One Product Overview:

The HR-DRB Dilbar flowmeter has a simple structure, easy assembly and disassembly, low pressure loss, and low usage and maintenance costs. In today's world where energy is increasingly scarce due to rapid economic development, it is an energy-saving economic flowmeter worth promoting and using, especially in pipelines with a diameter greater than 200 millimeters. The advantages of the Dilbar flowmeter are more obvious. It is currently internationally recognized as a new type of plug-in flow meter with the highest accuracy, best repeatability, and most reliable operation in primary flow source detection. Therefore, in industries such as electricity, metallurgy, and petrochemicals.

II Product working principle:

When the fluid flows through the probe, the Dilbar flowmeter creates a high-pressure distribution area in front of it, and the pressure in the high-pressure distribution area is slightly higher than the static pressure of the pipeline. According to the Bernoulli equation principle, the velocity of the fluid increases as it flows through the probe, creating a low-pressure distribution area at the back of the probe. The pressure in the low-pressure distribution area is slightly lower than the static pressure of the pipeline. After the fluid flows through the probe, a partial vacuum is generated at the back of the probe, and vortices appear on both sides of the probe. The cross-sectional shape, surface roughness, and position of the low-pressure tapping hole of the flow probe are key factors determining its performance. The stability and accuracy of low-voltage signals play a decisive role in the accuracy and performance of probes.

III Product application areas:
HR-DRB Dilbar flowmeter is suitable for measuring various media: full tube, unidirectional flow, single-phase gases, vapors, and liquids with viscosity not exceeding 10 centipoise, such as:
1. Measurement of primary and secondary air in power plants;
2. Measurement of blast furnace gas;
3. Measurement of ethane, ethylene, natural gas, etc;
4. Measurement of gas, nitrogen, oxygen, etc;
5. Compressed air measurement;
6. Measurement of saturated steam and high and low pressure steam;
7. The Dilbar flow probe for measuring tap water, circulating water, etc., with its excellent anti blocking design, completely eliminates the disadvantage of easy blockage of insertion flow probes such as Anuba, and achieves an unprecedented level of anti blocking for the uniform velocity tube flow probe.

4 Design features of the probe:
The cross-sectional probe can generate precise pressure distribution and fixed fluid separation points; The low-pressure tapping holes located on both sides behind the probe and before the fluid separation point can generate stable differential pressure signals and effectively prevent blockages. The internal integrated structure can avoid signal leakage, improve the strength of the probe structure, and maintain long-term high accuracy.

Five Product usage and outstanding advantages:
1. Dilbar flow meters are suitable for high-precision flow measurement of gases, liquids, and vapors. Weiliba is a differential pressure and rate averaging flow sensor that measures flow by measuring the differential pressure generated by the sensor in the fluid. The Dilbar flowmeter reflects the true flow velocity of the fluid, with an accuracy of ± 1.0% and a repeatability of ± 0.1%.

2. The outstanding advantage of the Dilbar flowmeter is that it outputs a very stable and pulsation free differential pressure signal. The high-pressure tapping hole of the probe will not be blocked, forming a high-pressure zone at the front of the probe. The pressure is slightly higher than the static pressure of the pipeline, preventing particles from entering. Please note that the fluid velocity at the high-pressure tapping hole of the probe is zero, and no object will enter the tapping hole. When starting up, the fluid enters the bend under the static pressure of the pipeline, quickly forming a state of pressure equilibrium. After the pressure equilibrium state is formed, the fluid encounters high pressure at the inlet of the bend, detours and no longer enters the bend.

3. In general, dust, sand, and particles are concentrated at the rear of the probe under the action of vortex force to achieve intrinsic blockage prevention in the low-pressure hole of the Dilbar flowmeter. That's why autumn leaves always gather behind windward houses. Other probes have low-pressure pressure tapping holes located in the vacuum zone at the tail of the probe. Under the action of vortex forces, the low-pressure pressure tapping holes of the probe are quickly blocked by impurities brought by eddy currents. Unique design, with low-pressure tapping holes located on the back two sides of the probe side, at the front of the fluid separation point and wake area. This design fundamentally prevents blockage and can generate a very stable low-voltage signal.

VI Main technical parameters of the product:
1. Applicable pressure: 0-40MPa;
2. Applicable temperature: -180~+550 ℃;
3. Measurement accuracy: ± 1%;
4. Repetition accuracy: ± 0.1%;
5. Pipe size: DN38 to DN10000 round or square pipe;
6. Range ratio: greater than 10:1;
7. Flow range: The upper and lower limits of measurement are selected within the probe strength and allowable minimum differential pressure.

