Data Sheet

GX 3--Way Valve and Actuator
Product Bulletin
51.1:GX 3--Way
August 2011
5
Easy maintenance. The simple screwed seat-ring
and one-piece plug and stem design provide easy
maintenance. Design simplicity and parts
commonality contribute to reduced spares inventory.
The integrated DVC2000 digital valve controller
allows easy instrument removal, without a
requirement for tubing disconnection or replacement
(fail-down construction).
Digital valve controller. The GX 3-Wayisavailable
with the DVC2000 digital valve controller. The
DVC2000 is easy to use, compact, and designed for
easy mounting. It converts a 4-20 mA input signal
into a pneumatic output signal, which feeds the
control valve actuator. Instrument setup is performed
with a push button and liquid crystal display (LCD)
interface. This interface is protected from the
environment within a sealed enclosure. The interface
supports multiple languages, including German,
French, Italian, Spanish, Chinese, Japanese,
Portuguese, Russian, Polish, Czech, Arabic, and
English.
Intrinsic safety and non-incendive construction is
available to CSA, FM, ATEX, and IEC standards. An
optional module provides integrated limit switches
and a position transmitter.
Integrated mounting. The DVC2000 digital valve
controller integrally mounts to the GX 3-Way
actuator, eliminating the need for mounting brackets.
The DVC2000 transmits a pneumatic signal to the
actuator casing via an air passage in the yoke leg,
causing the valve to stroke (see figure 13). This
eliminates the need for positioner-to-actuator tubing
in the fail-down configuration.
The DVC2000 mounting interface is identical on both
sides of the actuator yoke for valve body sizes DN
25 through DN 100 (NPS 1 through 4). This
symmetrical design allows the DVC2000 to be easily
moved from one side of the valve to the other
without the need to rotate the actuator.
Linkage-less feedback. The DVC2000 digital valve
controller offers as standard a non-contacting valve
position feedback system. This is a true linkage-less
design, which uses no levers and no touching parts
between the valve stem and the positioner.
Additional Accessory selection. The GX 3-Way is
available with a variety of digital or analog
positioners besides the DVC2000, as well as
solenoid and limit switches. The actuator is also
compatible with the IEC 60534-6-1 (NAMUR)
positioner mounting standard.