Plug valve principle plug valve structure plug valve feature plug valve application plug valve construction

The plug valve is a closing or plunger-shaped rotary valve that opens or closes by rotating the passage port on the valve plug 90 degrees or the same as the passage port on the valve body. The plug of the plug valve may be cylindrical or conical in shape. In a cylindrical valve plug, the passage is generally rectangular; in a tapered valve plug, the passage is trapezoidal. These shapes make the structure of the plug valve light, but at the same time cause some loss. The plug valve zui is suitable for use as a shut-off and closing medium as well as for shunting, but can sometimes be used for throttling depending on the nature of the application and the erosion resistance of the sealing surface. It is also commonly used for media with suspended particles due to the wiping action between the sealing surfaces of the plug valve and the complete contact with the flowing medium during full opening. Another important feature of the plug valve is that it is easy to accommodate multi-channel construction so that one valve can achieve two, three, or even four different flow paths. This simplifies the piping system design, reduces valve usage, and some of the connection accessories needed in the equipment.

Plug valve use: Plug valves are widely used in oilfield mining, transportation and refining equipment, and are also widely used in petrochemical, chemical, gas, natural gas, liquefied petroleum gas, HVAC industry and general industry. The passage of the plug valve can take many forms. A common straight-through type is primarily used to shut off fluids. Three-way and four-way plug valves are suitable for fluid commutation. The opening and closing member of the plug valve is a perforated cylinder that rotates about an axis perpendicular to the passage to achieve the purpose of opening and closing the passage. Plug valves are primarily used to open and close pipes and equipment media.

The main advantages of the plug valve are as follows: 1. It is suitable for frequent operation, quick opening and closing, and light. 2 , the fluid resistance is small. 3 , simple structure, relatively small size, light weight, easy to repair. 4 , good sealing performance 5 , not limited by the installation direction, the flow direction of the medium can be arbitrary. 6 , no vibration, low noise.

   The plug valve can be divided into four types according to the structure: a compact plug valve, a self-sealing plug valve, a stuffing plug valve and a oil-filled plug valve. According to the channel form, it can be divided into three types: straight-through, three-way and four-way.