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Carbon steel cut-off valve

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The structure of globe valve body is straight through, direct current and right angle. Straight-through structure is the most common structure, but its fluid resistance is the largest. DC fluid has less resistance and is mostly used for fluids with solid particles or high viscosity. The right angle valve body is usually forged, which is suitable for globe valves with smaller pass and higher pressure.

The types of globe valves can be divided into external threaded and internal threaded according to the position of stem threads. According to the flow direction of the medium, there are direct, direct and angular. Globe valves can be divided into packing sealing globe valves and bellows sealing globe valves.

Globe valve is a valve whose closure (disc) moves along the center line of the seat. According to the movement of the disc, the change of the seat opening is proportional to the disc travel. Because the stem opening or closing stroke of this kind of valve is relatively short, and has a very reliable cut-off function, and because the change of the seat opening is proportional to the disc travel, it is very suitable for flow regulation. Therefore, this type of valve is very suitable for cutting or regulating and throttling. The selection principles are as follows: 1. Cut-off valves are suitable for pipelines or devices with high temperature and high pressure media. Such as thermal power plants, nuclear power plants, high temperature and high pressure pipelines of petrochemical systems. 2. Pipeline with lax convection resistance requirements. That is, the pressure loss is not taken into account. 3. Needle valves, instrument valves, sampling valves and Pressure Gauge Valves are optional for small valves. 4. There is flow regulation or pressure regulation, but the accuracy of regulation is not high, and the diameter of the pipeline is relatively small. If the nominal passage is less than 50 mm, the pipeline should be selected.

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