Chemical Engineering May 2021 - 50

Gulf Coast 2021 Special Advertising Section
Special Control Valves and Actuating Systems
W
ELLAND & TUXHORN is your reliable
partner for Special Control Valves in
power plants, industrial plants and chemical/petrochemical
plants, such as: HP- and
LP- turbine bypass systems, turbine emergency
stop valves, turbine control valves,
steam conditioning valves, feedwater control
valves, minimum flow control valves,
cooling water injection valves, boiler start
up valves, boiler blow down valves, desuperheater
systems, hydraulic and pneumatic
actuating systems.
W&T supports the customer to reduce
CO2 by process optimization. The company
is distinguished by know-how, persistence,
openness to new assignments and the highest
developmental and quality standards,
which makes the products equally wellknown,
both domestically and abroad.
Research and development co-operation
with scientific and technical institutes creates
new theoretical knowledge which is
used directly in production, and in optimizing
valves currently available.
PRECISION & PROGRESS: First-class in
quality and long life
For over 100 years, the highest degrees
of precision, quality workmanship and long
useful life have defined the product development
and production. The robust, impervious
and solid construction assures
optimal performance and availability.
The consistently high degree of product
quality is a result of solid concepts. In addition,
a well-thought-out chain of quality assurance
measures ensure the long service
life of the products. Ongoing supervision
of technical drafting designs, manufacturing
inspections, strict testing of materials,
as well as thorough documentation of the
pressure and leakage tests: these are only a
few examples of strict quality standards at
Welland & Tuxhorn.
The long-standing quality assurance
and quality management system, certified
according to DIN ISO 9001 and other international
guidelines, guarantees highest
product quality. W&T is regularly inspected
by renowned inspection agencies and is in
compliance with all regulations.
TAILOR-MADE SOLUTIONS: Safety for all
projects.
The cutting-edge and highly-specialized
engineering and production enable W&T to
achieve a high level of quality in their fittings.
Each and every design concept takes
the individual customer's
specifications into
account.
The newest technologies
and a highlyqualified
team provide
the optimal prerequisites
for individual
special made-to-order
and low-volume
production.
W&T service
guarantee:
* The high level of
quality and functional
standards of
" Made in Germany "
products.
* Consistent focus of
the processes toward
customer solutions within this specialized
market.
* Comprehensive know-how in the fields
of steam control and conversion. From
valves (including actuators) to switches,
to peripheral circuit systems - W&T creates
the overview!
www.welland-tuxhorn.de
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.
50
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
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
CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM MAY 2021

http://www.welland-tuxhorn.de http://www.collinsinst.com http://WWW.CHEMENGONLINE.COM

Chemical Engineering May 2021

Table of Contents for the Digital Edition of Chemical Engineering May 2021