Page 1
Optional Remote Control
Modem
Modem
Computer
131-01
Control Valve
Signal Transmitter
4-20 mA
SERIES
131VC
Electronic Control Systems
• Electronic Control of Hydraulic
Cla-Val Valves
• Programmable Monitoring and
Control of Flow, Pressure, Delta P,
Level or Valve Position
• Accurate Control of Valve Speed and
Response
• Remote Set-Point Control
• Security System - Prevents
Unauthorized Changes
• Control Backup Systems in the
Event of an Emergency
Electronic Control of Hydraulic Valves
The 131VC-1 Electronic Control System is designed to work in
conjunction with Cla-Val 131 Series hydraulic control valves—
a combination that takes advantage of the simplicity of
hydraulic valve operation and the control possibilities available
with electronics.
The 131VC-1 Electronic Control System receives transmitted
signals and activates dual solenoid pilots on the hydraulic control valve. These pilots direct hydraulic pressure within the system to position and regulate the valve. By continuously comparing system conditions to the programmed set-point, the system is automatically maintained at the desired value.
Additional important control features, unique to this type of
valve control, are offered as standard. They are designed for
user friendly operation and system safety and are addressed in
this brochure.
The Cla-Val 131VC-1 Electronic Control System is
designed to achieve unprecedented valve control
accuracy and stability. Ideal for remote valve control,
the 131VC-1 Electronic Control System provides the
interface between SCADA system computers and
hydraulic control valves sites.
Key Advantages
• Proven reliable hydraulic control valve
• Low electric power requirement
• Solid state electronic components
• No motors, bearings, bushings or packings to
wear out or leak
We Not Only Sell Valves—
We Provide Solutions
Page 2
How it Works
131-01 Valve
Transmitter
Dead
Band
Set-Point Command
131-01 Valve
Transmitter
Transmitter
Feedback
Signal
Deviation
Transmitter
131-01 Valve
Devitation
Transmitte
Feedback
Signal
1. Set-Point Command
Set-point command is received from a
remote location or entered via the key
pad into the Electronic Valve Controller.
2. Feedback and Comparison
The Electronic Valve Controller compares
the feedback signal from the transmitter
to the set-point. If the deviation exceeds
the deadband, the valve control system is
activated.
3. Valve Actuation
The Electronic Valve Controller actuates the solenoid controls, causing the
valve to modulate as needed to regain
the set-point condition.
Keypad & Display
Display
The 131VC-1 has been engineered to be the industry’s most
user friendly controller. With three digital displays areas (two
offering up to 9 characters of true alphanumeric), the 131VC-1
effectively eliminates cryptic messages, sub-routines and loops
that could confuse even the most experienced operator. The
bright, crisp display is vacuum fluorescent, and offers much
better readability than any other display technology. Additional
operator-friendly features include: custom programmable
alarm messages, illuminated keys, and an easy-to-use menu
system.
Status Indicators - Four status indicators show the controller’s
operating status at all times:
Manual Key Light: For manual control.
Set-point Key Light: For indication of remote control.
Output Indicator: “OUT” and indicator lights illuminate
when either output 1 or 2 are on.
Alarm Indicator: “ALM” and indicator lights illuminate
when either output 1 or 2 are on.
Keys Pads: All menu entry, configuration, tuning and set-point
controls is entered through rugged backlit rubber keys. A simple
menu system prompts the operator, step by step, through all
procedures. Security system prevents unauthorized changes to
all values.
Page 3
Features
U
L
®
Alarm - Programmed to signal when system conditions exceed a desired
value or in the event of a system component failure. It can be configured
to be latching or non-latching, normally open or normally closed contact
with deadbands.
Absolute Alarm - Activates when the process variable exceeds
alarm set-point. It can be either high and/or low acting.
Deviation Alarm - Shifts as the set-point is changed. It can be
symmetrical or asymmetrical.
Fault Alarm - Activates when the process variable is lost.
Specifications
Control Input:
4-20 mA full scale (others optional)
Control Parameters
Proportional Bands: 1 to 999%, settable in 0.1%
increments independently for opening and closing
Deadbands: achievable up to 15% of input range
Cycle Time: 1 to 120 seconds in 1 sec. increments.
