{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "tri-clamp-orifice-plate-gaskets",
 "name": "Tri-clamp orifice-plate gaskets: 1½ to 4 in, holes at 25, 50 and 75 % of the bore",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Sanitary clamp fittings",
 "year": null,
 "question": "What is a tri-clamp orifice plate gasket?",
 "tags": [
  "orifice",
  "restrictor",
  "flow",
  "sanitary",
  "tri-clamp",
  "clamp fitting",
  "brewing",
  "homebrew"
 ],
 "aliases": [
  "tri clamp orifice plate",
  "tri clamp restrictor gasket",
  "orifice gasket"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 12,
 "url": "https://xemstudio.com/objects/tri-clamp-orifice-plate-gaskets/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-orifice-plate-gaskets/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design: the ISO 2852 Type B gasket with a 1.5 mm plate across the bore and one centre hole",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Restricts flow at a joint: slows a drain, sets a flow for a chiller or a sparge, or makes a crude flow meter. Hole sizes are 25, 50 and 75 % of the bore.",
   "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."
  ],
  "table": {
   "columns": [
    "size_in",
    "bore_mm",
    "hole_mm"
   ],
   "rows": [
    [
     "1.5",
     34.8,
     8.7
    ],
    [
     "1.5",
     34.8,
     17.4
    ],
    [
     "1.5",
     34.8,
     26.1
    ],
    [
     "2",
     47.5,
     11.9
    ],
    [
     "2",
     47.5,
     23.8
    ],
    [
     "2",
     47.5,
     35.6
    ],
    [
     "3",
     72.9,
     18.2
    ],
    [
     "3",
     72.9,
     36.5
    ],
    [
     "3",
     72.9,
     54.7
    ],
    [
     "4",
     97.38,
     24.3
    ],
    [
     "4",
     97.38,
     48.7
    ],
    [
     "4",
     97.38,
     73
    ]
   ]
  }
 },
 "sheet_text": "Tri-clamp orifice-plate gaskets: 1½ to 4 in, holes at 25, 50 and 75 % of the bore — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-orifice-plate-gaskets/  (CC BY 4.0)\nBasis: Xem Studio design: the ISO 2852 Type B gasket with a 1.5 mm plate across the bore and one centre hole\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Restricts flow at a joint: slows a drain, sets a flow for a chiller or a sparge, or makes a crude flow meter. Hole sizes are 25, 50 and 75 % of the bore.\n- 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.\n\nsize_in  bore_mm  hole_mm\n1.5  34.8  8.7\n1.5  34.8  17.4\n1.5  34.8  26.1\n2  47.5  11.9\n2  47.5  23.8\n2  47.5  35.6\n3  72.9  18.2\n3  72.9  36.5\n3  72.9  54.7\n4  97.38  24.3\n4  97.38  48.7\n4  97.38  73.0\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- GW Kent: Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness — web — publisher's guide; dimensions cited — https://www.gwkent.com/triclamp-guide\n- 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) — PDF — maker chart; dimensions are facts [verify license at link] — https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 12 parts): https://xemstudio.com/files/hardware/tri-clamp-orifice-plate-gaskets/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-orifice-plate-gaskets\n",
 "sources": [
  {
   "publisher": "GW Kent",
   "title": "Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness",
   "url": "https://www.gwkent.com/triclamp-guide",
   "formats": [
    "web"
   ],
   "license": "publisher's guide; dimensions cited",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Rubber Fab",
   "title": "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)",
   "url": "https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf",
   "formats": [
    "PDF"
   ],
   "license": "maker chart; dimensions are facts",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "tri-clamp-screen-gaskets"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "Which hole size?",
   "a": "Start at 50 % of the bore; the flow through an orifice goes roughly with the hole area."
  }
 ],
 "files_license": null,
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   "file": "orifice-gasket-1.5in-8.7mm",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-orifice-plate-gaskets/orifice-gasket-1.5in-8.7mm.stl",
   "note": "1.5 in orifice-plate gasket: 1.5 plate, Ø8.7 hole (25 % of the bore)"
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-orifice-plate-gaskets/orifice-gasket-1.5in-17.4mm.stl",
   "note": "1.5 in orifice-plate gasket: 1.5 plate, Ø17.4 hole (50 % of the bore)"
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   "file": "orifice-gasket-1.5in-26.1mm",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-orifice-plate-gaskets/orifice-gasket-1.5in-26.1mm.stl",
   "note": "1.5 in orifice-plate gasket: 1.5 plate, Ø26.1 hole (75 % of the bore)"
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   "note": "2 in orifice-plate gasket: 1.5 plate, Ø11.9 hole (25 % of the bore)"
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   "file": "orifice-gasket-2in-23.8mm",
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   "note": "2 in orifice-plate gasket: 1.5 plate, Ø23.8 hole (50 % of the bore)"
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   "file": "orifice-gasket-2in-35.6mm",
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   "file": "orifice-gasket-3in-18.2mm",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-orifice-plate-gaskets/orifice-gasket-3in-18.2mm.stl",
   "note": "3 in orifice-plate gasket: 1.5 plate, Ø18.2 hole (25 % of the bore)"
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   "note": "3 in orifice-plate gasket: 1.5 plate, Ø36.5 hole (50 % of the bore)"
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   "file": "orifice-gasket-3in-54.7mm",
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   "note": "3 in orifice-plate gasket: 1.5 plate, Ø54.7 hole (75 % of the bore)"
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   "file": "orifice-gasket-4in-24.3mm",
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   "stl": "https://xemstudio.com/files/hardware/tri-clamp-orifice-plate-gaskets/orifice-gasket-4in-24.3mm.stl",
   "note": "4 in orifice-plate gasket: 1.5 plate, Ø24.3 hole (25 % of the bore)"
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   "file": "orifice-gasket-4in-48.7mm",
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   "file": "orifice-gasket-4in-73mm",
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   "note": "4 in orifice-plate gasket: 1.5 plate, Ø73 hole (75 % of the bore)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-orifice-plate-gaskets/index.md"
}