Introduction to insulated three-way asphalt plug valves

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The high-temperature heat-conducting oil mixed asphalt three-way valve is based on a plug valve, with a metal jacket welded to the outside of the valve body; it is available in two-way and three-way versions. Jacket connections are provided on both sides of the valve body, allowing steam, heat transfer oil, or other superheated gases to be injected in order to prevent the asphalt from solidifying at room temperature. The asphalt plug valves are coated with high-temperature paint, which makes the paint surface less likely to change color or peel off. Key features: 1. The asphalt plug valve is a thermal insulation component valve used in equipment handling substances that are prone to solidification, such as asphalt, heavy oil, and thick fluids. There is no other space within this valve apart from the flow channel; the medium does not remain trapped in the valve chamber after passing through. 2. The exterior of the valve body is equipped with an insulating layer, and it can be heated using steam or heat transfer oil; even when the external temperature drops below zero degrees, the valve still ensures unobstructed flow of the medium within its passages, preventing freezing. 3. The valve is simple to operate, flexible and convenient; it can rotate 90° to shut off or connect the fluid in the pipeline. 4. Product design and manufacturing standards: GB/T22130-2008; features a rational structure and fast opening/closing speed. 5. The valve body is made of cast steel suitable for high temperatures, with a temperature tolerance of ≤425°C and a pressure rating of PN≤42.0MPa. 6. After the sealing surface is finely machined, it is ground with high precision against the valve core, ensuring reliable sealing. 7. The insulation-connected end of the valve uses flange connections to prevent heat-conducting media from causing thermal expansion through the insulation layer, which could lead to leakage of the insulation material. It achieves a better heating effect. Working principle: 1. The asphalt plug valve features a thermal insulation jacket; an external heat source is used to circulate heat around the valve, effectively preventing temperature loss of the medium as it passes through the valve and thus maintaining its temperature. 2. It is mainly used in various systems such as those in the petroleum, chemical, and asphalt industries to prevent the transport of high-viscosity fluids that would solidify under normal conditions.