Diagram of the Rotary Valve (a typical German rotary valve with clock spring and pin stop)
Left: top view: first valve with pin stop, second valve operated, third valve not operated
Right: section
a = valve casing
b = rotor
c = valve loop with slide
d = main tubing
e = port
f = touch piece
g = spring box with coiled clock spring inside
h = gear
i = articulated crank
k = push rod
l = rotor spindle or shaft bearing
m = pin stop
n = stop cork
o = valve cap
p = reciprocal driver pivot
q = screw to hold rotor in place
See also photograph of a rotary valve
© the authors, 2005.
This page updated 5.1.05