Exterior The outer surface of the faucet is generally p […]
The outer surface of the faucet is generally plated. The plating of the faucet is too thick and easy to peel off, and vice versa. Generally, the neutral and acid salt spray test is carried out. When the user purchases the faucet, in the case of sufficient light, the product can be placed in the hand for observation at a straight distance. The surface of the faucet should be black as a mirror, without any oxidized spots. , burnt marks; and close look no pores, no blistering, no leakage plating, uniform color; touch no burrs, sand particles by hand; press the surface of the faucet with your fingers, the fingerprints quickly spread, and it is not easy to adhere to scale. Some faucet surfaces are coated with titanium, bronze (imitation gold), gold-like electrophoretic paint.
The main components of the faucet are usually cast from brass, sanded, turned, pickled and impregnated, pressure tested, polished and plated. Alloy copper grades are commonly used in 58 copper, 59 copper, 60, 62 copper. Of course, the higher the better, the less impurities and harmful substances in the body, but this is generally difficult to see from the surface. The difference is that there is a simple way to look at the weight of the faucet. Generally, the heavier the weight, the better the material. In addition, the quality of the plating can be seen. The better the plating quality, the better the material used. If it is a copper with more impurities. The quality of the plating layer will be poor, and the sound can be heard. The sound of a good material will be dull. If it is the faucet of zinc alloy, the zinc alloy plating quality is poor, the corrosion resistance is not good, and the price made by ABS plastic is the cheapest, and the plating quality is poor. Brass is heavier and harder, zinc is lighter and softer, and plastic is the lightest and softest. However, the parts that are in direct contact with drinking water, the national standard regulations do not allow the use of zinc alloy materials.
Spool and accessories
The quality of the spool is the key to the faucet. At present, ceramic valve cores and spiral valve cores are commonly used in faucets. The ceramic valve core opens and closes quickly, and the temperature adjustment is simple. The single-handle ceramic valve core is made of plastic, ceramic sheet, rubber, etc. Customers should turn the handle left, right, up and down when purchasing, which is light and has no blockage. The ceramic valve core of the double-handle faucet is composed of brass, ceramics, rubber, etc., and the turning hand wheel should be easy and without blockage. The faucet of the ceramic valve core is preferably provided with a filtering function to prevent the ceramic piece from being cracked. The traditional spiral valve core is rubber-sealed and has a large amount of water. It feels light and does not get stuck during the process of loosening the valve stem. When tightening the screw with a certain force, check whether the screw and the valve cover, the screw and the handwheel are slippery. .
The combination of the components of the faucet is perfect, and the precision of the assembly of the spare parts is high. In the machining process, most factories in China use the instrument lathe and the two-axis machine tool to process the workpiece, which often causes the product to have a larger shape. Bit tolerance. In developed countries, professional multi-station machine tools are used to machine the workpiece. The workpiece can be completely processed at one time, and the product shape tolerance is very small.
Warranty card and product identification mark
The manufacturer's brand logo, quality guarantee, etc. should be included in the faucet packaging box. Because the components in the faucet are not visible, the plastic, ceramic, and rubber materials used in the ceramic spool affect the service life of the spool. The performance test of strength, sealing, flow, noise and life of each faucet at the factory must be found during the production process. Generally, regular enterprises have quality assurance and after-sales service cards in the packaging of faucets. If the user has problems during the use of the product, the manufacturer can quickly solve the problem for you.
Use process check
After the installation is completed, check whether the joints of the faucets and the ceramic valve core are leaking; whether the valve body seeps water (commonly known as sweating) and the flow and noise. In the process of using hot and cold water in the future, check whether the ceramic valve core leaks water to check whether the plastic, ceramic sheet and rubber material meet the requirements.