The process of shell experiments and seal experiments done by turbine fixed ball valves in some artificial environments is as follows.
The double blocking and discharge function of the turbine fixed ball valve: the turbine ball valve is fixed by using the tension spring pre-tightening float valve seat, 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 plays the role of discharging the cavity of the valve body.
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 body cavity, the automatic pressure relief can be completed only by the function of the valve seat, and there is no need to relieve the pressure through the safety valve, so that the safety is greatly increased when transporting the liquid medium.
Fire safety structure: Valves planned and manufactured in accordance with the requirements of API607 and API6FA must have fire safety functions.
Sealing and urgent grease injection rescue of the turbine fixed ball: when the valve seat is blocked by fire or foreign matter in the medium causes the seal to fail unexpectedly, the grease injection gun will be quickly connected to 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.
Reliable stem seal box with low operating torque: In addition to the standard seal ring setting, the "O" ring is also planned on the packing gland, so that the reliability of the stem seal is greatly enhanced. Under the injection effect of graphite packing and sealing grease, once there is a fire, the degree of stem leakage will be minimized, and under the dual effect of stem sliding bearing and thrust bearing, the operation of the valve will become abnormally simple and fast.
Full bore or reduced bore of turbine fixed ball valve: The flow orifice 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 cleaning the pipeline is very simple, and the use of full bore or reduced bore structure can be selected according to the needs.
Valve stem can be lengthened: For special needs in cities 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 over a long period of time, even without the supply of sealing grease.
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