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An orifice plate is installed in a manhole or chamber to restrict and regulate flow to a set value, typically in attenuation tanks and stormwater installations. Each plate is cut to the project's requirements - the opening is calculated against the installation's hydrostatic conditions. Manufactured in 30 mm PE (PE 500) or 6 mm 316 stainless steel and supplied complete with an installation kit.

Standards: Flow performance in accordance with BS EN ISO 5167-2:2022. Manufactured in accordance with ISO 9001:2015.
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| Component | Material |
|---|---|
| Plate | PE (HDPE 500), 30 mm |
| Alternative | 316 stainless steel (1.4401), 6 mm |
| Installation kit | EPDM seal, chemical anchor and 316 threaded rod |
ISO 9001
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10 variants
| Item no. | Röretsinnerdiameter | Amm | Bmm | Cmm | Max viktkg | Description | Quote |
|---|---|---|---|---|---|---|---|
| OP100 | 100 | 300 | 300 | 30 | 2,56 | Orifice Plate DN100 (made to order) | |
| OP150 | 150 | 350 | 350 | 30 | 3,49 | Orifice Plate DN150 (made to order) | |
| OP200 | 200 | 400 | 400 | 30 | 4,56 | Orifice Plate DN200 (made to order) | |
| OP250 | 250 | 450 | 450 | 30 | 5,77 | Orifice Plate DN250 (made to order) | |
| OP300 | 300 | 600 | 600 | 30 | 10,27 | Orifice Plate DN300 (made to order) | |
| OP350 | 350 | 650 | 650 | 30 | 12,06 | Orifice Plate DN350 (made to order) | |
| OP400 | 400 | 700 | 700 | 30 | 13,98 | Orifice Plate DN400 (made to order) | |
| OP450 | 450 | 750 | 750 | 30 | 16,06 | Orifice Plate DN450 (made to order) | |
| OP500 | 500 | 800 | 800 | 30 | 18,27 | Orifice Plate DN500 (made to order) | |
| OP600 | 600 | 900 | 900 | 30 | 23,12 | Orifice Plate DN600 (made to order) |
A and B are the plate's outer dimensions, C is the thickness. The orifice's inside diameter is calculated per project and specified at the time of ordering. A version in 316 stainless steel and a curved back for round manholes are available on request. An installation kit is included as standard; additional kits can be supplied. Installation: Ø10 mm hole to 80 mm depth, chemical anchor, and the nuts tightened to 4 Nm. The orifice plates are not yet priced in the price list - price available on request.