Chemical Engineering December 2019 - 24

Focus
Focus on Valves
Rembe
Safe combustible-dustexplosion
isolation
Isolation is essential to protect adjoining
system components against the
spread of combustible dust explosions.
Tanks, silos, dust collectors
and other equipment are usually connected
by pipelines through which, if
an explosion occurs, fire and pressure
spread very rapidly. In addition, the intensity
of the explosion in connected
containers is increased by pressure
piling and flame jet ignition. This sequence
of events can be prevented by
the EXKOP isolation system, consisting
of a control panel and one or more
quench valves (photo). The integrated
elastomer seal within the quench valve
closes within a few milliseconds, triggered
by a signal from an Explosion
Panel, a Q-Rohr, Q-Box, an infrared
signal or pressure/temperature sensors.
- Rembe Inc., Charlotte, N.C.
www.rembe.us
Rotork
GF Piping Systems
More control for this
electric valve actuator
This company has increased the versatility
of the CK range of modular
electric valve actuators with the introduction
of the CK Atronik (photo),
an intermediate-level integral control
option, providing a ready-to-operate
actuation solution to meet the standard
requirements of many plant
specifications. The CK Atronik control
module houses a reversing contactor
starter with mechanical and electrical
interlocking. Connection to a suitable
power supply is all that is required for
local operation of the actuator. Digital
microprocessor-driven functionality
delivers reliable motor control for isolating,
regulating or modulating valve
duties. Integral local-control selectors
are provided, together with clear LED
status indication of valve open, valve
closed, valve moving and alarm. -
Rotork plc, Bath, U.K.
www.rotork.com
ITT Engineered Valves
24
NSF lead-free valve family for
commercial water applications
This company has introduced a family
of NSF lead-free brass valves (photo)
designed to handle high loads and
Note: For more information, circle the 3-digit number on p. 150, or use the website designation.
CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM
DECEMBER 2019
strong flowrates in commercial-grade
and light-industrial water-distribution
applications. Valve styles include
pressure reducing, thermostatic
balancing and thermostatic mixing.
The compact, direct-acting Pressure
Reducing Valves (PRV) Type 1319
and 1339 feature excellent control
characteristics, even at low flowrates.
This patented design, which
offers a 416 stainless-steel floating
seat and modular construction, allows
for a more compact size. The
Type 6320 Thermostatic Balancing
Valve regulates the flowrate in hot (up
to 158°F) water circulating systems
by continuously sensing the return
water temperature with an integrated
thermostat, ensuring consistent system
temperature. The Thermostatic
Mixing Valves Type 3409 and 3419
accurately deliver tempered water
to hot-water-distribution systems. -
GF Piping Systems, Irvine, Calif.
www.gfps.com/us
This diaphragm valve touts
reduced maintenance
The EnviZion valve (photo) has embedded
technologies that allow for
a more streamlined installation and
maintenance process, delivering
less downtime, longer preventative
maintenance cycles and greater production
capacity for manufacturers.
An integrated thermal-compensation
system provides a constant sealing
force, helping to eliminate the effects
of thermal cycling. The EnviZion diaphragm
can withstand the wear of
production cycles and maintains a
reliable seal, minimizing the risk of
leakage and batch contamination.
The EnviZion valve delivers increased
productivity by keeping operations
online and running longer, as well
as reduced operating costs yielding
over 90% reduction in maintenance
time, says the company. - ITT Engineered
Valves, Lancaster, Pa.
www.engvalves.com
This actuator is lighter than its
stainless-steel counterparts
Designed to operate at 4.5 bars
while
maintaining closure perfor

http://www.rembe.us http://www.gfps.com/us http://www.rotork.com http://www.engvalves.com http://WWW.CHEMENGONLINE.COM

Chemical Engineering December 2019

Table of Contents for the Digital Edition of Chemical Engineering December 2019