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General| Brand | Fisher |
|---|---|
| Model | 461 |
| Category | Control Unit |
| Language | English |
Details the manual's scope including installation, maintenance, and parts information for the 461 valve.
Explains the 461 valve's features, including its self-cleaning, increased-outlet, angle design and industrial applications.
Lists valve sizes, shutoff classification per ANSI/FCI 70-2 and IEC 60534-4, and flow characteristics.
Provides contact details for courses on Fisher 461 valves and other products.
Emphasizes wearing protective gear and checking for process media hazards to prevent injury or damage.
Outlines steps for inspecting pipelines, orienting the valve body, and connecting the actuator.
Details precautions to avoid injury during maintenance, like depressurizing and using lock-out procedures.
States that inspection and replacement frequency depends on the severity of service conditions.
Advises against lubricating packing at elevated temperatures over 260°C (500°F) to prevent breakdown.
Warns against lubricating in oxygen service due to explosion risk from oil/oxygen mixture.
Explains how to tighten packing flange nuts to address leakage and ensure a stem seal.
Refers to detailed steps for replacing worn or leaking packing components.
Details steps to add packing rings as a temporary measure without removing the actuator.
Outlines steps for disassembling the valve to access and replace packing components.
Safety precautions for bonnet removal, stem handling, and general packing replacement operations.
Details the process of safely removing the valve bonnet from the valve body.
Describes how to remove residual packing parts from the bonnet using appropriate tools.
Instructions for cleaning the packing box and smoothing valve stem threads before reassembly.
Details installing the bonnet, tightening nuts, and ensuring proper alignment.
Explains the step-by-step procedure for tightening nuts to specified torque values in a crisscross pattern.
Provides recommended torque values for graphite type packing flange nuts based on valve size and pressure rating.
Details steps to remove the actuator, bonnet, and valve plug/stem assembly for trim replacement.
Safety warnings regarding the use of old stems and ensuring proper pin hole drilling.
Lists recommended torque values for PTFE type packing flange nuts.
Describes how to remove the valve liner and inspect/remove the seat ring for replacement.
Instructions for preparing sealing surfaces and installing the seat ring and bonnet gasket.
Details mounting the bonnet and initial nut tightening to ensure a positive seal.
Safety caution to avoid damaging packing during bonnet installation.
Provides recommended torque values for valve body to bonnet nuts based on size and pressure rating.
Explains how to lap valve seating surfaces using compound to improve shutoff.
Warns against using non-genuine Fisher replacement parts to avoid warranty issues and potential damage.
Lists all valve components with their corresponding key numbers and descriptions for ordering.
Lists actuator types compatible with the 90 mm (3-9/16 Inch) Yoke Boss.
Lists actuator types compatible with the 127 mm (5 Inch) Yoke Boss.
Lists actuator types compatible with the 127 mm (5 Inch) Yoke Boss.
