1, not environmental protection, smell, pollute the air.
2, reduce the sealing. Poor quality sealants contain inferior plasticizers or substitutes, which tend to age and harden and shrink in the winter. Gap between glass and profiles causes water leakage and dust leakage. Many users often find out that the red liquid is flowing out from the bead inside the window of the rainy season, which is caused by the corrosion of the steel liner after the water enters between the window glass and the sealant. Not only greatly reduce the appearance of plastic windows, but also greatly affect the life of doors and windows.
Although the proportion of door and window seals is relatively small, the role can not be ignored. Insufficient door and window weatherstrips are not only environmentally friendly, but also contain odors that can harm your body and pollute the air.
As the prices of various petrochemical products continue to rise, some irresponsible manufacturers have started unfair competition from raw materials (the so-called cutting of materials, shoddy goods).
The key to the reality of doors and windows is sealing. Sealing seals play a decisive role. The seal material used in the market is generally modified by pvc. Its key role in soft pvc is nothing more than the addition of plasticizer. The current more stable plasticizer is phthalate phthalate. Fat, dibutyl ester. However, the current market price is very high. Some unscrupulous traders have used some other cheap things instead of (waste oil, the remaining oil base in the refinery, etc.), which has brought a lot of hidden dangers to consumers.
Its product symptoms:
1. The appearance of surface oil-exuding analysis appears, and those waste engine oils do not dissolve in both PVC and pvc. The surface of the sealing strip is prone to grease, and the surface of the profile is also stained with yellow marks. Even without environmental protection there are many volatile substances that pollute the air.
2. When those so-called plasticizers volatilize or ooze out, the sealing strip loses its original softness, becomes very hard, and quickly ages and shrinks, so that a large gap appears in the closed part of the door and window, and the sealing property changes. Very poor (leakage, dust leakage), especially in steel doors and windows inside the steel liner will be quickly corroded, there are many users often find that in the rainy season from the window inside the bead parts of the lot of red liquid is dirty, that is, leaking steel doors and windows over Corrosion early, the life of doors and windows will be greatly reduced.
In the production process, the investment in sealing strips is small, but its role can not be ignored. Therefore, everyone should not use those counterfeit products in order to reduce the cost. The method of identification is simple.
Advantages
and benefits
Easy installation and low maintenance cost of heat pipes and Vacuum Tubes,
High-quality stainless steel for the inner tank to continuously maintain a good water quality.
Stable operating without tube scaling or pipe explosion risk.
Fast system starting, high energy yield and low heat loss.
Strong capability of anti-freezing that is available for applications in low temperature area.
Pressurized system operating which is suitable for different installation methods.
The selective coating on the inner cover of the vacuum tubes converts solar energy and transfers heat to the heat pipes by aluminum fins. The liquid in the heat pipe changes into vapor which rises to the condenser. Then the heat passes through the heat exchanger, the water inside of water tank is being heated, and the vapor becomes liquid, returning to the bottom of the heat pipe. This transference of heat creates a continuous circulation as long as the heat pipe vacuum tube collector is heated by sun.
Heat is transferred by liquid to the water tank and heat the water efficiently. In addition, heat pipe vacuum tubes is highly freezing resistance, which ensures higher efficiency in cold areas.
Pressurized water tank ensures high comfort when customer uses hot water, the water flow and water pressure is much higher than compact non-pressurized solar water heater.
Pressurized Solar Water Heater
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