Set-Point Rate of Change - Prevents accidental or sudden changes in
the programmed set-point. It is also invaluable when used on high differential
or surge sensitive applications where valve speed of operation must be
tightly controlled.
Process Variable Backup - Can automatically recognize secondary
process variable or can be programmed to open or close valve or can
default to backup pilot system using alarm function.
DC Power Supply - Provides source of power for signal transmitter.
Retransmission - Transmit process variable or set-point values.
Offsets - Adjusts the process variable and remote set point settings if
respective signals do not match.
Filter - Stabilizes process variable signal when required.
Security System - Prevents unauthorized changes.
Input Linearization - For flow measurement across orifices, venturies, etc.
Digital Inputs - Selects specific set-points. (optional)
NEMA 4X Enclosure (optional)
Environmental Parameters
Temperature: 0°C to 50°C (32°F to 1 22°F)
Humidity: 10 to 90%, non-condensing
Power Consumption
15 watts Max. at 120 VA, 50160 Hz
Voltage and Frequency
Universal power supply: 90 to 250 VAC, 48 to 62 Hz.
24 to 30 volts AC or DC, +/- 5%.
Noise Immunity
Common mode rejection (process input): >120 db.
Normal mode rejection (process input): >80 db.
AC line is double filtered and transient protected.
Snubbers are provided for each relay output.
Construction
Case: extruded, non-perforated black anodized
aluminum with ABS plastic sleeve.
Black plastic ABS.
Bezel:
Chassis assembly: plug-in type.
Keys: Silicone rubber with diffusion printed graphics.
NEMA rating:
instrument is properly installed.
front panel conforms to NEMA 4X when
Input Signals
The 131VC-1 Electronic Control System is designed to accept
industry standard 4-20 mA full scale signals for pressure, flow or
level control from customer supplied transmitter(s).
Flow Measurement using a differential signal requires activating
the square root extractor to obtain direct flow readout.
Modulating Level Control requires the use of an optional X117
Valve Position Transmitter in addition to a level transmitter.
Valve Position Control requires an optional X117 Valve Position
Transmitter installed on the valve.
Other configurations are available on a special order basis, consult
the factory for details.
Agency Approvals
LISTED
LR 84603
Process Control Equipment
4N66
Memory Retention
Lithium battery maintains all programming for approximately
ten years.
Security
There are two levels of access: restricted and full. A
configurable code is used to enter the full access level.
Functions not available in the restricted level are configurable.
Page 4
How To Order
Order
Output 1: Control Code
Mechanical Relay (5 amp)
A
nalog (milliamp)
Solid State Relay (triac) (1 amp)
Output 2: Control, Alarm, or Retran
Mechanical Relay (5 amp)
A
nalog (milliamp)
Solid State Relay (triac) (1 amp)
Output 3: Control, Alarm, Retran
Mechanical Relay (5 amp)
A
nalog (milliamp)
Solid State Relay (
Loop Power
tr
iac) (1 amp)
smissi
smission,
on
or Loop Power
131VC -1
1
2
3
1
2
3
1
2
3
5
33
0
V
C
Output 4: Alarm, Retran
Mechanical Relay (0.5 amp, 24 V)
A
nalog (milliamp)
Solid State Relay (triac) (0.5 amp, 24 V)
Loop Power
Option
s
Enter Ò0Ó if not desired
24 VAC/24 VDC Operatio
Remote Setpoint
Set of Five Digital Inputs
Certification
Five Digit
al Inputs and Certification
smission,
n
or Loop Power
1
2
3
5
F
B
D
H
J
Page 5
VALVE RESPONSE TIME
DEVIATION BAND DEVIATION BAND
Faster
Slower
Higher
Lower
Dead
Band
VALVE SENSITIVITY
SET-POINT
SOLENOID
CYCLE TIME
Feature in blue
are user programmable
PROPORTIONAL
OUTPUT CIRCUIT NO.2
PROPORTIONAL
OUTPUT CIRCUIT NO.1
Valve Solenoid
"On" Time
SOLENOID
CYCLE TIME
100%
75%
50%
25%
0%
Programmable Control Features
Full Programmable Control of Valve Sensitivity and Valve
Response
Designed with duplex output circuits (one to control the valve
opening solenoid and one to control the valve closing solenoid ).
