The process of shell experiments and seal experiments done by turbine fixed ball valves in some artificial environments is as follows.
1. The double blocking and discharge function of the turbine fixed ball valve: the tension spring preload floating seat is used to fix the turbine ball valve, when the valve is in two different states, fully open and fully closed, the fluid is blocked by the valve seat on the upstream and downstream side, and the discharge valve has the effect of secreting the cavity retention in the valve body.
2. Automatic pressure relief function of turbine fixed ball valve: when the abnormal pressure rise is caused by the increase in the temperature of the medium in the valve cavity, the automatic pressure relief can be achieved only by the function of the valve seat, and there is no need to go through the safety valve to relieve the pressure, so that the safety is greatly increased when transporting the liquid medium.
3. Fire safety structure: Valves planned and manufactured in accordance with the standard requirements of API607 and API6FA must have fire safety function settings.
4. Urgent grease injection rescue of the sealing of the turbine fixed ball: when the valve seat is blocked by fire or foreign matter in the medium causes the unexpected failure of the seal, the grease injection gun will be quickly connected with the grease injection valve, so that the sealing part of the valve seat will be injected with sealing grease in the shortest possible time, thus alleviating the leakage to a large extent.
5. Reliable stem seal box with low operating torque: In addition to the standard sealing ring setting, the "O" type sealing ring is also planned on the packing gland, so that the reliability of the valve stem seal is greatly enhanced. Under the injection effect of graphite packing and sealing grease, the degree of stem leakage will be minimized in the event of a fire, and the operation of the valve will be extremely simple and fast under the two-layer effect of the stem sliding bearing and thrust bearing.
6. Full bore or reduced diameter of turbine fixed ball valve: The flow orifice diameter of the full bore valve can be kept the same size as the inner diameter of the pipeline in the planning, so that the task of pipeline cleaning becomes very simple, and the use of full bore or reduced bore structure can also be selected according to the needs.
7. The valve stem can be lengthened: for the special needs of the city such as gas or underground pipelines, the valve stem can be lengthened to meet the needs of customers.
8. Turbine fixed ball valve is sensitive to operation: the seat and stem bearing with small friction coefficient and excellent self-lubrication are selected, which greatly reduces the operating torque of the valve. As a result, the valve can be operated sensitively and comfortably for a long time, even when no sealing grease is supplied.
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