Chemical Engineering May 2016 - 89

Gulf Coast 2016 Special Advertising Section
Plastic control valves handle corrosive chemicals
Collins 2-in. valves and actuators are specially designed to handle corrosive fluids - acids,
bleaches, chlorine, pH control - and aggressive environments
C
ollins Instrument Company's line of
economical 2-in. flanged plastic control
valves handle corrosive liquids including
hydrochloric acid, caustic, sulfuric acid, and
many others. With bodies of either PVDF
or polypropylene, these highly-responsive
control valves are specifically designed for
use with corrosive media and/or corrosive
atmospheres.
Suitable for applications in numerous industries,
including chemical, petrochemical,
pulp and paper, and municipal, these valves
are extremely corrosion-resistant, and feature
fast-acting positioning (stroke rate
approximately 1⁄2 in./s). They are available
with a wide selection of trim sizes, in globe,
angle, and corner configurations.
The differential-area piston eliminates
the necessity for auxiliary loading regulators.
All actuator parts apart from the integral
positioner are molded of glass-filled,
UV-inhibited polypropylene. Before shipment,
the aluminum positioner and a portion
of the cylinder are immersed in Dip
Seal to provide atmospheric protection.
environments that can attack the outside
of the valve and actuator. Collins plastic
control valve packages withstand salty marine
atmospheres as well as industrial environments
that are too corrosive for metal
valves and actuators.
Plastic valves and actuators from Collins
The integral positioner eliminates the need
for external linkages which are subject to
corrosion and malfunctioning. Valves may
also be furnished without a positioner for
on/off applications.
Collins also offers a plastic pneumatic
actuator. The combination of a plastic actuator
and a plastic valve body provides an
effective way to handle both corrosive materials
flowing through the valve, and harsh
What you don't know can cost you
RedGuard explains some myths around blast-resistant buildings, which can be costeffective
as well as offering excellent protection to people and assets
learned that every application is different.
Fact: Our SafetySuites are permanent BRBs
that can be purchased to meet specific operational
needs for years to come.
Myth #2: BRBs are only for rush construction
jobs.
Though SafetySuites can be erected in
Well-designed blast-resistant buildings
are in no way inferior to traditional
constructions, says RedGuard
lot of myths still surround the use of
blast-resistant buildings (BRBs) as traditional
building replacements, writes Tim
Taton, North American Sales Manager with
RedGuard. Understanding these myths
could save many thousands of dollars, not
to mention lives.
Myth #1: Modular blast-resistant buildings
(BRBs) are only available for lease.
When we pioneered the BRB industry,
we offered only lease units, but we quickly
A
a fraction of the time needed for traditional
buildings, they are a superior, permanent
construction solution. They often cost less
than traditional buildings, and do a better
job of protecting personnel and resources.
Fact: BRBs are superior to traditional buildings
for all construction projects.
Myth #3: BRBs lack the comforts and amenities
of traditional buildings.
This myth is probably a holdover from
the early days, when all of our engineering
resources were devoted to creating the safest
building in the world.
Fact: The inside of a SafetySuite is often
indistinguishable from that of a traditional
building, offering all the same amenities.
Myth #4: A blast pressure rating is the only
important factor when specifying a BRB.
88
Blast pressure is a key part of the BRB
design formula, but duration and response
level ratings tell the real story of how a BRB
will hold up to a blast. Some manufacturers
claim a 5 or 8 psi rating, but with a high response
level. This is virtually meaningless,
as " high response " equates to high damage,
with a high risk of casualties. Interior
fittings are important, too, since a tough
steel box, alone, does not make a safe BRB.
Fact: Blast pressure ratings, taken alone,
can provide a misleading view of safety.
Myth #5: BRB design is still experimental.
While blast engineering is a comparatively
new science, RedGuard has worked
with some of the world's most respected authorities-and
then performed blast testing
under realistic conditions. A SafetySuite designed
for a specific application will protect
personnel during a blast event, at a fraction
of the cost and construction time of a traditional
building.
Fact: SafetySuites are built on proven engineering
concepts that have been fully tested
and proven safe. www.redguard.com
ChemiCal engineering www.Chemengonline.Com may 2016
Collins actuators incorporate a unique
internal locking ring to attach the cylinder
to the yoke. A semicircular groove is machined
inside the lower edge of the cylinder,
and a matching groove cut in the yoke.
When the yoke and cylinder are assembled,
a flexible polypropylene rod is inserted into
the groove through a slot in the side of the
cylinder, securing the two sections together.
Along with its corrosion resistance the
Collins control valve features a stem packing
arrangement that virtually eliminates
the problem of fugitive emissions, thereby
protecting the environment.
Located on the Texas Gulf Coast in
the town of Angleton, Collins Instrument
Company has been serving the chemical
and petrochemical industry for over
65 years.
www.collinsinst.com

http://www.collinsinst.com http://www.redguard.com http://www.Chemengonline.Com

Chemical Engineering May 2016

Table of Contents for the Digital Edition of Chemical Engineering May 2016