Comparison of plug valve and gate valve

1. The valve stem lift type wedge plug valve has no friction at all times, ensuring easy operation, zero leakage and long life.

When the valve is opened, the spool moves upwards out of the seat and then rotates 90° without friction until the valve opens. When the valve is closed, the spool rotates 90° without friction and then squeezes into the seat until it is completely closed. There is always no friction between the valve plug and the seat during the opening and closing of the valve.

2, double shut-off and automatic check valve sealing device (DBB function, with ABV automatic venting system).

3, the top and bottom have end caps, which can be quickly maintained and repaired online;

In the case of medium in the pipeline, the bottom end cap can be removed by simply closing the valve, which can quickly remove hard particles such as sand and welding slag, and facilitate the maintenance of the valve and the replacement of the seal.

Disadvantages of the gate valve:

1. There is always friction in the opening and closing process of the gate, so the operating torque is large, and scratches are easily generated on the sealing surfaces of the gate and the valve seat, causing the valve to leak;

2. There is no self-test leakage device. (Even if this function is achieved by installing a small valve through two gate valves, the automatic detection function cannot be realized);

3. For media containing particulate impurities, such as sand, deposited on the bottom of the valve, the gate cannot be completely closed, causing the valve to leak very seriously (this is a fatal disadvantage for gate valves).

The rolled aluminium plate can be divided into twe types : Aluminium Hot Rolled Plate and aluminium cold rolled plate . Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallizationtemperature, then the process is known as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is known as cold rolling.

Different of cold rolled plate and hot rolled plate:

1. The accuracy of cold rolled plate is higher, the thickness of cold rolled plate is not more than xxxxxx mm.

2. The thinner, the thinner and the thin rolling 0.001mm steel strip; Hot rolling is now the thinnest to reach 0.78 mm.

3. The surface quality is superior, cold rolled steel plates can even produce mirror surface; On the surface of hot rolled plate, there are iron oxide and other defects.

4. Cold rolling can adjust its mechanical properties according to user requirements, such as tensile strength and process performance such as stamping performance. Cold rolling and hot rolling are two different kinds of rolling steels. As the name implies, cold rolling is made in steel at room temperature. Hot rolled steel is rolled in high temperature.

Hot rolled palte

Cold rolled plate

Aluminium Rolled Plate

Aluminium Rolled Plate,Hot Rolled Thick Plate,Aluminium Hot Rolled Plate,Aluminium Thick Plate

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