产品名称：直接安装内外螺纹式两阀组

产品型号：DTCT3

所属类别：仪表阀组 >> 两阀组

所属系列：DT

内外螺纹式两阀组安装尺寸图

螺纹式二阀组

螺纹式二阀组是一种通过螺纹接口进行连接的标准集成阀组，它将两个截止阀（如球阀或针阀）集成在一个阀体上，主要用于压力、差压变送器及压力表等仪表的过程连接。其核心作用是实现仪表的在线隔离、零点校准、排污泄压及过程连接，保障系统安全与维护便捷。

该阀组结构紧凑、安装灵活，适用于中低压工况，是工业自动化测量系统中应用广泛的阀组类型之一。

Product Overview of a Threaded 2-Valve Manifold

A Threaded 2-Valve Manifold is a standard integrated valve assembly connected via threaded interfaces. It combines two block valves (such as ball valves needle valves) into a single body, primarily used for process connections to instruments like pressure transmitters, differential pressure transmitters, pressure gauges. Its core functions include online isolation, zero-point calibration, venting/draining, process connection for instruments, ensuring system safety maintenance convenience.

This manifold features a compact structure flexible installation, making it suitable for medium low-pressure applications. It is one of the most widely used valve types in industrial automation measurement systems.

核心特点与功能 (Key Features Functions)

螺纹式二阀组螺纹连接 (Threaded Connections)

接口标准：阀组进出口采用螺纹连接（如NPT、G/BSPP、BSPT等），可直接与带外螺纹的管道、仪表或接头配合，无需额外转接。

安装便捷：螺纹连接方式简化了安装流程，适用于空间受限的场合。

螺纹式二阀组双阀隔离与控制 (Dual Valve Isolation Control)

隔离功能：两个独立的截止阀可切断工艺介质，实现仪表的在线隔离与维护。

调节功能：若采用针阀，可准确调节流量或压力，适用于校准或测试场景。

螺纹式二阀组集成泄压设计 (Integrated Pressure Relief Design)

泄压通道：阀体通常设计有泄压孔或可通过轻微松动连接螺纹实现安全泄压，防止残留压力导致拆卸风险。

螺纹式二阀组紧凑结构与经济性 (Compact Structure Cost-Effectiveness)

空间优化：一体化设计减少连接点，节省安装空间，降低泄漏风险。

低成本：相比法兰式阀组，螺纹连接成本更低，适用于预算有限的项目。

螺纹式二阀组广泛应用场景 (Wide Application Scenarios)

行业：石油化工、水处理、 HVAC（暖通空调）、轻工业等。

介质：水、空气、油品及非强腐蚀性化学介质。

Key Features Functions:

Threaded Connections

Standards: Inlet outlet ports comply with threaded standards (e.g., NPT, G/BSPP, BSPT), enabling direct connection to pipes, instruments, fittings with external threads without additional adapters.

Easy Installation: Threaded connections simplify installation, ideal for space-constrained environments.

Dual Valve Isolation Control

Isolation Function: Two independent block valves shut off process media, allowing online isolation maintenance of instruments.

Flow Regulation: If equipped with needle valves, precise flow/pressure adjustment is possible for calibration testing.

Integrated Pressure Relief Design

Venting Mechanism: The body often includes a vent port allows safe pressure relief by slightly loosening threads, preventing hazards during disassembly.

Compact Cost-Effective

Space Efficiency: Integrated design reduces connection points, saving space minimizing leakage risks.

Low Cost: More economical than flanged manifolds, suitable for budget-conscious projects.

Wide Applications

Industries: Oil & gas, water treatment, HVAC, general industry.

Media: Water, air, oils, non-corrosive chemicals.

典型应用示例 (Typical Application Example)

压力变送器安装 (Pressure Transmitter Installation):

[Process Pipe with Male Thread] → [Threaded 2-Valve Manifold] → [Pressure Transmitter]

操作流程 (Operation Sequence):

正常运行：双阀开启。

隔离仪表：关闭双阀，切断介质。

泄压：通过泄压孔或松动螺纹释放阀组内压力。

拆卸/校准：安全拆卸仪表或进行在线校准。

可选类型 (Optional Types)

双球阀型 (Dual Ball Valve)：快速启闭，适用于频繁操作。

双针阀型 (Dual Needle Valve): 准确控制，适用于校准场景。

球阀+针阀组合型 (Ball + Needle Valve): 平衡隔离与调节需求。

总结 (Summary)

螺纹式二阀组以其实用性、经济性和灵活性成为仪表连接中的主流选择，尤其适合中低压、非极端工况的系统。正确选型（材质、压力等级、螺纹标准）可确保其长期稳定运行。