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Fisher Control Valve Decoder

Paste a Fisher control valve tag and see every component resolved against the current Emerson bulletins. Bodies, actuators, FIELDVUE positioners, and 627 regulators decode together with assembly compatibility checks, source-cited fact groups, and a derived fail-action that respects both the body and the actuator.

A multi-component assembly decoder for Fisher control valves. Where the Rosemount 3051 decoder walks one ordering matrix, a Fisher tag is an assembly: a valve body model from one bulletin, an actuator model from another, a FIELDVUE digital valve controller from a third, and sometimes a 627 Series regulator from a fourth. Paste a free-form tag like "Fisher ET 667 DVC6200 NPS 4 CL300 WCC" and the tool tokenizes the string, matches each Fisher identifier against its current Emerson bulletin, attaches loose configuration hints (NPS sizes, ASME pressure classes, end connections, body materials, spring colors, HART) to the right component by kind, and reconciles each hint against the bulletin facts. Decoded components show their bulletin source citation per fact group, with inline citation overrides on facts that live on a different page than the group default. Fail action is derived only when both the valve plug action (from the body) and the actuator action (from the actuator) are present in the input. The decoder never collapses 657 to "fail open" without confirming the body plug action, because a 657 on a push-down-to-open EDR body fails closed, not open. V1 covers easy-e ED / EAD / EDR globe bodies, easy-e ET / EAT / ETR globe bodies (Class IV/V/VI shutoff), easy-e ES / EAS unbalanced globe bodies, easy-e EZ post-guided globe bodies, 657 direct-acting and 667 reverse-acting spring-and-diaphragm actuators in Size i (30i through 76i) and legacy sizes, the DVC6200 FIELDVUE digital valve controller (HART 5 and HART 7) plus DVC6205/DVC6215 remote-mount pair, and the 627 Series direct-operated pressure regulators across all 12 type variants from 627 through 627BMOSX. Built on the same triangulated audit methodology as the Rosemount 3051 decoder.

Pro Tip: The single most common mistake in Fisher CV planning is assuming the actuator alone determines fail action. The decoder will never make that mistake but the person ordering the replacement might. Always confirm the body variant first: ED, ET, ES, EZ, and their angle versions are push-down-to-close; EDR and ETR are push-down-to-open. A 657 (direct-acting, spring forces stem UP on air loss) plus a PDTC body fails open; the same 657 plus an EDR or ETR body fails closed. If a tag shows the actuator but not the body variant, treat the fail action as unknown until the body is on the spec sheet. The decoder surfaces this gap explicitly so it does not slip through.

Read the Fisher Control Valve Decoder Guide for the easy-e family map, fail-action matrix, and a worked example

Fisher Control Valve Decoder Guide →

Decode the Rosemount 3051 transmitter that sits on the same HART loop as the FIELDVUE positioner

Rosemount 3051 Decoder →

Size the required Cv for your fluid, flow, and pressure drop before specifying body size and trim

Control Valve Cv Calculator →

Verify the actuator can deliver the required seat-load thrust against the operating pressure drop

Valve Actuator Sizing Calculator →

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Fisher Control Valve Decoder
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How It Works

  1. Paste a Fisher Tag or Partial Assembly

    Type or paste a free-form tag in the input field. The decoder tokenizes on whitespace, slash, plus, comma, and pipe. Marketing words like "Fisher" and "FIELDVUE" pass through. Mixed case is fine. Fractional NPS sizes like NPS 1/2, NPS 3/4, and NPS 1-1/2 are preserved as single tokens. Decimal and fractional travel inputs (0.75, 3/4, 1-1/2) all reconcile against the bulletin via decimal-millimeter normalization with 0.5 mm tolerance.

  2. Read the Four-Card Assembly Grid

    Every decode renders four cards in this order: Valve Body, Actuator, Instrument / Positioner, Regulator. Each card is independently populated as components are recognized. Empty cards show a stub explaining what the user can add to complete the assembly. Matched cards highlight in the category accent color and surface the variant, the family display name, the confidence label, and every fact group the bulletin provides for that family.

