Brass

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For other uses, see Brass (disambiguation).
Brass is any alloy of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties.[1] In comparison, bronze is principally an alloy of copper and tin.[2] Despite this distinction, some types of brasses are called bronzes. Brass is a substitutional alloy. It is used for decoration for its bright gold-like appearance; for applications where low friction is required such as locks, gears, bearings, ammunition, and valves; for plumbing and electrical applications; and extensively in musical instruments such as horns and bells for its acoustic properties.

Decorative bolt made in solid brass designed by HerBron.

A decorative brass paperweight, left, along with zinc and copper samples.
Brass has a muted yellow color, somewhat similar to gold. It is relatively resistant to tarnishing, and is often used as decoration and for coins. In antiquity, polished brass was often used as a mirror.
Brass has likely been known to humans since prehistoric times, even before zinc itself was discovered. It was produced by melting copper together with calamine, a zinc ore. In the German village of Breinigerberg, an ancient Roman settlement was discovered where a calamine ore mine existed. During the melting process, the zinc is extracted from the calamine and mixes with the copper. Pure zinc, on the other hand, has too low a boiling point to have been produced by ancient metalworking techniques. The many references to 'brass' appearing throughout the King James Bible are thought to signify another bronze alloy, or copper, rather than the strict modern definition of 'brass'.[3]

valve

A valve is a device that regulates the flow of materials (gases, fluidized solids, slurries, or liquids) by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but usually are discussed separately.
Valves are used in a variety of applications including industrial, military, commercial, residential, and transportation.
Oil and gas, power generation, mining, water reticulation, sewerage and chemical manufacturing would constitute the majority of valves used by industry.
Plumbing valves are the most obvious in everyday life, taps for hot and cold water, gas control valves on cookers and barbecues, small valves fitted to washing machines and dishwashers, and safety devices fitted to hot water systems are all simple valves.
Most valves are operated manually, either by a hand wheel or lever. Some valves are 'self-operating' driven by changes in pressure, temperature or flow. These changes in pressure or temperature often act against springs or capsules filled with expanding substances. Examples of this type of valve found commonly are safety valves fitted to hot water systems or steam boilers.
More complex control systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an actuator. An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing fine control over a variety of requirements.
Valves are also found in the Otto cycle (internal combustion) engines driven by a camshaft, lifters and or push rods where they play a major role in engine cycle control.

[edit] Applications

Angle valve for Qatar customer

specification:3/8"*1/2" or 3/8"*3/8"

quality bidet mixer

elbow

We are mainly in producing and trading of valves, plastic items, brass elbow, male elbow and fittings (with the material of hardware). We produce more than 45,000,000 pieces of brass valves with different kinds each year, and our main products are brass elbow, male elbow, ball valve, check valve, globe valve, gate valve, bibcock, sanitary ware, flange valve, balance valve, pipe joint valve and boiler valve.


ZW807Elbow
Nominal Pressure: 1.6MPa
Suitable Medium: Water, Oil, Gas
Suitable Temperature: t ≤ 170ºC
Pipe Thread To ISO-228-1:2000


ZW808Female Elbow
Nominal Pressure: 1.6MPa
Suitable Medium: Water, Oil, Gas
Suitable Temperature: t ≤ 170ºC
Pipe Thread To ISO-228-1:2000

ZW809Male Elbow
Nominal Pressure: 1.6MPa
Suitable Medium: Water, Oil, Gas
Suitable Temperature: t ≤ 170ºC
Pipe Thread To ISO-228-1:2000

ZW810Wallplate Elbow
Nominal Pressure: 1.6MPa
Suitable Medium: Water, Oil, Gas
Suitable Temperature: t ≤ 170ºC
Pipe Thread To ISO-228-1:2000

test

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