


DBB法兰针型阀
DBB法兰针型阀(Double Block & Bleed Flanged Needle Valve)是一种集双截断泄放(DBB)功能与精密流量调节于一体的高性能阀门。其采用法兰连接方式,适用于需要严格密封、安全隔离及精细控制的严苛工况,如石油、天然气、化工、电力等行业的高压、高温或腐蚀性介质系统。
DBB法兰针型阀核心特点
DBB功能设计:
双截断(Double Block):通过两道独立密封结构(阀座+阀针)实现双重隔离,确保介质零泄漏。
泄放(Bleed):阀体中腔设有泄放口,可排放残留介质,便于安全检修或验证密封性。
DBB法兰针型阀精密流量调节:
针型阀芯设计,实现微小流量的高精度调节,适用于仪表测量或过程控制。
DBB法兰针型阀法兰连接结构:
符合ANSI、DIN、JIS等标准法兰,安装稳固,承压能力强,适用于高压管道系统。
DBB法兰针型阀耐严苛工况:
阀体材质可选不锈钢(304/316)、合金钢等,耐腐蚀、耐高温高压,寿命长。
DBB法兰针型阀典型应用
石油天然气:井口装置、计量系统、长输管线。
化工行业:腐蚀性介质(酸、碱)的隔离与调节。
电力系统:蒸汽、导热油管路的压力控制。
(注:术语符合API 6D/ASME标准,适配国际工程需求)
DBB Flanged Needle Valve Product Overview
The DBB Flanged Needle Valve (Double Block & Bleed Flanged Needle Valve) integrates Double Block & Bleed (DBB) functionality with precise flow control, designed for critical isolation regulation in high-pressure, high-temperature, corrosive media systems (e.g., oil & gas, chemical, power industries).
Key Features
DBB Design:
Double Block: Dual independent seals (valve seat + needle) ensure zero leakage.
Bleed Port: Mid-body vent for safe depressurization seal verification.
Precision Flow Control:
Needle-shaped plunger enables fine-tuned flow adjustment for instrumentation process control.
Flanged Connection:
Complies with ANSI, DIN, JIS standards, offering robust installation high-pressure resistance.
Rugged Performance:
Materials include stainless steel (304/316), alloy steel, etc., resistant to corrosion extreme conditions.
Typical Applications
Oil & Gas: Wellhead equipment, metering systems, pipelines.
Chemical Industry: Isolation control of corrosive fluids (acids, alkalis).
Power Plants: Pressure regulation in steam/thermal oil pipelines.
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