Plug Valves

Plug Valves

Introduction:

Plug valve is a closed piece or plunger shaped rotary valve, which can be opened or closed by turning 90 degrees to make the passage port on the valve plug connect or separate from the passage port on the valve body.
Its valve plug can be cylindrical or conical in shape. In the cylindrical valve plug, the channel is generally rectangular; In the tapered plug, the passage is trapezoidal. These shapes make the structure of the plug valve lightweight. Best suited as a cut-off and switching medium to
And split flow, but it can also be used for throttling sometimes according to the applicable properties and erosion resistance of the sealing surface.

Structural features:

1. Soft seal plug valves are often used in harsh environments such as corrosive, highly toxic and highly hazardous media, where leakage is strictly prohibited, and where valve materials will not pollute the media. The valve body can be made of carbon steel, alloy steel and stainless steel according to the working medium.
2. The oil stream lubricating hard sealing plug valve can be divided into conventional oil stream lubricating plug valve and pressure balanced plug valve. The specially made lubricating grease is injected from the top of the plug body between the conical hole of the valve body and the plug body to form an oil film to reduce the opening and closing torque of the valve and improve the sealing performance and service life. Its working pressure can reach 64MPa, the maximum working temperature can reach 325 degrees, and the maximum diameter can reach 600mm.
3. The lift plug valve has a variety of structural forms. The lift plug valve can be divided into soft seal and hard seal according to the material of the sealing surface. Its basic principle is to make the cock rise when it is opened, and the friction between the cock and the sealing surface of the valve body can be reduced when the cock is rotated 90 degrees to the full opening of the valve; When closing the valve, turn the cock 90 degrees to the closed position, and then drop it to contact the sealing surface of the valve body to seal.
4. The three-way and four-way plug valves are suitable for changing the flow direction of medium or distributing medium in Shanghai engineering equipment. According to the requirements of operating conditions, soft seal bushing or soft seal and hard seal poppet valve can be selected.

Product Showing: