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Home >> Insulation valve >> Forged globe valve flanged end insulation
Forged globe valve flanged end insulation

    Forged globe valve flanged end insulation

  • Product Description
  •        Cut-off valve opening and closing parts of the plug-shaped valve, flat or cone, appear before the valve seal along the centerline of the fluid in a straight line. Stem form of exercise with lifting rod (stem down, the hand wheel does not lift), but also lift rotating rod (hand wheel and stem rotation movements, nut located in the body). Valve is only suitable for fully open and fully closed, it does not allow for adjustment and throttle.

           Shut-off valve is mandatory sealed valve, so when the valve is closed, must exert pressure on the valve to force the sealing surface does not leak. When the media from below the valve into the valve, the operating force required to overcome the resistance, is the stem and packing friction thrust by the pressure generated by the media, close the valve of the force is greater than the force to open the valve, so the valve rod diameter should be large, otherwise the stem benders failures occur. In recent years, from the emergence of self-sealing valve, the medium flow shut-off valve on the change into the valve chamber from above the valve, then at medium pressure, a small off valve force, and force open the valve, the valve stem diameter can be reduced accordingly.Meanwhile, in the role of the media, this form of valve is also relatively tight. Chinas valve "three to" has been specified, the cut-off flow valve, should be top-down. At the time of when the valve is open, the valve opening height, the nominal diameter of 25 percentage to 30 percentage, the flow has reached the maximum, indicating that the valve has reached the fully open position. So off fully open position of the valve, the valve stroke should be determined.

           Valve has the following advantages: a simple structure, manufacture and maintenance more convenient. 2. The working stroke is small, open and close a short time. 3. The sealing between the sealing surface friction force is small, longer life expectancy.

           shortcomings shutoff valve is as follows: 1 fluid resistance, larger force required to open and close. 2. Not applicable with particles, viscosity, easy to medium coke. 3. Adjust the poor performance.

           Cut-off valve structural forms: 1. the type of valve closing position of the valve stem threads are divided by external thread type, thread type. According to the flow of media points, straight-through, DC type and angle type. Press the seal in the form of cut-off valve points, packing shutoff valve and bellows sealed globe valve. 2. The cut-off valve body structure form has straight-through DC and right angle. Straight-through is the most common structure, but resistance to its maximum fluid. DC-type fluid resistance is small, used for containing solid particles or viscosity of the fluid. Angled body more forged for smaller circulation, the higher pressure shut-off valve.


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Address:570-2 Three three-way Marina Park Economic and Technological Development Zone,Wenzhou    Tel:0577-85885681    Fax:0577-86830681
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奥门新浦京8867|澳门威尼24848网址

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