- New
Orifice Plate Flow Meter (DN50 to DN1200, ISO 5167, up to PN 16 MPa)
Differential pressure orifice plate flow meter for liquids, gases and steam, DN50 to DN1200, beta 0.20 to 0.75, corner, flange or D and D/2 taps, accuracy class 1.0, nominal pressure up to 16 MPa.
Certified equipment
ATEX / IECEx documentation supplied where stated
Worldwide delivery
Incoterms agreed in each quotation
Quotation first
Price, lead time and certificates in every offer
The orifice flow meter is a differential pressure primary element. As the fluid passes through the orifice plate, the flow contracts, the velocity increases and the static pressure falls; the resulting differential pressure across the plate is related to the flow rate by the square-root law, according to the energy conservation and continuity equations.
With no moving parts, the device is rugged and suited to high temperature and high pressure service. It is used with a differential pressure transmitter and, for gases and steam, with pressure and temperature measurement for compensation. Design and calculation follow ISO 5167, and a worn or resized plate can be replaced without changing the whole metering run.
Key features
- No moving parts: orifice plate, pressure tapping device and flanges
- Design and calculation according to ISO 5167 (AGA-3 also cited by the manufacturer)
- Corner taps (annular chamber or single tappings), flange taps or D and D/2 taps
- Suitable for liquids, gases and steam, including high pressure and high temperature service
- Low-cost replacement of the plate when process data change
- Wide choice of plate materials: 304 / 316 stainless steel, Hastelloy, Monel
Technical data
| Model | Orifice plate flow meter (throttling device) |
| Measuring principle | Differential pressure (orifice plate) |
| Nominal diameter | DN50 to DN1200 (above DN1200 a flow calibration is required) |
| Diameter ratio β | 0.20 to 0.75 |
| Reynolds number | ReD ≥ 5,000 for β 0.20 to 0.45; ReD ≥ 10,000 for β 0.45 to 0.75 |
| Nominal pressure | Up to PN 16 MPa |
| Accuracy class | 1.0 (overall ±1.0 to ±2.0 % of rate depending on design, installation and associated instruments) |
| Rangeability | Typically 3:1 (extendable with dual-range DP transmitters) |
| Operating temperature | Depending on materials and seals (manufacturer quotes -200 to +800 °C) |
| Pressure taps | Corner taps, flange taps, D and D/2 taps |
| Materials | 304 / 316 stainless steel, Hastelloy, Monel |
| Associated instruments | DP transmitter; pressure transmitter and temperature sensor for gas and steam compensation |
| Impulse lines | Inner diameter above 6 mm, length preferably within 16 m |
Applications
- Boiler and process steam metering and energy management
- Natural gas, air and fuel gas flow with pressure and temperature compensation
- High pressure, high temperature liquids such as boiler feedwater, hot oils and chemical feedstocks
- Clean liquids such as water and solvents in process control
Hazardous areas
The orifice assembly itself has no electrical parts; the associated transmitters are standard versions for safe areas. Ask us for hazardous-area options.
Supplied on quotation and configured to your process data (range, process connection, materials, output, options). Datasheet available on request.
Supplied from a qualified manufacturer selected by ASSINOV. Origin, manufacturer details and certificates are provided with our quotation.
AG-FLW-110
Data sheet
- Accuracy
- Class 1.0
- Process connection
- Flanged / DN50 to DN1200
- Measuring principle
- Differential pressure (orifice plate)
- Max. pressure
- PN 16 MPa
- Wetted material
- 304 or 316 SS; Hastelloy; Monel
13 other products in the same category:
Differential pressure orifice plate flow meter for liquids, gases and steam, DN50 to DN1200, beta 0.20 to 0.75, corner, flange or D and D/2 taps, accuracy class 1.0, nominal pressure up to 16 MPa.