Chemical Engineering September 2014 - 33

Tideflex Technologies
Focus on
Valves
Thermoplastic butterfly valve
enables many stopping positions
With its advanced, one-piece thermoplastic
design and construction,
the patent-pending BYV Series
Butterfly Valve (photo) offers a variety
of design advances, including a
hand lever that features a 72-spline
interlock mechanism that allows
for 19 stopping positions (every 5
deg). Pneumatic or electric actuators
are available. Available in a
variety of thermoplastic materials
(for the body, disc and
liner), in sizes from 2 to 12
in. (DN50-300), these butterfly
valves have a stembearing
and seal-retainer
design that enables accurate
stem positioning and retention,
says the firm. - Hayward
Flow Control, Clemmons, N.C.
www.haywardflowcontrol.com
Valve handles high-molecularweight
fluids in compressors
The Magnum HammerHead valve
(photo) is a versatile valve that can
be applied to all brands of reciprocating
compressors, and is specifically
designed for applications
involving high-molecular-weight
fluids at both low and high compressor
speeds. This valve's design
has been re-engineered using computational
fluid dynamics and finite
element analysis, improving the
valve flow area by 60% compared to
standard Magnum valves. Its new
streamlined flow path (with optimized
seat, guard and lift areas),
not only maximizes the valve flow
area but provides greater tolerance
to particles and liquids in the gas,
says the company, and allows it to
be applied at higher compressor
speeds compared to other poppet
valves. - Dresser-Rand, Houston
www.dresser-rand.com
Check valve prevents backflow
and odor at discharge points
The CheckMate Inline Check Valve
(photo)is ideal for backflow prevention
and odor mitigation from outfalls,
stormwater, oceans, rivers and
interceptors. The valve, available in
Hayward
Flow Control
Dresser-Rand
sizes from 4 to 72 in., has an elastomer,
fabric-reinforced unibody
construction. It can open to near
full pipe diameter, thereby reducing
head loss while maximizing the flow
capacity of the outfall, which is particularly
helpful in low-lying areas
where limited driving head
is available, says the company.
- Tideflex Technologies,
a Div. of Red Valve Co.,
Carnegie, Pa.
www.tideflex.com
GF Piping
Systems
Full plastic construction
provides a range of advantages
Traditional plastic regulating
valves (PRV) - which involve top
and bottom plastic elements held
together by metal screws - are
susceptible to leakage due to differential
expansion coefficients of the
component materials, and require
regular retorquing of the metal
screws during maintenance intervals.
By comparison, this firm's fully
plastic PRV (photo) has consistent
temperature expansion coefficients,
so it provides stable, long-term setpoint
behavior without the need for
regular adjustment, says the firm.
Its compact design enables the
valve to fit in confined spaces. It is
available in several polymers to enNote:
For more information, circle the 3-digit number
on p. 76, or use the website designation.
sure fluid compatibility, at a range
of standard- and low-pressure options.
Online support is available
to assist with proper sizing. - GF
Piping Systems Ltd., Schaffhausen,
Switzerland
www.georgfischer.com
A family of forged valves for severe
operating conditions
The new Pacific Forged line of highpressure
gate, globe and check
valves is available for use in power,
oil-and-gas and chemical markets.
These forged components are designed
for applications that are
likely to encounter high stress and
high thermal cycling. A countoured
ChemiCal engineering www.Chemengonline.Com September 2014
33
http://www.haywardflowcontrol.com http://www.tideflex.com http://www.georgfischer.com http://www.dresser-rand.com http://www.Chemengonline.Com
Chemical Engineering September 2014

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