High temperature and high pressure globe valve, also known as shutter, is one of the most widely used valves. The reason why it is popular is that the friction between close covers is small, durable, the opening height is not large, the manufacture is easy, and the maintenance is convenient. It is not only suitable for medium and low pressure, but also suitable for high pressure. Its closing principle is that depending on the pressure of the valve bar, the disc sealing surface and the seat sealing surface are tightly glued to prevent the flow of the medium.
the high temperature and high pressure globe valve is a plug-shaped disc, the sealing surface is plane or conical, and the disc moves in a straight line along the center line of the fluid. The movement form of valve stem is lift rod type (valve rod lifting, handwheel does not rise and fall), there is also lift rotating rod type (handwheel rotates with valve stem together, nut is set on valve body).
When the high temperature and high pressure g
lobe valve is opened, the opening height of the disc is 25% ≤ 30% of the nominal diameter, the flow rate has reached the maximum, indicating that the valve has reached the full open position. Therefore, the full open position of the globe valve should be determined by the stroke of the disc.
The hand-wheel, handle-operated land cut-off valve can be installed in any position of the pipe.
The hand wheel, handle and actuating mechanism shall not be used for lifting.
The flow direction of the medium should be consistent with the arrow direction shown in the valve body.