  3. Walk the Per-Family Fact Groups

    Each component card lists fact groups exactly as the bulletin organizes them: body sizes, end connection styles, body materials, pressure classes, flow characteristics, port diameters and travels, flow directions, shutoff classifications, severe-service trims, packing arrangements, bonnet styles, and sour-service / NACE compatibility. Every fact group cites the bulletin page where the data lives. Facts that come from a different page than the group default carry an inline citation override in brackets, so the user can verify each value against the exact PDS page.

  4. Check the Derived Fail Action

    When both a body and an actuator are decoded, the derived facts section produces a fail action. The derivation reads the body plug action (PDTC for ED/EAD/ET/EAT/ES/EAS/EZ; PDTO for EDR/ETR) and combines it with the actuator action (657 direct-acting; 667 reverse-acting). The result is fail-open or fail-closed with page-level citations to both source bulletins. If only a body or only an actuator is decoded, the fact is preserved with status "requires_more_info" and lists what is missing.

  5. Verify the Configuration Hints

    Loose tokens like "NPS 4", "CL300", "WCC", "HART", "Green", "0.75 IN TRAVEL" are recorded as configuration hints attached to the right component by hint kind. Body-style hints (size, pressure class, end connection, material) route to the valve body first, then the regulator if no body is present. Spring color routes to the regulator first, then the actuator. Communication protocol routes to the instrument. Travel routes to the actuator first, then the body. Each hint is reconciled against the bulletin and labelled as "matches bulletin" (verified) or "not verified against bulletin" (recorded but not proven).

  6. Read the Verification Checklist

    Every decode surfaces a verification checklist tailored to the component classes that matched. A body decode adds items for pressure/temperature, trim style, shutoff class, NACE compliance, packing arrangement, and bonnet style. An actuator decode adds items for thrust adequacy and supply pressure consistency. An instrument decode adds items for hazardous-area approval, mounting kit, and HART version compatibility. A regulator decode adds items for outlet pressure range, body material vs service media, disk material vs inlet pressure, and internal-relief vs external-relief layout. The checklist describes what the bulletin requires the user to verify; it does NOT claim the decoded combination is suitable for the application.

  7. Walk the Field Notes

    Field notes capture caveats the bulletin language does not surface plainly. Each note is tagged with its source: bulletin (with page citation), standard (with the relevant ASME or NACE reference), or field-experience (uncited, drawn from practical install experience). Examples: C-seal trim is single-use and must be reordered for every maintenance cycle; ENVIRO-SEAL belleville washers must not be flattened during installation; cryogenic extension bonnets must be installed vertically; the magnet feedback assembly on DVC6200 must be aligned with the Fisher alignment tool or the Hall-effect sensor housing can be damaged.

  8. Export the Decoded Assembly

    Use the PDF export for a branded, page-break-safe report that includes every component card, every fact group, the derived fail action with both source citations, the verification checklist, and the field notes. Use the CSV export for spreadsheet import. Share the URL to send the exact same decode to a coworker without retyping the tag.

Built For

  • Maintenance planner reading a control-valve nameplate during a turnaround walk-down and confirming the body / actuator / positioner combination before ordering replacement trim
  • Reliability engineer auditing a recently-delivered ET assembly to verify the trim style, shutoff class, and Cavitrol III thermal limits match the spec for the duty service
  • Instrument tech replacing a DVC6000-series positioner with a DVC6200 and confirming the integral mount adapter pair works on the existing 667 Size i actuator
  • Project engineer reviewing a quote with mixed ED and EZ bodies and verifying the post-guide bushing material on the EZ matches the non-lubricating fluid the valve will see
  • Inspector evaluating a 627 regulator in natural-gas service and confirming the low-bleed variant is specified per EPA Quad Oa (40 CFR Part 60 Subpart OOOOa)
  • Plant operator decoding a Fisher tag from an old installation to figure out whether the WhisperFlo callout on the original spec is consistent with the current bulletin (NPS 4 and 6 ED only)
  • Foreman placing a phone order for a spare 657 actuator and reading off the tag to the Emerson rep, with the decoder confirming the size, diaphragm material, and integral-mount compatibility
  • Trainer onboarding a junior planner and walking them through how the body plug action combined with the actuator action determines fail action, using a worked EDR + 657 example

