Data Sheet

EH and EHA Valves
D100042X012
Product Bulletin
51.2:EH
April 2015
3
Specifications
Available Configurations
See table 1
Common Characteristics: EH valves are single-port,
high-pressure, globe-style valves with metal seats, cage
guiding, and push- down- to- close valve plug action.
EHA valves are angle versions of EH valves
EHD/EHAD: Uses a balanced valve plug
(1)
with graphite
valve plug piston rings; also, see tables 4 and 5
EHS/EHAS: Uses an unbalanced valve plug. For low-flow
applications, smaller valve sizes are available with
specialized valve plug designs. See tables 4
(1)
and 5
EHT/EHAT: Uses a balanced valve plug
(1)
with a
pressure-assisted PTFE valve plug seal ring; also, see
tables 4 and 5
NPS 20 Valve Rating
J Intermediate Standard Class 2185 (per ASME B16.34)
or J other ratings available per customer specifications
Valve Sizes
J Globe Valves: Tables 4 and 6
J Angle Valves: Table 5
End Connection Styles
(2)
Buttwelding Ends (BWE): See table 6 for all available
ASME B16.25 schedules that are compatible with ASME
B16.34 pressure/temperature ratings
Flanged Ends: J CL900, J CL1500, or J CL2500
J ring-type joint (RTJ) or J raised-face (RF) flanges
according to ASME B16.5. Flanged ends for EHA valves
are available in CL900 and 1500 only
Socketweld Ends (SWE): See table 6 for those valve sizes
available with socketweld end connections according to
ASME B16.11 that are compatible with ASME B16.34
Maximum Inlet Pressures and Temperatures
(2,3)
Consistent with applicable CL900, 1500, or 2500
pressure/temperature ratings (for EH valves) according
to ASME B16.34 unless limited by individual
temperature limits shown in the Material Temperature
Capabilities specification
(7)
or in figure 20.
In addition, both steel EH and EHA valves with BWE
connections have increased pressure/ temperature
ratings as shown in table 7
Maximum Pressure Drops
(3)
Valve With Standard Cage: See figures 20, 21, and 22
Valve With Cavitrol™ III Cage: 149 bar (2160 psi) for
two-stage cage and 207 bar (3000 psi) for three-stage
cage. Consult Fisher Bulletin 80.2:030, Fisher Cavitrol III
One-, Two-, and Three-Stage Trims, D100196X012 for
more information
Valve With DST Trim:
J 103 bar (1500 psi) for three-stage trim,
J 207 bar (3000 psi) for four-stage trim, and
J 289 bar (4200 psi) for six-stage trim.
Consult Fisher bulletin 80.2:021, Fisher Dirty Service
Anti-Cavitation Trim (DST), D102310X012 for more
information
Valve With Whisper Trim™ III Cage:
J 0.6 ΔP/P
1
maximum for Levels A1 and A3,
J 0.75 ΔP/P
1
maximum for Levels B1 and B3,
J 0.85 ΔP/P
1
maximum for Levels C1 and C3,
J 0.99 ΔP/P
1
maximum for Levels D1 and D3
Valve with WhisperFlo™ Trim:
J Levels X, Y, and Z: 0.94 ΔP/P
1
maximum. If greater
than 0.94 ΔP/P
1
, consult your Emerson Process
Management sales office.
Construction Materials
All Except NPS 20 Valve
Body and Bonnet: J WCC steel, J LCC steel, J WC9
chrome-moly steel, J C12A chrome-moly alloy, or
J CF8M (316 SST or 316H SST for service above 538_C
[1000_F])
Trim: Trim materials are listed in table 10 and 11. Special
materials for trim and valve body are available. Please
consult your Emerson Process Management sales office.
Other Parts: See tables 12 and 13
Yoke Temperature Limit (NPS 8 to 20 Valves): Standard
bonnet with cast iron yoke is limited to 537_C (1000_F)
NPS 20 Valve
Valve Body and Bonnet: SA 217 Grade WC9 steel
Cage: Cast M152 SST
Valve Plug: CF8M (316 stainless steel) with alloy 6 seat
and guide
Seat Ring: CF8M with CoCr-A (alloy 6) seat or N06600
with CoCr-A seat
Seat Ring Bolting: N07718
Valve Stem: J SA 286 Grade 660 Condition 2 stainless
steel or J other materials upon request
Piston Rings: Graphite
Cage & Seat Ring Gaskets: Silver-plated N04400
Body/Bonnet Bolting: J B7/2H, J B16/Gr-7
Packing Rings: Carbon/graphite composition, graphite,
and zinc
Packing Box Bushing: Graphite
Packing Box Flange, Studs, and Nuts: S31600 (316
stainless steel) (other materials are available on request)
Packing Springs: J G61500 (6150 steel),
J S17700 (17-7 stainless steel), or J N07718
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