The valve core is recommended to be made of ceramics, which is wear-resistant, smooth and will not drip. When the ceramic valve core is turned on and off, it is very lubricated and has no blocking feeling. The overall interface has no gap and is not easy to be damaged. Its service life is also the longest of all materials. High quality valves usually use imported brand valve cores, such as Spain Sedal and Hungary Kerox, which can achieve 500000 times of opening and closing life.
A good valve core can be opened and closed for 500000 times or more without water leakage. This number can be opened and closed 100 times a day for 13.7 years. Common imports are the Spanish track, Hungary kellos, etc. The hardness of good valve core porcelain is very high, and some will be designed with lubricating groove. Therefore, the use of lubricating oil is very small, environmental health is more durable. The relatively poor valve core uses a lot of lubricating oil to camouflage its smooth feel due to its insufficient accuracy. After long-time use, the reduction of lubricating oil can easily make the feel astringent, or the inferior plastic shell will break. Generally speaking, the high-quality domestic valve core can fully meet the needs of families.
At present, there are shower products with constant temperature valve core. Its function is to continuously control the water temperature at the set temperature through the valve core, and the temperature is constant without frequent adjustment.
The first generation thermostatic valve core adopts wax element.
The second generation thermostatic valve core adopts shape memory alloys (SMA) spring.
Japan’s toto, KVK, Yinai… Thermostats are all made of SMA shape memory alloy, while German brands (including Hans Geya) and domestic high-end thermostats are all made of wax sensitive valve cores. The difference of body feeling is only the speed of water temperature reaction, and there is little difference in actual use. Most domestic high-end thermostatic products use French Vernet valve core
In addition, it should be noted that the faucet with constant temperature valve core is not suitable for solar water heater, and the temperature of 100 ℃ in summer will cause damage to the wax sensitive valve core; Try to choose the gas water heater with more than 12 liters and water servo function, otherwise it will affect the use experience due to the imbalance of water pressure. At present, the gas water heater usually has the function of constant temperature, plus a constant temperature tap, which is a bit redundant, and has no cost performance.
If the shower drips or leaks, you need to remove and replace a new valve core, you can do it yourself. The replacement steps are as follows:
Please remember to turn off the waterways and water heater before disassembly to ensure safe operation.
1. Turn down the decorative cap of the handle, and the fixing screw of the handle is here. Loosen the screw and remove the handle. You can remove the handle by about one or two turns.
2. Twist down the decorative cover, the used shower may be full of scale, which is difficult to remove. Don’t twist it too tightly during installation to facilitate later disassembly
3. Remove the gland nut (nuts are also various, tools can be used flexibly) and take out the valve core.
4. Slightly open the water valve, flush the valve body with water, remove impurities, and then replace the new valve core (the positioning should be accurate, and the installation surface should be clean and free of impurities).
5. Re install the gland nut with moderate tightness (if it is loose and leaking, it is inconvenient to remove next time if it is tight), turn the valve core adjusting rod clockwise until it can not be turned, and then install the handle, screw and decorative
Post time: Jul-13-2021