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Instruction Manual
D103600X012
Fisher
EHAT NPS 16x20 Control Valve
™
Contents
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Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for NPS 16x20 EHAT valves with
CL900 ratings. Note: Applications requiring lower pressure class ratings may use the same casting as a higher rated
valve of the required size. Refer to separate manuals for instructions covering the actuator, positioner, and
accessories.
Do not install, operate, or maintain EHAT valves without being fully trained and qualified in valve,
actuator, and accessory installation, operation, and maintenance. To avoid personal injury or property
damage, it is important to carefully read, understand, and follow all the contents of this manual,
including all safety cautions and warnings. If you have any questions about these instructions, contact
your
Emerson sales office
Description
NPS 16x20 EHAT valves (figure 1) have schedule 100 buttweld end connections for inlet and schedule 40 buttweld end
connections for outlet. They are designed to use with a buyout piston actuator and also can be used with Fisher
667NS2 and 657NS2 actuators. NPS 16x20 EHAT valves are designed to handle high seismic environments.
Specifications
Specifications for EHAT valves are shown in table 1.
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before proceeding.
Figure 1. EHAT NPS 16x20 Valve with Piston Actuator
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X0708
EHAT NPS 16x20 Valve
September 2022
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Table of Contents
Related Manuals for Emerson Fisher EHAT NPS 16x20
Summary of Contents for Emerson Fisher EHAT NPS 16x20
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Page 1: Table Of Contents
If you have any questions about these instructions, contact your Emerson sales office before proceeding. Description NPS 16x20 EHAT valves (figure 1) have schedule 100 buttweld end connections for inlet and schedule 40 buttweld end connections for outlet. -
Page 2: Principle Of Operation
1. The pressure or temperature limits in this manual and any applicable standard limitations should not be exceeded. 2. EN (or other) ratings and other BWE can usually be supplied; consult your Emerson sales office. Table 2. Valve Assembly Approximate Weights... -
Page 3: Lifting Guidelines
Instruction Manual EHAT NPS 16x20 Valve D103600X012 September 2022 designed to move up and down (axially) inside the cage. The stem passes through a hole in the bonnet, and can be moved up and down (axially) by an external actuator attached to the bonnet. Packing is used between the valve bonnet and plug stem to prevent the fluid from leaking out of the valve, while still allowing the plug stem to move axially. -
Page 4: Installation
Instruction Manual EHAT NPS 16x20 Valve September 2022 D103600X012 Lifting Actuator Only The ATI L269.5SRE80 actuator with accessories may be lifted using the lifting ears on top of the actuator piston, as shown in figure 2. The combined load rating for these lifting ears is 28.7 kN (6,400 lbf) and should not be exceeded. A single hoist lift point on the strap or chain will balance and lift the actuator, keeping it level. - Page 5 Because some body/trim material combinations are limited in their pressure drop and temperature ranges, do not apply any other conditions to the valve without first contacting your Emerson sales office. WARNING Some bonnet flanges have tapped holes that were used to handle the bonnet during manufacture.
- Page 6 Shrink‐fit pieces and threaded connections might also loosen. In general, if post‐weld heat treating is needed, remove all trim parts. Contact your Emerson sales office for additional information. 5. Install the valve in the line. Use accepted piping and welding practices when installing the valve in the pipeline.
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Page 7: Mounting The Actuator On The Valve
Instruction Manual EHAT NPS 16x20 Valve D103600X012 September 2022 h. Now torque the packing bolts per step 24 of the Replacing High-Seal Packing Section. 12. After system flushing is completed, remove the bonnet (key 10), bonnet gasket (key 6), and flushing trim. 13. -
Page 8: Maintenance
Instruction Manual EHAT NPS 16x20 Valve September 2022 D103600X012 Maintenance Valve parts are subject to normal wear and must be inspected and replaced as necessary. Inspection and maintenance frequency depends on the severity of service conditions. This section includes instructions for packing maintenance and trim maintenance. -
Page 9: Packing Lubrication
Instruction Manual EHAT NPS 16x20 Valve D103600X012 September 2022 Figure 3. Procedure to Prevent Marring of Bonnet Nuts During Assembly HYDRAULIC TORQUE WRENCH REQUIRED SOCKET REACTION ARM EXTRA TOOLING TO PROTECT THE ADJACENT NUT X0644 Packing Lubrication Note No provisions for packing lubrication. WARNING Do not lubricate any parts or surfaces that may come into contact with the process media. -
Page 10: Replacing High-Seal Packing
Instruction Manual EHAT NPS 16x20 Valve September 2022 D103600X012 Replacing HIGH-SEAL Packing WARNING Refer to the WARNING at the beginning of the Maintenance section in this instruction manual. Key numbers referred to in this procedure are shown in figure 4 or 10, unless otherwise indicated. 1. - Page 11 Instruction Manual EHAT NPS 16x20 Valve D103600X012 September 2022 WARNING To avoid personal injury or property damage caused by uncontrolled movement of the bonnet (key 10), loosen the bonnet by following the instructions in the next step. Do not remove a stuck bonnet by pulling on it with equipment that can stretch or store energy in any other manner.
