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Application and Selection Principle of Stainless Steel Ball Valve

1. Application of stainless steel ball valve


Stainless steel ball valve adopts handle, gear, electric, turbine, pneumatic and other driving methods. Mainly used in oil extraction, pipeline transportation and terminal distribution (the medium of which is gas, oil, hydrocarbon, acid fluid, water), seawater treatment, chemical industry high-load environment, safe and reliable, even in harsh environments. Widely used in petroleum, gasoline, liquefied gas, natural gas, liquefied petroleum gas, petrochemical, steel plants, heating pipes, etc. Different stainless steel ball valves are selected under different working conditions.


2. Selection principle of stainless steel ball valve


(1) Dispersed fully welded ball valve stem anti-flying structure


As the medium passes through the valve, the pressure in the cavity of the stainless steel ball valve body may push the valve stem out. In order to prevent this from happening, a boss structure is arranged at the lower part of the valve stem. In this way, even if the packing and thrust bearing are burned or damaged due to other reasons, the medium pressure in the valve body will make the valve stem boss and the valve body seal in close contact, preventing a large amount of medium from leaking from the damaged packing part. .


(2) Dispersive all-welded ball valve anti-static device


When the valve is operated, due to the friction between the ball and the valve seat of non-metallic materials such as teflon, electrostatic charge is generated and accumulated in the ball. In order to prevent the generation of static sparks, an anti-static device is specially installed on the valve to export the generated static electricity.


(3) Fireproof structure of diffused all-welded ball valve


The stainless steel ball valve seat adopts a unique structure. When a fire occurs, when the non-metallic sealing surface material is burned, the metal ring uses the elastic force of the spring to push the valve seat and the ball to fit and seal, thereby preventing the spread of fire and the outflow of medium.


(4) There is no leakage structure in the middle flange of the diffused all-welded ball valve


The connection part between the valve body and the left body is sealed by a gasket. In order to prevent the leakage of the seal caused by fire, high temperature or vibration and other factors, it is specially designed so that the valve body and the left body are in contact with metal to form a stop flange to ensure that there is no external leakage. leak.


As a professional industrial valve manufacturing company, Vidulli's commonly used materials include Titanium, Zirconium, Nickel, Hastelloy, Monel, Inconel, Nickel Aluminum Bronze, Alloy 20, Alloy 904L, Duplex/Super Duplex Phase stainless steel, tantalum and other high alloys, stainless steel. Vidulli stainless steel ball valves can withstand ultra-high pressure and ultra-high temperature, and are widely used to control the flow of fluids such as air, water, steam, corrosive media, mud, oil, liquid metal and radioactive media. Welcome to online consultation!

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