TAIZHOU XINGNUO TECHNOLOGY CO.,LTD. Is a factory established in 2007,specialized in producing and developing brass valves ,fittings and heating system products.The company is located in Yuhuan,-The town of valves in China.

Our present business –policy follows requirements coming from our customers in different world markets.

We have the forging plant ,about more than 300 CNC and other metal tooling machinery .

The Quality  Control ,operating during all production proceedings and the high level of our skill work force ,allow us to obtain high quality  products.

We will keep trying to supply our new and old customers low price and high quality products.

  • IMG_5264
  • IMG_5993
  • MF1614
  • BV1026-MF
  • BV1028-MF
  • BV1030-FF
  • BV1033-FF
  • BV1038 2
  • BV1047-N
  • BV1063-MF
  • BV1067-MM
  • SV5020
  • AV1006-MM
  • AV1008-MM
  • IMG_5164
  • IMG_5165
  • CV5004
  • CV5006
  • FT1002

The main technical properties of copper valves

Strength properties

Strength properties of copper valve is the brass valves withstand the media pressure capability. Copper valve is a pressure of mechanical products, and therefore must have sufficient strength and rigidity to ensure the long-term use without breakage or deformation.

Sealing performance

Copper sealing performance of the valve is brass valves part of the sealing ability to prevent media leaks, it is the most important copper valves technical performance indicators. Copper valve seal has three parts: opening and closing pieces and valve seat sealing surface contacts between the two; the filler stem and the stuffing of the distribution and office; the connection of body and bonnet. Which is called before a leak within the leak, which is commonly known as Guan lax, it will affect the ability of copper valve cut off media. For the truncated valve, the internal leakage is not allowed. Leakage after the two called the leak, that media leaks from the valve to the valve outside. Leakage will result in material losses, environmental pollution can also cause serious accidents. The explosive, toxic or radioactive medium, leakage is allowed, and therefore copper valve must have a reliable sealing performance.

Flowing medium

Will produce medium flows through the valve the pressure loss of copper (Cu valve pressure both before and after the poor), that is, copper valve on the flow media have a certain resistance, medium to overcome the resistance of copper valve, it takes some energy. From the conservation of energy considerations, the design and manufacture of copper valves, to minimize copper valve on the flow resistance of the medium.

Hoisting force and hoisting moment

Hoisting force and hoisting moment is brass valves to open or close the force or torque must be imposed. Closed copper valves, need to open two pieces with the fat seat sealing surface seal formed between certain specific pressure, but also to overcome between the stem and the packing between the stem and the nut thread between the stem end bearing at and other friction parts of the friction, and therefore must apply the closing force and closing moments, copper valve opening and closing process, the required closing force and closing moments of change, and its maximum is close to the final instant or open the initial transient. Design and manufacture of copper valve should be sought to reduce the closing force and closing moments.

Hoisting Speed

Hoisting speed is used to complete a copper valve opening or closing time of action needed to represent. Generally copper valve opening and closing speed without strict requirements, but some conditions have special requirements for opening and closing speed, the prompt to open or close, to prevent accidents, and some require slow and shut down to prevent water hammer, etc. , which should be considered in the choice of copper valve type. Action sensitivity and reliability of This refers to the copper valve for the medium parameters change, and make the appropriate degree of sensitivity. For the throttle valve, reducing valve, regulating valve used to adjust the medium parameters brass valves and safety valves, steam traps and other brass valve with a specific function, its functional sensitivity and reliability are very important technical performance indicators.


It indicates the durability of copper valves, copper valve is an important performance indicators, and has great economic significance. Usually guarantee the number of seals required to open and close that can also be used to indicate the use of time.


Copper valve common faults and maintenance

Copper valve opening and closing jamming, inflexible or does not open and close properly, and even unable to continue opening and closing, mainly due to the stem and other parts of the jamming, jamming mainly between the stem and packing. In general are:

After the copper valve stem packing gland skew touch

- Processing: Install

Copper filler valve installed incorrectly or too tight

- Treatment: packing pretension, relax appropriate filler.

Copper valve stem and packing gland bite

- Processing: Replace or repair.

Bite or bites between the copper valve parts

- Treatment: properly lubricated stem.

Copper valve sealing surface scratches, abrasions and bite stem beam part stem threaded portion bites.

After the copper valve sealing surface polishing with abrasive grains embedded in the sealing surface, not cleaned, resulting in the sealing surface scratches; after some by the use of abrasive particles in the scouring medium abrasive and sticky discharge the sealing surface, the copper valve switch, causing abrasions.

- Treatment: rational use of abrasive, the sealing surface must be cleaned after grinding.

Copper valve medium loot or slag not cleaned, resulting in abrasions.

- Processing: Re-clean.

Copper valve stem and packing gland, packing pads grazing, followed by the medium in the medium containing boron, crystallized form after escaping the hard particles in the filler stem contact surface strain when switching the stem surface.

- Processing: Install, adjust with the gap parts and improve the stem surface hardness.

Copper valves have contamination at the trapezoidal thread swag, poor lubrication conditions; stem and related parts deformation

- Processing: Clear stolen goods, high-temperature lubricant coated copper valves timely; deformation parts amendment.


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