts are identicle. Now since we know the facts I would like to hear a explaination of their claims. Hmm lets see I've never had to replace a pump motor go bad in 2 years. Anyone on the forum please step up if you ever had a pump fail.

Here are our kits and pumps outputs with nozzles.
M2 nozzle with 1/8 ID hose 200+psi
M3 nozzle with 1/8 ID hose 180 psi
M5 nozzle with 1/8 ID hose 160 psi
M10 nozzle with 1/8 ID hose 130 psi
M14 nozzle with 1/8 ID hose 120 psi


http://www.jfoakes.com/Shurflo8000PartsList.htm

Let's clear up there Progressive Controller claim (once again)
His claim

Be cautious using a Progressive Controller. Here is a direct quote from the patent that Shurflo operates under for the 8000 series pump, the most commonly used Water Injection pump:

"If the voltage level provided to the pump by the battery becomes too low, the pump may stall at pressures less than the shut-off pressure. Moreover, when the pump stalls at pressures less than the shut-off pressure, current is still being provided to the pump's motor even through the motor is unable to turn. If the current provided to the pump's motor becomes too high, the components of the pump's motor can be damaged."

Let's think about this for a second. A major company designes a PWM controller patents it produces and sells it and it causes damage to the motors. That makes a ton of sense.

This is what he conveniently leaves out of the patent statement.

In light of the problems and limitations described above, a need exists for a pump apparatus and method employing a diaphragm that is easy to manufacture and is reliable (whether having integral pistons or otherwise). A need also exists for a pump having an outlet port that is positioned for improved fluid flow from the pump outlet port. Furthermore, a need further exists for a pump control system designed to better control the power provided to the pump, to provide for quiet operation of the pump, and to prevent voltage surges, voltage drops, and excessive currents from damaging the pump. Each embodiment of the present invention achieves one or more of these results.


The pump control system can also include an input power stage designed to be coupled to a battery. The microcontroller is coupled to the input power stage in order to sense the voltage level of the battery. If the battery voltage is above a high threshold (e.g., when the battery is being charged), the microcontroller preferably prevents power from being provided to the pump. If the battery voltage is below a low threshold (e.g., when the voltage available from the battery will allow the pump to stall below the shut-off pressure), the microcontroller preferably also prevents power from being provided to the pump. In some preferred embodiments, the microprocessor only generates a control signal if the sensed battery voltage is less than the high threshold and greater than the low threshold.

Preferably, the pump control system is also capable of adjusting the pump's shut-off pressure based upon the sensed battery voltage in order to prevent the pump from stalling when the battery is not fully charged. The microprocessor compares the sensed pressure to the adjusted shut-off pressure. If the sensed pressure is less than the adjusted shut-off pressure, the microprocessor generates a high control signal so that the output power stage provides power to the pump. If the sensed pressure is greater than the adjusted shut-off pressure, the microprocessor generates a low control signal so that the output power stage does not provide power to the pump.

In some preferred embodiments, the pump control system is further capable of limiting the current provided to the pump in order to prevent high currents from damaging the pump's components. The pump control system is capable of adjusting a current limit threshold based upon the sensed pressure of the fluid within the pump. The pump control system can include a current-sensing circuit capable of sensing the current being provided to the pump. If the sensed current is less than the current limit threshold, the microcontroller preferably generates a high control signal so that the output power stage provides power to the pump. If the sensed current is greater than the current limit threshold, the microcontroller preferably generates a low control signal until the sensed current is less than the current limit threshold.

For the method of the invention, the microcontroller preferably senses the voltage level of the battery and determines whether the voltage level is between a high threshold and a low threshold. Preferably, the microcontroller only allows the pump to operate if the voltage level of the battery is between the high threshold and the low threshold. The microprocessor adjusts the shut-off pressure for the pump based on the sensed voltage.

Our controller does all of the above. Also note you have a altenator on your vehicle. The statement he uses only applies when running a pump directly off the battery with no other power source like on a RV when it is parked.

http://www.patentstorm.us/patents/6623245.html

Please back up claims with facts. Don't leave out important info and give all the information and sources.

Here is our pumps psi output with nozzles.

[pacemkr86]

just keep up the great work at Devils Own

[loeb50]

Anyone that takes the time to look at this awesome web site and all the positive posts would be out of their mind to purchase any other product on the market!!!!!!!!!!!
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