DBB法兰二阀组

DBB法兰二阀组

DBB法兰二阀组是一种集成式的过程仪表阀门组件，专为压力、差压变送器、压力开关等现场仪表的安装、校验、排污和隔离而设计。其名称“DBB”代表了其关键功能特性：Double Block Bleed，即双截断与泄放。

该阀组由两个隔离阀（Block Valves） 和一个泄放阀/排污阀（Bleed Valve） 集成在一个共同的阀体上，并通过法兰与过程管道连接。通过操作两个隔离阀，可以实现对主管道的双重隔离；通过操作中间的泄放阀，可以安全地排放两阀之间 trapped 的介质，从而验证上游或下游隔离阀的密封性，并为仪表维护提供一个安全的环境。

其核心价值在于提高安全性、简化操作、节省空间，能够在不影响工艺流程的情况下，安全地对连接的仪表进行在线维护、校准或更换。

DBB法兰二阀组主要特点：

双截断与泄放（DBB）： 提供双重隔离保障，并可通过泄放口安全地验证密封性和排放腔体内介质。

集成式设计： 将多个功能阀集成于一体，结构紧凑，减少泄漏点，节省安装空间。

法兰连接： 标准法兰接口，便于安装和拆卸，连接强度高，密封稳定。

安全维护： 为仪表维护、校验和零点迁移提供安全、便捷的操作条件，无需工艺停车。

DBB法兰二阀组广泛应用： 可与各种型号的压力/差压变送器、压力开关、压力表等配套使用。

DBB法兰二阀组典型应用：

广泛应用于石油、天然气、化工、电力、制药等行业的过程测量与控制系统，安装在压力、流量、液位测量点的取压管路上，是让安全仪表系统（SIS）和过程控制稳定性的关键部件。

Flanged DBB Double Block Bleed Manifold Product Overview

A Flanged DBB Double Block Bleed Manifold is an integrated process instrumentation valve package specifically designed for the installation, calibration, venting/draining, isolation of field instruments such as pressure/differential pressure transmitters pressure switches. The acronym "DBB" denotes its key functional feature: Double Block Bleed.

This manifold integrates two isolating valves (Block Valves) a vent/drain valve (Bleed Valve) onto a common body connects to the process piping via flanges. By operating the two block valves, double isolation the main process line is achieved. Operating the center bleed valve allows for the safe evacuation of any trapped medium between the two seals, enabling verification of the sealing integrity of the upstream downstream block valve creating a safe environment for instrument maintenance.

Its core value lies in enhancing safety, simplifying operation, saving space. It allows for the safe online maintenance, calibration, replacement of connected instruments without interrupting the process flow.

Key Features:

Double Block Bleed (DBB): Provides dual isolation assurance allows for safe verification of seal integrity evacuation of the cavity via the bleed port.

Integrated Design: Combines multiple functional valves into a single, compact unit, reducing potential leak points saving installation space.

Flanged Connection: Standard flanged ends facilitate easy installation removal, offering high connection strength reliable sealing.

Safe Maintenance: Provides a safe convenient means for instrument maintenance, calibration, zero checking without requiring process shutdown.

Wide Applicability: Compatible with various models of pressure/DP transmitters, pressure switches, pressure gauges.

Typical Applications:

Widely used in process measurement control systems across industries such as oil & gas, chemical, power generation, pharmaceuticals. It is installed on impulse lines for pressure, flow, level measurement points, serving as a critical component for ensuring the reliability of Safety Instrumented Systems (SIS) process control.