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Fisher® HPNS Control Valve

Fisher® HPNS Control Valve
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Instruction Manual HPNS Valve Fisherr HPNS Control Valve Contents Figure 1. HPNS Valve with 667NS2 Actuator Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Educational Services . . . . . . . . . . . . . . . . . . . . . . . . . 2 Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . 4 Lifting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Bonnet Nut Torquing Considerations . . . . . . . . . . . 8 Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 9 Replacing Conventional Packing . . . . . . . . . . . . 9 Replacing HIGH-SEAL Packing . . . . . . . . . . . . . 14 Trim Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Standard Balanced and Unbalanced Trim Removal . . . . . . . . . . . . . . . . . . . . . . . . 16 Bore Seal Trim Removal . . . . . . . . . . . . . . . . . . 16 Trim Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Installing Bore Seal Trim . . . . . . . . . . . . . . . . . . . . . 20 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Introduction Scope of Manual This instruction manual includes installation, maintenance, and parts information for NPS 1/2 through NPS 8 HPNS valves with CL900 through CL2075 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 HPNS 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 Process Management sales office before proceeding. Description HPNS valves (figure 1) have buttweld end connections in various schedules and are designed for use with Fisher 667NS2 and 657NS2 actuators. HPNS valves are designed to handle high seismic environments. Specifications Specifications for the HPNS valves are shown in table 1.

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Instruction Manual HPNS Valve Table 1. Specifications End Connection Styles and Ratings(1,2) Buttwelding: Consistent with Schedule 40-160 Flow Direction Standard Cage J HPNS Balanced: Normally flow up J HPNS Unbalanced: Normally flow down or up(3) Socket Welding: Not available Cavitrol III Cage: Flow down Whisper Trim III Cage: Flow up Approximate Weights (valve body and bonnet assemblies) Shutoff Classifications See table 3 Bidirectional Trim: Class V. See table 4 Bore Seal trim: High-temperature, Class IV and V. See table 4 See table 2 Bolt Torque Tolerance Torque values given are +/- 5%,...

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Instruction Manual HPNS Valve Table 2. Valve Assembly Approximate Weights VALVE SIZE, NPS PRESSURE RATING Table 3. Shutoff Classifications per ANSI/FCI 70-2 and IEC 60534-4 PORT DIAMETER, mm (INCHES) TRIM STYLE LEAKAGE CLASS VALVE DESIGN Unbalanced HPNS 1. Data Sheet Number refers to PV14 Data Sheets for the AP1000 Power Plant Design. Table 4. Additional Shutoff Classification per ANSI/FCI 70-2 and IEC 60534-4 VALVE DESIGN PORT DIAMETER, mm (INCHES) CAGE STYLE Linear (Whisper III, C3) Modified Equal % LEAKAGE CLASS 1. Data Sheet Number refers to PV14 Data Sheets and PV69 Data Sheets for the...

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Instruction Manual HPNS Valve Table 5. Recommended Torque for Packing Flange Nuts (non live-loaded) TORQUE 115 1. Data Sheet Number refers to PV14 Data Sheets for the AP1000 Power Plant Design. Table 6. Torque for Body-to-Bonnet Bolting Using Nuclear Grade Never-Seezr Lubricant TORQUE Principle of Operation HPNS valves are control valves based on the Fisher HP valve product. The valve body and bonnet contain a fluid under pressure, while the internal valve parts control the flow of the fluid through the valve. The internal parts consist of gaskets, a seat ring, a plugstem assembly, and a...

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HPNS Valve July 2014 Lifting Guidelines CAUTION Loads must be applied only in the plane of the eye. If the plane of the eyebolt is not aligned with the load, estimate the amount of unthreading necessary to properly align the eye. Remove the eyebolt and add shims to adjust the angle of the plane of the eye. The load should never be applied at more than a 45 degree angle from the bolt centerline. Refer to eyebolt manufacturer's instruction manual for further details. The quantity of eyebolts for lifting purpose is the minimum recommendation. More eyebolts can be used per customer experience....

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HPNS Valve Instruction Manual Installation WARNING Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal injury. Personal injury or equipment damage caused by sudden release of pressure may result if the valve assembly is installed where service conditions could exceed the limits given in table 1 or on the appropriate nameplates. To avoid such injury or damage, provide a relief valve for over-pressure protection as required by government or accepted industry codes and good engineering practices. Check with your process or safety...

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Instruction Manual HPNS Valve 3. Flow through the valve must be in the direction indicated by the flow arrow, which is stamped on or attached to the valve body. CAUTION Depending on valve body materials used, post-weld heat treating might be needed. Post-weld heat treatment can damage internal elastomeric, plastic, and metal parts. 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 Process Management sales office for additional information. 4. Use accepted piping and welding practices...

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