Aluminum alloy doors and windows were introduced in China in the early 1980s. Due to their unique advantages such as light weight and corrosion resistance, they gradually replaced the original steel windows and were favored by consumers. Aluminum alloy is an alloy made of various metal elements. It has the advantages that other materials can't match. It is light in weight and high in strength. It can be extruded into various new complex cross-section materials used in various periods. The new patented product color stainless steel bone security window overcomes the shortcomings of the existing anti-theft window in the market, such as poor anti-theft performance, easy rust, single color and strong sense of imprisonment. Not only the color is diverse and never rust, the internal steel plate is assembled through standard parts, which is more decorative while increasing the anti-theft performance, and the product grade is obviously improved. However, in the past two years, domestic steel-steel doors and windows have developed rapidly, which has already had a significant impact on the market of aluminum alloy doors and windows.

Some people think that the aluminum door and window frame has a strong thermal conductivity, which is not good for heat insulation, and plastic insulation can save energy. In response to this statement, the experts of the Aluminum Products Committee of the China Building Decoration Association believe that in fact, the heat insulation is mainly glass, not the problem of window frame materials.

1, sound insulation performance

According to the data, the sound insulation performance of plastic steel doors and windows is much better than that of aluminum alloy doors and windows. For example, in buildings that meet the same noise requirements, the distance between the building where the aluminum alloy doors and windows are installed and the main road must be 50 meters away, and if it is made of plastic steel doors and windows, it can be shortened to within 16 meters.

2, thermal insulation performance

When it comes to thermal insulation, we need to compare the technical parameters of the material, for example, the thermal conductivity of PVC material is 0.14, while that of aluminum alloy is 175. That is to say, under the same conditions, in terms of material thermal conductivity, aluminum is 1250 times that of PVC material. Of course, if PVC is made into doors and windows and energy consumption is compared, it is difficult to generalize. Because the interior loses heat, it is usually associated with roofing, floors, walls, and doors and windows. However, scientific research shows that, as an ordinary house, the air conditioner is also turned on, and the room where the steel doors and windows are installed is more than 5 degrees per day than the room with the aluminum alloy doors and windows.

3, corrosion resistance

Plastic steel doors and windows can resist the corrosion of acid and alkali and other chemical substances, so they are not afraid of urban environmental pollution, hydrochloric acid and acid rain. Aluminum alloy is not the case, it will easily lead to surface oxidation and shorten the service life after corrosion.

4, door and window installation performance and service life

Plastic steel doors and windows are much smaller than aluminum alloy doors and windows, and because of the overall shape, the installation speed is very fast, which greatly improves the overall work efficiency. In terms of service life, the normal service life of plastic steel doors and windows is 30 to 50 years, lower than aluminum alloy doors and windows.

5, product style and process performance

Plastic steel doors and windows and aluminum alloy doors and windows can be made into flat, push-pull, overhang and curved windows according to the design requirements of the designers. The shape is beautiful and novel. The surface of plastic steel doors and windows can be colored, coated, and multi-color co-extruded; the surface of aluminum alloy doors and windows can be sprayed, electrophoresed, and the color can be diversified.  

Valves

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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