7 Advantages of probes:
1. It can measure multiple media and has a wide range of applications;
2. High precision and large range ratio;
3. The probe pressure hole is inherently anti blocking;
4. Stable measurement signal with minimal fluctuations;
5. Low permanent pressure loss of pipelines;
6. Low installation cost, basically maintenance free;
7. It can be installed and maintained online.

8 Characteristics of Dilbar flowmeter:
1. Stable signal:
The low-pressure tapping hole of the Dilbar flowmeter is located on both sides behind the probe side, between the separation point of the fluid and the probe, away from the vortex fluctuation area.
2. Excellent long-term high precision:
The Dilbar flowmeter can ensure long-term stability of accuracy because:
a、 It is not affected by wear, dirt, and oil stains.
b、 There are no movable parts in the structure.
c、 The design eliminates the occurrence of blockage. At the front of the probe, a high static pressure zone surrounds the probe to prevent the high-pressure tapping hole from being blocked. The most important thing is that the low-pressure hole is located on both sides behind the probe, and the fluid flows diagonally across the surface, protecting the low-pressure hole from being swept away. Other probes are prone to blockage because their low-pressure tapping holes are located in the low-pressure fluctuation area where impurities accumulate.

3. Minimum installation cost:
a、 Only a few inches of line welding is needed to complete the installation, which is very simple and fast.
b、 By using specialized tools, online installation under pressure can be achieved.
c、 All valves and interfaces for various instruments only require simple assembly, which requires very low assembly costs.

4. Very low operating costs:
a、 It is a non constricting throttling design, and as an insertable flow probe, the operating cost of the Dilbar flowmeter is the lowest;
b、 Dilbar flow meters only generate very low permanent pressure losses, typically less than 0.7KPa;
c、 The permanent pressure loss generated by an orifice plate component exceeds 14KPa;
d、 Compared to orifice plates, energy loss has been reduced by 95%.

5. The continuous operation of the Dilbar flowmeter fundamentally eliminates the possibility of blockage, but in the following situations, the Dilbar flowmeter still needs to pay attention to blockage prevention:
a、 When the pressure tube leaks, the high-pressure equilibrium zone of the probe is damaged, and particles with smaller diameters in impurities may enter the pressure tapping hole.
b、 When the pipeline is shut down, small impurities may enter the pressure tapping hole due to the Brownian motion of molecules.
c、 The system frequently starts and stops, and at the moment of formation in the high-pressure zone, small impurities may enter the pressure tapping hole. Over time, this may cause blockage of the probe.
d、 The medium contains a large amount of tar, algae, or fibrous substances, which may also cause blockage of the probe.

Nine Product application of new technologies:
The innovative design of the Dilbar flowmeter with a valve joint provides a new concept by incorporating an instrument shut-off valve at the joint of the instrument;
1. Make installation and maintenance easier;
2. Reduce the number of assembly components to make hardware connections;
3. Cost reduction;

4. Quick installation system;
5. Quick insertion and extraction;
6. Sealed drive system can avoid damaging components;
7. Can be applied to the installation of multiple probes separately;
8. All installations should not exceed 1 hour.

Ten Performance indicators of flow measurement system:
1. Measurement accuracy: ± 1% Repeatability accuracy: ± 0.1%;
2. Applicable pressure: 0-40MPa Applicable temperature: -180 ℃ -+550 ℃;
3. Measurement upper limit: depends on probe strength Measurement lower limit: depends on the minimum differential pressure requirement for measurement;
4. Range ratio: greater than 10:1;
5. Applicable pipe diameter: 38mm~9000mm round and square pipes;
6. Applicable media: full tube, unidirectional flow, unidirectional gas, steam, and liquid with viscosity not exceeding 10 centipoise;

It has a wide range of applications and is widely used for measuring various gases, liquids, and vapors. The following are typical application media:

1. Gas/liquid/vapor;
2. Natural gas/cooling water/saturated steam;
3. Compressed air/boiler water/superheated steam;
4. Gas/desalinated water;
5. Gas hydrocarbons/liquid hydrocarbons;
6. Hot air/low-temperature liquid;
7. Furnace gas/heat transfer liquid.

