GW Technical Services Inc.

Product Safety Certification Consulting

Technical Writing

 

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NOTICE:  The area below is under continuing development.  Material is added regularly.

PRESSURE WASHER REFERENCE AREA

Disclaimer

All information presented comes from reliable sources and is believed to be correct.  However, no responsibility can be accepted for any errors or omissions.  If you will use information from this site for important, critical, or safety-related purposes, double check it!  Note that modification of a machine can void its warranty and/or safety certification.  For example, simply installing an inappropriate spray nozzle can result in a motor overload.  

Water Systems  (files are pdf format)

Spray nozzle charts, 1000-4000 psi
compact chart  (pressure in 500 psi steps)
medium chart  (pressure in 200 psi steps)
large chart  (pressure in 100 psi steps)
maxi-chart  (flow in 0.1 gpm steps)

Spray nozzle chart, 4000-5000 psi
chart  (pressure in 100 psi steps)

Spray nozzle formulas
gpm, nozzle number, psi

Spray angle coverage
chart and formulas

Pressure loss through hose and pipe
charts

Water pressure loss due to height
chart and formula

Pump relationships
formulas

Horsepower charts, 1000-4000 psi
compact chart  (pressure in 500 psi steps)
medium chart  (pressure in 200 psi steps)
large chart  (pressure in 100 psi steps)
maxi-chart  (flow in 0.1 gpm steps)

Horsepower chart, 4000-5000 psi
chart  (pressure in 100 psi steps)

Horsepower formulas
(see Pressure Washer University section)

Impact force and reaction force
chart and formula

Reaction force and torque for bent wands
formulas

Properties of water
charts for boiling points of water
physical properties of water  

 

 

 

 

 

 

 

 

    

 

 

Conversion Factors and Formulas  (files are pdf format)

Conversion factor charts
pressure
flow rate
units of measure  (length, area, volume, force/weight)
energy and power  

 

Conversion formulas
temperature

Oil-Fired  (files are pdf format)

Oil nozzle chart  (pressure in 5 psi steps)  

Heat of combustion
low-resolution graph
high-resolution graph (large file)

Fuel Facts

Heating values for fuel oil
chart (large file)

Altitude correction factors   

Natural Gas-Fired  (files are pdf format)

Pipe sizing chart

Burner orifice chart

LP Gas-Fired  (files are pdf format)

Pipe sizing charts
Burner orifice chart

Vaporization rate chart
Vapor pressure chart

Mechanical Information  (files are pdf format)

Pipe dimensions chart

Pipe thread data chart

Electrical Information  (files are pdf format)

Electrical enclosures (except motors)
NEMA enclosure ratings chart
NEMA-IEC enclosure cross-reference chart

Motor enclosures
NEMA traditional designations chart
NEMA/IEC IP codes explanation and charts

 Voltage drop for extension cords chart

 

High Pressure  (files are pdf format)

Spray nozzle charts  (5000-20,000 psi, 500 psi steps)

 

Miscellaneous Information  (files are pdf format)

2006 "squares" calendar (13-month), 8½x11 sheets for planning

2007 "squares" calendar (13-month), 8½x11 sheets for planning

  Project scheduling chart

 

 

 

PRESSURE WASHER UNIVERSITY

Pressure Washer University is a collection of write-ups, each of which explains an aspect of pressure washer design, installation, service, or use.

Horsepower formulas  

Heating relationships

Choosing and using extension cords