1 GX Control Valve and Actuator SystemThe Fisher GX is a compact, state-of-the-art controlvalve and Actuator System , designed to Control a widerange of process liquids, gases, and GX is rugged, reliable, and easy to select. Itrequires no Actuator sizing -- the Actuator selection isautomatic once the Valve body construction optimized design results in reduced complexityand parts count. As a result, the cost of maintenance GX meets the requirements of both EN and ASME standards. It is available with a complete accessorypackage, including the Fisher FIELDVUE DVC2000and DVC6200 integrated digital Valve Easy to size and selectn No Actuator sizing required--selection is automaticn Optimized Actuator allows for a wide range of airsupplyn Engineered for easy maintenancen Maximum part commonality across sizesn Replaceable trimn Low lifetime costsn Robust, low-profile designn Compact multi-spring pneumatic actuatorn Available with integrated, easy-to-calibrateDVC2000 or DVC6200 digital Valve controllerW8861 Fisher GX Control Valve , Actuator .
2 And FIELDVUE DVC2000 Digital Valve Controllern Valve body sizes DN 15 to DN 150 (NPS 1/2 through 6)n Pressure Classes PN 10-40, CL150 and 300n High capacity designn Valve body flow passage optimized for flowstabilityn Full range of materials, including alloysn Shutoff capabilities: Class IV, V, and VIn Rangeability of 50:1 (equal percentage)n Optional metal bellows sealn ISO 5210 F7 mounting available for use with electricactuatorsGX Control Valve and ActuatorD103171X012 Product :GXAugust 2017GX Control Valve and ActuatorD103171X012 Product :GXAugust 2017 2W8568-1 ACOMPACT FIELD-REVERSIBLEMULTI-SPRING ACTUATORINTEGRATED POSITIONERMOUNTINGNAMUR POSITIONERMOUNTING CAPABILITYONE-PIECE SCREWEDPACKING FOLLOWERCLAMPED BONNET DESIGNSTANDARD ENVIRO-SEAL PACKINGINTEGRAL PNEUMATIC PASSAGEWAYSF igure 1.
3 Fisher GX Control Valve Assembly with Port-Guided Contoured Plug (Port Sizes 36 to 136 mm)Optimized Valve and Actuator System . Productsimplicity and ease of selection form the foundation ofthe GX. Mounted with a digital or analog positioner,the GX provides high performance Control across awide range of process Actuator design. The GX utilizes a compact,multi-spring Actuator . The GX design has beenoptimized to eliminate complicated Actuator sizingprocedures - once the Valve body, port size, and airsupply pressure are selected, the Actuator size is design. The design architecture has beenoptimized to maximize the use of common partsacross sizes.
4 The Actuator stem and stem connectorare used across all GX sizes. The GX Actuator uses atotal of 5 different springs across all Valve sizes. Thesespring sets have been optimized to allow for maximumapplication coverage. The plug/stem assemblies andENVIRO-SEAL packing sets are common across severalsizes, as of Operation Fisher GX Control Valve GX Control Valve Specificationsand Materials of Construction Cavitrolt III for DN25 (NPS 1) throughDN50 (NPS 2) Whisper Trimt III for DN80 (NPS 3) throughDN150 (NPS 6) Fisher GX Diaphragm Actuator ISO 5210 Electric Actuator Mounting Extension Bonnet Dimensions and Weights GX Actuator Accessories Fisher FIELDVUE DVC2000 Digital Valve Controller Positioners and Instruments Handwheels Control Valve and ActuatorD103171X012 Product :GXAugust 2017 3 Figure 2.
5 Fisher GX and DVC2000 Digital Valve ControllerLINKAGE-LESSPOSITIONFEEDBACKPU SH-BUTTONINSTRUMENTSETUPW8588 DVC2000 COVERLow lifetime costs. Reduced product complexity, lowparts count, and part commonality all contribute toreduced inventory and maintenance flow Control . The flow cavity of the GX valvebody has been engineered to provide stable flow andreduce process Requirements ENVIRO-SEAL packingsystems provide an improved stem seal to helpprevent the loss of valuable or hazardous process GX comes standard with ENVIRO-SEAL PTFE packing. For applications exceeding 232_C (450_F),ENVIRO-SEAL graphite ULF packing and extensionbonnets are 3.
6 Fisher GX Cryogenic ValveW9343 Easy maintenance. The simple screwed seat-ring andone-piece plug and stem design provide easymaintenance. Design simplicity and partscommonality contribute to reduced spares integrated DVC2000 and DVC6200 digital valvecontrollers allow easy instrument removal, without arequirement for tubing disconnection or replacement(fail-down construction).Long life. Alloy Valve constructions and hardened trimmaterials are available in the GX to increase valvebody, bonnet, and trim offering. The GX is available in a lowtemperature construction (see figure 3).
7 The compactdesign maintains high performance in lowtemperature applications, while minimizing overallenvelope face-to-face offering. The GX is available long face-to-face dimensions for DN25to 50 (NPS 1 to 2). All GX Control valves have integralflanges, providing replacement for separable flangeand other long face-to-face Control Valve and ActuatorD103171X012 Product :GXAugust 2017 4 Figure 4. Fisher GX Principle of Operation -- Actuator Air SupplyFAIL-DOWN (REVERSE ACTING)FAIL-UP ( direct ACTING)AIR SUPPLYAIR SUPPLYAIR VENTAIR VENTD igital Valve controller. The GX is available with theDVC2000 digital Valve controller.
8 The DVC2000 is easyto use, compact, and designed for easy mounting. Itconverts a 4-20 mA input signal into a pneumaticoutput signal, which feeds the Control Valve setup is performed with a push button andLCD interface. This interface is protected from theenvironment within a sealed enclosure. The interfacesupports multiple languages, including German,French, Italian, Spanish, Chinese, Japanese,Portuguese, Russian, Polish, Czech, Arabic, safety and non-incendive construction isavailable to CSA, FM, ATEX, and IEC standards. Anoptional module provides integrated limit switchesand a position mounting.
9 The DVC2000 and DVC6200digital Valve controllers integrally mount to the GXactuator, eliminating the need for mounting DVC2000 transmits a pneumatic signal to theactuator casing via an air passage in the yoke leg,causing the Valve to stroke (see figure 4). Thiseliminates the need for positioner-to- Actuator tubingin the fail-down DVC2000 and DVC6200 mounting interfaces areidentical on both sides of the Actuator yoke for valvebody sizes DN 15 through DN 100 (NPS 1/2 through 4).This symmetrical design allows the DVC2000 to beeasily moved from one side of the Valve to the otherwithout the need to rotate the Actuator .
10 The DN 150(NPS 6) yoke is not feedback. The DVC2000 and DVC6200digital Valve controllers offer as standard anon-contacting Valve position feedback System . This isa true linkage-less design, which uses no levers and notouching parts between the Valve stem and Accessory selection. The GX is availablewith a variety of digital or analog positioners besidesthe DVC2000 or DVC6200, as well as solenoid andlimit switches. The Actuator is also compatible with theIEC 60534-6-1 (NAMUR) positioner of OperationIntegrated Air Supply. When mounted with theDVC2000 digital Valve controller, the GX uses anintegrated Actuator air supply System .