Brass Valve Installation Process


Brass valves are made of brass. Brass is an alloy composed of copper and zinc. If only brass made of copper and zinc is called ordinary brass. Brass is often used to make valves, water pipes, connecting pipes for internal and external air conditioners and radiators.

Brass is a copper alloy with zinc as the main added element. It has a beautiful yellow color and is collectively called brass. The copper-zinc binary alloy is called ordinary brass or simple brass. Brass with more than three yuan is called special brass or complex brass. Brass alloys containing less than 36% zinc are composed of solid solutions and have good cold workability. For example, brass containing 30% zinc is commonly used to make bullet casings, commonly known as bullet casing brass or seven-three brass. Brass alloys with a zinc content of 36 to 42% are composed of solid solutions, and the most commonly used is the June 4th brass with a zinc content of 40%. In order to improve the performance of ordinary brass, other elements are often added, such as aluminum, nickel, manganese, tin, silicon, lead, etc. Aluminum can improve the strength, hardness and corrosion resistance of brass, but it reduces the plasticity. It is suitable for the condenser of sea wheel and other corrosion-resistant parts. Tin can improve the strength of brass and the corrosion resistance of seawater, so it is called navy brass, which is used as ship thermal engineering equipment and propeller. Lead can improve the cutting performance of brass; this free-cutting brass is often used as a watch part. Brass castings are commonly used to make valves and pipe fittings.

How are brass valves installed?

1. The valve connected by the pipe thread is connected to the pipe thread at the pipe end, wherein the internal thread can be a cylindrical pipe thread or a conical pipe thread, and the external thread must be a conical pipe thread.

2. The gate valve with internal thread connection is connected to the pipe end, and the length of the external thread of the pipe end needs to be controlled. In order to prevent the pipe end from being excessively screwed in, the inner end surface of the thread of the gate valve of the top pressure gate valve is deformed, causing the deformation of the valve seat and affecting the tightness.

3. Valves with pipe thread connection should be wrenched at the hexagonal or octagonal part at the same end of the thread, and at the other end of the valve, to avoid deformation of the valve.

4. The flange connecting the flange of the valve and the flange of the pipe end is not only consistent with the specifications and dimensions, but also needs to be consistent with the nominal pressure.

5. When the valve stem and gate valve are found to have stem leakage during the installation and commissioning process, tighten the packing and press the nut, and pay attention not to use excessive force and limit it to no water leakage.

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