低温调压阀说明：

      低温调压阀是一种在低温深冷场合使用的调节阀。适用于-196～+80℃低温壮态下的介质(如液氧、液氮等)的调节。低温减压阀适用于氧气、氮气、氢气、氩气等气体。这些气体一般都是贮存在专用的高压气体钢瓶中。使用时通过减压阀使气体压力降至实验所需范围，再经过其它控制阀门细调，使气体输入使用系统。

低温调压阀主要零部件:
      阀体、阀盖：不锈钢
      阀瓣、膜片：不锈钢
      密封圈：PTFE或PCTFE 

低温调压阀产品规范:
      公称压力：2.5MPa
      公称通径：6mm、8mm、10mm
      适用介质：LO2、LN2、LAr、LNG、LC2H4等
      适用温度：-196～+80℃
      连接方式：螺纹
      调压范围：344Ba-0.1MPa～0.3MPa
      344Bb-0.2MPa～1.0MPa
      344Bc-0.8MPa～1.6MPa

低温调压阀技术参数：
      公称压力：2.5MPa
      公称通径：15mm～50mm
      适用介质：LO2、LN2、LAr、LNG、LC2H4等
      适用温度：-196～+80℃
      连接方式：螺纹
      调压范围：333Ba-0.1MPa～0.3MPa
      333Bb-0.2MPa～1.0MPa
      333Bc-0.8MPa～1.6MPa

低温调压阀

低温调压阀（也称低温减压阀）是低温介质输送系统中的核心压力控制装置。它通过自动调节阀门的开度，将入口端不稳定的高压低温流体（如LNG、液氮、液氧等）减压并稳定至系统所需的较低、安全的出口压力，同时确保介质在减压过程中保持液态或气态，满足下游设备或终端用户的工况要求。

低温调压阀核心特点：

超低温适应性：阀体、阀内件及密封材料均采用深冷处理过的奥氏体不锈钢（如316L）、因科镍尔（Inconel）等，确保在-196°C及以下的极端低温中保持力学性能和密封性。

精准稳压：采用先导式（Pilot-operated）或直接作用式（Direct-acting）等结构，配备高性能膜片或活塞执行机构，对压力变化敏感，调节精度高，出口压力稳定。

绝热设计：通常采用长颈阀盖或真空夹套（Vacuum Jacket）设计，有效隔绝外部热量传入，防止冷量损失，减少气化，确保阀门正常操作。

低温调压阀安全稳定：内置安全功能，如内置泄压阀（Internal Relief Valve）、过流保护，确保在下游阻塞或超压等故障工况下的系统安全。

多级减压能力：针对高压差工况，可采用多级减压设计，逐级降低压力，有效控制流速、气化和噪音，防止空化气蚀。

低温调压阀典型应用：

LNG气化站：将储罐来的高压LNG减压至管网输送压力。

低温调压阀LNG加注站：为LNG车辆或船舶加注时，提供稳定压力的燃料。

低温调压阀空分装置：液氧、液氮储罐的出口压力调节。

低温罐车：卸车时的压力控制。

BOG回收系统：对蒸发气（BOG）进行压力调节。

Product Overview of Cryogenic Pressure Regulating Valves

A Cryogenic Pressure Regulating Valve (also known as a Cryogenic Pressure Reducing Valve) is a core pressure control device in cryogenic media transfer systems. It automatically adjusts the valve opening to precisely reduce stabilize the unstable high-pressure cryogenic fluid (e.g., LNG, liquid nitrogen, liquid oxygen) the inlet to a lower, safe outlet pressure required by the system. Simultaneously, it ensures the media remains in its liquid gaseous state during pressure reduction, meeting the operational requirements of downstream equipment end-users.

Key Features:

Cryogenic Adaptation: Valve body, trim, sealing materials are made deep-cryo treated austenitic stainless steel (e.g., 316L), Inconel, etc., ensuring mechanical properties sealing integrity at extreme temperatures down to -196°C below.

Precise Pressure Stabilization: Utilizes structures such as Pilot-operated Direct-acting, equipped with high-performance diaphragm piston actuators. These are highly sensitive to pressure changes, offering high regulating accuracy stable outlet pressure.

Thermal Insulation Design: Often features an extended bonnet a Vacuum Jacket design to effectively isolate external heat ingress, prevent cold loss, minimize vaporization, ensure normal valve operation.

Safety Reliability: Incorporates built-in safety features like an Internal Relief Valve over-current protection to ensure system safety during fault conditions such as downstream blockage overpressure.

Multi-Stage Pressure Reduction: For high differential pressure applications, a multi-stage reduction design can be adopted to gradually lower the pressure, effectively controlling flow velocity, vaporization, noise, while preventing cavitation.

Typical Applications:

LNG Vaporization Stations: Reducing the pressure of high-pressure LNG storage tanks to pipeline transmission pressure.

LNG Fueling Stations: Providing stable pressure fuel for LNG vehicles ships during refueling.

Air Separation Units: Regulating outlet pressure liquid oxygen liquid nitrogen storage tanks.

Cryogenic Tankers: Pressure control during unloading operations.

BOG Recovery Systems: Pressure regulation for Boil-Off Gas (BOG).