多种多样的阀体结构、材质及阀内件使得Duo-Chek II阀门的用途格外的广泛，适用于许多流体和气体介质应用。主要的市场和典型的应用领域如下：
　　A wide variety of body designs, materials, and trim make Duo-Chek II valves exceptionally versatile and suitable for a multitude of liquid and gas fluid applications. Some of the major markets and typical applications are depicted here.

石油炼制(加工)
Petroleum Refining
氢
裂化
蒸汽
原油
汽油
减粘裂化炉
石脑油
硫
Hydrogen
Cracking
Steam
Crude Oil
Gasoline
Visbreakers
Naphtha
Sulfur

油气生产
Oil and Gas Production
离心式压缩机排放
消防供水管线
油/蒸汽分离
蒸汽和二氧化碳喷射
出油管
井口
Centrifugal Compressor Discharge
Fire Water Lines
Oil/Steam Separation
Steam and CO₂ Injection
Gas/Oil Gathering Systems
Flowlines
Wellheads

石油化工产品
Petrochemicals
乙烯
丙烯
蒸汽
再蒸馏锅(重沸器)
煤气
Ethylene
Propylene
Steam
Reboilers
Gases

化工产品
Chemicals
氯气
光气
芳香族化合物
聚合物
酸
空气分离
腐蚀性流体
Chlorine
Phosgene
Aromatics
Polymers
Acids
Air Separation
Caustics

发电
Power Generation
蒸汽
冷凝
锅炉给水泵
冷却塔
工业用水再循环装置
河水进水口
Steam
Condensate
Boiler Feed Pumps
Cooling Towers
Service Water Recirculators
River Water Intake

钢/初炼金属
Steel/Primary Metals
淬火管
除垢
连铸机
蒸汽
冷凝水
脱模机
电镀
Quench Lines
De-Scaling
Continuous Casters
Steam
Condensate
Strippers
Electro-Galvanizing