Is the sealing performance of stainless steel castings in valves capable of preventing medium leakage?

Release time:

2023/03/11

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The sealing performance of stainless steel castings in valves refers to the ability of each sealing position of the gate valve to prevent medium leakage, which is an important technical performance index of the gate valve. The valve has three sealing parts, the contact between the opening and closing parts and the two protruding surfaces of the valve seat; The fitting between the packing, valve stem, and packing box; The connection between the valve body and the valve cover. The previous leak is called an internal leak, usually referred to as a loose closure, which can affect the ability of the gate valve to cut off the medium. For block valves, internal leakage is not allowed. The last two leaks are called leaks, which means that the medium leaks from the inside of the valve to the outside. Leakage can cause material loss, pollute the environment, and even lead to accidents in severe cases. For flammable, explosive, toxic, or radioactive media, external leakage is not allowed, so gate valves need to have reliable sealing performance. During the sealing test of the stainless steel casting of the valve, the directly connected cock should maintain the same pressure in the cavity and channel. Rotate the cork to the closed position, inspect from the other end, and then rotate the cork 180 ° to repeat the above test; The three-way or four-way plug valve should maintain the pressure in the cavity equal to one end of the channel. The bottle stopper should be rotated to the closed position in sequence, and the pressure should be introduced from the angled end and checked simultaneously from other ends. The stainless steel casting of the valve quickly discharges the condensed water generated in the steam using equipment, maintaining the heating efficiency of the steam using equipment in a good state, preventing the condensation water from forming retention in the equipment, and ensuring the steam space in the equipment to the maximum extent, thus maintaining the heating efficiency frequently. Once the steam trap cannot fully function, not only is the performance of the steam using equipment greatly affected by the retention of condensed water.

The sealing performance of stainless steel castings in valves refers to the ability of each sealing position of the gate valve to prevent medium leakage, which is an important technical performance index of the gate valve. The valve has three sealing parts, the contact between the opening and closing parts and the two protruding surfaces of the valve seat; The fitting between the packing, valve stem, and packing box; The connection between the valve body and the valve cover. The previous leak is called an internal leak, usually referred to as a loose closure, which can affect the ability of the gate valve to cut off the medium. For block valves, internal leakage is not allowed. The last two leaks are called leaks, which means that the medium leaks from the inside of the valve to the outside. Leakage can cause material loss, pollute the environment, and even lead to accidents in severe cases. For flammable, explosive, toxic, or radioactive media, external leakage is not allowed, so gate valves need to have reliable sealing performance.
During the sealing test of the stainless steel casting of the valve, the directly connected cock should maintain the same pressure in the cavity and channel. Rotate the cork to the closed position, inspect from the other end, and then rotate the cork 180 ° to repeat the above test; The three-way or four-way plug valve should maintain the pressure in the cavity equal to one end of the channel. The bottle stopper should be rotated to the closed position in sequence, and the pressure should be introduced from the angled end and checked simultaneously from other ends.
The stainless steel casting of the valve quickly discharges the condensed water generated in the steam using equipment, maintaining the heating efficiency of the steam using equipment in a good state, preventing the condensation water from forming retention in the equipment, and ensuring the steam space in the equipment to the maximum extent, thus maintaining the heating efficiency frequently. Once the steam trap cannot fully function, not only is the performance of the steam using equipment greatly affected by the retention of condensed water.