低温气动高压球阀

低温气动高压球阀是一种专为严苛工况设计的特种阀门。它集超低温介质、高压力和气动执行三大特点于一体，主要用于截断或接通在超低温、高压环境下流动的介质（如液化天然气LNG、液氮、液氧、液氩、液态二氧化碳等）。

低温气动高压球阀其核心设计特点和关键技术包括：

低温材料与特殊结构: 阀体、球体、阀杆等主要部件采用耐低温性材料（如不锈钢316L、LCB低温碳钢等），确保在低温下材料的机械性能和密封性不衰减。阀门通常采用长颈阀盖设计，使阀杆填料函远离低温流体，填料密封的稳定性并防止结霜。

高压密封性能: 针对高压工况，采用精加工的金属软密封或特殊高分子材料密封圈，确保在高压差下仍能实现双向零泄漏密封。预紧力设计的阀座弹簧能在温度变化和压力波动时提供持续的密封比压。

低温气动高压球阀气动执行机构: 配备气动活塞式或薄膜式执行机构，通过接入仪表空气源，接收控制信号（如电磁阀控制），实现阀门的快速、远程自动开关控制。执行机构可集成阀门定位器，实现对开度调节。

低温气动高压球阀安全与防护: 可根据需求配备手轮机构、防火结构、防静电装置等。整个阀门的设计充分考虑了低温环境下防冰、防泄漏的安全要求。

低温气动高压球阀应用领域:

主要应用于液化天然气（LNG）接收站、储运设备、空分设备、石化冷区、低温罐车、工业气体储存与输送系统以及其他深冷工业流程。

低温气动高压球阀核心价值:

在超低温和高压的极端条件下，提供安全稳定、快速响应的流体切断解决方案，是现代化低温工业流程自动化的关键设备。

Product Name: Cryogenic Pneumatic High-Pressure Ball Valve

Product Overview:

The Cryogenic Pneumatic High-Pressure Ball Valve is a specialized valve designed for extremely demanding applications. It integrates three key features: cryogenic media handling, high-pressure resistance, pneumatic actuation. It is primarily used to reliably shut off allow the flow of media under ultra-low temperature high-pressure conditions, such as Liquefied Natural Gas (LNG), liquid nitrogen, liquid oxygen, liquid argon, liquid carbon dioxide, etc.

Its core design features key technologies include:

Cryogenic Materials & Special Structure: Main components like the valve body, ball, stem are made of materials with excellent low-temperature resistance (e.g., Stainless Steel 316L, LCB Low-Temperature Carbon Steel) to ensure mechanical properties sealing integrity do degrade at cryogenic temperatures. The valve typically features an extended bonnet design. This keeps the stem packing away the cryogenic fluid, ensuring reliable packing sealing preventing frost formation.

High-Pressure Sealing Performance: For high-pressure services, it employs precision-machined metal soft seals special polymer sealing rings to ensure bidirectional bubble-tight shut-off even under high pressure differentials. The pre-load designed seat spring provides a consistent sealing force during temperature changes pressure fluctuations.

Pneumatic Actuator: Equipped with a pneumatic piston diaphragm actuator. By connecting to an instrument air supply receiving control signals (e.g., a solenoid valve), it enables rapid, remote automatic on/off control. The actuator can be fitted with a positioner for precise modulation of the valve's opening.

Safety & Protection: Can be optionally equipped with a manual handwheel, fire-safe design, anti-static device, etc. The entire valve design fully considers the safety requirements for ice prevention leakage prevention in low-temperature environments.

Applications:

Widely used in LNG receiving terminals, storage transportation equipment, air separation plants, cold sections of petrochemical plants, cryogenic tankers, industrial gas storage transportation systems, other cryogenic industrial processes.

Core Value:

It provides a safe, reliable, fast-response fluid shut-off solution under the extreme conditions of ultra-low temperature high pressure, making it a critical component for automation in modern cryogenic industrial processes.

低温气动高压球阀: Cryogenic Pneumatic High-Pressure Ball Valve

液化天然气 (LNG): Liquefied Natural Gas (LNG)

液氮/液氧/液氩: Liquid Nitrogen / Liquid Oxygen / Liquid Argon

长颈阀盖: Extended Bonnet / Long Stem Bonnet

 双向零泄漏: Bidirectional Bubble-tight Shut-off

气动执行机构: Pneumatic Actuator

活塞式执行机构: Piston Actuator

电磁阀: Solenoid Valve

阀门定位器: Valve Positioner

防静电装置: Anti-static Device

防火结构: Fire-safe Design

手轮机构: Manual Handwheel (Override)