Civil valve purchase
When purchasing the valve, visually inspect the valve, and the surface should be free of blisters; the electroplating surface should be evenly glossy, and attention should be paid to whether there are defects such as peeling, cracking, scorching, exposed bottom, peeling, black spots and obvious pitting; the sprayed surface organization should be fine and smooth. Evenly, there must be no sagging, exposed bottom and other defects.
Civil valves are currently commonly used in ordinary families in the form of gate valves, ball valves, triangle valves, etc., generally made of iron or copper.
Due to the good mechanical properties of copper alloys, the advantages of not easy to rust and strong corrosion resistance, copper valves have gradually replaced iron valves. The surface of the triangle valve is basically electroplated, and its function is not only to control the flow of the pipeline medium, but also to play a decorative role. The triangular valve is generally used for connecting pipes and water inlet hoses for water supply of faucets and toilets, and also for connecting pipes and water inlet hoses for water heater water supply.
Gate valves are basically used for the connection of pipes and water meters.
Ball valves are used for piping and water heater connections.
Since the opening and closing of the ball valve is more convenient than that of the gate valve, most of the connection between the pipeline and the water meter also adopts the ball valve.
Civil valve purchase:
Different types of civil valves should be selected according to the different requirements of users:
1. Visually inspect the valve when purchasing, and the surface should be free of blisters; the electroplating surface should be evenly glossy, and attention should be paid to whether there are defects such as peeling, cracking, scorching, exposed bottom, peeling, black spots and obvious pitting; the sprayed surface organization should be fine. , smooth and uniform, no sagging, 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 purchasing, visually inspect the surface of the thread for obvious defects such as dents and broken teeth. Special attention should be paid to the effective length of the pipe thread and the connecting piece, which will affect the reliability of the seal. When purchasing, pay attention to the effective length of the pipe thread. Generally, the effective length of DN15 cylindrical pipe thread is about 10mm.
3. Gate valves and ball valves are generally marked with the nominal pressure on their valve bodies or handles, and can be selected according to their own needs when purchasing.
4. When replacing the existing gate valve or ball valve, it is necessary to clarify its structural length, so as not to install it after purchase.
5. The pipe thread of the triangle valve has two kinds of internal thread and external thread, which should be purchased according to the needs; it should also be noted that there are some triangle valves made of zinc alloy on the market. The price of this valve is lower than that of ordinary products, but Easy to corrode and cause fracture.
You should try to buy from regular building materials stores and supermarkets, so that the quality of the products can be more guaranteed.