High-pressure angle stop valve
I. Introduction:
The J44Y high-pressure angle stop valve is one of the most widely used valves. It is widely favored because the friction between the sealing surfaces during opening and closing is small, it is durable, the opening height is small, it is easy to manufacture, and it is convenient to maintain. It is not only suitable for medium and low pressure, but also for high pressure. The opening and closing part of the angle stop valve (Chengde type) is a plug-shaped valve disc, the sealing surface is flat or conical, and the valve disc moves linearly along the center line of the fluid. The angle stop valve is also called an angle valve. The valve stem has two movement forms: the rising stem type (the valve stem rises and falls, the handwheel does not rise and fall), and the rising and rotating stem type (the handwheel rotates and rises and falls together with the valve stem, and the nut is located on the valve body). The stop valve belongs to a forced-seal type valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface of the stop valve not to leak. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the "angle stop valve" is greater than the force to open the "angle stop valve", so the diameter of the valve stem must be large, otherwise the valve stem may bend.
II. Manufacturing Standards:
● Flange dimensions: ANSI/ASME B16.5, JB/T79, GB9113
● Pressure and temperature: ANSI/ASME 16.34, GB/T9131
● Face-to-face dimensions: ANSI/ASME 16.10, BS1873, GB/T12221
● Butt welding connection dimensions: ANSI B16.25, GB/T12224
● Inspection and testing: BS6755, GB/T13927
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