Z-shaped internal thread plunger valve U11 UJ11 connection is divided into non-metallic seals, metal seals two categories, in addition, the external thread connection plunger valve its shape is divided into Z-shaped and waist drum shape two categories, its internal structure is exactly the same, the use is the same, mainly used in metallurgy, electricity, chemical, oil refining, food and other industries. The pressure is within 16-25kgf/cm2, and the temperature is below 250 °C for opening and closing small diameter pipelines such as water, steam, oil and other small diameter pipelines for opening and closing to adjust the flow.Z-shaped internal thread plunger valve U11 UJ11 connection is divided into non-metallic seals, metal seals two categories, in addition, the external thread connection plunger valve its shape is divided into Z-shaped and waist drum shape two categories, its internal structure is exactly the same, the use is the same, mainly used in metallurgy, electricity, chemical, oil refining, food and other industries. The pressure is within 16-25kgf/cm2, and the temperature is below 250 °C for opening and closing small diameter pipelines such as water, steam, oil and other small diameter pipelines for opening and closing to adjust the flow.