- Page 12 Instruction Manual EHAT NPS 16x20 Valve September 2022 D103600X012 ignored. Scratches or burrs that run across the serrations are not permitted under any conditions, since they will prevent the gaskets from sealing properly. 11. Clean all gasket seating surfaces; refer to your process or safety engineer for appropriate cleaning tools. Clean in the same direction as the surface serrations, not across them.
- Page 13 Personal injury or damage to equipment could occur if improper stud and nut materials or parts are used. Do not operate or assemble this product with stud(s) and nut(s) that are not approved by Emerson/Fisher engineering and/or listed on the serial card provided with this product.
- Page 14 Instruction Manual EHAT NPS 16x20 Valve September 2022 D103600X012 alternative way is to slide the packing follower (key 17) over the valve stem. Gently tap each soft packing part into the packing box one piece at a time, being sure that air is not trapped between adjacent soft parts. Note Be sure to install the packing rings in the sequence shown in figure 4.
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Page 15: Trim Removal
Instruction Manual EHAT NPS 16x20 Valve D103600X012 September 2022 NOTICE Keep the packing follower (key 17) and flange (key 9) centered on the valve stem (key 4). If any metal part makes contact with the stem, it can cause damage to the stem surface. Vertical scratches or nicks on the stem surface can cause excessive leakage from the packing. -
Page 16: Trim Replacement
Instruction Manual EHAT NPS 16x20 Valve September 2022 D103600X012 7. The seat ring is screwed into the cage and secured with two tack welds, one on each side of the cage. Remove the tack welds by grinding or filing them off. 8. - Page 17 Personal injury or damage to equipment could occur if improper stud and nut materials or parts are used. Do not operate or assemble this product with stud(s) and nut(s) that are not approved by Emerson/Fisher engineering and/or listed on the serial card provided with this product.
- Page 18 Instruction Manual EHAT NPS 16x20 Valve September 2022 D103600X012 10. Lubricate the stud threads and the faces of the hex nuts (key 8) with nuclear grade Never-Seez [key 27]. Install the washers (key 24) over the bonnet studs (key 7). Replace the hex nuts and tighten hand-tight. Torque the nuts in a crisscross pattern (as shown in figure 6) to no more than 1/4 of the nominal torque value specified in table 4.
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Page 19: Troubleshooting
Inspect plug and seat ring for indications of plug sticking in seat ring. Valve Won't Stroke Replace damaged parts as needed. Replace gaskets. Inspect actuator, refer to actuator instruction manual Other Contact your Emerson sales office if more assistance is needed. - Page 20 Instruction Manual EHAT NPS 16x20 Valve September 2022 D103600X012 Figure 10. NPS 16x20 EHAT Valve - Exploded View APPLY LUB GG16401-B...
- Page 21 Instruction Manual EHAT NPS 16x20 Valve D103600X012 September 2022 Figure 11. NPS 16x20 EHAT Valve - Section View E1544...
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Page 22: Parts Ordering
WARNING Use only genuine Fisher replacement parts. Components that are not supplied by Emerson should not, under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the performance of the valve, and could cause personal injury and property damage. -
Page 23: Parts List
Washer (Packing Stud) See following table Part numbers are shown for recommended spares only. For part 19 Indicator See following table numbers not shown, contact your Emerson sales office. 20 Belleville Spring See following table 21 Machine Screw (Load Scale) See following table 22... - Page 24 Ring, Key 11 following table Related during the expected life of the valve. Emerson degrade over recommends replacing this component every 6 time. years or as needed due to individual valve operation and performance.
- Page 25 Key 16 following table Related during the expected life of the valve. Emerson degrade over recommends replacing this component every 6 time years or as needed due to individual valve operation and performance.
- Page 26 Instruction Manual EHAT NPS 16x20 Valve D103600X012 September 2022 Table 8. Keys 9, 11*, 12*, 13*, 14, 15, 16*, 17, 18, 19, 20, 21, 22, and 34* Packing Components VALVE STEM SIZE PACKING COMPONENT QUANTITY PACKING STYLE NUMBER 31.75 mm (1-1/4-Inch) Packing Flange PTFE HIGH-SEAL 21B2199X012...
- Page 27 Instruction Manual EHAT NPS 16x20 Valve D103600X012 September 2022 Table 15. Key 4* Valve Plug/Stem Assemblies PORT TRAVEL STEM DIAMETER VALVE SIZE, DIAMETER DESCRIPTION PART NUMBER MATERIAL Inch Inch Inch 16x20 Balanced 8.875 31.75 1.25 GG13904X022 F6A/CoCr-A/S41000 Table 16. Anti-extrusion Seal Part Numbers PORT DIAMETER VALVE SIZE, NPS PART DESCRIPTION...
- Page 28 Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Fisher and Whisper Trim are marks 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.
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