Metal Seated Lubricated Plug Valve

Product Introduction

The plug valve is a kind of valve that the closing part - the plug rotates 90 degrees around the center line of the valve body to achieve the purpose of opening and closing. It is used to cut off, distribute and change the direction of the flow of the medium on the pipeline. Depending on the nature of the medium and the erosion resistance of the valve/door sealing surface, it can sometimes be used for throttling. Flange end plug oil seal and lubricating plug valve are shown in the figure. Plug valve is a similar type as ball valves, but with a larger sealing area than ball valves, so with better sealing performance, but with higher torque, so plug valves is not suggested for very big size valves. Unlike ball valves or non-lubricated plug valves, Lubricated plug valves are designed with grooves in the plug that retain a lubricant. When in use, the lubricant prevents sticking and provides a hydraulic force that helps lift the plug and reduce the effort required for rotary operation. Additionally, the lubricant provides the seal between the seating surfaces of the valve body and plug so that a tight shutoff can be achieved. Plug valves is widely used in oil and gas transportation, petrochemical, chemical, pharmacy, etc.