At present, the door lock cylinders in the market are divided into A grade, B grade, super B grade and the like. “Consumers can identify the quality of the lock cylinder by the number of marbles. Generally speaking, multi-row marble locks are better than single-row marble locks, and multi-row stealth marble locks are superior to ordinary multi-row marble locks.†Experts tell Editors, the cost of the B-class lock core is much higher than the A-class lock core. Therefore, most of the products in the market are launched with A-class locks. "If the security door key has only one row of marbles, it is basically a Class A lock cylinder. If you feel that it is not safe enough, you can replace it with a B-class or Super-B lock cylinder to improve the overall anti-theft performance of the security door."
Material work is also very important
"In addition to the lock core, the quality of the hardware is also very important." Experts told the editor that the material of the lock is generally aluminum alloy, stainless steel and copper, of which the strength and durability of the aluminum alloy is the worst, the best copper, but The price is also higher. “The same is a copper lock. The workmanship and quality of each brand are also very different. It is difficult for ordinary consumers to distinguish.†The salesperson said that the only way for consumers to buy “safe locks†is to compare them. The locks of the big brands are very fine, and the seams of the low-end locks will look rough. In addition, when the lock is turned on, the sound is mostly crisp. The low-end lock will appear loose when the key is inserted, and the sound is mostly dull when it is turned on.
Door locks must be "changed" every five years
“The average lock has a long service life, and the lock cylinder will naturally wear out. It is easy to be opened by a key with a similar tooth shape.†A nearby master who unlocked the key said that the ordinary door lock must be replaced after five or six years of use. One lock cylinder.
The editor reminds the owners that the security doors and door locks of many communities are purchased and installed by real estate developers, and most of them are not particularly good quality locks. “In the same community, the same type of door lock is used in large quantities. In theory, the probability of “locking a few doors†will increase. Many new residents in the community report that they often go wrong. Open the door and find that it is not your own home." The editor reminded netizens that if the lock cylinder is not replaced for a long time, it will cause more serious safety hazards.
The general lock has a long service life, and the lock cylinder will naturally wear out, and it is easy to be opened by a tooth with a similar tooth shape. If the lock cylinder is not replaced for a long time, it will cause more serious safety hazards. It is very likely that a lock will open several doors. Therefore, the hardware door lock must ensure the quality of the accessories and avoid unnecessary trouble.
Concerned about surprises
Label: I don't know the hardware common sense: the door lock also has a shelf life
Previous: How much do you know about the small object university door bathroom hardware knowledge? Next: Machine tool repair analysis
Venturi Injector is also called water jet. It is composed of nozzle, suction chamber and diffuser. It is a kind of multi-purpose aeration method developed by using the principle of negative pressure of jet. The unique design of mixing chamber, the strong mixing of water and air, makes the mixing uniform and complete, and produces many and delicate bubbles. The oxygen conversion rate of traditional aeration equipment is generally less than 10%, and the oxygen conversion rate of jet aeration equipment can reach more than 25%.
Venturi Injector
PVC Venturi Injector, PVDF Venturi Injector, Plastic Venturi Injector
Ningbo RMI Plastic Co., Ltd. , https://www.rmiplast.com