Instructions for using DN80 gas turbine flowmeter

Description :

　　This product consists of two parts: a sensor and a display instrument. It can be used to measure the instantaneous flow rate and cumulative total amount of gas when paired with the corresponding flow integrator or display instrument.

　　1、 Product Features

　　Adopting a new type of sensor, with low starting flow rate, small pressure loss, good anti vibration and anti pulsating flow performance, not easy to corrode, good reliability, and long service life;

　　Adopting a new type of microprocessor and high-performance integrated chips, with high computational accuracy, powerful overall functions, and superior performance;

　　Adopting advanced low-power high-tech, the whole machine has low power consumption. It can operate on both internal battery power for a long time and external power supply;

　　According to the flow frequency signal, the instrument coefficient can be automatically linearly corrected in eight segments, which can improve the calculation accuracy of the instrument according to user needs.

　　2、 Technical parameters

　　Caliber: DN15~DN3000mm

　　Nominal pressure: 0.6-42MPa

　　Operating temperature: -180~+500 ℃

　　Accuracy of natural gas flowmeter: ± 0.2 to ± 1.5% FS

　　Range ratio: 1:10

　　Shell: Carbon steel; Stainless steel (or provided according to user requirements) (lined with fluorine)

　　Power supply method for natural gas flowmeter: built-in 3.6VDC lithium battery (changed every two years); External supply 24VDC (optional)

　　Output signal of natural gas flowmeter: 4-20mA two-wire system; Pulse frequency range of 0-1000Hz; RS232/RS485 (or to be provided upon user request)

　　Protection level: IP65 IP67

　　Explosion proof mark: intrinsic safety type ExiallCT4; Explosion proof ExdllCT4

　　Execution standard: Enterprise standard Q/BET05-06

　　Header display: Accumulated traffic; Instantaneous flow rate; Operating temperature; Operating pressure (only available with temperature pressure compensation)

　　3、 Installation form

　　1. The internal structure should use a reverse thrust turbine flowmeter. Because the reverse thrust structure can keep the impeller in a floating state within a certain flow range, there are no contact points in the axial direction, and there is no end face friction and wear, which can extend the service life of the bearing.

　　2. According to the selection of pipeline connection methods, flow meters can be installed horizontally and vertically. Horizontal installation and pipeline connection methods include flange connection, threaded connection, and clamp connection. Select flange connection for medium caliber; Use threaded connections for small-diameter and high-pressure pipelines; Clamp on connections are only suitable for low-pressure small and medium-sized pipe diameters; Vertical installation only has threaded connections.

　　3. Select based on environmental conditions, taking into account the effects of temperature and humidity. Natural gas metering should choose intrinsically safe explosion-proof turbine flow meters.

　　4、 Installation

　　After the installation of the flowmeter, it should be checked before operation to ensure that the flowmeter can operate normally in production. There are generally the following points that need to be confirmed.

　　1. When confirming that the pipeline has been cleaned and needs to be cleaned again, the cleaning solution should be allowed to pass through the bypass pipeline.

　　2. Confirm that the configuration and installation of each auxiliary device are correct.

　　3. Confirm that the circuit wiring is correct.

　　4. Confirm that there is no leakage in the pipeline, and that the downstream regulating valve of the gas turbine flowmeter (sensor) is flexible and there is no leakage when closed.

　　5. Slowly open the downstream regulating valve of the flow meter (sensor) and confirm that the flow meter (sensor) is displaying normally.

　　6. Confirm that the pipeline support is reliable and there is no vibration under flow conditions.

　　7. Confirm that the downstream pressure of the gas turbine flowmeter (sensor) is greater than Pmin.

　　8. Confirm that there is no leakage in the bypass valve.

AfterSalesService :

• Instructions for using DN80 gas turbine flowmeter