Chemical Engineering September 2020 - 49

Water Management 2020 Special Advertising Section
Smart actuator optimizes control valve performance
The new Smart Electric Valve Actuator (SEVA) from Badger Meter stands
up to extreme conditions while providing exceptional position accuracy
ince 1905, Badger Meter has been recognized as a leader in the
development and manufacture of flow management solutions.
The company has introduced the latest generation of its Smart
Electric Valve Actuator (SEVA) solution, which now offers Modbus
RTU, Modbus TCP/IP and SoloCUE® connectivity.
SoloCUE connectivity
SoloCUE is a software solution that provides easy access to the
setup of both the feature-rich SEVA and its protocols. This custombuilt,
bulletproof platform allows end-users to visualize SEVA's performance
and setup characteristics.
Product design
SEVA employs cutting-edge technology and delivers exceptional
accuracy and repeatability. Designed for extreme conditions, the actuator
has military-grade components.
SEVA has 100-lb. and 200-lb. thrust models. There are several
options available for communication protocols, including Modbus
RTU, Modbus TCP/IP and the Industrial Ethernet Protocol (EtherNet/
IP). It is is certified by FM, EX, CSA and CE. The actuator allows for
both linear and Device Level Ring (DLR) ring network topologies.
Position accuracy
SEVA provides an exceptional level of position accuracy (±1%
of full scale) with five available positions when there is a loss of
power. The device also features four positions when there is a loss
S
of signal. Both the full closed and full open
positions are defined during setup.
In addition, SEVA has an internally powered
(active) feedback signal, which actively
communicates stroke position to the control
system. Its feedback sensors are crucial
in more precise applications. SEVA even
provides a manual override capability to help
the operator in loss-of-power situations.
Other features
The SEVA assembly has the option to include
two user-adjustable limit switch outputs.
An external signal is provided once the set
points of the limit switches are met. Furthermore, the electric actuator
can split the incoming 4-20 mA signal and use either the lower
or higher range of the signal for full stroke operation. A hyper terminal
server makes it possible to change the type of split range.
SEVA was specifically designed to minimize the number of models
needed to work with different electrical demands. Its Universal
AC Input with voltage protection will work with 115 V AC, 230 V AC
and 24 V DC power supplies. This feature ensures confidence that
the actuator will provide a single source for different process needs.
SEVA can receive analog input signals from 4-20 mA, 0-5 V DC or
0-10 V DC.
badgermeter.com/chemicalSEVA
Static mixers with low pressure drop
Ross LPD Low Pressure Drop Static Mixers are ideal for effective fluid mixing in water and
wastewater treatment processes
he Ross Low Pressure Drop (LPD) Static
Mixer enables more efficient dosing
of flocculants, disinfectants, neutralizing
T
agents and pH conditioners into a water
stream. This simple-to-install heavy-duty
device completely mixes treatment chemicals
within a short length of pipe. When
used in conjunction with automated instrumentation,
the LPD delivers predictable
quality control based on a virtually maintenance-free
operation.
The LPD Static Mixer consists of a series
of baffles or " elements " discriminately positioned
in series. Each element comprises a
pair of semi-elliptical plates set 90 degrees
to each other. The next element is rotated
90 degrees about the central axis with respect
to the previous baffle set, and so
on. For even lower pressure drop, an LLPD
model is also available, in which the plates
of each element are oriented at 120 degrees
relative to each other.
As the fluid moves through each LPD
Four or six mixing elements are usually
more than sufficient for effective mixing
under turbulent flow conditions, Ross says.
Diameters range from 1 in. through 48 in.
or LLPD element, flow is continuously split
into layers and rotated in alternating clockwise
and counterclockwise directions.
This method of subdividing the stream
and generating striations leads to highly
ChemiCal engineering www.Chemengonline.Com September 2020
efficient and repeatable mixing with minimal
pressure loss. During turbulent flow,
the baffles enhance the random motion
of molecules and the formation of eddies.
In most water and wastewater processes,
four or six elements are more than sufficient
to completely disperse treatment
chemicals and create a very uniform solution
or suspension.
Small LPD/LLPD mixers of 1 in. through
2.5 in. in diameter are welded to a central
rod, while larger elements are welded to
four outside support rods for maximum
rigidity and stability. Available in a wide
range of sizes up to 48 in. in diameter, these
mixers can be supplied as pipe inserts or as
complete modules with housing and injection
ports.
In addition to Static Mixers, Ross also
manufactures High Shear Mixers and MultiShaft
Mixers used in the production of
water treatment chemicals. The company
offers no-charge mixer testing services and
an extensive trial/rental program.
www.mixers.com
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http://www.badgermeter.com/chemicalSEVA http://www.mixers.com http://www.Chemengonline.Com

Chemical Engineering September 2020

Table of Contents for the Digital Edition of Chemical Engineering September 2020