# Tri-clamp butterfly valves, printable: 1½ to 4 in

> Can I 3D print a tri-clamp butterfly valve?

- Category: Hardware › Sanitary clamp fittings
- Kind: Hardware
- Basis: Xem Studio design: two bolted body halves with ISO 2852 clamp faces, a flexible seat ring clamped between them, a full-bore disc on a Ø6 D-flat stem, a lever
- Page: https://xemstudio.com/objects/tri-clamp-butterfly-valves/ · JSON: https://xemstudio.com/api/geometry?object=tri-clamp-butterfly-valves · Plain text: https://xemstudio.com/objects/tri-clamp-butterfly-valves/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Face to face 44 mm for every size: each half is the clamp face and its 14 mm neck (room for the clamp) plus an 8 mm body; the seat ring sits in counterbores in both halves.
- The disc is drawn at the bore; it seals by squeezing the flexible seat. Quarter turn: lever along the line is open.
- Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40.

## Sizes

| size_in | face_to_face_mm | body_od_mm | bore_mm | bolts |
|---|---|---|---|---|
| 1.5 | 44.0 | 74.5 | 34.8 | 4 × M5 |
| 2 | 44.0 | 88.0 | 47.5 | 4 × M5 |
| 2.5 | 44.0 | 101.5 | 60.2 | 4 × M5 |
| 3 | 44.0 | 115.0 | 72.9 | 4 × M5 |
| 4 | 44.0 | 143.0 | 97.38 | 4 × M5 |

## Where the files are

- GW Kent: [Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness](https://www.gwkent.com/triclamp-guide) — web — publisher's guide; dimensions cited
- Rubber Fab: [Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50)](https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf) — PDF — maker chart; dimensions are facts (verify at link)

## Free STEP/STL (25 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/index.json

- butterfly-body-half-1.5in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-body-half-1.5in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-body-half-1.5in.stl) — 1.5 in body half (two per valve): clamp face, Ø74 body, seat counterbore, half the Ø6.4 stem bore, four M5 holes on r 31.2
- butterfly-seat-1.5in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-seat-1.5in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-seat-1.5in.stl) — 1.5 in seat ring Ø46.8 × Ø34.80 × 3 with the stem holes (flexible material)
- butterfly-disc-1.5in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-disc-1.5in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-disc-1.5in.stl) — 1.5 in disc Ø34.80 (= the bore) × 4 on a D-flat Ø6 stem bore
- butterfly-stem-1.5in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-stem-1.5in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-stem-1.5in.stl) — 1.5 in stem Ø6 × 114 with a 1.0 D-flat
- butterfly-handle-1.5in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-handle-1.5in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-handle-1.5in.stl) — 1.5 in lever 119 long with a D-flat bore
- butterfly-body-half-2in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-body-half-2in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-body-half-2in.stl) — 2 in body half (two per valve): clamp face, Ø88 body, seat counterbore, half the Ø6.4 stem bore, four M5 holes on r 38.0
- butterfly-seat-2in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-seat-2in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-seat-2in.stl) — 2 in seat ring Ø59.5 × Ø47.50 × 3 with the stem holes (flexible material)
- butterfly-disc-2in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-disc-2in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-disc-2in.stl) — 2 in disc Ø47.50 (= the bore) × 4 on a D-flat Ø6 stem bore
- butterfly-stem-2in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-stem-2in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-stem-2in.stl) — 2 in stem Ø6 × 128 with a 1.0 D-flat
- butterfly-handle-2in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-handle-2in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-handle-2in.stl) — 2 in lever 141 long with a D-flat bore
- butterfly-body-half-2.5in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-body-half-2.5in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-body-half-2.5in.stl) — 2.5 in body half (two per valve): clamp face, Ø102 body, seat counterbore, half the Ø6.4 stem bore, four M5 holes on r 44.8
- butterfly-seat-2.5in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-seat-2.5in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-seat-2.5in.stl) — 2.5 in seat ring Ø72.2 × Ø60.20 × 3 with the stem holes (flexible material)
- butterfly-disc-2.5in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-disc-2.5in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-disc-2.5in.stl) — 2.5 in disc Ø60.20 (= the bore) × 6 on a D-flat Ø6 stem bore
- butterfly-stem-2.5in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-stem-2.5in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-stem-2.5in.stl) — 2.5 in stem Ø6 × 142 with a 1.0 D-flat
- butterfly-handle-2.5in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-handle-2.5in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-handle-2.5in.stl) — 2.5 in lever 162 long with a D-flat bore
- butterfly-body-half-3in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-body-half-3in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-body-half-3in.stl) — 3 in body half (two per valve): clamp face, Ø115 body, seat counterbore, half the Ø6.4 stem bore, four M5 holes on r 51.5
- butterfly-seat-3in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-seat-3in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-seat-3in.stl) — 3 in seat ring Ø84.9 × Ø72.90 × 3 with the stem holes (flexible material)
- butterfly-disc-3in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-disc-3in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-disc-3in.stl) — 3 in disc Ø72.90 (= the bore) × 6 on a D-flat Ø6 stem bore
- butterfly-stem-3in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-stem-3in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-stem-3in.stl) — 3 in stem Ø6 × 155 with a 1.0 D-flat
- butterfly-handle-3in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-handle-3in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-handle-3in.stl) — 3 in lever 184 long with a D-flat bore
- butterfly-body-half-4in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-body-half-4in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-body-half-4in.stl) — 4 in body half (two per valve): clamp face, Ø143 body, seat counterbore, half the Ø6.4 stem bore, four M5 holes on r 65.5
- butterfly-seat-4in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-seat-4in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-seat-4in.stl) — 4 in seat ring Ø109.4 × Ø97.38 × 3 with the stem holes (flexible material)
- butterfly-disc-4in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-disc-4in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-disc-4in.stl) — 4 in disc Ø97.38 (= the bore) × 6 on a D-flat Ø6 stem bore
- butterfly-stem-4in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-stem-4in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-stem-4in.stl) — 4 in stem Ø6 × 183 with a 1.0 D-flat
- butterfly-handle-4in: [STEP](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-handle-4in.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-butterfly-valves/butterfly-handle-4in.stl) — 4 in lever 229 long with a D-flat bore

## Questions

**What holds it together?**

Four M5 bolts through both body halves; the clamp faces then go into the line with standard clamps and gaskets.

## Fits with

- [Tri-clamp × hose barb adapters (14MPHR style): ½ to 4 in clamp, ¼ to 4 in hose](https://xemstudio.com/objects/tri-clamp-hose-barb-adapters/)
- [Tri-clamp vessels with a dished or round welded bottom: 4, 6 and 8 in, 12 to 24 in deep](https://xemstudio.com/objects/tri-clamp-dished-bottom-vessels/)