Fisher GX Control Valve
The Fisher GX Control Valve and actuator system can meet a wide range of flow and pipeline sizing requirements. The GX Design is a single port, a 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.