Eleven Application selection of probe:

1. M1 threaded connection economical and practical probe:

Application scope: It can be used for flow measurement of air, liquids, and other non hazardous gases and liquids at room temperature and pressure; Applicable pipe diameter: 38-1000mm;

2. M2 threaded connection reverse support probe:

Application scope: When the flow rate or pipe diameter is large, it is selected as the reinforced type of M1, especially suitable for flow measurement of large pipe diameter gases (such as air flow);

Applicable pipe diameter: 38-1600mm;

3. M3 flange connection probe:

Application scope: Especially suitable for flow measurement of flammable and explosive media such as high temperature and high pressure steam and oxygen. Partial insertion type can be selected to save costs while meeting process control requirements; Applicable pipe diameter: 38-10000mm; 4. M4 flange connection reverse support probe: Application range: Especially suitable for flow measurement of flammable and explosive media such as high temperature and high pressure steam and oxygen. When the flow measurement of the medium meets the process control requirements, partial insertion type can be selected to save costs; Applicable pipe diameter: 38-10000mm; 5. M5 safety thread connection probe: Application range: M5 probe can ensure good sealing performance even after multiple disassembly, and is used for flow measurement of non flammable and explosive gases or liquids such as air with temperature ≤ 300 ℃ and pressure ≤ 3.0Mpa. Especially suitable for flow measurement of medium and low pressure steam. Applicable pipe diameter: 38-1600mm. 6. M6 threaded connection online installation probe: Application range: M6 threaded connection online installation probe can be installed or disassembled without stopping production, especially suitable for measuring points that cannot be stopped for installation or measuring points with dirty media that require regular maintenance, such as blast furnace gas. In measurement scenarios where the straight pipe section is long enough, considering equipment cost savings, M61 non full pipe insertion type online installation probes can be used. Applicable pipe diameter: 38-10000mm; M61 non full pipe plug-in online installation probe; M62 full tube plug-in online installation probe; Option I (required when the options are M3/M4).

Twelve Flange grade:

ANSI 150 # standard carbon steel or stainless steel flanges S1150C/S, S2150C/S, S3150C/S, S4150C/S

ANSI 300 # standard carbon steel or stainless steel flanges, with numbers of 1300C/S, S2300C/S, S3300C/S, and S4300C/S

ANSI 600 # standard carbon steel or stainless steel flange S1600C/S, S2600C/S, S3600C/S, S4600C/S

Optional items (according to user needs) Ball valve or gate valve: 1. BC with carbon steel ball valve; 2. BS with stainless steel ball valve; 3. GC with carbon steel gate valve; 4. GS is equipped with stainless steel gate valves. Install a shut-off valve once:

medium	flow velocity	Minimum differential pressure
Gas liquid vapor	4.5m/s 0.6m/s 9.7m/s	0.025KPa 0.25KPa 0.38KPa

Thirteen Dilbar flowmeter selection:

Specification code	Instructions
Instrument type	HR-DRB	Dilbar flow sensor
Sensor probe type	M1	Threaded connection (economical) probe
M2	Threaded connection with reverse support probe
M3	Flange connection probe
M4	Flange connection with reverse support probe
M5	Safe threaded connection (spring locking) probe
M61	Non secure plug-in online installation probe
M62	Fully closed plug-in online installation probe
M7	Special requirements
Sensor Size	S1	10 # Sensor (Suitable for Pipe Diameter: 18-150mm)
S2	20 # Sensor (Suitable for Pipe Diameter: 150-1000mm)
S3	30 # Sensor (Suitable for Pipe Diameter: 300-1600mm)
S4	Special requirements
pipe size	Y	Outer diameter/wall thickness of circular tube (mm)
F	Square tube width/height/wall thickness (mm)
YC	Inner lining pipeline outer diameter/wall thickness/inner lining thickness (mm)
Sensor material	SL	316L stainless steel
SX	Special requirements
Installation direction of pipeline	H	horizontal direction
V	vertical direction
Pipe material	CS	carbon steel
SS	stainless steel
XX	special material
connection method	A	Threaded connection joint, side opening
B	Threaded connection joint, top clamp
BV	Built in shut-off valve
C	Welding connection joint, side opening
D	Welding connection joint, top opening
DH	High temperature and high pressure welding connection joint, top opening
K	Integrated connector (withDifferential pressure transmitterOr used in conjunction with a traffic converter)
AT	Built in temperature sensor connector