The 131VC-1 Electronic Control System can be programmed to
maintain precise control of any process. Each output circuit has
an independently programmable proportional band and solenoid
cycle time. By adjusting these control algorithms in combination, the response time can be varied over a wide range.
Proportional Band
The proportional band can be programmed from 1 to 999 percent of transmitter scale. Programming a narrow deviation band
will result in faster valve response, whereas a wider band will
result in slower response.
Proportional Response Time
The response time of the valve is proportional to how far the
process variable is from the set-point. If there is only a small
deviation, the solenoid “on-time” will be short and the valve will
move slowly. For large deviations, the “on-time” will be longer
and the valve speed will be faster.
Solenoid Cycle Time
The opening and closing solenoid pilots operate in “on-off”
cycles. The cycle time is programmable to allow the valve to
make a smooth transition to the set-point and avoid overshooting.
Dual Output Circuits
The two output circuits can be programmed independently to
respond at different rates. For example: fast response above
the set-point; slow response below the set-point.
Set-Point Rate of Change
The controller has a ramping function that will further control
valve speed of operation. This feature is especially useful in
applications where valve speed is critical and pipeline surges
are possible. When turned on, the set-point rate of change
feature is operational under the following conditions:
On power up, the set-point will ramp from the process
variable value to the set-point value at a specified rate.
On a transfer from manual to automatic control, the setpoint will ramp from the process variable to the set-point
value at a specified rate.
On any set-point change, the set-point will ramp from the
current set-point to the new target set-point.
Page 6
131-01 Valve
Pressure
Transmitter
Position Transmitter
131-01 Valve
131-01 Valve
Level
Transmitter
Position Transmitter
Flow
Transmitter
131-01 Valve
Applications
Pressure Control
Downstream pressure control is easily accomplished. The pressure 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 adjustment 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 minimum of five to nine diameters downstream of the valve.
Modulating Level Control
For modulating level control, the controller accepts the signal
from the tank level transmitter as the remote set-point. This signal is then compared with the signal generated by an optional
X117 Valve Position Transmitter to adjust the valve proportionally to the range of the level transmitter.
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 programmable controller (PLC) may receive inputs from other sensors
and output a position command signal for use in complex control
applications.
Page 7
AC
POWER
131-01 Valve
AC
POWER
AC
Power
AUX
Power
131-01 Valve
AC
POWER
Power Failure Options
POWER
SUPPLY
DC
POWER
Maintain Valve Position
When there is a power failure, using the standard Model 131-01
Control Valve, the pilot control solenoids lock in the closed
position and hold the main valve in the last control position.
Open or Close Valve
Adds a third solenoid control to the pilot system which either opens
or closes the main valve on power failure.
Transmitter Signal Failure
The 131VC-1 Electronic Control System contains several indispensible sub-routines that protect the system if there is a transmitter signal failure. The controller has, as standard, terminals for
a second transmitter and can be configured to automatically
default to that transmitter. The controller can also be configured
to cause the valve to remain in last control position, to open or
close at an electronically controlled rate, or alarm to an auxiliary
hydraulic pilot system.
Direct Voltage Electronic Control
Customer supplied battery power, with a continuous charging
system, operates the valve solenoids and controller in the event
of power failure.
Hydraulic Backup
A second hydraulic pilot system is arranged in parallel with the
electronic system. On power failure, a third solenoid switches
the control from electronic to the backup hydraulic system. The
hydraulic system will then modulate the valve to maintain preset system conditions. Virtually any hydraulic system can be
used.
Remote Communications Failure
The 131VC-1 Electronic Control System is the final link in the
communications system at the valve site. In the event of a failure, the controller will continues to function, maintaining the
valve at the last set-point command or a pre-programmed setpoint. It can also have a new set-point entered on the key pad
by the Operator.
Page 8
Installation
C
The electrical power used to energize the solenoid pilot system on the
valve is routed through the 131VC-1 Electronic Control System.
