Stainless steel gate valves and stainless steel stainless steel globe valve 'do not mix' stainless steel gate valve not only widely used in general industrial piping, and liquid oxygen and liquid hydrogen in the nuclear industry, aerospace industry widely used on the pipeline. Large diameter oil ( Or natural gas) Pipeline is an important aspect of a gate valve. In order to ensure the safety of some factory agent according to its characteristics and its use is influenced by the natural conditions, the need for resistance to bending test, to prevent the test of fire spread, resistant to climatic conditions of the comprehensive experiment, emergency cut-off, etc. In order to adapt to the needs of high temperature hair condition, in recent years also developed high temperature resistant gate, it is no longer a ptfe seat material, but metals, graphite and carbon fiber. For stainless steel gate valves and stainless steel stainless steel globe valve, some users may be used to mix. To this, let's do a simple introduction: a structure being installed under the condition of limited space selection should pay attention to: stainless steel gate valve can rely on medium pressure and sealing surface tightly closed, thus to achieve the effect of not leak. When opening and closing the valve core and valve seat sealing surface contact and friction each other all the time, so the sealing surface is easy to wear and tear, gate near closing, pipeline pressure difference is very big, before and after sealing surface wear is more serious. Stainless steel gate structure is more complex than stainless steel globe valve, from the point of appearance, with diameter, gate is higher than stainless steel valve, stainless steel valve than gate valves. In addition, as rising stem and the non-rising stem gate valves. Stainless steel valve. Working principle of being open closed stainless steel globe valves are doing, is the rising stem type, that is to say, turn the handwheel, the handwheel will make rotation and lifting movement along with the valve stem. Stainless steel gate is to turn the handwheel, make stem make lifting movement, the handwheel position itself remains the same. Flow of each are not identical, stainless steel gate valve fully open or close, and stainless steel valve is not required. Stainless steel Industrial Valves has a regulation import and export of direction, gate no direction of import and export requirements. In addition, two kinds of stainless steel gate valves only fully open or close, gate opening and closing of the trip is very big, opening and closing time is long. Stainless steel globe valve valve plate moving distance is much smaller, and stainless steel globe valve valve plate can stop in sports in one place, used for flow rate adjustment. And gate valve is made truncation use only, no other functions. A performance difference between being stainless steel globe valve can be done using the truncated, can be done using the flow control. The fluid resistance of the stainless steel valve is larger, the opening and closing more arduous, but because the valve plate distance sealing surface distance is short, so opening and closing short trip. Gate valves can only be fully open and close, it in the fully open, the body channel within the medium flow resistance is almost zero, so the valve opening and closing will be very effort, but the sealing face distance gate distance, opening and closing time is long. Being installed to flow and to gate valves to two direction effect is the same, the installation without the direction of the import and export requirements, medium can be two-way flow. Stainless steel valve may need to be done in strict accordance with the valve body in the direction of the arrow installation, about import and export of stainless steel valve direction and regulation, the flow of stainless steel globe valve shall be applied. Stainless steel valve is higher than that of low into, there are obvious when viewed from the outside of pipe is not in a level. Gate valve flow in a horizontal line. Gate Industrial Valves stroke than stainless steel globe valve. From the perspective of flow resistance in the wide open gate Industrial Valves flow resistance is small, the check valve flow resistance is big. Ordinary gate valves of the flow resistance coefficient is about 0. 08 - 0. 12, open the closing force is small, medium to two direction. Ordinary stainless steel globe valve flow resistance is 3 - gate valves 5 times. Forced to close to achieve sealing during opening and closing, stainless steel globe valve valve core is in the fully closed contact sealing surface, thus sealing surface wear is small, add actuators because of the large flow of main stainless steel globe valve adjustment should pay attention to the torque control institutions. Being sealed stainless steel globe valve sealing surface on the valve core is a small trapezoidal profile ( Specific look at the shape of the valve core) , fall off once the valve core, valve closed ( If the pressure difference is big, closed lax, of course, but check inverse effect is good) ; Stainless steel gate is to rely on the side of the heart gate to seal, the sealing effect is relatively less stainless steel globe valve.
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