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Instruction Manual Supplement
D104372X012
Fisher
Large EH Design Supplement
™
24X20 Class 1500 Design EHT-2 Control Valve
This supplement provides information for serial numbers ME00124272 and ME00124273
Overview
This special instruction manual is a supplement to the Fisher EHD and EHT Sliding-Stem Control Valves (Large EH)
Instruction Manual (D100392X012). Observe all warnings, cautions, and notes provided in the Large EH instruction
manual. Contact your
Emerson sales office
Scope
This special instruction sheet provides maintenance information for NPS 24X20 Class 1500 Design EHT-2 control
valves. This information covers valve serial numbers ME00124272 and ME00124273. For other procedures, refer to
the Fisher EHD and EHT Sliding-Stem Control Valve (Large EH) Instruction Manual (D100392X012).
Table 1. Fisher Large EH Specifications
Specifications
Design Pressure
Design Temperature
End Connections
Shutoff Classification
Flow Characteristic
Flow Direction
Port Diameter
Valve Plug Travel
Valve Yoke Boss
Maximum Flowing Pressure Drop
Maximum Shutoff Pressure Drop
Estimated Weight of Valve
and Actuator Assembly
www.Fisher.com
or Local Business Partner for more information.
NPS 24 CL1500 RTJ Flange
11500 kgf (25,500 lbf )
242 Barg (3510 Psig)
88°C (190°F)
ANSI Class IV
Linear - - See figure 3
Flow Down
18 1/4 in
10 7/8 in
7 in
103 bar (1500 psi)
258 bar (3750 psi)
Large EH
August 2018
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Summary of Contents for Emerson Fisher ME00124272
- Page 1 This special instruction manual is a supplement to the Fisher EHD and EHT Sliding-Stem Control Valves (Large EH) Instruction Manual (D100392X012). Observe all warnings, cautions, and notes provided in the Large EH instruction manual. Contact your Emerson sales office or Local Business Partner for more information. Scope This special instruction sheet provides maintenance information for NPS 24X20 Class 1500 Design EHT-2 control valves.
- Page 2 Large EH Instruction Manual Supplement August 2018 D104372X012 Figure 1. Assembly Drawing RETAINING RING BACK-UP RING ANTI-EXTRUTION RING SEAL RING PLUG/STEM ASSEMBLY DETAIL A BONNET SEAL RING STUD (QTY 16) DETAIL B GASKET (QTY 16) STUD SPACER (QTY 16) HEX NUT (QTY 16) PLAIN WASHER (QTY 16) CAGE/SEAT ASSEMBLY GASKET (QTY 2)
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Page 3: Trim Removal
Instruction Manual Supplement Large EH D104372X012 August 2018 Trim Removal Observe all warnings, cautions, and notes provided in the Large EH Instruction Manual (D100392X012). See figure 1 for assembly drawing. 1. Before removing actuator and disassembling valve, isolate the valve from all pressure and relieve trapped pressure from body and actuator. -
Page 4: Valve Plug Maintenance
If the fluorocarbon coating is damaged, it is recommended that the bolting be replaced or contact Emerson for the appropriate bolt torque value. Reassembling the body-to-bonnet bolting with damaged fluorocarbon-coating will require higher assembly torque to prevent leakage and to ensure proper valve operation. - Page 5 Instruction Manual Supplement Large EH D104372X012 August 2018 5. Install the replacement seat ring seal with the open side facing up (toward the top of the seat ring). The open side of the seal ring should face down (toward the bottom of the valve body) in flow-up installations and up in flow down installations.
- Page 6 Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co.