Data Sheet

EH and EHA Valves
D100042X012
Product Bulletin
51.2:EH
April 2015
4
Specifications (continued)
Shutoff Classifications
See table 9
For NPS 20 valves, one-half of Class IV leakage (0.005%
of valve capacity at full travel) per ANSI/FCI 70-2 and IEC
60534-4
Material Temperature Capabilities
(3)
EHD/EHAD and EHS/EHAS: Up to 593_C (1100_F) unless
limited by selection of standard trim materials (table 10
and 11 and figures 20, 21, and 22), Cavitrol III and
Whisper Trim III trim materials (table 10), or other parts
(table 12)
EHT/EHAT: Up to 316_C (600_F) unless limited by
selection of standard trim materials (tables 10 and 11
and figures 20, 21, and 22), Cavitrol III and Whisper Trim
III trim materials (table 10), or other parts (tables 12 and
13)
Flow Characteristic
Standard Cage: J Equal percentage, J modified equal
percentage
(4)
, or J linear
Micro-Form Valve Plug (for EHS and EHAS only):
J Equal percentage or J modified equal percentage
(4)
.
Micro-Flute Valve Plug (for EHS and EHAS only):
J Equal percentage or J modified equal percentage
(4)
Micro-Flat Valve Plug (EHAS only): J Linear
Cavitrol III, Whisper Trim III, or WhisperFlo: J Linear
Special cages: Special characterized flow characteristic
cages are available. Please consult your local Emerson
Process Management sales office.
Flow Direction
Standard Cage
J EHD: Normal flow down
(8)
J EHS: Normal flow up
(5)
J EHT: Normal flow down
(8)
J EHAD: Normal flow down
J EHAS: Normal flow up
J EHAT: Normal flow down
Cavitrol III Cage: Flow down
Whisper Trim III cage: Flow up
WhisperFlo Trim: Flow up
For NPS 20 Valves: J Flow up through seat ring and out
through cage openings (for standard and Whisper
cages)
Flow Coefficients
See Fisher Catalog 12 section 1
Noise Levels
See Fisher Catalog 12, section 3 for noise predictions
methods
NPS 20 Valve Maximum Flow Coefficient
Approximately 92,000 C
g
or 2600 C
v
for modified equal
percentage characteristics
Port Diameters
See tables 17 and 18 for NPS 1 through 6 for NPS 1
through 6
NPS 8 and 10x8 Valves
CL1500: 178 mm (7 inch) port diameter
CL2500: 137 mm (5.375 inch) port diameter
NPS 12, 14, and 14x12 Valves
CL1500: 254 mm (10 inch) port diameter
CL2500: 178 mm (7 inch) port diameter
NPS 16x12 Valves
CL1500: 254 mm (10 inch) port diameter
CL2500: 254 mm (10 inch) port diameter
NPS 20 Valves: 355.6 mm (14 inches)
Valve Plug Travel and Stem Diameters
(9)
See tables 14, 17, and 18
5 Inch H
(10)
Boss Diameter: 31.8 mm (1.25 inches) stem
diameter
7 Inch Boss Diameter: 50.8 mm (2 inches) stem
diameter
NPS 20 Valves: Valve Plug Travel: 85.7 mm (9.125 inches)
Valve Stem Diameter: 50.4 mm (2 inches)
Bonnet Style
J Standard bonnet (figures 3 and 4) for all valve sizes,
standard bonnet with cast iron yoke is limited to 537_C
(1000_F)
J Optional Style 1 extension bonnet for NPS 1 and 2
globe valves, see figure 24
Packing Arrangements
J Single, J double, and J leakoff standard packing
arrangements, or optional J HIGH-SEAL packing
systems; see Fisher bulletin 59.1:061,
ENVIRO-SEAL™ and HIGH-SEAL Packing Systems for
Sliding-Stem Valves, D101633X012
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