Matching an actuator or gearbox to a valve always ends at the flange — the F07, F10, F14, F16, F25, F30, F35, F40, F48 and F60 codes of ISO 5210/5211 (valve actuator mountings), each pinned to a fixed set of dimensions: flange diameter ød1, bolt circle ød2, spigot ød3, thread spec and bolt count. This page carries the complete F03–F60 table (14 codes) for sizing, drawing and field checks — bookmark it and stop digging through the standard.
| Code | ød1 (flange dia.) mm | ød2 (bolt circle) mm | ød3 (spigot) mm | ød4 (thread) | h1 max mm | h2 max mm | Bolts |
|---|---|---|---|---|---|---|---|
| F03 | 46 | 25 | 36 | M5 | 3 | 8 | 4 |
| F04 | 54 | 30 | 42 | M5 | 3 | 8 | 4 |
| F05 | 65 | 35 | 50 | M6 | 3 | 9 | 4 |
| F07 | 90 | 55 | 70 | M8 | 3 | 12 | 4 |
| F10 | 125 | 70 | 102 | M10 | 3 | 15 | 4 |
| F12 | 150 | 85 | 125 | M12 | 3 | 18 | 4 |
| F14 | 175 | 100 | 140 | M16 | 4 | 24 | 4 |
| F16 | 210 | 130 | 165 | M20 | 5 | 30 | 4 |
| F25 | 300 | 200 | 254 | M16 | 5 | 24 | 8 |
| F30 | 350 | 230 | 298 | M20 | 5 | 30 | 8 |
| F35 | 415 | 260 | 356 | M30 | 5 | 45 | 8 |
| F40 | 475 | 300 | 406 | M36 | 8 | 54 | 8 |
| F48 | 560 | 370 | 483 | M36 | 8 | 54 | 12 |
| F60 | 686 | 470 | 603 | M36 | 8 | 54 | 20 |
Notes: h1 = max spigot height, h2 = max flange thickness; holes are threaded (not through), standard coarse pitch.
Bolting a gearbox to an actuator means matching actuator output flange = gearbox input flange: identical codes align holes and spigot perfectly. Typical actuator outputs: F07 (small), F10/F14 (medium), F16/F25 (large). Our input coverage: GS F07–F30, IW F10–F25, GK/BST F10–F30, LE F10–F16 — every major actuator brand has its step.
Gearbox output matches the valve flange: F10–F16 for small/mid butterflies and balls, F25–F35 for large bores, F40–F60 for very large and heavy valves. Non-standard flange faces (legacy valves) switch to the bracket + linkage scheme (GF bracket-type with QJ ball hinges).
No drawing? Three caliper readings reverse the code: flange diameter ød1 (most direct), diagonal bolt-hole center distance (gives ød2), spigot diameter ød3. Match all three against the table and the code is pinned.
Q: My actuator outputs F10 and the valve takes F14 — can they work?
A: Yes — that's precisely what a gearbox bridges: input F10 (to the actuator), output F14 (to the valve). Our standard/optional output combinations exist for this (e.g. GS100.3: input F14, output F16 std / F14 opt).
Q: How do codes relate to torque?
A: Bigger codes carry more. Rule of thumb: F07–F10 up to ~2,000 N·m; F14–F16 to the 10,000 N·m class; F25–F35 for 10,000–80,000 N·m; F40+ for 100,000 N·m-class heavy duty — always confirm against each series' selection table.
Q: Through holes or threaded?
A: Threaded per the standard (M specs in the table); if your plant standardizes through-bolted flanges, custom drilling can be arranged.
The full version (per-series input/output flange mapping and dimension drawings) is in the Gearbox Product Data (CN/EN PDFs). Flange questions or custom flanges? Submit an RFQ with your measured dimensions and we'll match them.
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