安装要求 Delta Taba Flowmeter Installation Requirements
1. The measurement section where the flowmeter sensor probe is installed should be straight, and the length of the upstream and downstream straight pipe sections shall be in accordance with the calculation requirements provided by the Delta Taba flowmeter manufacturer. 2. The allowable deviation range of the angle at which the flowmeter sensor probe is inserted refers to the requirements of the flowmeter manufacturer's instructions. 3. For vertical pipelines, the flowmeter sensor probes can be installed at any position along the pipeline's horizontal plane at 360 ° along the circumference of the pipeline. The high and low pressure impulse pipe joints should be on the same level. For horizontal pipelines, the insertion position of the flowmeter sensor probe should be within 45 ° of the horizontal centerline of the cross section of the pipeline when measuring liquid; the insertion position of the flowmeter sensor probe should be above 45 ° of the horizontal centerline of the pipeline when measuring gas. Within range; the flowmeter sensor probe should be inserted horizontally when measuring steam. 4. The size of the hole in the pipe is Φ35. 5. The pressure transmitter for compensation is on the front straight pipe section, and the temperature transmitter (or platinum resistance) is installed on the rear straight pipe section away from the throttle device 2D. For some measurement points that cannot be discontinued for installation and media containing impurities, you can choose the on-line installation and removal of Delta Taba. The on-line installation and removal of the Delta Taba can install or repair the probe without stopping production, and is especially suitable for measurement points that cannot be installed or where the medium is dirty and require periodic maintenance. It is available in single lever drive type and double lever drive type for high pressure applications.
Features: Can be installed, disassembled, repaired and cleaned without stopping production.
Applicable conditions: Usually used for low-pressure air, water, gas, steam and other media.
Note: t≤120 ℃ P≤2.5MPa
The DEC-DTB Delta Taba flowmeter is composed of a detection rod and a pressure taking port. It crosses the interior of the pipe and is perpendicular to the tube axis. There are multiple total pressure detection holes on the upstream surface of the detection rod, and on the backflow surface of the detection rod. There are multiple static pressure detection holes, which are led out by the total pressure impulse pipe and the static pressure impulse pipe respectively, and the flow rate through the pipeline is calculated according to the differential pressure value of the total pressure and the static pressure.
是基于皮托管测速原理上发展起来的，它是通过管道的平均流速及管道的有效截面积的乘积来确定流量的。 The DEC-DTB Delta Taba flowmeter is developed based on the principle of pitot tube speed measurement. It determines the flow rate by the product of the average velocity of the pipeline and the effective cross-sectional area of the pipeline. 1. Cross-section shape of probe: Verabar is bullet-shaped, Deltaba is rhombus-like, rhomboids are cut to make the boundary between the high and low areas more obvious. 2. Position of the pressure hole of the probe rod: full pressure hole of Verabar. At the front end of the rod, the static pressure holes are on the two side walls of the rod; the full pressure hole of the Delta Taba flowmeter is also at the front end of the rod, but the static pressure hole is at the rear end of the rod to measure the back pressure (negative pressure). Therefore, under the same pipe diameter and flow rate conditions, the differential pressure produced by the Delta Tab probe is larger than that of the Verabar probe, about 20% -40% larger. 的显著优点。 This is a significant advantage of the Delta Taba flowmeter .