Selection of home improvement valve

A variety of valves, the choice is not easy, so teach you how to choose to solve the trouble!

1, when the purchase of visual inspection of the valve, the surface should be no trachoma; plating surface should be uniform luster, must pay attention to whether there is peeling, cracking, scorch, exposed at the end, peeling, dark spots and obvious pits and other defects; spray surface structure should be fine Smooth, uniform, no sag, exposed bottom and other defects. The above defects will directly affect the service life of the valve.

2. The pipe thread of the valve is connected with the pipe. When the purchase is made, the surface of the thread is inspected for visible defects such as dents and broken teeth. Special attention should be paid to the fact that the effective length of the screw thread and the connecting piece will affect the reliability of the seal. Sex, pay attention to the effective length of the pipe thread when purchasing. General dn15 cylindrical pipe thread effective length of about 10mm.

3. Gate valves and ball valves are generally marked with nominal pressure on their body or handle, and they can be selected according to their own needs when they are purchased.

4. When replacing an existing gate valve or ball valve, the length of the structure must be ascertained so that it cannot be installed after purchase.

5, the triangular valve pipe thread has two kinds of internal thread and external thread, according to the need to buy; also note that the current market, some of the zinc alloy manufacturing triangle valve, the valve price is lower than the average product, but Corroded and fractured.