Cla-Val 393-01/3693-01 - Manual (Page 5)

Electronic Actuated Pressure Reducing
and Solenoid Shut Off
Typical Applications
Schematic Diagram
Item Description
1 Hytrol (Main Valve)
2 X58C Restriction Assembly
3 CRD-30 Electronic Pressure Reducing Control
4 100-01 Hytrol (Reverse Flow)
5 CS3 Solenoid Control
6 X105LC Limit Switch Assembly
Optional Features
Item Description
A X46A Flow Clean Strainer
B CK2 (Isolation Valve)
C CV Flow Control (Closing)
D Check Valves with Isolation Valve
P X141 Pressure Gauge
S CV Flow Control (Opening)
V X101 Valve Position Indicator
Y X43 "Y" Strainer
High Pressure
Transmission Line
CLA-VAL
393-01/3690-01
Electronic Actuated
Pressure Reducing and
Solenoid Shutoff Valve
Lower Pressure Distribution
SCADA
Computer
Remote Set Point
Higher Upstream
Pressure
Remote Telemetry Unit
(Customer Supplied)
Process Variable
(Lower Downstream
Pressure)
D2
D3
OUTLET
B
A
1
INLET
6
B
C
B
Y
S
4 2
D1
5
CS3
3
1
2
3
The valve is designed to be used with supervisory control systems
having a isolated remote analog setpoint output and a process variable
(downstream pressure) input and on-off signal from solenoid.
An application for this valve is reducing high transmission line pressure
to lower distribution system levels, while opening and closing on
command. The solenoid control feature can be activated by an electrical
signal from a timer or programmer.
It is also an effective solution for lowering direct costs associated with
“confined space” requirements by eliminating need for entry into valve
structure for setpoint adjustment and system information.
Additional Pilot Controls, hydraulic and/or electronic, can be easily
added to perform multiple control functions to fit exact system
requirements.
• Simplified Interfacing with SCADA Systems
• Accepts Local or Remote Setpoint
• Integral Loop Power Supply
• Accurate Pressure Control
• Reliable Hydraulic Operation
• Rugged Durable Design
The Cla-Val Model 393-01/3693-01 Electronic Actuated Pressure
Reducing and Solenoid Shut Off Control Valve combines the precise
control of field proven Cla-Val hydraulic pilots and the convenience and
versatility of remote setpoint control. The 393-01/3693-01 is an accurate,
pilot-operated regulator capable of holding downstream pressure to a
pre-determined delivery pressure. When downstream pressure exceeds
the pressure setting of the control pilot, the pilot valve and main valve
close drip-tight. A solenoid control is provided to intercept the operation
of the pressure reducing control and close the main valve. This valve is
furnished either normally open (de-energized to open), or normally
closed (energized to open). The pilot control, consisting of a hydraulic
pilot and integral controller, accepts a setpoint and compares it with a
pressure or internal potentiometer position signal and makes incremental
adjustments to modulate the valve to a setpoint. The X105 limit switch
prevents actuator travel when the solenoid closes the valve.
Adjustable solid state limit switches eliminate over ranging. In the event
of a power or transmitter failure, the CRD-30 hydraulic pilot remains in
valve control virtually assuring system stability under changing conditions.
If the optional check feature (“D”) is added, and a pressure reversal
occurs, the valve closes to prevent return flow.
393-01
MODEL
(Full Internal Port)
3693-01
(Reduced Internal Port)