产品名称：工式二阀组

产品型号：DCCH2

所属类别：仪表阀组 >> 两阀组

所属系列：DC

工式二阀组安装尺寸图

工式二阀组

工式二阀组，也称为双阀组或仪表二阀组，是一种集成式的过程连接阀组，广泛应用于工业自动化仪表测量系统中，特别是与压力变送器、差压变送器、压力表等仪表配套使用。

其核心功能是为仪表的投用、停用、校准和维护提供一个安全、便捷的操作平台。它通常由两个独立的截止阀（通常是球阀或针阀）和一个（或两个）排污/排气阀组成，并集成在一个共同的阀体上。

工式二阀组主要特点与功能：

安全隔离： 两个截止阀可以分别隔离仪表与过程管道，使得在不停车的情况下能够安全地对仪表进行拆卸、检修或校准。

平衡与泄压： 在操作差压变送器时，通过先打开平衡阀来平衡正负压室的压力，可以有效防止仪表单向过压而损坏。排污/排气阀用于排放过程介质或排除引压管内的气体。紧凑设计： 集成式设计结构紧凑，安装方便，节省空间，减少了多个单独阀门的泄漏点。

流程简化： 标准化的操作流程（如“三阀组”操作中的“先开正压，再关平衡，后开负压”等）确保了操作的安全性和一致性。

广泛应用： 适用于石油、化工、电力、冶金、制药等各种需要过程控制和测量的行业。

工式二阀组典型应用场景：

差压式流量计的压力引压连接

液位变送器的压力接口

压力变送器的过程接口

压力表的过程接口

请注意 (Please Note):

“工式二阀组” 是一个中文行业术语，在英文中更通用的叫法是 Manifold Valve 或 2-Valve Manifold。

更为常见的其实是 五阀组 (5-Valve Manifold) 和 三阀组 (3-Valve Manifold)。二阀组的功能是三阀组/五阀组的简化版，通常缺少一个专用的“平衡阀 (Equalizing Valve)”，其平衡功能可能通过操作两个截止阀的特定顺序来实现，或者其中一个阀兼作排污/排气/平衡阀。在翻译时，概念是相通的。

Product Overview of a Manifold Valve (2-Valve Manifold)

A Manifold Valve, commonly known as a 2-Valve Manifold  Instrument Manifold, is an integrated process connection valve assembly widely used in industrial automation instrumentation systems. It is specifically designed to be paired with instruments such as pressure transmitters, differential pressure (DP) transmitters,  pressure gauges.

Its core function is to provide a safe  convenient operating platform for the commissioning, decommissioning, calibration,  maintenance of instruments. It typically consists of two independent shut-off valves (usually ball valves  needle valves)  one ( two) vent/drain valve(s), all integrated into a common valve body.

Key Features  Functions:

Safe Isolation: The two shut-off valves can isolate the instrument  the process pipeline independently, allowing for safe removal, maintenance,  calibration of the instrument without the need to shut down the entire process.

Equalization  Venting: When operating a differential pressure transmitter, opening the equalizing valve first balances the pressure in the high  low pressure chambers, effectively preventing damage to the instrument  over-pressure on one side. The vent/drain valve is used to evacuate process fluid  purge gases  the impulse lines.

Compact Design: The integrated design is compact, easy to install, saves space,  reduces potential leak points compared to multiple separate valves.

Simplified Procedure: Standardized operating procedures (such as the sequence for operating a 3-valve manifold) ensure operational safety  consistency.

Wide Application: It is suitable for various industries requiring process control  measurement, such as oil & gas, chemical, power generation, metallurgy,  pharmaceuticals.

Typical Applications:

Pressure impulse line connections for differential pressure flow meters.

Pressure interfaces for level transmitters.

Process interfaces for pressure transmitters.

Process interfaces for pressure gauges.