What is the direction of the water valve switch? How to choose the water valve?

There are many valves on the market, common are similar to the following and tap water and faucet with the use of water valves, then the design of this specific style of water valves should start from where to learn it? What is the direction of the corresponding switching method? Through the following can be learned, the common water valve is generally clockwise off, counterclockwise on, in addition, there may be some special design, but this design is more in line with the human nature of the habit of use, but also has a certain principle.

One, the water valve switching direction

Water valves are generally divided into two kinds, one is a ball valve; one is a gate valve. Ball valve wrench perpendicular to the water pipe is closed, screwed or counter-screwed 90 degrees wrench and water pipe is open in the direction; gate valve handwheel clockwise screw is closed, counterclockwise screw is open. Gate valve in the application should not be screwed too tight, so as to avoid threaded pre-buttoned spool fall off. Ball valves are durable and labor-saving when applied.

Two, how to choose the water valve

1. Purchase visual inspection of the valve, the surface should be free of sand; plating surface should be glossy and uniform, attention must be paid to the presence of peeling, cracking, burning, bottoming out, flaking, black spots and obvious defects such as pitting; spraying surface organization should be fine, smooth and uniform, there shall be no hanging, bottoming out and other defects. The above defects will directly affect the service life of the valve.

2. Valve pipe threads are connected to the pipeline, in the purchase of visual inspection of the thread surface with or without dents, broken teeth and other obvious defects, special attention should be paid to the effective length of the pipe threads and the connector will affect the reliability of the seal, the purchase of the effective length of the pipe threads should be noted. General DN15 cylindrical pipe thread effective length of about 10mm.

3. Gate valves, ball valves are generally labeled with nominal pressure on the valve body or handle, when purchasing according to their needs.

4. Replacement of the existing gate valve or ball valve, to find out the length of its structure, so as not to purchase can not be installed.

5. Triangle valve pipe threads have internal and external threads of two kinds, according to the need to buy; but also note that some of the current market zinc alloy manufactured triangular valve, the valve is sold at a lower price than the general products, but easy to corrode and cause breakage.

Three, water pipe valve switch how to disassemble

To see whether the PVC pipe or metal galvanized pipe. If in the middle of the location had to have no live only sawed off, the installation plus live water pipe is the water supply pipe, modern decoration water pipe are used to bury the wall construction, the classification of the water pipe there are three kinds, the first category is metal pipe, such as plastic-lined hot-plated cast iron pipe, copper pipe, stainless steel pipe, etc. The second category is plastic-compound metal pipe. The second category is plastic compound metal pipe, such as plastic compound steel pipe, aluminum-plastic composite pipe. The third category is plastic pipe, such as PB, PP-R.

The above recommended for you on the popularity of the water valve switching direction, thus telling us. Although the design and size of the water valve style options are more abundant, but generally speaking, the direction of the switch is the same, that is, clockwise off, counterclockwise Kai, such a design has a certain principle, in line with our actual use of the habit, but also to achieve the purpose of convenient and fast, interested consumers and friends can also be said to understand from the above, the specific circumstances of the specific analysis, I believe that we can The first time I've seen this, I've seen a lot of people who have been in the same situation.

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