| 孔板流量计和喷嘴流量计优缺点有哪些？ |
| 信息来源： 流量变送器 | 2019-04-25 点击量： 6915 |
孔板流量计和喷嘴流量计优缺点有哪些?孔板和喷嘴流量计是两种不同的差压式流量计，西安华恒仪表介绍：
What are the advantages and disadvantages of orifice plate flowmeter and nozzle flowmeter?Orifice plate flowmeter and nozzle flowmeter are two different differential pressure flowmeters.
孔板流量计按国标规定进行设计、制造和检定的标准孔板无需实流标定，精度高、结构简单、制造成本低，但压力损失在所有标准节流装置中最大，不适用于要求压力损失小的情况，标准孔板广泛用于石油、化工、冶金、电力等行业。
The orifice plate flowmeter designed,manufactured and calibrated according to the national standard does not need real-flow calibration.It has high accuracy,simple structure and low manufacturing cost.However,the pressure loss is the largest in all standard throttling devices,and it is not suitable for situations requiring low pressure loss.The standard orifice plate is widely used in petroleum,chemical,metallurgical,power and other industries.
1.喷嘴流量计
优点：标准喷嘴历史悠久，有大量的各种试验数据，喷嘴流量计结构简单牢固，无可动部件、长期使用稳定可靠，丰富的设计制造和应用经验，标准化程度高，可不必进行实流标定。标准喷嘴有可靠的实验数据和完善的国际、国家标准。计量数据真实可信，可作为贸易结算计量用表。
缺点：生产制造较复杂，单价较高.
1.Nozzle flowmeter
Advantages:Standard nozzle has a long history,a large number of test data,simple and solid structure of nozzle flowmeter,no movable parts,stable and reliable long-term use,rich experience in design,manufacture and application,high degree of standardization,no need to carry out current calibration.Standard nozzles have reliable experimental data and perfect international and national standards.The measurement data are authentic and credible,and can be used as a measurement table for trade settlement.
Disadvantage:The production and manufacture are complex and the unit price is high.
2.孔板
孔板流量计优点：性价比较高。标准孔板历史悠久，有国际、国家标准及检定规程和大量的试验数据，不用实流标定。计量数据真实可信，可作为贸易结算计量用表。
缺点：孔板锐角边的磨损、脏污等因素均会影响计量精度。检定周期较短6-12个月。
2.orifice plate
Orifice plate flowmeter has the advantage of high cost performance.Standard orifice plate has a long history.It has international and national standards,verification rules and a large number of test data,and does not need real-flow calibration.The measurement data are authentic and credible,and can be used as a measurement table for trade settlement.
Disadvantage:The wear and dirt on the sharp edge of orifice plate will affect the measurement accuracy.Shorter verification period 6-12 months
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