Pump valve casting hardness testing and fluid control of the valve
The valve is mainly used in the control system of the pipeline fluid conveying system. The valve is mainly used to change the direction of the passage and the flow direction of the medium. The valve casting has the function of regulating, throttling, stopping, diversion and closing Features.
Pumps are mainly used for fluid control valves, from the simplest cut-off valve to a very complex automatic control system used in a variety of valves, its variety and specifications. The product can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, corrosive media, liquid metal and radioactive fluid. The working pressure of the valve can be from 0.1MPa to 420MPa, -196 ℃ ultra-low temperature to 650 ℃ high temperature.
Even the welding area of Valve casting parts confirmed to be qualified after passing non-destructive testing, but if machining is needed, it should be checked about the hardness of the welding area, which is to eliminate the effect of stress treatment inspection. If the tempering temperature is not high enough, or tempering time is shorter, will cause higher stenthen of the welding area.
The valve weld area needs to be identified and tested with hardness values. Grinding the welding area with a hand-held grinder gently, using a portable Brinell hardness tester to hammer three points, compare the hardness of the weld area and the hardness of the steel itself. If the hardness values of the two regions are similar, then the oxygen-acetylene tempering is basically successful.
In order to obtain the goal of energy-saving, valve manufacturers need to do these two aspects of the work, first, the implementation of energy-saving access to new enterprises, especially in the small cast enterprises; Second, the existing enterprises Take effective energy-saving measures to eliminate backward production capacity. Among them, the existing energy-saving work of the existing valve casting enterprises is the most important. In the competitive market environment, the valve casting enterprises are constantly changing the development ideas of the enterprises and conforming to the development of the market and changing the marketing mode.
Wuxi Lingtong Casting Co.,Ltd.
Attn: Ms. Vivian Wang
Tel: +86 510 85990876
Cell: +86 13861777146 15852600207