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  • Posted: 03/09/2020 01:03:30   Hits: 15
    According to the working pressure of the gas pipeline, reasonably select the valve body material, which can not only meet the safe operation of the pipeline, but also achieve the purpose of reducing t...
  • Posted: 10/12/2019 11:10:56   Hits: 45
    01. Pressure test method for check valve Test state of the check valve: the axis of the lift check valve is at a position perpendicular to the horizontal; the axis of the swing check valve and the ax...
  • Posted: 08/01/2019 04:08:42   Hits: 54
    Characteristics of the shipping industry The shipyard is very simple. Therefore, there is very little space on board. The operator must reduce the volume to keep the gas tank as small as possible. The...
  • Posted: 07/01/2019 08:07:47   Hits: 41
    6. Metal surface treatment Metal surface treatment processes include plating, surface penetration, surface oxidation passivation, and the like. Its purpose is to improve the corrosion resistance of m...
  • Posted: 07/01/2019 08:07:37   Hits: 54
    Electrochemical corrosion corrodes metals in various forms. It acts between the two metals. Moreover, due to the different solubility of the solution, the different solubility of oxygen, and the sligh...
  • Posted: 04/18/2019 05:04:01   Hits: 36
    Fully welded ball valve performance 1. No need for maintenance, adjustment and lubrication, easy to install, long-term reliable operation under low operating costs. The surface is spray-treated, and ...
  • Posted: 02/18/2019 05:02:10   Hits: 40
    An all-welded ball valve is used in a wide variety of applications. It has superior quality and high performance stability that general cast steel ball valves cannot achieve. Its service life is far l...
  • Posted: 11/09/2018 01:11:04   Hits: 73
    With Chinese long-term high-speed economic growth demand for energy, the people's requirements for the quality of life and the ecological environment are also increasing. Century projects such as ...
  • Posted: 09/19/2018 04:09:20   Hits: 48
    At present, butterfly valves, as parts that control flow and pipe system, have been widely used in petroleum, chemical engineering, metallurgy, hydroelectricity, and other fields. Hermetic seal is the...
  • Posted: 07/17/2018 05:07:19   Hits: 32
    Valve selection and setting parts ◆◆◆ Valves used for water supply pipes are generally selected according to the following principles. When the diameter of the pipe is smaller than 50mm, the...
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News & Events
2020.05.26
Working Principle of Butterfly Valve
Butterfly valve is a kind of valve that is opened and closed according to the rotation of the valve stem to drive the disc to rotate. In the cylindrical passage of the valve body, the disc is rot...
2020.05.23
Reasons and Solutions for Valve Hard to Fully Close
In the process of using the valve, there are often some perplexing problems. For instance, the valve can't be tightly closed. So how should do? If the valve is not tightly closed, first find out ...
2020.05.14
Notes on Selection of Valves
Selection of valves shall comply with the following principals: 1. According to the use place and purpose of the valve, and after knowing the relevant regulations, specifications, standards and gaini...
2020.05.07
What is Butterfly Check Valve?
The check valve belongs to an automatic valve, and its main function is to prevent back flow of medium, reverse rotation of pump and drive motor, and relieving of container medium. Check ...
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