Brief Introduction of Vortex Flowmeter Products;
Vortex flowmeter is mainly used to measure the flow of medium fluid in industrial pipelines, such as gas, liquid, vapor and other media. It is characterized by small pressure loss, large measuring range and high precision, and is almost not affected by parameters such as fluid density, pressure, temperature and viscosity when measuring the volume flow under working conditions. There are no moving mechanical parts, so the reliability is high and the maintenance amount is small. Instrument parameters can be stable for a long time.
Vortex flowmeter adopts piezoelectric stress sensor with high reliability and can work in the working temperature range of-20℃ to+250℃. It has analog standard signal and digital pulse signal output, and is easy to be used with digital systems such as computers. It is an advanced and ideal measuring instrument.
Vortex street flowmeter is a product carefully designed on the basis of comprehensive absorption of advanced technology from developed countries and summarization of years of research and production experience. It realizes intellectualization, standardization, serialization, generalization, mold production and ensures the beauty of product quality. The product has the characteristics of advanced circuit, low power consumption, wide range ratio, simple structure, small resistance loss, firmness and durability, wide application range, long service life, stable work, convenient installation and debugging, etc.
Suitable media for vortex flowmeter:
Condition: Reynolds number ReD of single-phase fluid is greater than or equal to 2×104
Medium: liquid (water, sewage, weak acid, weak alkali solution, etc.); Gas (air, oxygen, hydrogen, nitrogen, natural gas, etc.); Steam (saturated steam and superheated steam)
Main Functions of Vortex Flowmeter:
★ Monitoring temperature, pressure and flow simultaneously;
★ Integration of temperature and pressure compensation;
★ Quantitative control signal output;
★ Alarm for the upper and lower limits of instantaneous flow;
★ With RS-485 communication or HART communication protocol;
★ Output 4 ~ 20mA signal or frequency signal corresponding to instantaneous quantity;
★ Instantaneous flow rate, cumulative flow rate, temperature value and pressure value are displayed on the same screen.
Technical specifications of vortex flowmeter:
Sensor
测量原理 | 卡门涡街 |
探头类型 | 压电晶体 |
公称通径 | DN20...2000（3/8…80'） |
连接方式 | 法兰连接、法兰卡装连接、法兰固定插入式 |
材 质 | 探头：316不锈钢 |
旋涡发生体：304不锈钢（标准）、316不锈钢 |
表体：304不锈钢（标准）、316不锈钢 |
法兰：碳钢（标准）、304不锈钢、316不锈钢 |
测量介质 | 液体、气体、蒸汽 |
测量精度 | ±1.0％、±1.5％、±2.0％ |
重复性 | ±0.3% |
介质温度 | 小于350℃ |
压力等级 | DN20～DN50：PN40；DN50～DN100：PN25；DN25～DN200：PN16； DN200～DN600：PN10。 |
测量范围 | 液体：0.3～10m/s 气体：3～50m/s 蒸汽：3～50m/s |
转换器
类型 | PTG10模拟型:无显示，只带频率输出。 PTG20智能型：具备以下所有功能 |
显示 | 显示屏：8位LCD带背光液晶显示 |
显示内容：累积流量、瞬时流量、瞬时流量百分比、 压力值、温度值、电池量（电池供电型） |
瞬时流量单位：m3/h、kg/h、t/h、 累积流量单位：m3、kg、t |
电源 | 电压范围：直流（20～24）VDC或电池 |
功率：小于2W |
模拟量输出 | 二线制或三线制4～20mA（负载0～500KΩ） |
频率输出 | 输出范围：1～2000HZ 电气隔离：变压器隔离，隔离电压：>1000VDC 输出驱动：晶体管输出，最高承受电压36VDC，最大负载250mA |
报警输出 | 报警输出点：瞬时流量上、下限报警，累积流量定量点报警 电气隔离：变压器隔离，隔离电压：>1000VDC 输出驱动：继电器输出，最高承受电压36VDC，最大负载250mA |
通 讯 | Modbus（RS-485或RS-232）,HART |
补偿类型 | 气体温度或压力补偿；气体压力补偿；气体温度补偿； 饱和蒸汽压力补偿；饱和蒸汽温度补偿；过热蒸汽温度压力补偿。 |
防护等级 | 标准：IP67 |
可选：IP68（分体式可选） |
防爆等级 | 标准：无防爆 |
可选：隔爆（ExdⅡCT4）、本安防爆（ExiaⅡCT6） |
电气接口 | 2×M20×1.5 |
工作环境 | 环境温度：-20℃～+60℃ |
相对湿度：5%～90% |