Instruction Manual
D100392X012
EH Valves NPS 8 through 14
July 2014
2
Table 1. Specifications
End Connection Styles
(1)
Buttwelding: All available ASME B16.25 schedules
that are compatible with ASME B16.34
pressure/temperature ratings
Flanged Ends: CL1500 or 2500 J raised-face (RF) or
J ring-type joint (RTJ) flanges per ASME B16.5
Shutoff Classifications
See table 2
Bore seal trim: High-temperature, Class V.
See table 3
Flow Characteristic
Standard Cages: J Linear, J equal percentage, or
J modified equal percentage
(2)
Whisper Trim™ III Cages: J Linear or J modified
characteristics available upon request
Flow Direction
Normallyflowdown(inthroughthecagewindows
and out through the seat ring) for all cage styles
except for applications using either a Whisper Trim III
cage or a diverter cone plug, both of which are flow
up only
Additional Specifications
For specifications such as materials, valve plug
travels, and port, yoke boss, and stem diameters, see
the Parts List section
Approximate Weights
See table 4
1. The pressure or temperature limits in this manual and any applicable standard limitations should not be exceeded.
2. Valves using an equal percentage cage may be travelled an additional 13 mm (0.5 inch) if desired to obtain additional capacity; flow characteristic becomes modified equal percentage.
Table 2. Shutoff Classifications
(1)
Valve Design ANSI/FCI LEAKAGE CLASS
EHD
III–Standard
IV–Optional
EHT
IV–Standard
V–Optional
EHT w/ PEEK
(2)
Anti-Extrusion Rings V to 316_C (600_F)
1. Per ANSI/FCI 70-2 and IEC 60534-4
2. Poly Ether Ether Ketone
Description
The EHD and EHT valves, shown in figure 1, are large, sliding-stem, high-pressure, globe-style valves. These valves
have metal seats, cage guiding, and push-down-to-close valve plug action.
The EHD and EHT valves feature balanced valve plugs. To provide a seal between the valve plug and cage, the EHD
valve plug has piston rings; the EHT valve plug has a pressure-assisted seal ring.
Bore seal trim is available for EHD valves, CL1500, NPS 8 and 10 and CL2500, NPS 8, 10, 12, and 14.
With Bore seal trim, a balanced valve can achieve high-temperature, Class V shutoff. Because the Bore seal plug seal is
formed from metal (N07718 nickel alloy) rather than an elastomer, a valve equipped with the Bore seal trim can be
appliedinprocesseswithafluidtemperatureofupto593_C (1100_F), provided other material limits are not
exceeded.
Specifications
Specifications for the EHD and EHT valves are shown in table 1.
(24 pages)
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