Features & Capabilities

Multi-Component Assembly Decoding

A Fisher tag is an assembly of separately-ordered components: valve body, actuator, instrument or positioner, and sometimes a regulator. The decoder reads loose user input and matches each component independently against its own Emerson bulletin. The four-card grid renders results component-by-component, so missing pieces are explicit instead of hidden inside a single model string.

Source-Cited On Every Fact Group

Every fact in every family file carries its bulletin and page citation. Fact groups display the citation under the group heading by default, and individual facts that live on a different page override with an inline bracketed citation tag. The ET Cavitrol III thermal-limit facts, for example, render with [51.1:ET D100022X012, p.10] even though the group default page is p.1-2. Every claim is traceable to a public Emerson bulletin page.

Derived Fail Action Joins Body and Actuator

Fail action is derived only when both the valve plug action and the actuator action are present in the input. The decoder never collapses 657 to "fail open" or 667 to "fail closed" without confirming the body plug action. The fail-action matrix: 657 (direct-acting, spring forces stem UP on air loss) plus a push-down-to-close body fails OPEN; 657 plus a push-down-to-open body (EDR or ETR) fails CLOSED; 667 (reverse-acting, spring forces stem DOWN) plus PDTC fails CLOSED; 667 plus PDTO fails OPEN. Page-level citations to both source bulletins accompany the derived fact.

Kind-Aware Hint Routing

Configuration hints are routed to the most-appropriate component by hint kind, not strictly to the most-recent component. Body-style hints (NPS size, ASME pressure class, end connection, body material) prefer the valve body over the regulator. Spring color prefers the regulator over the actuator. HART / FF / PROFIBUS goes to the instrument. Actuator Size i designations (40i, 60i, 70i) force actuator priority even when a body is also matched. Travel hints prefer the actuator first, then the body.

Decimal and Fraction Travel Equivalence

Travel inputs accept any of: integers (4), decimals (0.75, 1.125, 1.5), pure fractions (3/4, 1/2), mixed fractions (1-1/2, 1-1/8), and any unit variant (IN, INCH, INCHES, double-quote symbol, MM). All forms convert to a decimal-millimeter value and reconcile against the bulletin with 0.5 mm tolerance. So 0.75 in, 3/4 in, and 19.05 mm all match the bulletin's rounded 19 mm travel for the ED standard-cage NPS 1 row.

Variant-Specific Size Reconciliation

Body size envelopes are per-variant, not per-family. ET goes NPS 1 through 8 but EAT is NPS 1, 2, 3, 4, 6 only and ETR caps at NPS 4. ES includes NPS 1/2 and 3/4 and 1-1/4 while EAS does not. The size reconciler honors these distinctions, so EAS NPS 8 shows "not verified" even though ES NPS 8 is valid. The 627 regulator uses a combined "Body sizes and end connections" group whose label-stored sizes (NPS 1 / DN 25) are searched correctly.

Travel Reconciliation Excludes Stem-Yoke Dimensions

When a user enters a travel hint, the reconciler scans only fact-text segments that contain the literal word "travel" and matches only values that follow that keyword. Port diameters, stem diameters, and yoke-boss diameters in the same sentence are excluded by design. ED 1 IN TRAVEL no longer false-matches against the (1 in) stem dimension in Row I of Table 11; it shows "not verified" because Table 11 has no 1-inch ED travel.

Construction-Specific Hazardous-Area Approvals

The DVC6200 family entry surfaces every approval authority (CSA, FM, ATEX, IECEx) with the construction-specific caveat from the bulletin: "Approvals are construction-specific. Verify the exact approvals table against the order construction code." Scopes include intrinsically safe, explosion-proof, non-incendive, flameproof, dust ignition-proof, and Type n; the bulletin's page-5 approvals table is the source of truth for which combination applies to which construction.

