What are the advantages and disadvantages of oxygen truncation valve? The type of oxygen truncation valve is divided into external thread and internal thread type according to the position of the valve stem thread. According to the direction of the medium, there are direct, DC and corner. The truncant valve is divided in the form of sealing, and the sealing valve and the sealing truncation valve are available.
The structure of the oxygen cut -off valve body has direct, DC and right -angle formulas. The direct formula is the most common structure, but its fluid resistance is the most resistant. DC fluid resistance is small, and is mostly used for fluids containing solid particles or large viscosity. The right -angle valve body is mostly forged, which is suitable for the cut -off valve that is smaller and more stressful.
The oxygen truncation valve is a compulsory sealing valve. Therefore, when the valve is closed, it is necessary to apply pressure to the valve petals to force the seal without leakage. When the medium enters the valve six below the valve petals, the resistance that the operating force needs to be overcome is the friction of the valve stems and the filling and the thrust generated by the pressure of the medium. The diameter of the rod should be large, otherwise there will be a fault in the roof of the valve stem.
From the emergence of the self -sealed valve, the medium flow of the oxygen truncation valve is changed from above the valve flap to enter the valve cavity. At this time, under the action of the medium pressure, the force of the valve is low, and the force of the valve is large. Reduce accordingly. At the same time, under the action of the medium, this form of valve is also tight. my country's valve "Three Hua Give" once stipulated that the flow of the deeper valve is all from top to bottom. When the oxygen truncation valve is turned on, the opening height of the valve petals is 25%to 30%of the nominal diameter, and the flow has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the full position of the trial valve should be determined by the itinerary of the valve petals.
1. The advantages of oxygen truncation valve:
(1) Good sealing, small friction between the cover, and long life.
(2) Simple structure, more convenient manufacturing and maintenance.
(3) Little working itinerary and short opening time.
Second, the disadvantage of oxygen truncation valve:
(1) Poor adjustment performance.
(2) The fluid resistance is large, and it takes greater force when opening and closing.
(3) It is not suitable for the medium with large particles, large viscosity, and scorching.