[China Aluminum Industry Network] Industrial aluminum extrusions pressed into the surface: along the longitudinal section of the profile strip exposed semi-porous, short a few millimeters, length is a few centimeters or longer. The main component of the pores is graphite.
Main reasons: 1. Due to graphite graphite lubricant ratio is too high or graphite is not completely stirred evenly, there are particles or bulk graphite;
2. The smear of graphite lubricant is too close to the shunt or hole of the aluminum extrusion die. When the aluminum alloy profile is extruded, these graphites do not enter the residual pressure, but are pressed into the superficial layer of the product by the high temperature and high pressure metal flow.
Solution 1, the use of high-quality lubricants;
2. When the lubricant is applied, it should be far away from the orifice or hole, and use as little or no lubricant as possible.
Valves are found in virtually every industrial process, including water and sewage processing, mining, power generation, processing of oil, gas and petroleum, food manufacturing, chemical and plastic manufacturing and many other fields.
People in developed nations use valves in their daily lives, including plumbing valves, such as taps for tap water, gas control valves on cookers, small valves fitted to washing machines and dishwashers, safety devices fitted to hot water systems, and poppet valves in car engines.
In nature there are valves, for example one-way valves in veins controlling the blood circulation, and heart valves controlling the flow of blood in the chambers of the heart and maintaining the correct pumping action.
Valves may be operated manually, either by a handle, lever, pedal or wheel. Valves may also be automatic, driven by changes in pressure, temperature, or flow. These changes may act upon a diaphragm or a piston which in turn activates the valve, examples of this type of valve found commonly are safety valves fitted to hot water systems or boilers.
More complex control systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an actuator. An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing control over a variety of requirements.
Stop Valves, Ball Cock, Angle Valves, Gate Valves, Check Valves
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