Because of practical limitations on wire size and distance, we recommend locating the controller near the valve itself.
Retrofitting CLA-VAL Control Valves
Transmitter signals of 4-20 mA can travel great distances without difficulty, therefore, the controller does not need to be near the signal transmitter. For outdoor and high humidity indoor applications, we recommend
installation in water-tight NEMA 4 enclosures.
Existing hydraulically operated Cla-Val control valves can easily be converted to operate with the 131VC-1 Electronic Control System. The valve
is modified by simply adding the Series 131 Solenoid Pilot System. The
Series 131 Pilot System can be installed in parallel with the existing
hydraulic pilot control for backup control in case of electrical power failure. In this case, the hydraulic pilot system must be isolated from the
valve by a third solenoid valve (see Power Failure Options above).
Purchase Specifications
The Electronic Control System shall provide the interface between a
remote computer system and the control valve. The controlled parameter signal shall be accepted through a 4-20 mA feedback signal. Local
manual set-point control and full manual control of control valve solenoids is to be provided on the controller panel for local control.
Upon receiving the set-point command signal from the remote computer
system, the controller will signal the valve to move and maintain the
valve at the desired set-point. A vacuum fluorescent display of current
status and set-point value in scalable engineering units shall be supplied.
The controller shall compare set-point and feedback values and adjust
the valve accordingly to achieve the set-point. When the feedback signal deviates from the set-point value, the appropriate opening or closing
solenoid on the control valve shall activate. As the feedback signal
approaches the set-point, the solenoid output will pulse on and off to
gradually return the measurement to set-point. One solid-state relay
energizes for measurements condition below the set-point, while the
other energizes for measurement, greater than set-point. These outputs
shall be wired directly to or through intermediate relays to the opening
and closing solenoids on the control valve. Solenoid output indicator
lights shall illuminate when either the open or closed solenoid is activated.
The total cycle time between each pulse shall be programmable
between 1 and 120 seconds. The duration of each pulse shall be directly proportional to the deviation from set-point outside of an adjustable
deadband. The time proportioned outputs shall be independently
adjustable for conditions above and below the set-point to properly tune
valve response. The time proportional output band width shall be independently programmable between 1 and 999 percent of full scale. When
the feedback signal returns within the deadband zone, the valve will
maintain position. Provision shall be made to open/close/maintain position in the event of a loss of the feedback signal.
When the existing Cla-Val control valve performs a combination of
control functions (such as pressure reducing and pressure sustaining),
the 131VC-1 Electronic Control System will control the primary function
of the valve. The other secondary functions will continue to be controlled
by the hydraulic pilot controls. Consult Factory for details.
The operator interface shall consist of two rows of alphanumeric characters to display numeric values and units. Color coded alarm, status and
mode indicators shall inform the operator of operating conditions.
Security key codes shall protect against undesired changes to the controller. All programming shall be menu driven.
The controller shall be all solid-state construction with the internal chassis capable of being removed for inspection and adjustment. All program
memory, including set-points and tuning parameters, shall be protected
by an internal lithium battery rated for 10 year life.
Remote communications shall be accepted through a 4-20 mA DC analog set-point signal.When remote operation is selected, the controller
shall monitor the remote set-point signal. When local control is selected,
the set-point shall be changed at the controller keypad.
The Electronic Control System shall be the Cla-Val Model 131VC-1 as
manufactured by Cla-Val, Newport Beach, CA.
E-131VC-1 (R-1/2013)
LA-VAL
PO Box 1325 Newport Beach CA 92659-0325
Phone: 949-722-4800 Fax: 949-548-5441
CLA-VAL CANADA CLA-VAL EUROPE
4687 Christie Drive
Beamsville, Ontario
Canada L0R 1B4
Phone: 905-563-4963
Fax: 905-563-4040
©COPYRIGHT CLA-VAL 2013 Printed in USA
Specifications subject to change without notice.
Chemin dés Mesanges 1
CH-1032 Romanel/
Lausanne, Switzerland
Phone: 41-21-643-15-55
Fax: 41-21-643-15-50
www.cla-val.com
Represented By:
Loading...