HIGH-PERFORMANCE BUTTERFLY VALVE S
Flowserve Corporation introduces the Valtek Valdisk high-cycle seat butterfly valve. The new
seat design, made of UHMWPE material, offers an ANSI/FCI 7-0-2 class six shutoff rating
after as many as 150,000 to 200,000 cycles.
The unique patent-pending design of this high-cycle seat uses the pressure of fluid in the
pipeline to compress and elongate an S-shaped soft seat, pressing it against
the disk to maintain shutoff. As the seat undergoes normal wear, the fluid
pressure compensates by pushing it further into the disk.
Valtek high-performance butterfly valves are recognized for
their ability to meet fugitive emission requirements and their
long-lasting, tight shutoff.
CIRCLE READER SERVICE #280
ELECTRIC CONTROL VALVE ACTUATORS
New Rotork electric, non-intrusive CVA control valve actuators
provide a major technological advance in precise operation, HMI
capabilities and fail-to-position protection as well as significant
They are available in linear and quarter-turn actions for a
wide range of control-valve applications and challenging working
environments. The new actuators eliminate the need for costly air
supplies and are easily integrated into most process control environments, including those that use Hart and
Foundation fieldbus protocols.
CVA actuators provide extremely precise control valve
operation with repeatability and resolution performance at
<0.1% of full scale. As a
standard feature, they
include wireless Blue-tooth communication
technology that can
be used for quick
and easy actuator
set-up and adjustment.
All Rotork CVA
actuators incorporate a
data logger, which provides
an extensive record of such
operational and maintenance-related data as valve torque
profiles and relevant statistical information. They utilize a
built-in super-capacitor that
provides an advanced, programmable method for fail-to-position protection.
CIRCLE READER SERVICE #45
FIRE PROTECTION VALVES
NIBCO INC. now offers select, high-pressure
fire protection valves with a 350 psi listing—
the highest UL pressure rating in the market for
these types of valves, according to the company.
The line of 350 psi valves includes the
grooved butterfly (GD6765-8N), which features
a nylon-coated finish and EPDM-encapsulated
disc for good closure during shutdowns.
It is gear operated for slow close
operation to protect piping from water
shock and is
butterfly valve is
to 350 psi water
working pressure and
UL listed for indoor and out-
Other high-pressure valves include the husky
Class 250 iron body gate valve (F697-0), which
also carries a 300 psi FM and NYC MEA
approval and the grooved double-door silent
check valve (KG900-W 350). Typical applications for these types of valves include fire protection systems for high rises and high-pressure
systems, with sizes ranging from 2-1/2 to 10
inches (excluding 5 inches).