The stop valve has five over-flow areas that need attention. According to the flow direction sequence, they are end channel area, waist drum throat area, valve seat opening area, flow area between valve disc and valve seat when the valve is opened, and flow area of rear waist drum...
The independent valve seat of the globe valve is usually connected by welding. Because the welding rod should go deep into the valve body during welding, the convenience of welding must be considered when designing the valve seat fitting surface. According to the past experience, two structures are recommended...
According to the current standard API 623-2013 “steel globe valves – Flanged and butt welded ends, bolted bonnet”, bs1873-1975 “steel globe valves and stop check valves with flanged and butt welded ends for petroleum, petrochemical and related industries”, and GB / T In the standard 12235-2007 “steel globe valves...
Stop valve is an indispensable fluid control product in modern industry, which plays a role of cutting off and throttling in the pipeline. Stop valve belongs to the category of general valve, which is widely used and widely used. Because its manufacturing process is not very complex, there are...
On the basis of the existing research, there are still many works to be further improved and upgraded. In particular, further research can be carried out from the following aspects: (1) Design different gating system of valve body, and determine the optimal gating system of valve body through simulation...
1.Simulation results and analysis of filling process The filling process of multi way valve casting is as shown in the figure. It can be seen from the figure that when the liquid metal just enters the cavity, i.e. before 5.5s, the filling is not stable, resulting in splashing and...
The hydraulic valve is an essential component in the hydraulic system. The performance of the hydraulic valve determines the performance of the whole hydraulic system. As the main part of the hydraulic valve, the valve body casting bears the high pressure load, and is also affected by the temperature...
1.Casting system model of double hydraulic valve body The design method of the valve body gating system is similar to that of a hydraulic valve body. The gating system uses two internal sprues to introduce the liquid metal into the casting cavity. Finally, it is calculated that the cross-sectional...
Taking the simplified one hydraulic valve body and the two multi way valve body for loader as the research object, the position and size of the defects in the casting process of the valve body were simulated and analyzed, and the strength of the hydraulic valve body with casting...
The drawing shows the shrinkage pore distribution of a series of hydraulic valves made of steel-304 stainless steel with casting temperature of 1700C. It can be seen from the drawing that the maximum porosity is 75.8%. By contrast, when the casting material is nodular cast iron QT500-7, the volume...