Chemical Engineering September 2020 - 47

Water Management 2020 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
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.
Smooth, Quiet & Efficient Chemical Feed
The Peristaltic Solution to Chemical Dosing
F
lex-Pro Peristaltic Metering Pumps are currently
offered in three model sizes. All of
which are designed to deliver smooth quiet
pumping action and precise chemical feed.
Flex-Pro peristaltic units offer an exclusive
heavy-duty pump head tubing in multiple
sizes and material options, designed to
meet a wide range of chemical compatibility
requirements. The Multi-Tube design delivers
tube life up to four times longer than average
single tubes. Because of the extended tube
life, pump maintenance and related costs are
greatly reduced.
Flex-Pro pumps are engineered to be rugged
and efficient with two CNC machined rollers
and two alignment rollers for optimum
squeeze and tube life. The single-piece heavy
duty rotor means no flexing and increased
accuracy, with no metal springs or hinges to
corrode.
The sturdy pump head cover is a clear
acrylic that has been annealed for added strength and chemical resistance.
There are no tools required for pump head cover removal
during routine maintenance allowing for quick and easy access.
Flex-Pro peristaltic pumps help provide solutions in a number of
industries. Two examples are:
A popular craft brewing company located
in California has been using A2 Peristaltic
Pumps to assist with the purification of
wastewater generated by its brewing process.
The brewery and the packaging hall
generate about 100,000 gallons of wastewater
per day. They use two Flex-Pro A2 pumps,
one injects a solution of 12.5% sodium hypochlorite
into the membrane bioreactor filter
backwashes, and 93% sulfuric acid prior to
reverse osmosis, the second pump injects
12-14% sodium hydroxide to bring reclaimed
water to a pH of 8 to prevent pipe corrosion.
An energy company located in Florida
uses Flex-Pro to inject 12.5% sodium hypochlorite
into reuse water to prevent biological
build up within the water tubes of their
condenser. Any build up within the condenser
would greatly reduce efficiency to produce
steam, hence less mechanical power.
Flex-Pro Peristaltic Metering Pumps are
manufactured in the U.S.A., and are NSF, ETL, CE listed. NEMA 4X
/ lP66 rated. Blue-White is ISO 9001:2015 Certified. Output rates
range from 17.2 GPH (65.1 LPH) up to 158 GPH (600 LPH) at max
pressure of 125 PSI (8.6 Bar).
www.blue-white.com
ChemiCal engineering www.Chemengonline.Com September 2020
47
www.collinsinst.com

http://www.collinsinst.com http://www.blue-white.com http://www.Chemengonline.Com

Chemical Engineering September 2020

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