Sanitary clamp reducers, concentric and eccentric, ½ to 4 in (tri-clamp style, BPE) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/sanitary-clamp-reducers/  (CC BY 4.0)
Basis: ASME BPE / 3-A clamp-fitting dimensions published identically by two manufacturers; ISO 2852 face profile; drawn by Xem Studio from those numbers
Catalog version: 2026-10-20

Sizes: see table below
- Concentric (31-14MP) and eccentric (32-14MP) reducers with clamp faces both ends; 0.5 in of straight tube behind each face, then the cone. Eccentric reducers keep one side flat (drawn on −X): lay it flat side down so a line drains.
- Only the size pairs and lengths that both source catalogues list identically are drawn.
- Faces: ISO 2852 profile (2.85 mm rim, 1.6 mm gasket recess, 20° back cone) on the BPE flange diameters ½–¾ in 25.0, 1–1½ in 50.5, 2 in 64.0, 2½ in 77.5, 3 in 91.0, 4 in 119.0 mm; tube OD 12.7 / 19.05 / 25.4 / 38.1 / 50.8 / 63.5 / 76.2 / 101.6 mm, wall 1.65 mm (4 in: 2.11). The gasket-groove diameter on ½, ¾ and 4 in is derived (flange − 7.0 / 7.5 mm, the land width of every size ISO 2852 lists); the rest is from the standard.

size_in  face_to_face_mm  large_tube_od_mm  small_tube_od_mm
¾ × ½  50.8  19.05  12.7
1 × ¾  50.8  25.4  19.05
1½ × 1  76.2  38.1  25.4
2 × 1  127.0  50.8  25.4
2 × 1½  76.2  50.8  38.1
2½ × 1½  127.0  63.5  38.1
2½ × 2  76.2  63.5  50.8
3 × 1½  177.8  76.2  38.1
3 × 2  127.0  76.2  50.8
3 × 2½  76.2  76.2  63.5
4 × 2  231.8  101.6  50.8
4 × 2½  181.0  101.6  63.5
4 × 3  130.2  101.6  76.2

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- ASME: BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall) — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment
- ISO (via iTeh sample): ISO 2852 clamp liners: face profile and flange / groove diameters — PDF — standard excerpt; dimensions are facts — https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf
- Dixon Sanitary: Clamp elbows, ferrules: dimension sheet — PDF — publisher's catalogue; dimensions cited, nothing copied — https://dixonvalve.com/en/media/1397776
- Steel & O'Brien: Sanitary products catalog 2024 (clamp fittings dimension tables) — PDF — publisher's catalogue; dimensions cited, nothing copied — https://www.steelobrien.com/wp-content/uploads/2024/03/Sanitary-2024-FINAL.pdf

Free files (CC BY 4.0, Xem Studio; STEP + STL, 26 parts): https://xemstudio.com/files/hardware/sanitary-clamp-reducers/index.json
API: https://xemstudio.com/api/geometry?object=sanitary-clamp-reducers