Per-Variant Plug Action Citations

Each valve-body family exposes a plug-action source citation field so the derived fail-action fact carries an exact page reference per body family. ED cites p.3 Available Configurations; ET cites p.3; ES cites p.3; EZ cites p.1-3 with an inferred-from-figure-2 note explaining that the cited pages describe construction and flow direction but do not state "push-down-to-close" verbatim. The 657/667 action citation points at the Direct Action and Reverse Action paragraphs on bulletin 61.1:657 Size i p.3.

V1 Bulletin Coverage

Built from these current Emerson bulletins: 51.1:ED D100017X012 October 2023 for ED/EAD/EDR; 51.1:ET D100022X012 January 2025 for ET/EAT/ETR; 51.1:ES D100021X012 October 2023 for ES/EAS; 51.1:EZ D100025X012 October 2023 for EZ; 61.1:657 Size i D104018X012 April 2020 for 657/667 (with the September 2017 legacy bulletin D100087X012 cross-referenced for pre-Size-i sizes); 62.1:DVC6200 D103415X012 March 2023 and the Quick Start Guide D103556X012 November 2024 for the DVC6200 family; 71.1:627 D101331X012 January 2025 for the 627 Series.

PDF and CSV Export

PDF export uses the shared ToolGrit programmatic PDF generator. Decoded assemblies render across structured pages with no row mid-split, no orphan headings, and a branded header and disclaimer footer. The PDF includes every matched component, every fact group, the derived fail action, the verification checklist, and every field note. CSV export packages the same fields for spreadsheet import or SAP paste. Share-URL encoding lets a coworker open the exact same decode in their browser without retyping the tag.

Light and Dark Mode, Mobile-Friendly

Standard ToolGrit light and dark theme with WCAG AA contrast across status colors, callouts, and confidence pills. The four-card assembly grid collapses to a single column on mobile at 375 px viewport without horizontal scrolling. The plain-English summary is a screen-reader-friendly aria-live region so accessibility tools announce the decoded result when the input changes.

Comparison

Component class V1 families covered Source bulletins Decode complexity
Valve body easy-e ED / EAD / EDR (balanced cage-guided globe; ED/EAD PDTC, EDR PDTO); easy-e ET / EAT / ETR (balanced cage-guided globe with PTFE seating, Class IV/V/VI; ETR PDTO); easy-e ES / EAS (cage-guided unbalanced globe, PDTC); easy-e EZ (post-guided unbalanced globe for hard-to-handle fluids, PDTC) 51.1:ED D100017X012 Oct 2023; 51.1:ET D100022X012 Jan 2025; 51.1:ES D100021X012 Oct 2023; 51.1:EZ D100025X012 Oct 2023 Medium - per-family fact groups, variant-specific size envelopes, Cavitrol III thermal limits, WhisperFlo NPS-4-and-6-ED-only callout
Actuator 657 direct-acting spring-and-diaphragm (Size i 30i-70i plus legacy 30-100); 657-4 4-inch travel; 667 reverse-acting (Size i 30i-76i plus legacy); 667-4 4-inch travel 61.1:657 Size i D104018X012 Apr 2020; legacy 61.1 D100087X012 Sep 2017 Medium - integral DVC2000/DVC6200 mounting pad on Size i, low-ambient construction caveat, SIL3 certification scope
Instrument DVC6200 FIELDVUE digital valve controller (HART 5 or HART 7); DVC6205 remote-mount base; DVC6215 remote-mount feedback; FIELDVUE generic alias resolves to DVC6200 62.1:DVC6200 D103415X012 Mar 2023; QSG D103556X012 Nov 2024 Medium - construction-specific hazardous-area approvals (CSA, FM, ATEX, IECEx), linkage-less magnet alignment caveat, supply pressure limits
Regulator 627 Series 12 variants from 627 (base) through 627BMOSX (balanced trim, stem seal, OSE slam-shut) 71.1 627 Series D101331X012 Jan 2025 Small - 12 variant types, NPT and flanged end connections, spring color outlet pressure ranges, EPA Quad Oa low-bleed callout for natural-gas service

