关于差压 (DP) 流量测量
罗斯蒙特差压流量解决方案采用经验证技术的创新设计，可有效提高测量能力。
罗斯蒙特差压流量解决方案采用经验证技术的创新设计，可有效提高测量能力。
凭借着 30 多年的工程经验，艾默生打造了一套完整的差压流量计，也称为 DP 流量计和 DP 变送器。Rosemount™ 和差压流量产品可在多种应用中尽可能地提高效率。
作为流量测量中最常使用的技术之一，差压（DP）流量测量长久以来一直具备高精度及稳定性。此测量技术可从单个流量计解决方案获得补偿的流量、压力和温度读数，某些情况下无需取压管线。 罗斯蒙特流量计可以在预配置、完成泄漏试验和到手即装的状态下交付，缩减安装时间与成本，提高工厂整体产能。
需要用到三个基本元件来设计差压流量计。一次元件通过在管道内引入节流元件而在流量计两端产生压降，并且这样设计的节流元件可利用伯努利方程式计算流量。由二次元件差压变送器测量压降，而第三方元件包括系统内的所有零件，例如导压管以及连接器。
压力一次元件设计与选项多样，适用于多种管线尺寸和流量。选项包括标准和调节孔板、均速皮托管和楔形。每个选项具备相应优点，例如更严格的过程控制、多种安装配置、高精度、易于安装、维护成本低、永久压力损失减少，还有可减少过程渗透的一体温度传感器选件。
差压流量与差压平方根成比例，使得压力成为差压流量计算的关键组成部分。影响质量流量的其他因素包括：密度、粘度、温度、管径和流体类型。许多工业过程中使用了大量测量和控制装置来确保获得准确的液体、气体和蒸汽流量，从而提高安全性、生产率和成本效益。
为了获得一流性能，MultiVariable™ 变送器测量静态压力、差压和温度，可设计用于计算流量。流量计可提供过程变量输出以及计算的实时质量、体积或能量流量。计算流量输出可快速提供准确、可靠的信息，从而改善过程性能。
差压流量测量可用于优化过程的诸多方面，包括产品一致性、保管转移、生产效率和安全应用。罗斯蒙特差压流量测量解决方案具有通用性，易于安装和排除故障。装置适用于各类流体，包括腐蚀性液体、泥浆、饱和或过热蒸汽、气体和许多其他过程应用。
无线技术让流量计即使在恶劣工况中也能快速获取更多关键过程信息。此技术能及时提供信息，有助于延长资产使用寿命、提高过程装置效率、减少维护并实现安全和环境目标。此外，完全集成的无线流量计可降低安装成本、优化过程。
In this video you will learn about different primary element types and how they work, the conventional to modern transition of installation practices, and the functionalities within a differential pressure transmitter.
In this video you will learn about different primary element types and how they work, the conventional to modern transition of installation practices, and the functionalities within a differential pressure transmitter.
This video provides a detailed explanation of how Rosemount™ Annubar™ averaging pitot tubes work, including reduction of permanent pressure loss to reduce overall costs. Features and benefits are presented to show how averaging pitot tubes are an ideal flow measurement principle utilized across many different industries.
This video is a detailed explanation of how Rosemount Conditioning Orifice plates work, including the benefits and installation best practices. The video helps users understand how reducing straight run requirements in your DP Flow installation will save time, effort, and budget.
In this video you will learn about different primary element types and how they work, the conventional to modern transition of installation practices, and the functionalities within a differential pressure transmitter.
This video provides a detailed explanation of how Rosemount™ Annubar™ averaging pitot tubes work, including reduction of permanent pressure loss to reduce overall costs. Features and benefits are presented to show how averaging pitot tubes are an ideal flow measurement principle utilized across many different industries.
This video is a detailed explanation of how Rosemount Conditioning Orifice plates work, including the benefits and installation best practices. The video helps users understand how reducing straight run requirements in your DP Flow installation will save time, effort, and budget.
