Common troubleshooting solutions for valves in metal blasters

In the pharmaceutical chemical industry, the valve failure of the metal quick freezing box is relatively common, and then the professional manufacturer of the Wuxi crown metal quick freezing box and everyone think about the specific solution.

Valve body leakage

When the valve body has blisters or cracks or the valve body is repaired, the valve body leakage may occur. Treatment technique: polishing the suspected crack, and eroding with 4% nitric acid solution, if there is crack, it can be displayed; Excavation treatment is applied to the crack.

Stem bending

When the valve stem and the mating thread that it is mated are damaged or the stem tip is broken and the stem is bent. The reason may be due to improper operation, excessive force of the switch, failure of the limit device, failure of the over-torque protection; too loose or too tight thread; excessive number of operations and long service life. By improving the operation, the unavailability is too large ; check the limit device and check the over-torque protection device; select the appropriate material, the assembly tolerance meets the requirements; replace the spare parts.

Bonnet joint surface leakage

The reason for the bonnet joint surface leakage may be that the bolt tightening force is not enough or tightly biased; the gasket does not meet the requirements or the gasket is damaged; the metal quick freezing box joint surface is defective. Metal blasters are recommended to tighten the bolts or make the door flange flanges consistent; replace the gasket; disassemble the sealing surface of the door cover.

Valve leakage

The phenomenon of internal leakage of the valve may occur: the closure is not strict; the joint surface is damaged; the gap between the valve core and the valve stem is too large, causing the valve core to sag or contact poorly; the sealing material is poor or the valve core is stuck. It is recommended to improve the operation, re-open or close; the valve disintegrates, the valve core and the valve seat sealing surface are re-ground; adjust the valve core to the valve stem clearance or replace the valve flap; the valve disintegrates to eliminate the jam; re-replace or weld the sealing ring.

The spool is disengaged from the valve stem

When the spool is disengaged from the valve stem, it is easy to cause the switch to malfunction. The reason for the metal quick freezing box includes improper repair; the joint between the valve core and the valve stem is corroded; the excessive force of the switch causes damage to the joint between the valve core and the valve stem; the spool retaining gasket is loose and the joint is worn. Pay attention to inspection during maintenance; replace the door rod with corrosion-resistant material; the operation is not strong switch, or the valve can not be opened after full opening; check and replace the damaged spare parts.

Spool and valve seat have cracks

The valve core and the valve seat have cracks. The reason may be that the joint surface welding quality is poor; the temperature difference between the two sides of the valve is large. It is recommended to repair the cracked part, heat-treat according to the regulations, and light and grind.

Metal blasters These valve components are relatively simple, so you can learn more about these valves about metal blasters.

Chrome Plating Production Line

Metal electroplating line is widely used in aircraft and auto parts, machinery parts, metal, hardware processing industries, including cooper plating, silver plating, zinc plating, nickel plating, gold plating, chrom plating, anodizing, electrophoresis production line,etc.

Chrome plating refers to the act of plating chromium as a plating layer on other metals.
Chromium is a kind of silver-white metal with a bluish tint. Metal chromium is easily passivated in the air, and a very thin passivation film is formed on the surface, thus showing the properties of precious metals.
The chromium-plated layer has a very high hardness, and its hardness can vary within a wide range of 400-1200HV according to the composition of the plating solution and process conditions. The chromium-plated layer has good heat resistance. When heated below 500℃, there is no obvious change in gloss and hardness. The temperature above 500℃ starts to oxidize and discolor, and the hardness starts to decrease when the temperature exceeds 700℃. The friction coefficient of the chrome layer is small, especially the dry friction coefficient, which is the lowest among all metals. Therefore, the chrome-plated layer has good wear resistance.

Chrome Plating Production Line,Chrome Plating Line,Chrome Electroplating Line,Hard Chrome Plating Line

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