References

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Frequently Asked Questions

Because the answer depends on the body. A 657 actuator is direct-acting and forces the stem UPWARD on air loss. On a push-down-to-close body (ED, EAD, ET, EAT, ES, EAS, EZ), stem-up means the valve OPENS, so the assembly fails open. On a push-down-to-open body (EDR, ETR), stem-up means the valve CLOSES, so the same 657 fails CLOSED. A 667 is reverse-acting and forces the stem DOWNWARD on air loss, which flips the table the other way. The decoder will tell you the actuator action and ask for the body plug action; it will not collapse the answer to a hardcoded value, because that is the single fastest way to install a CV with the wrong fail direction.
The kind-aware router places Size i designations on the actuator because the i suffix is a 657/667 Size i bulletin convention. So if you type ET 667 size 40i, the 40i hint attaches to the 667 actuator, not to the ET body. If you only type 657 size 40i with no body, the 40i still attaches to the 657. The decoder surfaces this routing visibly so it does not have to be guessed.
The tokenizer preserves slashes that sit between two digits (1/2, 3/4, 1-1/2). Slashes elsewhere (Fisher ET / 667, EZ/627) still split tokens because at least one side is a letter or a separator. The size reconciler then accepts fractional and mixed-fraction NPS values and reconciles against the bulletin's list, which for EZ is NPS 1/2, 3/4, 1, 1-1/2, 2, 3, 4 per the EZ bulletin page 3.
ED Table 11 does not list a 4-inch valve plug travel. The travels for ED are 19 mm (3/4 in), 29 mm (1-1/8 in), 38 mm (1-1/2 in), 51 mm (2 in), and 76 mm (3 in). The "4 in" you might see in the body fact text is a stem or yoke-boss dimension, not a travel value. The reconciler explicitly excludes stem and yoke dimensions by anchoring on the literal word "travel" in the bulletin text. ED 3-inch travel does match because the WhisperFlo rows in Row H and Row I list 76 mm = 3 in.
The DVC6200 SIS bulletin is not yet in the V1 source set. The base DVC6200 is recognized and decoded; SIS is treated as an unknown token. Once the SIS-specific bulletin (62.1:DVC6200 SIS) is cached and the parser is taught to accept a two-token identifier, DVC6200 SIS will resolve to its own subfamily. For now, the conservative behavior is to flag SIS as unknown rather than claim approvals the bulletin does not support.
The Emerson configurator builds new orders against the current bulletin and requires the user to know which family to enter before they start. The ToolGrit decoder reads a finished tag (current or partial, with loose tokens, in mixed case, possibly with marketing words mixed in) and tells the user what it means in plain English with bulletin page citations. It surfaces field-experience caveats the bulletin does not print, runs the fail-action derivation that depends on combining body and actuator data, and routes loose configuration hints to the right component by kind. It is a maintenance and planning helper, not a substitute for ordering through Emerson. Every decode carries the disclaimer "Verify critical orders with Emerson before purchase."
The 627 family entry calls out the standard-bleed vs low-bleed distinction in the field notes and surfaces EPA Quad Oa (40 CFR Part 60 Subpart OOOOa) as a regulatory consideration for new natural-gas regulator installations. Standard-bleed 627 regulators bleed gas continuously to the atmosphere; that bleed is not compliant for new natural-gas sources under Quad Oa. The decoder will not refuse a standard-bleed 627; it will flag the bleed style and the service context in the field notes so the user makes the choice deliberately.

Learn More

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Fisher Control Valve Decoder Guide: Bodies, Actuators, FIELDVUE, and 627 Regulators

How to read a Fisher control valve assembly tag across body, actuator, positioner, and regulator. Covers the easy-e family map, fail-action derivation, shutoff classes by trim style, NACE compliance, ENVIRO-SEAL packing, DVC6200 construction-specific approvals, and the 627 Series regulator portfolio. Companion to the Fisher Control Valve Decoder.

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