D-FL 220 Volume Flow Measuring
General Details
Volume Flow Measuring System
Ultrasonic sensor system to measure the velocity and the volume flow of flue gas or process gas in pipes or ducts.
Suitable for velocity and volume flow measurement:
- at incinerators in general
- at facilities for cement production
- at power stations with gas, oil, coal or co-firing
- at installations for the incineration of biomass
Overview
Two identical sensors transmit and receive ultrasonic pulses alternately. The flow velocity of sample gas is precisely calculated from the transit time difference dependant on the direction. Taking into account the cross-section of the stack, the gas temperature and absolute pressure the flow rate is calculated in parallel.
D-FL 220 performs automatic check cycles and requires extremely low maintenance.
- In situ measurement, continuous measurement
- Measurement even in wet or dust-laden flue gas
- Allows calibration to measure the volume flow
- Also suitable for thick-walled stone / insulated ducts
- Automatic zero and reference point check
- Sensors are purged and are therfore not in contact with sample gas
- Easy installation, adjustment and maintenance
- No separate control unit required
- Normalization of the flow measurements as an option
- Very low maintenance
Specification
D-FL 220 Application Data |
|
| measurements | flow velocity volume flow, at operating conditions or normalized |
| sample gas | air, flue gas, non flammable process gas |
| flow velocity | 0 .. 10 / 20 / 40 m/s (0 … 32.75 / 65.5 / 131.25 ft/s) |
| duct diameter** | 0.5 – 13 m (1.75 – 512 in) |
| sample gas temperature** | -20 to 120 / 150 / 200 / 250 / 300°C (-4 to 248 / 302 / 392 / 482 / 572°F), others on request |
| sample gas pressure (relative to ambient pressure) |
-50 to +20 hPa, others on request |
| sample gas moisture | 0 – 100 % rel. humidity, condensation allowed |
| ambient temperature | -20 to 50 °C (-4°F to 122°F), others on request |
D-FL 220 Technical Data |
|
| measuring principle | evaluation of transition times of ultrasonic pulses dependent on direction and subsequent calculation of flow speed and volume flow |
| type | mounted at stack, measurement cross stack, purged sensors are not in contact with sample gas |
| system components | D-FL 220 MK measuring head D-FL 220 SPF purge flange D-FL 200 E mounting pipe with flange D-TB 100 Terminal Box D-BL purge air unit accessories |
| measuring path** | 1 – 15 m |
| orientation of the measuring path | 30 – 60° to flow direction, typically 45° |
| measuring range | 0 to 40 m/s, 0 – 4…5,000 * 1000 Nm3/h any range within the measuring range can be assigned to the analog output |
| delay time | > 1s … 180s, programmable |
| resolution | 0.1 m/s |
| process connection | D-FL 200 E mounting pipe with flange, similar to DN80 PN6, pipe DI=100 |
D-FL 220 MK2 measuring head |
|
| ambient temperature | -40 … 70°C |
| measurement output | 1x 4-20mA, 400 Ohm, isolated, can be assigned by any measured component and output range 1 x RS 485 Modbus RTU, bi-directional to control room |
| status output | 2 x relay NO, max. load 48V, 0,5A function can be assigned. typically: failure, maintenance |
| signal transfer | 1x Intercom RS 485 Master-Slave communication |
| service interface | USB 1.1 |
| service software | D-ESI 100, requires laptop with Windows XP ™ OS |
| check cycle | automated routines, self test, automatic or on request |
| supply | 24 VDC +- 10%, 0,5 A |
| protection | IP 65 |
| dimensions (h x w x d) | 110 Ø x 410…2450mm the length is depending on version |
| weight | depending on version |
| material | housing 1.4571/316Ti, polyamide, ca. RAL5017 fire class: B1 (UL 94 V0) process parts: 1.4571 transducer: PA6.6, PBT, FRP fire class: B1 (UL 94 V0) |
D-FL 220 SPF purge flange |
|
| weight | 4.5 kg |
| material | 1.4571 / 316Ti |
| dimensions (od x l) | 190mm x 90mm |
| flange | similar to DN80 PN6 |
| purge air connection | od=40mm |
| purge air requirements | 10 … max. 40 m3/h for each measuring head |
D-FL 200 E mounting pipe with flange |
|
| weight | depending on version |
| material | 1.4571 / 316Ti FRP (Durabest 180)* |
| flange | similar to DN 80 PN 6 |
| pipe | id=100mm, L=335 … 2135mm (steps 200mm) |
D-TB 101 A terminal box |
|
| ambient temperature | -25 to 55°C, others on request |
| power supply | 90 – 264 VAC, 48 – 62 Hz, 30 VA includes 24VDC supply for 2 x D-FL 220 M |
| dimensions (h x w x d) | ca. 160 x 160 x 110 mm |
| protection | IP 66 |
| weight | ca. 1,5 kg |
| material | polycarbonate, ca. RAL 7035 fire class: B1 (UL 94 V0) |
| fixation | 4 x bolt od= 8 to 10 mm |
D-BL blower unit |
|
| ambient temperature | -20 to 50°C, others on request |
| purge air supply | max. 40/60 m3/h at dPtot 50/25 hPa, others on request |
| supply | 115 / 230 VAC, 50 / 60 Hz, 0,37 / 0,43 kW, others on request |
| protection | IP 55 |
| dimensions (H x B x T) | 480 x 450 x 320 mm |
| weight | 12 kg |
| material | 1.4301 |
remarks |
|
| * Variants ** max. measuring path length depends on the sample gas temperature. Subject to technical modifications! |
Certificate
