Product Name: J41H-25C GB shut-off valve

Product Type: GB globe valve type

product description:

       J41H-25C GB shutoff valve details ": cut-off valve is closed parts (valve) moves along the centerline of the valve seat valve according to the form of this movement, the change is associated with port seat valve stroke into. proportional relationship. As such the valve stem to open or close the relatively short trip, but also have very reliable cutting function, but also because the trip is proportional valve port and valve changes, and is very suitable for flow regulation Therefore, this type of valve is suitable for cut or regulation and throttle use.

       Once the cut-off valve of the valve away from the closed position, between its valve seat and valve sealing surface is no longer in contact, and thus its sealing surface mechanical wear is very small, so the sealing performance is good, the disadvantage isIt may be sandwiched between the particles flowing medium sealing surface. However, if the valve ball or balls made of this problem and the solution will meet tough. Since most of the valve seat and valve repair or replacement is relatively easy, and in the repair or replacement of the sealing element without dismantling the entire valve from the line down, which in the valves and pipes welded into one of the occasions are very applicable.Since the media through the valve when the flow direction of such a change, and therefore the minimum cut-off valve flow resistance is also higher than most other types of valves. However, according to the body structure and the valve stem with respect to the inlet and outlet channels of distribution, this situation can be improved. at the same time. Since the cut-off valve between the opening and closing of a small stroke, the sealing surface can withstand repeated opening and closing, so it is very suitable for frequent switching applications.

       Shut-off valve can be used in most of the media flow system. Has been developed to meet the petrochemical, power, metallurgy, construction, chemical and other departments for various uses various forms of cut-off valve.

       Cut-off valve is extremely widespread use, but because of the larger opening and closing moments, the structural length is longer, usually nominal diameter of 250mm or less are limited, but also to 400mm, but the need to pay special attention to the selection of import and export orientation. Most general 15Omm following media from the bottom of the cut-off valve valve inflow, while above the cut-off valve 2O0mm media mostly flow from the top of the valve flap. This is the moment due consideration to the valve closed. In order to reduce the opening or closing moment, the general 2O0mm more shut-off valves are located outside the bypass or bypass valve.

The most obvious advantage of the cut-off valve is:

(1) In the opening and closing process, due to the friction valve flap and valve sealing surface than the gate is small, and thus wear.

(2) The opening height is typically only seat channel diameter of l / 4, and therefore smaller than the gate.

(3) is usually on only one valve and valve sealing surface, and thus the manufacturing process is better, ease of maintenance. However, the cut-off valve of the shortcomings can not be ignored. The main disadvantage is the relatively large flow resistance coefficient, thus causing the pressure loss, especially in the hydraulic apparatus, this pressure loss is particularly evident.

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