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CH-HLVD deltabar flow meters can be used to measure dry gases, humid gases, liquids or vapors, regardless of the dielectric constant. Applicable to a wide range of diameters, from 3 mm to 15 meters, just three specifications, DF8 for ultra-small diameter, DF10 for small diameter, they are pipeline connection; DF25 for common diameter (65 mm ~ 3 meters); DF25D for steam; DF25HD for high pressure (69Mpa, double-sided support); DF25 Qicklock to meet the requirements of rapid disassembly; DF50 for large diameter; for high temperature, corrosive media, with special probe materials and pipe connection materials; for media with high density of dusty substances, online blowing device can be used to ensure the flexibility of a variety of working conditions. The usual pressure loss of the homogeneous tube is much smaller than the orifice plate, only 5~10% of the orifice plate; on the other hand, because of the small pressure loss, it will bring about a small differential pressure (the pressure difference between the high pressure and the low pressure), which makes it possible to increase the requirements for the selection of the differential pressure transmitter and increase the cost, or else it will reduce the output accuracy of the transmitter because the range can not be done to the full scale. So a good probe must take into account the pressure loss and differential pressure two aspects. GZ delta bar surface design takes this factor into full account, the cross-section itself is symmetrical, the surface is divided into three parts (the following figure), the face part of the smooth section, so that the probe smooth contact with the media; the second part of the accelerated section, the average acceleration of the medium's flow rate by a factor of three, by increasing the contact surface of the media to improve the pressure on the face section; The third part of the high and low pressure demarcation spike, suddenly resistance disappears, behind the probe to form a low-pressure area, the actual color velocity spectrum can fully reflect the changes in the medium flow rate. Therefore, the design of XY-HLVD series deltabar probe meets the requirements of small pressure loss and large differential pressure.
High precision:
After third-party testing, and according to **** new data show that 2% accuracy can be achieved despite a fairly short straight pipe section. The straight pipe section to achieve 1% accuracy is much shorter than typical products, as shown below. Repeatability is 0.1%. Due to the low pressure loss, there is little wear and tear on the probe, and high accuracy can be maintained for a long time with proper installation.
Low running cost:
Due to the small pressure loss, the power loss in the pipeline is small, in general sense, the running cost of the homogeneous tube is only one tenth of the orifice plate.
Small installation workload:
Because the sensor is inserted into the way of work, with the installation of the party to make, simple features. For most of the through diameter just open a small hole in the pipeline. CH-HLVD series deltabar DF25, aperture 28 mm, DF50 for 54 mm, and then the probe conduit and pipeline welding, it is basically completed on-site installation, the workload is the installation of orifice plate of 40%. According to many years of installation experience, it takes 5 minutes to open the hole, 20 minutes to weld the probe casing, 10 minutes to insert the fixed probe, 5 minutes to install the three-valve manifold, 10 minutes to install the differential pressure transmitter, 10 minutes to connect the wiring, and the whole process takes about 60 minutes (integrated). Free choice of integrated/split installation: DeltaBar's probes are integrated in the entire sense of the word, regardless of whether the medium to be measured is a gas or a liquid, or a high-temperature superheated vapor, it is possible to install the differential pressure probe, the measurement of temperature and pressure, and the differential pressure transmitter on a single probe, and there are more than 10 types of connections between the probe and the differential pressure transmitter (options), including condensers specially designed for superheated vapors, ellipticals for There are more than 10 types of connections (options) between the probe and the differential pressure transmitter, ranging from condensers specifically for superheated steam, to elliptical flanges for direct connection to the transmitter, to simple R1/2″ male threads, providing a wide range of connections for split/integrated installations to meet a wide range of needs. For superheated steam, most products require split mounting, and the user must provide their own condenser and other accessories. However, GZ DETABA, together with the condenser, shut-off valve or ball valve, provides a safe, reliable, simple and feasible solution, which is truly an integrated probe.
Large holes are not easy to block:
For flue gas measurement or gas/liquid measurement with particles, the problem of clogging is a concern for most users. Chonghui guarantees that if the dust in the medium is not greater than 130mg/m3, no maintenance or purging is required for the CH-HLVD series deltabar probes. From the perspective of fluid dynamics, any shape of wedge in the fluid, there will be a buildup of fluid at the front end, so that the pressure increases, the pressure decreases after the wedge, in the movement of the dust, no matter how high the high pressure, how small the low pressure, there will be the possibility of entering the wedge in the hole. In the fluid at rest, due to Brownian motion, the dust is more likely to enter the hole in the wedge. So the problem is not so much the pressure or the cross-section of either, but how can we get this dust out and not build it up. Undoubtedly, regular blowing is a solution. Chuanghui company has done a lot of research on the distribution of holes on the probe and the diameter of the hole, the hole diameter is large (8 mm) foreign matter is easy to enter, but also easy to come out; the upper and lower two holes are close to the edge of the probe (edge of the pipeline), foreign matter is not easy to pile up. Hole diameter is small, will undoubtedly result in not easy to enter, but also not easy to come out, and into the yes, how much is just a matter of time. Other products have much smaller holes than the GZ Deltabar.
