Start out with the stick, hose and the tape.
The stick should be about a yard or meter in length.
The hose should be about 2 to 2 1/2 feet long.
The surfaces of the hose and the stick should be clean so that the tape will adhere to them.
Wipe the hose with an acetone moistened paper towel to remove any excessive wax or powder.
Remove loose traces of saw dust from the stick by sticking tape and then stripping it off again.
Toss this tape away.
| Attach one end of the
hose to the stick
with a two inch length of tape.
( Sticks used for wet service pumps should
be completely covered with the duct or gaffer's tape to keep the wood dry. )
| Lay the hose along the stick. Secure the
other end like you first did with the first
end. Grasp both ends of the hose and it a
mild stretch to ensure that it lies straight.
| Cover the portion of the stick between the
two bands that hold down the hose.
| Attach an inflated balloon to the other or
the inlet end of the pump hose.
Attach a smaller hose to the exhaust end of the pump and run the other end to a clear
water filled glass cup.
Look for bubbles comming out of the
submerged end of the hose.
Adjust the pressure of this valve by adding
or removing bands or wraps to "tune" it
just on the stopped side of threshold.
Operating the linear peristaltic air pump.
Tape the experiment end of the stick down to the far edge of the table from where you are
standing or sitting.
After connecting an experiment or a gage to the end of the pump, take a brayer in each hand.
Place a brayer close to the experiment end of the hose, press down firmly and draw the brayer
towards your the check valve end of the hose. Before running the first, place the second brayer in the starting position and do the same while you complete rolling the first brayer over the check valve
| The original linear peristaltic pump devised
by Nyle Steiner did not have a check valve.
You had to be careful not to lift one
brayer before applying the other. Doing so
would allow the air that was removed to
immediately rush back into the experiment.
This new design is forgiving to less than perfect operation.
The check valve prevents the air from returning into the pump and the attached
experiment when both brayers are lifted off the
Be sure that you run the brayer firmly over
the valve to squeeze out the remaing air.
Another view of my setup.
| Expect more changes to these pages as I
get more pictures, information and maybe
a movie of the pump operation.
So far this page work has been mostly a
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