The process of shell experiments and seal experiments done by turbine fixed ball valves in some artificial environments is as follows.
Double blocking and discharge function of turbine fixed ball valve: the turbine ball valve is fixed by using tension spring preload floating valve seat, when the valve is in two different states of full 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.
Active pressure relief function of turbine fixed ball valve: when the abnormal pressure boost is caused by the increase in the temperature of the residence medium in the valve body cavity, the active 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 at all, 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 of the turbine fixed ball is urgent grease injection: 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 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 adhere to the same scale as the inner diameter of the pipeline in the planning, so that the mission of pipeline cleaning becomes very simple, and the use of full bore or reduced bore structure can also be selected according to the needs.
Stem lengthened: For special urban requirements such as gas or underground pipelines, the valve stem can be lengthened to meet the customer's needs. 8. Turbine fixed ball valve is sensitive to operation: the valve seat and stem bearing with small friction coefficient and good self-lubrication are adopted, which greatly reduces the operating torque of the valve. As a result, the valve can be operated sensitively for long periods of time, even without the supply of sealing grease.
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