Optimized valve and actuator system. Product simplicity and ease of selection form the foundation of the GX. Mounted with a digital or analog positioner, the GX provides high performance control across a wide range of process applications.Compact actuator design. The GX utilizes a compact, multi-spring actuator. The GX design has been optimized to eliminate complicated actuator sizing procedures - once the valve body, port size, and air supply pressure are selected, the actuator size is fixed.Modular design. The design architecture has been optimized to maximize the use of common parts across sizes. The actuator stem and stem connector are used across all GX sizes. The GX actuator uses a total of 5 different springs across all valve sizes. These spring sets have been optimized to allow for maximum application coverage. The plug/stem assemblies and packing sets are common across several sizes, as well.Low lifetime costs. Reduced product complexity, low parts count, and part commonality all contribute to reduced inventory and maintenance costs.Stable flow control. The flow cavity of the GX valve body has been engineered to provide stable flow and reduce process variability.Live-loaded packing. The GX comes with live-loaded PTFE V-ring packing as standard. The live-loaded design helps to seal your process to conserve valuable process fluid, while reducing emissions to the environment. The long-life and high reliability of the live-loaded system also reduces maintenance costs and process downtime. For applications exceeding 232°C (450°F), live-loaded ULF (Ultra Low Friction) graphite packing and extension bonnets are available for all sizes except DN150.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).Long life. Alloy valve constructions and hardened trim materials are available in the GX to increase valve body, bonnet, and trim life.Cryogenic offering. The GX is available in a low temperature construction. The compact design maintains high performance in low temperature applications, while minimizing overall envelope size.Digital valve controller. The GX is available 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 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. 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 15 through DN 100 (NPS 1/2 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. The DN 150 (NPS 6) yoke is not symmetrical.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 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.
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