Industrial Valves is liquid pipeline transport system in the software control system, it is used to change the channel cross-section and liquidity position, medium drainage, ended, throttle valve, check valve, separation or overflow relief, and so on. Sealing surface damage because of some artificial damage and damage to two, of course.

human factors damage: because the design is not considerate, bad not jing, material manufacturing, installation, skew, application is not very good and maintenance does not reach the designated position caused by factors such as.

of course damage: damage valves are all normal working conditions, is the medium of sealing surface is difficult to avoid damage caused by erosion and abrasion, etc.

in general: the reason of cause the damage of valve sealing surface key in any of the following categories:

installation skewed and maintenance is not in place, sealing surface work conditions caused by Industrial Valves with faults, even damage the sealing surface.

bad model selection and control of the damage caused by the poor. Embodied in not used according to the condition of working condition valve, apply disconnecting valve when the overflow valve, causing closed than too much pressure and closed too quickly or closed doesn't close tightly, make the sealing surface abrasion and damage.

sealing surface processing quality is not very good, the specific performance on the sealing surface such as crack, air flow and clamp design faults, is due to improper spray welding and heat treatment process standard and spray welding and heat treatment process control during the whole process, caused by poor sealing surface hardness is too high or too low, is due to the material caused by the contradiction is not correct or incorrect heat treatment, the sealing surface uneven strength, erosion resistance, the key is due to the underlying metal materials in the spray welding process to blow to come above, played down the sealing surface of aluminum alloy components. Naturally, there also exists a topic of design scheme.

mechanical equipment damage, the sealing surface in the opening and closing process will cause the abrasion, dept. of injury, such as task of damage. Between the sealing surface, under the effect of high pressure molecules penetrate extravasation, cause adhesion conditions. When the two seal face each other move, synechia place literally tear. Sealing face higher surface coarse value, this kind of situation, the more casually. The valve in the closed, piston valve in the back seat during the whole process will upon during the whole process and task of seal face, make the sealing surface damage or cause embossing.

medium abrasion, it is medium theme activities on sealing surface damage, clean, the result of cavitation. Mayflies medium under a certain rate, the medium fine sand exclusion violate sealing surface, make it lead to the damage, high speed theme medium sealing surface cleaning, immediately make it lead to the damage, Francis and partial gasification medium the produce irritation bubble blasting impact sealing surface, lead to the damage. Medium abrasion and replacement effect, organic chemical erosion corrosion of seal face.

photoelectric catalysis erosion, sealing surface touch each other, the sealing surface and the enclosed body oil plate and the touch and medium density difference and poor oxygen concentration, are all potential difference, produce photoelectric catalysis erosion, led to the erosion oxidation side of the seal face.

medium organic chemical erosion, sealing surface surrounding the medium is not under the condition of power flow, medium immediately with the sealing surface oxidation, erosion seal face.

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