Delta flowmeter

NegotiableUpdate on 12/15

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The HC-HLV series Deltaba flowmeter is an insertable flow measuring instrument. Insert a delta bar sensor into the pipeline, and when fluid flows through the sensor, a high-pressure distribution area is generated in the upstream direction and a low-pressure distribution area is generated in the downstream direction.

Product Details

1、 Product Introduction:

HC-HLV seriesDelta flowmeterThe full name of the model isHC-HLV-FC-P100C-LP-MT-DH-WXN.

HC-HLV seriesDelta flowmeterIt is a flow sensor designed using differential pressure working principle and plug-in installation method. Its working principle is a special throttling device, and its output is differential pressure. The sensor measures pressure through a probe (or probe), which has two rows of unevenly distributed pressure tapping holes in front and behind the probe (the diameter of the pressure tapping tube is about Φ 20, and the low-pressure aperture of the pressure tapping hole is Φ 8). By averaging the different pressures (flow rates) of the pipeline from top to bottom (left to right) through two rows of pressure holes, a differential pressure is formed, which can be used to calculate the mass flow rate or volume flow rate.

2、 Product scope of application

1. Nominal diameter: 25mm ≤ DN ≤ 6000mm2. Nominal pressure: PN ≤ 25MPa3. Medium temperature: t ≤ 650 ℃4. Accuracy level: 0.5111 level, 1 level, 1.51111 level

3、 Structural form

HC-HLV seriesDelta flowmeterIt is composed of a detection rod and a pressure tap, which crosses the inside of the pipeline perpendicular to the pipeline axis. There are multiple total pressure detection holes on the upstream side of the detection rod, and multiple static pressure detection holes on the downstream side of the detection rod, which are respectively led out by the total pressure conduit and the static pressure conduit. Based on the differential pressure value between the total pressure and static pressure, the flow rate through the pipeline is calculated.theoretical basisHC-HLV seriesDelta flowmeterIt is developed based on the principle of pitot tube speed measurement, which determines the flow rate by multiplying the average flow velocity of the pipeline and the effective cross-sectional area of the pipeline.1. Probe cross-sectional shape: The delta bar is a rhombus like shape, which can make the boundary between high and low areas more distinct.2. The position of the pressure hole on the probe rod: the full pressure hole with high power is located at the front end of the rod, and the static pressure hole is located on both sides of the rod wall;Delta flowmeterThe full pressure hole is also located at the front end of the rod, but the static pressure hole is located at the back end of the rod to measure the back pressure (negative pressure).Therefore, under the same pipe diameter and flow rate conditions, the differential pressure generated by the Delta probe is slightly larger than that of the Weiliba probe, about 20% -40% larger. This isDelta flowmeterSignificant advantages.

4、 Installation method and requirements

1. The measuring section for installing the detection rod should be straight, and the length of the upstream and downstream straight pipe sections should refer to the length specified in the table below.

2. The allowable deviation range for the angle of the detection rod insertion position is shown in the figure.

3. For vertical pipelines, the detection rod can be installed at any position along the circumference of the pipeline at 360 ° in the horizontal plane, and the high and low pressure impulse pipe joints should be on the same horizontal plane. For horizontal pipelines, the insertion position of the detection rod when measuring liquids should be within a range of 45 ° or less from the centerline of the horizontal plane of the pipeline cross-section; When measuring gas, the insertion position of the detection rod should be within a range of 45 ° or more from the centerline of the horizontal plane of the pipeline cross-section; When measuring steam, the detection rod should be inserted horizontally.

4. The opening size on the pipeline is Φ 35.

5. For compensation purposesPressure transmitterOn the front straight pipe section,Temperature Transmitter(or platinum resistor) installed on the rear straight pipe section at a distance of 2D from the throttling device.

For some measuring points that cannot be stopped for installation and media containing impurities, an online installation and disassembly type Deltaba can be selected.

Online installation and disassembly type DeltabaThe probe can be installed or maintained without stopping production, especially suitable for measuring points that cannot be stopped for installation or measuring points with dirty media that require regular maintenance. It is available in single rod drive type and double rod drive type for high voltage applications.

Features: Installation, disassembly, maintenance, and cleaning can be carried out without stopping production.

Applicable conditions:Usually used for low-pressure media such as air, water, gas, steam, etc.

Attention: When installing or disassembling online, it is necessary to meet the requirement of t ≤ 120 ℃ and P ≤ 2.5MPa