Samson 3767 - Adjusting the Proportional Band Xp and Air Delivery Q

EB 8355-2 EN 5-15
Installation
while making sure that the value on the
scale matches the valve's direction of ro-
tation.
Securing the aligned cam disk
To prevent the cam disk from turning, drill a
hole into the adapter (4) or coupling (11) to
allowa2mmdowelpintobeinserted.
Select one of the four holes located around
the center hole of the cam disk to secure the
cam disk in position.
Double-acting, springless rotary actuator with reversing amplier
Linear cam disk (equal percentage cam disk is represented by a broken and dotted line)
Viewfromthepositionerontotheactuatorshaft
Control valve opens counterclockwise – Based on a closed valve
Operating direction increasing/increasing >> Operating direction increasing/decreasing <>
Set point Signal pressure Valve
Charac-
teristic
increases
A1 increases, A2
decreases
opens
N
Set point Signal pressure Valve
Charac-
teristic
decreases
A1 increases, A2
decreases
opens
I
90˚
60˚
30˚
0˚
90˚
60˚
30˚
0˚
Feeler roll
Starting point N
Starting point I
Hole to secure the cam disk
Insertclipandpresstheaps
outwards
Viewfromthepositionerontotheactuatorshaft
Control valve opens counterclockwise – Based on a closed valve
Operating direction increasing/increasing >> Operating direction increasing/decreasing <>
Set point Signal pressure Valve
Charac-
teristic
increases
A1 increases, A2
decreases
opens
N
Set point Signal pressure Valve
Charac-
teristic
decreases
A1 increases, A2
decreases
opens
I
0˚
90˚
60˚
30˚
0˚
90˚
60˚
30˚
Feeler roll
Starting point N
Starting point I
Fig.5-9: Cam disk settings for double-acting actuators