Integrated Air Supply. When mounted with the DVC2000 Series digital valve controller, the Design GX uses an
integrated actuator air supply system.
In the air-to-open construction, air is supplied to the lower actuator casing via a port on the actuator yoke
face -- no tubing is required.
In the air-to-close configuration, air is supplied to the upper casing via tubing.
The Design GX Control Valve
The Design GX is a single port, flow-up globe style valve that offers stem-guided, port-guided, and balanced trim
with a screwed-in seat ring (see table below for a description of trim style availability). Each valve size offers an
unbalanced plug design, which eliminates dead spaces where fluid polymerization might occur.
Sizes DN80, 100, and 150 (3-, 4-, and 6-inch) also offer balanced trim to reduce actuator thrust requirements.
The Design GX incorporates a clamped bonnet and an easy-to-adjust screwed packing follower. The plug and
stem are a rugged, one-piece welded assembly.
The standard construction incorporates metal-to-metal seating, with a PTFE soft seat option for Class VI shutoff.
Class V shutoff is available with metal trim. Hardened trim with stellite overlay is available for erosive service, as well.
PTFE V-ring stem packing is standard with the GX.
The live-loaded system provides excellent stem sealing and extended service life. Live-loaded graphite ULF packing
and extension bonnets are available for high temperature applications. Both linear and equal percentage flow
characteristics are available in full port and restricted trim. Micro-FlowTM is available for applications requiring low flow
Standard valve body materials are carbon steel and stainless steel. Alloy materials are available for valve body sizes
DN 15 through DN 100 (0.5 through 4-inch) for highly corrosive applications.