Data Sheet

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Fisherr GX Bulletin Supplement
Use this bulletin supplement in conjunction with
bulletin 51.1:GX, Fisher GX Control Valve and Actuator
System, D103171X012. This supplement provides
additional information for the Fisher GX control valve
and actuator.
The standard GX actuator comes with a supply
pressure range of 4 to 6 bar (58 to 87 psi) for both
air-to-open (ATO) and air-to-close (ATC)
configurations. By selecting the appropriate option,
the GX actuator will operate with a minimum supply
pressure of 3 bar (44 psi) and 2 bar (29 psi) at the
expense of maximum allowable shutoff pressure.
Note: These options do not apply to the size 1200
actuator which operates on a standard pressure range
of 3 to 6 bar.
Theprimaryfocusofthisbulletinistoprovide
maximum pressure drop tables for the corresponding
GX constructions.
Each of these tables includes air-to-open (standard)
and air-to-close (optional) actuator configurations for
varying supply pressure ranges, as well as the
maximum actuator air supply pressure and associated
pressure drop.
Tables are also provided for shutoff classification
capability. These tables immediately follow their
respective constructions. See table 1 for an index of
these tables.
Table 1. Index to Trim Tables
Stem Material Bonnet Style
Max Pressure
Drop and
Max Supply
Pressure
Shutoff
Capabilities
High Strength
Standard Table 2 Table 3
Extension /
Bellows
Table 4 Table 5
Low Strength
Standard Table 6 Table 7
Bellows Table 8 Table 9
High Strength Stem Material: S31603, S20910,
N05500
Low Strength Stem Material: N06022, S31803,
N10665
W8861
Fisher GX Control Valve, Actuator, and
FIELDVUEt DVC2000 Digital Valve Controller
GX Control Valve and Actuator
D103209X012
Product Bulletin
51.1:GX(S1)
February 2012