产品概述
一体式孔板（一体化差压流量计）（Integral Orifice）
一体式孔板是一体式（One-Piece）差压流量计。虽属于基于孔板的流量计，但设计不同，安装和调试大为简化。
一体式孔板是具备以下全部要素的独立式孔板流量计：一体式三阀组 · 载体取压口与阀组之间的一体式连接 · 工厂安装于阀组并按用途预先设定的差压变送器 · 完成全面泄漏试验及设定。
特点：将一次元件与差压变送器组合为一个流量计组件。因是以组件状态经过压力试验的一体式流量计，无需追踪、修理泄漏部位，可靠性得以提高。通过一体式多变量变送器和 RTD，在单一单元内一体测量质量流量（液体、蒸汽）及修正体积流量（气体）。一体式引压连接无需铺设引压管路，且无论安装位置如何都能提供重复性良好的差压连接。安装部件只有一个，无需另行供应、连接阀组，可降低安装成本。以一个订购代码即可指定整台流量计，且孔径比（Ratio）只有两种，规格确定简单。
DHIO-FM：一体式孔板是可与差压变送器紧密耦合（Close-coupled）构成完整流量计的流量元件，可方便地安装并低成本地测量工厂计量及研究课题中常见的小流量。可按内 NPT 螺纹或在节流部上、下游焊接法兰管道（测量管段）的形式订购，孔板组件可直接安装于变送器，或通过选配适配器套件（155S711）远程安装。
DHIO-BN / DHIO-BY：一体式孔板块式是以质量单位一体测量液体、蒸汽的小型流量计，气体流量则以换算体积单位一体测量。
English description
Integral Orifice the One-Piece DP Flow Meter. Integral Orifice is an orifice-based flow meter with a difference - Its advanced design greatly simplifies installation and commissioning. Integral Orifice is a stand-alone, orifice-based flow meter that incorporates all the following features: Integral 3-valve manifold; Integral connections between the carrier tappings and manifold; DP transmitter, factory-mounted onto the manifold and pre-configured for the application; Fully leak-tested and configured. Model DHIO-FM: The integral orifice is a flow element capable of being close coupled with differential pressure transmitters to make a complete flow meter. It provides easy-to-install, low-cost measurement of the small flows found frequently in plant metering operations and research projects. It can be ordered with internal NPT threads or flanged pipe runs, welded both upstream and downstream of the flow restriction. The orifice assembly may be directly mounted to the transmitter or remote using optional adapter kit 155S711. Model DHIO-BN / DHIO-BY: Integral Orifice Block Type - a compact flow meter, providing measurement Integrally in mass units for liquids and steam. Gas flow is measured Integrally in reduced volume units.