Plug valve

[Essential information]

       Plug valve is closed or plunger shaped rotary valve, through the rotation of 90 degrees to the valve plug on the channel mouth with the valve body on the mouth of the channel or separated from each other, to achieve a valve open or closed. The shape of the valve plug can be cylindrical or conical. In the cylindrical valve plug, the channel is generally rectangular; in the tapered valve plug, the channel is trapezoidal. These shapes make the structure of the plug valve light. The utility model is most suitable for cutting and connecting the medium and for shunting, but according to the applicable property and the erosion resistance of the sealing surface, sometimes the utility model can also be used for throttling.

[Standard parameter]

[Valve features]

1, Plug valve for regular operation, opening and closing fast and light.

2, Plug fluid resistance is small.

3, Plug valve structure is simple, relatively small size, light weight, easy maintenance.

4, Good sealing performance.

5, The direction of installation is not limited, the flow of media can be arbitrary.

6, No vibration, small noise.

[Valve structure drawing]

[Adaptive condition]

According to the structural characteristics of the plug valve and the design can achieve the function, you can choose the following principles.

1, As for the distribution media and change the flow direction of medium, its temperature is not higher than 300℃, Nominal pressure  less than or equal to 1.6MPa,Nominal diameter less than or equal to 300mm, suggested the use of multiple plug valve.

2, Milk, juice, beer and other food enterprises and pharmaceutical factories and other equipment and pipes, it is recommended to use austenitic stainless steel system, compact conic cone plug valve.

3, In oil field exploitation, natural gas field exploitation, pipeline transportation branch pipe, refining and cleaning equipment, nominal pressure level is not more than Class300, nominal diameter is not more than 300mm, it is recommended to use oil seal type conical plug valve.

4, The exploitation of oil and natural gas production, pipeline transportation, refining and pipe cleaning equipment, nominal pressure level is not greater than Class7500, nominal size is not greater than 900mm, the temperature is not higher than 340℃, suggested the use of conical plug valve oil seal.

5, In large scale chemical industry, pipelines and equipment containing corrosive medium, required to open or close the faster the occasion, for nitrate based medium can be used Teflon sleeve conical plug valve seal; for acetic acid based medium, can choose Cr18Ni12Mo2Ti stainless steel Teflon sleeve conical plug valve seal.

6, In gas pipelines, natural gas, HVAC systems and equipment, nominal diameter is less than 200mm, should choose the packed type conical plug.