The following are the manufacturing technology of valves:
1) Casting: Casting is a method of forming materials. Put the molten metal into the mould of the desired shape, and wait for it to solidify. Then, take out the product after cooling.
2) Forging: it is one process of compressing a metal profile by placing it between a pair of anvil surfaces or in a metal mold after heating.
3) Welding: it refers to the process of heating or pressurizing a variety of materials, so that the atoms of materials are combined and the surface of materials is joined together.
4) Hardening overlay: in order to improve the wear resistance and high temperature resistance, the surface of base metal is adhered with high hardness metal layers. There are tungsten chromium cobalt alloy welding.
5) Surface hardening: it is a method of hardening the surface of metal. There are chemical methods such as nitriding, carbonitriding and physical methods such as high frequency quenching and hardening.
6) Testing: it refers to testing the characteristics of products or parts by some methods.
7) Inspection: it can determine the characteristics and dimensions of products or parts by some methods, and then compare them with the judgment benchmark to determine whether they are qualified or not.
8) Pressure inspection: a general term for checking by applying a set pressure.
9) Pressure shell test (pressure shell inspection): apply the specified pressure to test whether there is leakage outside the valve.
10) Pneumatic test (pneumatic inspection): apply the specified air pressure to test whether there is leakage from the valve surface, valve seat, packing and sealing gasket.
11) Seat leakage test (seat leakage inspection): apply the specified hydraulic pressure or air pressure to test whether there is leakage or check the leakage amount from the contact part of the valve seat surface, the middle port of the valve body and the installation position of the valve seat.
12) Visual inspection: check the inside and outside state of valves according to vision instead of machines. The condition of the casting surface and whether there is leakage in the shell pressure test are all visual inspection.
13) Visual inspection: visual inspection can be done without using the machine.
14) Non destructive inspection: it is to check whether there are defects in materials and parts without damaging them. There are radiographic testing, ultrasonic testing, magnetic particle testing, penetrant testing and other methods.
15) Ultrasonic cleaning (ultrasonic.cleaning): it refers to the ultrasonic wave in the liquid transmission longitudinal wave. It causes the liquid to expand and compress repeatedly, and it produces the vortex concave and interface stirring. This is a mechanical stirring.
16) Degrease cleaning treatment: using solvent and ultrasonic cleaning to remove the attached grease.
1) Casting: Casting is a method of forming materials. Put the molten metal into the mould of the desired shape, and wait for it to solidify. Then, take out the product after cooling.
2) Forging: it is one process of compressing a metal profile by placing it between a pair of anvil surfaces or in a metal mold after heating.
3) Welding: it refers to the process of heating or pressurizing a variety of materials, so that the atoms of materials are combined and the surface of materials is joined together.
4) Hardening overlay: in order to improve the wear resistance and high temperature resistance, the surface of base metal is adhered with high hardness metal layers. There are tungsten chromium cobalt alloy welding.
5) Surface hardening: it is a method of hardening the surface of metal. There are chemical methods such as nitriding, carbonitriding and physical methods such as high frequency quenching and hardening.
6) Testing: it refers to testing the characteristics of products or parts by some methods.
7) Inspection: it can determine the characteristics and dimensions of products or parts by some methods, and then compare them with the judgment benchmark to determine whether they are qualified or not.
8) Pressure inspection: a general term for checking by applying a set pressure.
9) Pressure shell test (pressure shell inspection): apply the specified pressure to test whether there is leakage outside the valve.
10) Pneumatic test (pneumatic inspection): apply the specified air pressure to test whether there is leakage from the valve surface, valve seat, packing and sealing gasket.
11) Seat leakage test (seat leakage inspection): apply the specified hydraulic pressure or air pressure to test whether there is leakage or check the leakage amount from the contact part of the valve seat surface, the middle port of the valve body and the installation position of the valve seat.
12) Visual inspection: check the inside and outside state of valves according to vision instead of machines. The condition of the casting surface and whether there is leakage in the shell pressure test are all visual inspection.
13) Visual inspection: visual inspection can be done without using the machine.
14) Non destructive inspection: it is to check whether there are defects in materials and parts without damaging them. There are radiographic testing, ultrasonic testing, magnetic particle testing, penetrant testing and other methods.
15) Ultrasonic cleaning (ultrasonic.cleaning): it refers to the ultrasonic wave in the liquid transmission longitudinal wave. It causes the liquid to expand and compress repeatedly, and it produces the vortex concave and interface stirring. This is a mechanical stirring.
16) Degrease cleaning treatment: using solvent and ultrasonic cleaning to remove the attached grease.
Next: The History of Valves
Previous: Notes for Quick Installation of Ball Valves
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