Technical Articles

  • Corrosion Protection on Valve Body
    Posted: 09/23/2016 16:07:21 Hits: 7

    Corrosion on valve body is considered that the metal materials are destructed under the environment of chemical or electrochemical environment. The corrosion is caused by spontaneous interaction between metal and surroundings. So, isolating metal from surroundings or using more nonmetal synthetic ...

  • Check Valve at the Outlet of Centrifugal Pump
    Posted: 09/23/2016 16:07:21 Hits: 9

    Check valve at the outlet of centrifugal pump is used to prevent water hammer caused fluid backflow in outlet pipeline from damaging impeller inside pump. Check valve is mainly used to prevent fluid from flowing back which makes pump reverse and cause damage. And it also protects other storage tan...

  • Common Utilized Valves in Heating System
    Posted: 09/23/2016 16:07:21 Hits: 8

    The common utilized valves in heating system include globe valve, gate valve, butterfly valve, ball valve, check valve, safety valve, pressure reduction valve, pressure maintaining valve, balanced valve, regulating valve and other self-operating or electric regulating valve.   Globe valve...

  • Structure & Characteristics of Welded Ball Valve
    Posted: 09/23/2016 16:07:21 Hits: 4

    Structure of welded ball valve: 1. Welded ball valve is made of carbon steel seamless steel tube which is pressed into intergrated welded ball valve. 2. Stem is made of AISI303 stainless steel. Body is made of AISI304 stainless steel which has been grinded finely, having good seal and corrosio...

  • Types of Infiltrants Used to Repair Butterfly Valve
    Posted: 09/23/2016 16:07:21 Hits: 4

    Double offset butterfly valve is widely used in water supply, circulating water of electricity, petroleum, chemical engineering, etc. The common nominal diameter ranges from DN100mm to DN2000mm. The nominal pressure is 0.6MPa~1.6Mpa. In general, double offset butterfly valve is used as regulation ...

  • High Requirements of Pipe Transmission on Ball Valves
    Posted: 09/23/2016 16:07:21 Hits: 5

    Long distance pipeline is a global energy supply line, from Arctic Circle to Equator, high mountains to seabed, high lands to deserts, crossing through earthquake zone, marshland, rivers, lakes and mountain slopes. Some of pipelines are erect. Some are buried under the ground and some are operated...

  • Reasons Causing Defects on Castings of Valve
    Posted: 09/23/2016 16:07:21 Hits: 4

    The followings are the reasons causing defects on castings of valve.   1. Pore Pores are formed by gas which cannot escape and remained in metal. The internal wall of pore is smooth and contains gas, which has higher reflectivity. Pores show spherality or ellipsoid basically (spot defec...

  • How a Gate Valve Functions
    Posted: 09/23/2016 16:07:21 Hits: 3

    As we know, gate valve is widely used to control the flow of liquid from straight line medium in many places. The instance ones would be in irrigation, also apply for various chemical plants to manage the path of different types of fluids.    On the basis of detailed designs, Gate va...

  • Tips for Installing Silent Check Valve
    Posted: 09/23/2016 16:07:21 Hits: 2

    Silent check valve is a kind of automatic valves whose disc can open or close automatically based on fluid media inside pipes flowing. The disc of valve rotates with the centerline of body. Under the pressure of media in one direction, the disc opens; when media flow reversely, the disc closes aut...

  • Differences between Forging and Casting Valves
    Posted: 09/23/2016 16:07:21 Hits: 9

    Forging is a kind of process that using metal forming machinery presses to metal billet, making it deform plastically to acquire mechanical properties, shape and size.    Forging is a common forming process widely utilized in machinery. Forging can eliminate cast loose and welding ho...