节流式差压流量计 使用的优越性 First, the superiority of the use of throttling differential pressure flowmeter
节流式差压流量计中的标准孔板结构 容易 复制， 不仅 简单牢固，性能稳定可靠， 而且 价格低廉。 ① The standard orifice plate structure in the throttling differential pressure flow meter is easy to copy, not only simple and firm, stable and reliable performance, but also low price. 需 要 实流校准就可使用，这在流量计中是少有的。 It can be used without real flow calibration, which is rare in flow meters.
节流式差压流量计的 适用范围广泛。 ② Throttle differential pressure flowmeter has a wide range of applications. 适用于全部单相流体， 同时 也可测量 部分混相流， 比 如气固、汽液、固液等。 Not only suitable for all single-phase fluids, but also for measuring some mixed-phase flows, such as gas-solid, vapor-liquid, solid-liquid, etc.
节流式差压流量计在 高温高压大口径和小流量 都 适用。 ③ Throttling differential pressure flowmeter is suitable for both high caliber and high caliber and small flow .
④ It is not sensitive to vibration and has excellent anti-interference ability.
、 节流式差压流量计 使用的 局限性 Limitations of Throttle Differential Pressure Flowmeter
①The measurement accuracy is medium level in the flow meter. Due to the complexity of many factors, it is difficult to improve the accuracy.
② The range is narrow. Due to the square relationship between the instrument signal and the flow, the general range is only 3: 1 to 4: 1 .
比 如需 要 较长的直管段( 通常 指孔板、喷嘴) ，一般难以满足。 ③ Site installation requirements are relatively high, such as long straight pipe sections ( usually orifice plates and nozzles ) , which are generally difficult to meet.
容 易产生泄露、堵塞 以 及冻结、信号失真等故障。 ④ The pressure line between the throttling device and the differential pressure display instrument is a weak link, which is prone to leakage, blockage , freezing, signal distortion and other faults.
通常也 指孔板、喷嘴) 。 ⑤ Large pressure loss ( usually also refers to orifice plate and nozzle ) .