Data Sheet

GX 3--Way Valve and Actuator
Product Bulletin
51.1:GX 3--Way
August 2011
11
GX 3-Way Control Valve Specifications and Materials of Construction
See tables 1 and 2.
Table 1. Fisher GX 3 - Way Valve Specifications
(1)
Specifications EN ASME
Valve Body Size DN 25, 40, 50, 80, 100 NPS 1, 1--1/2, 2, 3, 4
Pressure Rating
PN 10 / 16 / 25 / 40 per EN 1092-1
CL150 / 300 per ASME B16.34
End Connections
Flanged raised face per EN 1092-1
Flanged raised face per ASME B16.5
Screwed (NPS 1, 1--1/2, and 2)
Valve Body Materials
1.0619 steel ASME SA216 WCC steel
1.4409 stainless steel ASME SA351 CF3M stainless steel
Bonnet Materials
1.4409 stainless steel / CoCr-A SA351 CF3M SST / CoCr-A
Face-to-Face Dimensions
Seetable10
Shutoff per IEC 60534-4
and ANSI/FCI 70-2
Metal seat - Class IV (standard)
SPC HT construction: Metal seat -- Class IV for bottom seat, Class II for upper seat
Flow Direction Converging and Diverging
Trim Style
Type Plug Sizes Description
Side Port Common All sizes
Unbalanced Port-guided
Bottom Port Common All sizes
Balanced Cage-guided
1. Stainless steel valve body is recommended for steam service w hen the high temperature (HT) construction is selected.
Table 2. Materials (Other Valve Components)
Component Material
Packing Follower S21800 SST screwed follower
Body/Bonnet
Bolting and Nuts
SA193-B7 studs / SA194-2H nuts with NCF2 coating for carbon steel and stainless steel constructions
Packing
Live-loaded PTFE V-ring (standard) with N07718 Belleville springs
Live-loaded Graphite ULF (optional) with N07718 Belleville springs, (standard) on HT construction.
Bonnet Gasket Graphite laminate
Bottom Port
Common Trim
(all sizes)
Carbon-Filled PTFE Seal Ring
Back-up Rings
NBR (Standard) --46 to 82_C (--50 to 180_F)
Ethylene Propylene [EPDM] (Optional): --46 to 232_C (--50 to 450_F) in steam and hot water;
--46 to 121_C (--50 to 250_F) in air (EPDM is not recommended for use in hydrocarbons)
FKM Fluorocarbon (Optional): --18 to 204_C(0to400_F) (Applicable in a wide variety of solvents,
chemicals, and hydrocarbons. Avoid use with steam, ammonia, or hot water over 82_C [180_F])
O-ring
(not used with
GX 3--Way HT)
NBR (Standard) --46 to 82_C (--50 to 180_F)
Ethylene Propylene [EPDM] (Optional): --46 to 232_C (--50 to 450_F) in steam and hot water;
--46 to 121_C (--50 to 250_F) in air (EPDM is not recommended for use in hydrocarbons)
FKM Fluorocarbon (Optional): --18 to 204_C(0to400_F) (Applicable in a wide variety of solvents, chemicals, and
hydrocarbons. Avoid use with steam, ammonia, or hot water over 82_C [180_F])
Seal Ring
(GX 3--Way HT)
Graphite (FMS 17F27) --46 to 371_C (--50 to 700_F)
Stem Extension
(GX 3--Way HT)
Stainless steel