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Thread: Pressure Washing How-To's

  1. #21
    Ron Musgraves
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    Re: Pressure Washing How-To's

    [quote author=pldoolittle link=topic=6447.msg111426#msg111426 date=1244739275]
    [url=http://www.ptstate.com/index.php/topic,8309.msg111424.html#msg111424]How to improve the performance of your surface cleaner[/quote]
    [/quote]Great Info, nice work.

  2. #22
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    Re: Pressure Washing How-To's

    Downstreaming defined........

    A venturi is simply a restriction in the injector that forces the water to speed up when it goes through it. The faster the water goes through, the more detergent/chemical comes out. This is called "venturi vacuum" and is greatest at fastest water flow.

    When pressurized water enters the injector inlet, it is constricted toward the injection chamber and changes into a high-velocity jet stream. The increase in velocity through the injection chamber results in a decrease in pressure, thereby enabling an additive material to be drawn through the suction port and entrained into the water stream. As the jet stream is diffused toward the injector outlet, its velocity is reduced and it is reconverted into pressure energy (but at a pressure lower than injector inlet pressure).

    When a sufficient pressure difference exists between the inlet and outlet ports of the injector, a vacuum is created inside the injector body, which initiates suction of a liquid through the suction port.

    This "effect" can only be achieved when you use a tip that allows the pressure at the outlet to be less than that at the injector inlet. This is why you need to use the larger, less restrictive tips to "draw" soap into the stream.

    Everything beyond your downstream injector, becomes a potential for restriction. The proper trigger guns, length of hose and tips all play a part in the outcome of the "draw" rate.

    Here is a simple image I did to try and demonstrate.


    [attachment deleted by admin]
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  3. #23
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    Re: Pressure Washing How-To's

    Wow, great job Mike, have you been hanging out with Doolittle?

  4. #24
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    Re: Pressure Washing How-To's

