Tri-clamp gland caps, 2 in: end caps with a rod gland, an M5 port and a stop bridge or bell-crank post — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/tri-clamp-rd-gland-caps/  (CC BY 4.0)
Basis: ISO 2852 face, recess and 20° back cone as the flat end cap on this site; pedestal clear of the 2 in clamp; rod, bushing and port sizes are design values
Catalog version: 2026-10-20

Sizes: see table below
- A 2 in end cap with the rod's gland on its back. It closes the top of the run of a standard 2 in equal tee with a Type B gasket and a 2 in clamp, like any end cap; a Ø50.8 pedestal lifts everything on its back clear of the clamp.
- Ringbom cap: the Ø8 rod runs in an 8 × 12 × 20 bushing at the top of a Ø36 boss; an 8 mm collar on the rod stops on the boss top and under a bridge 26 mm up, so the free displacer travels 18 mm.
- Gamma cap: the Ø3 displacer rod runs in two 3 × 5 × 6 bushings, one at each end of the gland; a post on a Ø64 platform carries the bell crank's pivot 89.5 mm above the face.
- Both caps have an M5 tapped port from the pedestal into the cap's recess: a plug, a gauge, or a one-way valve that lets air in when the gas falls below air pressure (it keeps the rolling diaphragm the right way round).

part  top_mm  rod  gland
ringbom  30.0  Ø8  8 × 12 × 20
gamma  22.0  Ø3  2 × 3 × 5 × 6

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- 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
- 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
- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/tri-clamp-rd-gland-caps/index.json
API: https://xemstudio.com/api/geometry?object=tri-clamp-rd-gland-caps