一、进口低温LNG截止阀概述

进口低温LNG截止阀，也叫低温截止阀，液氮截止阀，液氧截止阀，液氩截止阀，液化天然气截止阀，是指用于低温液体LNG贮运设备的管理系统的截止阀，具有开关灵活、密封可靠的特点，也可用于其他低温和深冷介质的管理系统。

LNG是英语液化天然气（liquefied natural gas）的缩写。主要成分是甲烷。LNG无色、无味、无毒且无腐蚀性，其体积约为同量气态天然气体积的1/600，LNG的重量仅为同体积水的45%左右，热值为52MMBtu/t（1MMBtu=2.52×10^8cal）。LNG是通过在常压下气态的天然气冷却至-162℃，使之凝结成液体。天然气液化后可以大大节约储运空间，而且具有热值大、性能高等特点。

美国威盾VTON主要产品有进口低LNG截止阀，进口低温短袖截止阀，进口低温长袖截止阀，进口低温不锈钢截止阀，进口低温焊接截止阀，进口低温法兰截止阀，进口LNG低温截止阀，进口液氮截止阀，进口液氧截止阀，进口液化天然气截止阀，进口低温深冷截止阀等。主要用于乙烯，液化天然气装置，天然气LPG LNG储罐，接受基地及卫星站，空分设备，石油化工尾气分离设备，液氧、液氮、液氩、二氧化碳低温贮槽及槽车、变压吸附制氧等装置上。

Low temperature LNG shut-off valve, also known as low-temperature shut-off valve, liquid nitrogen shut-off valve, liquid oxygen shut-off valve, liquid argon shut-off valve, liquefied natural gas shut-off valve, refers to the shut-off valve used in the management system of low-temperature liquid LNG storage and transportation equipment. It has the characteristics of flexible opening and closing, reliable sealing, and can also be used in other low-temperature and cryogenic medium management systems.

LNG is the abbreviation for liquefied natural gas in English. The main component is methane. LNG is colorless, odorless, non-toxic, and non corrosive. Its volume is about 1/600 of the same volume of gaseous natural gas. The weight of LNG is only about 45% of the same amount of accumulated water, and its calorific value is 52MMBtu/t (1MMBtu=2.52 x 10 ^ 8cal). LNG is condensed into liquid by cooling natural gas in its gaseous state at atmospheric pressure to -162 ℃. Natural gas liquefaction can greatly save storage and transportation space, and has the characteristics of high calorific value and high performance.

VTON's main products include imported low LNG globe valves, imported low-temperature short sleeved globe valves, imported low-temperature long sleeved globe valves, imported low-temperature stainless steel globe valves, imported low-temperature welding globe valves, imported low-temperature flange globe valves, imported LNG low-temperature globe valves, imported liquid nitrogen globe valves, imported liquid oxygen globe valves, imported liquefied natural gas globe valves, and imported low-temperature cryogenic globe valves. Mainly used in ethylene, liquefied natural gas equipment, natural gas LPG LNG storage tanks, receiving bases and satellite stations, air separation equipment, petrochemical tail gas separation equipment, low-temperature storage tanks and tankers for liquid oxygen, liquid nitrogen, liquid argon, carbon dioxide, and pressure swing adsorption oxygen production equipment.

二、进口低温LNG截止阀参数