    Pressure Washing Nozzle Chart

    Nozzle size Orifice Diameter 40 PSI 100 PSI 250 PSI 500 PSI 600 PSI 700 PSI 800 PSI 1000 PSI 1200 PSI 1500 PSI 2000 PSI 2500 PSI 3000 PSI 3500 PSI 4000 PSI 5000 PSI
    2.0 0.034 0.20 0.32 0.50 0.71 0.77 0.84 0.89 1.00 1.10 1.22 1.41 1.58 1.73 1.87 2.00 2.40
    2.25 ? 0.23 0.36 0.56 0.80 0.87 0.94 1.01 1.13 1.23 1.38 1.59 1.78 1.95 2.10 2.25 2.52
    2.5 0.039 0.25 0.40 0.63 0.88 0.97 1.05 1.12 1.25 1.37 1.53 1.77 1.98 2.17 2.34 2.50 2.80
    2.75 ? 0.28 0.44 0.69 0.97 1.07 1.15 1.23 1.38 1.51 1.68 1.94 2.17 2.38 2.57 2.75 3.07
    3.0 0.043 0.30 0.47 0.75 1.06 1.16 1.25 1.34 1.50 1.64 1.84 2.12 2.37 2.60 2.81 3.00 3.35
    3.25 ? 0.33 0.51 0.81 1.15 1.26 1.36 1.45 1.63 1.78 1.99 2.30 2.57 2.81 3.04 3.25 3.63
    3.5 0.048 0.35 0.55 0.88 1.24 1.36 1.46 1.57 1.75 1.92 2.14 2.47 2.77 3.03 3.27 3.50 3.91
    4.0 0.052 0.40 0.63 1.00 1.41 1.55 1.67 1.79 2.00 2.19 2.45 2.83 3.16 3.46 3.74 4.00 4.47
    4.5 0.055 0.45 0.71 1.13 1.59 1.74 1.88 2.01 2.25 2.46 2.76 3.18 3.56 3.90 4.21 4.50 5.03
    5.0 0.057 0.50 0.79 1.25 1.77 1.94 2.09 2.24 2.50 2.74 3.06 3.54 3.95 4.33 4.68 5.00 5.59
    5.5 0.060 0.55 0.87 1.38 1.94 2.13 2.30 2.46 2.75 3.01 3.37 3.89 4.35 4.76 5.14 5.50 6.15
    6.0 0.062 0.60 0.95 1.50 2.12 2.32 2.51 2.68 3.00 3.29 3.67 4.24 4.74 5.20 5.61 6.00 6.71
    6.5 0.064 0.65 1.03 1.63 2.30 2.52 2.72 2.91 3.25 3.56 3.98 4.60 5.14 5.63 6.08 6.50 7.27
    7.0 0.067 0.70 1.11 1.75 2.47 2.71 2.93 3.13 3.50 3.83 4.29 4.95 5.53 6.06 6.55 7.00 7.83
    7.5 0.070 0.75 1.19 1.88 2.65 2.90 3.14 3.35 3.75 4.11 4.59 5.30 5.93 6.50 7.02 7.50 8.39
    8.0 0.072 0.80 1.26 2.00 2.83 3.10 3.35 3.58 4.00 4.38 4.90 5.66 6.32 6.93 7.48 8.00 8.94
    8.5 0.074 0.85 1.34 2.13 3.01 3.29 3.56 3.80 4.25 4.66 5.21 6.01 6.72 7.36 7.95 8.50 9.50
    9.0 0.076 0.90 1.42 2.25 3.18 3.49 3.76 4.02 4.50 4.93 5.51 6.36 7.12 7.79 8.42 9.00 10.06
    9.5 0.078 0.95 1.50 2.38 3.36 3.68 3.97 4.25 4.75 5.20 5.82 6.72 7.51 8.23 8.89 9.50 10.62
    10.0 0.080 1.00 1.58 2.50 3.54 3.87 4.18 4.47 5.00 5.48 6.12 7.07 7.91 8.66 9.35 10.00 11.18
    11.0 0.083 1.10 1.74 2.75 3.89 4.26 4.60 4.92 5.50 6.02 6.74 7.78 8.70 9.53 10.29 11.00 12.30
    12.0 0.087 1.20 1.90 3.00 4.24 4.65 5.02 5.37 6.00 6.57 7.35 8.49 9.49 10.39 11.22 12.00 13.42
    12.5 0.089 1.25 1.98 3.13 4.42 4.84 5.23 5.59 6.25 6.85 7.65 8.84 9.88 10.83 11.69 12.50 13.98
    13.0 0.091 1.30 2.06 3.25 4.60 5.03 5.44 5.81 6.50 7.12 7.96 9.19 10.28 11.26 12.16 13.00 14.53
    14.0 0.093 1.40 2.21 3.50 4.95 5.42 5.86 6.26 7.00 7.67 8.57 9.90 11.07 12.12 13.10 14.00 15.65
    15.0 0.096 1.50 2.37 3.75 5.30 5.81 6.27 6.71 7.50 8.22 9.19 10.61 11.86 12.99 14.03 15.00 16.77
    20.0 0.109 2.00 3.16 5.00 7.07 7.75 8.37 8.94 10.00 10.95 12.25 14.14 15.81 17.32 18.71 20.00 22.36
    25.0 0.125 2.50 3.95 6.25 8.84 9.68 10.46 11.18 12.50 13.69 15.31 17.68 19.76 21.65 23.39 25.00 27.95
    30.0 0.141 3.00 4.74 7.50 10.61 11.62 12.55 13.42 15.00 16.43 18.37 21.21 23.72 25.98 28.06 30.00 33.54
    40.0 0.156 4.00 6.32 10.00 14.14 15.49 16.73 17.89 20.00 21.91 24.49 28.28 31.62 34.64 37.42 40.00 44.72
    50.0 0.172 5.00 7.91 12.50 17.68 19.36 20.92 22.36 25.00 27.39 30.62 35.36 39.53 43.30 46.77 50.00 55.90
    60.0 0.188 6.00 9.49 15.00 21.21 23.24 25.10 26.83 30.00 32.86 36.74 42.43 47.43 51.96 56.12 60.00 67.08

    Data from: Pressure Washer Nozzle Chart
    "If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms. Crouch down and lick the hand that feeds you; and may posterity forget that ye were our countrymen." -
    Samuel Adams

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    Re: Pressure Washing How-To's

    "If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms. Crouch down and lick the hand that feeds you; and may posterity forget that ye were our countrymen." -
    Samuel Adams

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    "If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms. Crouch down and lick the hand that feeds you; and may posterity forget that ye were our countrymen." -
    Samuel Adams

  7. #27
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    engine size equation

    Bruce Stanley
    Stanley Pressure Wash Service LLC.
    256-335-2164
    stanleyklean@yahoo.com
    Florence, AL

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    "If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms. Crouch down and lick the hand that feeds you; and may posterity forget that ye were our countrymen." -
    Samuel Adams

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    Re: Pressure Washing How-To's

    Here's a great one that got left out of this thread;

    6 Must read books for entrepeneurs
    "If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms. Crouch down and lick the hand that feeds you; and may posterity forget that ye were our countrymen." -
    Samuel Adams

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    Re: Pressure Washing How-To's

    "If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms. Crouch down and lick the hand that feeds you; and may posterity forget that ye were our countrymen." -
    Samuel Adams

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