# Printable tri-clamp (45°): butterfly valve body halves

> Can I 3D print a tri-clamp butterfly valve without supports?

- Category: Hardware › Printable tri-clamp
- Kind: Hardware
- Basis: Xem Studio design: the printable butterfly valve with 45° rims; seat, disc, stem and lever are the same parts as tri-clamp-butterfly-valves
- Page: https://xemstudio.com/objects/printable-tri-clamp-butterfly-valves/ · JSON: https://xemstudio.com/api/geometry?object=printable-tri-clamp-butterfly-valves · Plain text: https://xemstudio.com/objects/printable-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

- Body halves print split face down; take the seat, disc, stem and lever from the butterfly valve page.
- Printable tri-clamp: the ISO 2852 face and gasket groove are exactly standard, only the back cone behind each rim is 45° instead of 20°, so no rim overhangs more than 45° from vertical in any print orientation. Join these with the 45° clamps (printable-tri-clamp-clamps) and standard Type B gaskets; a 45° clamp fits only 45° rims, so keep a run all 45°. A 45° cone turns clamp force into face force at 1 : 1 (a 20° cone at 2.7 : 1), so tighten the clamp bolts harder or use M6.
- Print orientation: straight parts face down; elbows, tees and crosses with one face down; horizontal bores bridge their top, so keep them small or add a light tree support inside.
- 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 |
|---|---|
| 1.5 | 44.0 |
| 2 | 44.0 |
| 2.5 | 44.0 |
| 3 | 44.0 |
| 4 | 44.0 |

## 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 (5 parts, CC BY 4.0, Xem Studio)

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

- butterfly-body-half-45cone-1.5in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-butterfly-valves/butterfly-body-half-45cone-1.5in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-butterfly-valves/butterfly-body-half-45cone-1.5in.stl) — 1.5 in body half, 45° rim (two per valve)
- butterfly-body-half-45cone-2in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-butterfly-valves/butterfly-body-half-45cone-2in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-butterfly-valves/butterfly-body-half-45cone-2in.stl) — 2 in body half, 45° rim (two per valve)
- butterfly-body-half-45cone-2.5in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-butterfly-valves/butterfly-body-half-45cone-2.5in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-butterfly-valves/butterfly-body-half-45cone-2.5in.stl) — 2.5 in body half, 45° rim (two per valve)
- butterfly-body-half-45cone-3in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-butterfly-valves/butterfly-body-half-45cone-3in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-butterfly-valves/butterfly-body-half-45cone-3in.stl) — 3 in body half, 45° rim (two per valve)
- butterfly-body-half-45cone-4in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-butterfly-valves/butterfly-body-half-45cone-4in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-butterfly-valves/butterfly-body-half-45cone-4in.stl) — 4 in body half, 45° rim (two per valve)

## Questions

**Other parts?**

Seat, disc, stem and lever: tri-clamp-butterfly-valves.

## Fits with

- [Printable tri-clamp (45°): ferrules, spools and caps, ½ to 4 in](https://xemstudio.com/objects/tri-clamp-45-degree-printable/)
- [Printable tri-clamp (45°): two-bolt clamps, ½ to 8 in](https://xemstudio.com/objects/printable-tri-clamp-clamps/)
- [Printable tri-clamp (45°): 90° and 45° elbows, ½ to 4 in](https://xemstudio.com/objects/printable-tri-clamp-elbows/)
- [Printable tri-clamp (45°): tees, short-outlet tees and crosses, ½ to 4 in](https://xemstudio.com/objects/printable-tri-clamp-tees-crosses/)
- [Printable tri-clamp (45°): concentric and eccentric reducers, ½ to 4 in](https://xemstudio.com/objects/printable-tri-clamp-reducers/)
- [Printable tri-clamp (45°): NPT male, NPT female and hose-barb adapters](https://xemstudio.com/objects/printable-tri-clamp-adapters/)
- [Tri-clamp butterfly valves, printable: 1½ to 4 in](https://xemstudio.com/objects/tri-clamp-butterfly-valves/)