Chemical Engineering July 2017 - 28

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Voith Turbo
An efficient variable-speed drive
for compressors and pumps
The new Veco-Drive electric superimposing
gear
(photo)
www.alfalaval.com
combines
a
mechanical planetary gear with
frequency-controlled servo motors.
Since the gears only need a small part
of the rated power, an overall component
efficiency of more than 97% is
reached, says the company. Installed
between
a
constant-speed
motor
Alfa Laval
and a variable-speed compressor or
pump, the new drive combines the
reliability of mechanical gears with the
productivity of low-voltage variable
frequency drives (VFDs). The system
was designed for compressor and
pump applications with a maximum
output speed of 15,000 rpm, maximum
output power of 15 MW and
a speed adjustment range from 50
to 100%. Compared to a typical fullscale
medium-voltage VFD train with
a step-up gearbox, the measured
system efficiency of a Veco-Drive
device is about 2% higher over the
whole speed range, resulting in significantly
reduced energy consumption.
- Voith Turbo, a Group Division
of Voith GmbH, Crailsheim, Germany
www.voith.com
Save time and lost revenue with
this valve matrix solution
The Mixproof Valves valve matrix
(photo) is designed to increase product
safety, improve cleaning conditions
and eliminate risk of cross-contamination,
says the manufacturer.
The valve matrices can be supplied
pre-assembled and pre-tested, as well
as fully wired and with all the necessary
pneumatic tubing, junction boxes
and control
panels
COG - C. Otto Gehrckens
pre-connected.
A valve matrix - also known as a
valve cluster - is a way to maximize
process efficiency through optimized
flow management. Compared to traditional
flow plates, a valve matrix is
designed to allow simultaneous circulation
of liquids - including clean-inplace
media - on several levels with
the exact number of lines and rows
to match the specific requirements of
your process. The matrix ensures the
flexibility to route multiple products to
multiple destinations while other lines
are being cleaned. - Alfa Laval AB,
Lund, Sweden
28
A new range of
thermoplastic seals
VarioPur (photo) is a new product range
that includes three high-performance
materials based on thermoplastic polyurethanes
(TPU/AU). Both abrasion
and extrusion resistance are at least
five times higher than those of the traditional
material, NBR (nitrile butyl rubber).
The three TPU materials provide
excellent gas tightness and a high level
of tolerance to a wide range of gases
- from oxygen and nitrogen to all synthetic
hydrocarbons. The seals exhibit
no brittleness as a result of exposure
to ozone or oxygen, and undergo low
swelling in mineral oil, hydraulic media
and lubricating greases, and have generally
good chemical resistance and
dynamic behavior. In addition to the
high-performance universal TPU material
VarioPur 195, the VarioPur 295
delivers outstanding low-temperature
flexibility down to -50°C. VarioPur 395
is resistant to hydrolysis, and is extremely
stable in aqueous media, including
oil-water emulsions, water-oil
emulsions and aqueous polyglycol solutions.
- COG - C. Otto Gehrckens
GmbH & Co. KG, Pinneberg, Germany
www.cog.de
Control several channels with
this HART multiplexer
The new HART Multiplexer System
(photo) offers the possibility to drastically
reduce the number of multiplexer
modules, while maintaining the ability
to control up to 7,936 channels.
Through the integration of multiplexing
units in the Termination Board (TBD5001-HRT),
this system needs only
one modem to control 256 channels,
allowing users to manage up to 7,936
channels utilizing only 31 modules.
Compared to the current HART solutions
available on the market, which
require 496 modules, the HART Multiplexer
System greatly reduces the
number of required multiplexer modules.
The communication speed toward
the system has also been greatly
improved, reaching 115,200 bits per
second (bps), compared to the standard
38,400 bps of conventional
systems. The HART System is certified
for SIL 3 applications, in compliCHEMICAL
ENGINEERING WWW.CHEMENGONLINE.COM
JULY 2017
http://www.alfalaval.com http://www.voith.com http://www.cog.de http://WWW.CHEMENGONLINE.COM
Chemical Engineering July 2017

Table of Contents for the Digital Edition of Chemical Engineering July 2017
