To help you better understand how a typical RL
Flo-Master sprayer works, and the differences between the various models you
will find in the store, we've
provided the following drawing and description.
How It Works
If you're not very familiar with a pressurized sprayer,
here's how it works:
1) Unscrew the combination carrying/pump handle from the top
of the tank by twisting the handle in a counter-clockwise direction.
2) Pour in a measured amount of the chemical you plan to
use, then add the appropriate amount of water to dilute the mixture according
to the chemical manufacturer's instructions.
3) Screw the handle/pump assembly back into the top of the
sprayer in a clockwise direction, ensuring a snug fit.
4) Turn the pump handle enough so that it unseats from its
stops and then pump the handle up and down to pressurize the tank.
Approximately 20-30 strokes is normally sufficient to provide good spraying
pressure.
5) Reseat the pump handle and you're ready to spray!
In the spraying process, depress the handle on the flow
control to release spray. Pressure in the sprayer forces the diluted mixture
up the siphon tube, through the hose and flow control, and out of the
adjustable nozzle.
Design Features
(Refer to drawing above for part names)
Tank: Originally steel, most
modern sprayers have a tank of high-density, polyethylene. This material
is tough, non-corrosive, light-weight, and is usually translucent, so you
can readily see the level of fluid you're adding to the sprayer.
Flow-Control (Shut-Off): Most
RL Flo-Master sprayers feature a corrosion-resistant poly flow control, which
has an ergonomically designed handle and grip, and a lock-on feature
for extended spraying. Certain models will have a heavy-duty brass flow
control, also with a lock-on feature.
Sprayer Top: Higher-end
sprayers typically have a funnel top for ease of filling and pouring out
left-over fluid; lower-cost sprayers have a straight neck.
Adjustable Spray Nozzle: Sprays
a cone-shaped pattern which can be adjusted from a fine mist to a solid stream
to reach high into trees or large bushes.
Pressure Relief Valve: Releases
excess tank pressure if over-pumped; also useful to release pressure when
you're done spraying. Found only on certain models.
Carrying Strap: Typically found
on 3 gallon capacity sprayers and on some, higher-end 2 gallon models.
Carrying/Pump Handle: Features
the "Comfort Grip" design for ease of use and carrying, and wand
storage slots to hold the extension wand/hose assembly in place while in
storage.
Pump: The pump and integrated handle create air
pressure inside the tank, which forces fluid out through the siphon tube and
to the flow control.
Reinforced Hose:
Heavy-duty, reinforced hose for long life. Screw-on tank connector simplifies
assembly and maintenance of sprayer.
Anatomy of a Sprayer 
