一、进口液氩止回阀介绍

进口液氩止回阀Liquid argon check valve又称低温逆止阀、低温单向阀、低温逆流阀、和低温背压阀，是指采用经过低温深冷的不锈钢材质，在低温贮槽上或者低温管道系统，依靠介质本身流动而自动开、闭阀瓣，防止低温介质液氧，液氮，液氩，液化天然气，LO2、LN2、LAR、LNG等倒流的阀门。

液氩纯度99.9995%，微溶于水，熔点为-189.2℃，沸点为-185.7℃，临界温度为-122.3℃，临界压力为4.86MPa，燃烧性能为不可燃，遇高热，容器内压增大，有爆炸的危险。

美国威盾VTON低温止回阀结构紧凑、体积小、重量轻，防止倒流零泄露，稳定性好。

美国威盾VTON低温止回阀主要产品有进口液氩止回阀，进口低温单向阀，进口低温逆止阀，进口液氩止回阀，进口低温焊接止回阀，进口低温法兰止回阀，进口LNG低温止回阀，进口液氮止回阀，进口液氩止回阀，进口液化天然气止回阀，进口低温深冷止回阀等。

Liquid argon check valve, also known as low-temperature check valve, low-temperature one-way valve, low-temperature backflow valve, and low-temperature backpressure valve, refers to a valve made of stainless steel material that has undergone low-temperature deep cooling. It is automatically opened and closed on a low-temperature storage tank or low-temperature pipeline system, relying on the flow of the medium itself to prevent the backflow of low-temperature medium such as liquid oxygen, liquid nitrogen, liquid argon, liquefied natural gas, LO2, LN2, LAR, LNG, etc.

Liquid argon has a purity of 99.9995% and is slightly soluble in water. Its melting point is -189.2 ℃, boiling point is -185.7 ℃, critical temperature is -122.3 ℃, critical pressure is 4.86 MPa, and its combustion performance is non combustible. When exposed to high heat, the pressure inside the container increases, posing a risk of explosion.

The VTON low-temperature check valve has a compact structure, small volume, and light weight, preventing backflow and zero leakage, and good stability.

二、进口液氩止回阀性能参数

三、进口液氩止回阀特点

1、低温止回阀经过低温深冷处理，能耐-196℃低温。

2、低温止回阀阀瓣材料经过镀铬或氮化处理，提高阀杆表面硬度，提高填料密封的可靠性。

3、低温止回阀用的垫片具有在常温下、低温状态及温度变化下能可靠密封性和复原性。

4、低温止回阀采用优质的美国威盾的各种零部件材料，能达到流体逆向零泄露，防止倒流。

1. The low-temperature check valve has undergone low-temperature cryogenic treatment and can withstand -196 ℃ low temperature

2. The material of the low-temperature check valve disc is treated with chrome plating or nitriding to improve the surface hardness of the valve stem and enhance the reliability of the packing seal.

3. The gasket used for low-temperature check valves has reliable sealing and recovery properties under normal temperature, low-temperature conditions, and temperature changes.

4. The low-temperature check valve uses high-quality materials from various components of the American shield, which can achieve zero fluid leakage in reverse flow and prevent backflow.