The throwing deadline is widely used on the channels of oil, natural gas, gas, oil, oil liquefied gas refining, airport, chemical, oil and gas storage and transportation.
Slotting deadline for empty valve standards
Applicable standard interception valves are only applicable to full -opening and full levels, and are not allowed to regulate and save.The truncant valve is a compulsory sealing valve, so 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 under the valve petals, the resistance that the operating force needs to be overcome is the friction of the valve stems and fillers and the thrust generated by the pressure of the medium.The diameter of the rod should be large, otherwise the dome of the valve sink will fail.In recent years, after the emergence of the self -sealed valve, the medium flow of the deeper valve has 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, the valve stem, whichThe diameter can be reduced accordingly.
Slotting deadline for empty valve model
Principles of Slotting Dead of Putting Valve
Normally closed state: The valve petals are hard sealing and pressed on the ballast of the valve seat, forming a hard seal, and the soft seal embedded on the valve petals is tightly pressed with the end surface of the valve seat, forming a second seal, a dual -quality seal structureThe zero leakage of the valve is guaranteed, and because the valve petals are opened, the valve is turned off and opened, and the valve petals are less force, which also makes the valve have a small torque when it is turned on and closed.Slow -pressure state: When the bottom of the valve petals leaves the cover of the valve seat, since the bottom surface of the valve petals is close to the cage shape, the bottom edge of the bottom is opened.And there is no direct pressure, so as to achieve a relaxation effect.

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