Ball valve issues
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What is a thermal insulation ball valve? How is it represented on the drawing? Please, experts, help me out
Are there ball valves with separate insulation? As a component of the pipeline, the ball valve should be insulated together with the pipeline, and the insulation should be in the form of a removable insulating box. Or does the poster mean a jacketed ball valve?
The drawings show different things; it depends on your design agency
Insulated ball valves are certainly available, so we’ll use them. It involves adding a thermal insulation shell outside the existing ball valve, with steam flowing inside it.
A insulated ball valve is used when it is necessary to transport materials that tend to crystallize at room temperature; in such cases, it is common to use insulated pipes with steam flowing inside the jacket, and the corresponding valve for this purpose is the insulated ball valve (as ball valves are less prone to clogging). There are various ways of representing this valve in drawings, but you simply need to indicate it in the legend
Indeed, the liquid sulfur pipelines in the sulfur unit of refineries use jacketed ball valves
It’s a jacketed valve, which uses the medium in the jacket layer to maintain the temperature of the fluid
Is it referring to a jacketed valve, the type of valve that has two small tubes on its body for introducing and removing the insulation medium? As long as the pipes connected before and after it are jacketed, then a jacketed valve can be used. Generally, jackets are utilized during startup and shutdown processes; the specific choice depends on the type of medium involved.