Cla-Val 131VC Series - Manual (Page 6)

131-01 Valve
Pressure
Transmitter
Position Transmitter
131-01 Valve
131-01 Valve
Level
Transmitter
Position Transmitter
Flow
Transmitter 131-01 Valve
Pressure Control
Downstream pressure control is easily accomplished. The pres-
sure transmitter range should be selected to provide the desired
accuracy of pressure control. The set-point of the controller can
be changed by the remote command signal or by manual adjust-
ment at the controller panel. For pressure sustaining control, the
transmitter is located upstream of the valve and the solenoid
outs are reversed.
Flow Control
Flow control uses a flow transmitter in the configuration shown.
The flow transmitter range should be selected to provide the
desired accuracy of flow control. If desired, the transmitter may
be located downstream of the valve, however, it should be a min-
imum of five to nine diameters downstream of the valve.
Position Control
For applications requiring control of valve position, use the
optional Cla-Val X117 Valve Position Transmitter. This provides
the feedback signal to the controller. A computer or program-
mable controller (PLC) may receive inputs from other sensors
and output a position command signal for use in complex control
applications.
Modulating Level Control
For modulating level control, the controller accepts the signal
from the tank level transmitter as the remote set-point. This sig-
nal is then compared with the signal generated by an optional
X117 Valve Position Transmitter to adjust the valve proportion-
ally to the range of the level transmitter.
Applications