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Rosemount
Rosemount 405 Compact Orifice Flow Element
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405: 0.5–12 in; β 0.40/0.50/0.65; 405C/P; liquid/gas/steam. RFQ size.
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RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Measuring range
Line sizes ½–12 in. (15–300 mm); 405C from 2 in.; DP limits by size/temp (e.g. ≤8 in. up to 1200 inH2O at ≤850 °F); max working pressure ASME B16.5 Class 600 / DIN PN100
Accuracy
405C discharge coefficient uncertainty ±1.00% (β=0.40/0.50/0.65; ±0.50% for β=0.40 with WD cal); 405P ±2.25% (½ in.), ±1.75% (1–1½ in.), ±1.25% (2–12 in.)
Output
N/A as primary element alone; pairs with Rosemount 3051/3051S/2051 transmitters (factory assemble → 3051CFC/3051SFC/2051CFC)
Process connection
Wafer/compact install between raised-face flanges; ANSI alignment ring for 10–12 in.; direct-mount 3-valve manifold or remote NPT
Wetted parts
316 SST primary element typical; beta options 0.40/0.50/0.65 (405C/P)
Media temperature
Direct mount −40 to 450 °F (−40 to 232 °C); remote mount −321 to 850 °F (−196 to 454 °C)
Fits wafer-style DP orifice flow where you need a Rosemount 405—compact orifice or conditioning orifice primary for 0.5–12 in lines with beta 0.40 / 0.50 / 0.65 and liquid, gas, or steam service.
Key advantages
- Sizes — 0.5–12 in (15–300 mm)
- Beta — 0.40 / 0.50 / 0.65
- Types — 405C conditioning (~2D/2D) or 405P standard
- T / P — Direct to ~450 °F; remote to ~850 °F; ANSI 600# / PN100 class
- Materials — 316 SST wetted
Typical applications
- General DP flow between flanges.
- Short-run conditioning orifice (405C).
- Gas/liquid/steam utility metering.
Selection guide
- 405C vs 405P
- Beta / line size
- Direct-mount transmitter
Common mistakes
- Ignoring straight-run table for 405P.
- Pulsating flow near pumps/valves.
- Exceeding direct-mount temperature.
When to RFQ / what to tell us
- Size, beta, C vs P.
- Transmitter, quantity, ship-to.
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Specs
| Spec | Value |
|---|---|
| SKU | 38839 |
| Brand | Rosemount |
| Model | 405 |
| Product type | Compact Orifice Flow Element |
| Type | Compact orifice / conditioning orifice primary element (Rosemount 405) |
| Line sizes | 0.5–12 in (15–300 mm) |
| Beta | 0.40 / 0.50 / 0.65 |
| Fluids | Liquid, gas, steam |
| Temperature | Direct mount to ~450 °F; remote to ~850 °F |
| Pressure | ANSI B16.5 600# / DIN PN100 class |
| Feature | 405C conditioning (~2D/2D) or 405P standard plate |
Documents
FAQ
Q: Line size range? A: 0.5–12 in.
Q: 405C benefit? A: Conditioning plate with short ~2D/2D straight-run class.
Q: What should I send for a quote? A: Size/beta/type, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | Line sizes ½–12 in. (15–300 mm); 405C from 2 in.; DP limits by size/temp (e.g. ≤8 in. up to 1200 inH2O at ≤850 °F); max working pressure ASME B16.5 Class 600 / DIN PN100 |
| Accuracy | 405C discharge coefficient uncertainty ±1.00% (β=0.40/0.50/0.65; ±0.50% for β=0.40 with WD cal); 405P ±2.25% (½ in.), ±1.75% (1–1½ in.), ±1.25% (2–12 in.) |
| Output | N/A as primary element alone; pairs with Rosemount 3051/3051S/2051 transmitters (factory assemble → 3051CFC/3051SFC/2051CFC) |
| Process connection | Wafer/compact install between raised-face flanges; ANSI alignment ring for 10–12 in.; direct-mount 3-valve manifold or remote NPT |
| Wetted parts | 316 SST primary element typical; beta options 0.40/0.50/0.65 (405C/P) |
| Media temperature | Direct mount −40 to 450 °F (−40 to 232 °C); remote mount −321 to 850 °F (−196 to 454 °C) |
| Ambient temperature | Per assembled transmitter ambient limits (DP Flow PDS) |
| Approvals | NACE (per transmitter/PDS options); hazardous location via assembled transmitter |
| Notes | Specs from Emerson Rosemount DP Flow Meters PDS 00813-0100-4485 (405 Compact Primary Element) + 405 Compact Orifice Series reference manual. |
| Service | Liquid, gas, vapor |