法兰式二阀组

入口：1/2NPTF或(3/4NPTF).

出口：圆法兰面RF RJ。

泄放口：1/4NPTF或（1/2NPTF）

压力等级:150LB～2500LB

适用温度:-65°F(-54℃) —450°F(232℃) —1200°F(648℃)

法兰式二阀组

法兰式二阀组是一种结构坚固、密封性能好的集成式过程阀门组件。其核心特征是阀体的过程接口采用标准法兰（如国标GB、美标ANSI、德标DIN等），通过螺栓与工艺管道或设备的配对法兰连接。它将两个独立的截止阀（通常为闸阀、球阀或截止阀）集成在一个坚固的阀体上，为压力、液位或流量仪表提供高强度、高密封性的隔离和在线维护功能。

法兰式二阀组专为中高压、高温、危险或有毒介质等苛刻工况设计，是石油、化工、电力等行业中确保系统安全、稳定和零泄漏的关键部件。

法兰式二阀组主要特点与功能：

法兰连接 (Flanged Connections): 阀体进出口配备标准法兰面，通过螺栓螺母与管道法兰紧密连接。这种连接方式结构坚固，能承受高压力、高机械应力及温度波动，密封稳定性极高，是实现零泄漏方案。

双阀隔离 (Dual Block Isolation): 两个独立的截止阀可以很好地切断工艺介质，实现对所连接仪表隔离，确保在不停车的情况下进行仪表的在线维护、校验或更换，安全等级高。

高强度阀体 (High-Strength Body): 通常采用铸钢、不锈钢或合金钢整体铸造或锻造而成，具有极高的机械强度和承压能力，适用于苛刻的工业环境。

法兰式二阀组广泛的适用性 (Broad Applicability): 法兰连接标准齐全，可轻松集成到各种现有的管道系统中。根据阀内件材质的选择，可适用于蒸汽、水、油品、化学品及各种腐蚀性介质。

法兰式二阀组维护方便 (Ease of Maintenance): 法兰连接便于拆卸和重新安装，方便对阀门本身或整个系统进行维护。

法兰式二阀组高性能应用 (High-Performance Application): 主要用于石油天然气、炼化、长输管道、电站、大型化工装置等对安全和稳定性要求极高的场合。

法兰式二阀组与内螺纹二阀组的对比 (Comparison with Female Threaded Manifold)

法兰式二阀组特性内螺纹二阀组法兰式二阀组连接方式螺纹连接法兰螺栓连接结构强度一般极高密封性能好，（实现零泄漏）承压能力中低压中高压、高压适用介质普通、非危险介质危险、有毒、高温介质成本经济较高典型应用HVAC、水处理、一般工业石油化工、电站、关键装置

法兰式二阀组常见类型 (Common Types):

法兰式双闸阀组 (Flanged Dual Gate Valve Manifold): 适用于要求直通流道、压力损失小的场合。

法兰式双球阀组 (Flanged Dual Ball Valve Manifold): 操作迅速，密封性好。

法兰式双截止阀组 (Flanged Dual Globe Valve Manifold): 适用于需要调节和稳定密封的场合，但压损较大。

Product Overview of a Flanged 2-Valve Manifold

A Flanged 2-Valve Manifold is a robust, high-integrity integrated process valve assembly. Its core feature is the use of standard flanges (e.g., GB, ANSI, DIN standards) on the process connections, which are bolted to matching flanges on the process piping equipment. It integrates two independent block valves (typically gate, ball, globe valves) into a sturdy body, providing high-strength, high-seal isolation online maintenance capabilities for pressure, level, flow instruments.

This manifold is specifically engineered for demanding services such as medium to high pressure, high temperature, hazardous toxic media. It is a critical component in ensuring system safety, reliability, zero leakage in industries like oil & gas, chemical, power generation.

Key Features Functions:

Flanged Connections: The inlet outlet ports feature standard flange faces, connected tightly to pipeline flanges via bolts nuts. This connection offers robust construction, capable of withstanding high pressure, high mechanical stress, temperature fluctuations. It provides exceptional sealing reliability is the preferred choice for zero-leakage applications.

Dual Block Isolation: The two independent block valves can reliably shut off the process medium, achieving positive isolation of the connected instrument. This allows for online maintenance, calibration, replacement of the instrument without process shutdown, ensuring a high safety level.

High-Strength Body: Typically constructed cast steel, stainless steel, alloy steel via integral casting forging, it possesses excellent mechanical strength pressure-bearing capacity, suitable for harsh industrial environments.

Broad Applicability: With comprehensive flange standards available, it can be easily integrated into various existing piping systems. Depending on the trim material selection, it is suitable for steam, water, oils, chemicals, various corrosive media.

Ease of Maintenance: The flanged connection facilitates disassembly reassembly, making maintenance on the valve itself the entire system more convenient.

High-Performance Application: Primarily used in applications with utmost demands for safety reliability, such as oil & gas production, refineries, long-distance pipelines, power stations, large-scale chemical plants.