| Media: | Gas |
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| Temperature: | Low Temperature |
| Material: | Stainless Steel |
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Stainless steel check valves only allow medium to flow in one direction and prevent flow in the opposite direction. Usually, check valves operate automatically, and under the pressure of fluid flowing in one direction, the valve disc opens; When the fluid flows in the opposite direction, it is cut off by the fluid pressure, the self weight of the valve disc, and the action of the valve disc on the valve seat. Check valves include swing check valves and lift check valves. The swing check valve has a medium hinge mechanism and a valve disc like a door that freely rests on the inclined seat surface. In order to ensure that the valve disc can reach the appropriate position on the valve seat surface every time, the valve disc is set in a hinge mechanism, so that the valve disc has sufficient swing space and truly and comprehensively contacts the valve seat. The valve disc can be made entirely of metal, or it can be embedded with leather, rubber, or a synthetic covering surface on the metal, depending on the applicable performance requirements. When a swing check valve is fully open, the fluid pressure is almost unobstructed, so the pressure drop through the valve will be relatively small. The disc seat of the lift check valve is located on the sealing surface of the valve seat on the valve body. Except for the free lifting of the valve disc, the rest of the valve is like a globe valve. Fluid pressure lifts the disc from the sealing surface of the valve seat, causing the medium to flow back onto the valve seat and cutting off the flow. According to the applicable conditions, the valve disc can be an all metal mechanism, or it can be embedded with rubber pads or rubber rings on the valve disc holder. Like globe valves, the passage of fluid through lift check valves is also narrow, so the pressure drop through lift check valves is greater than that of swing check valves, and the flow rate of swing check valves is limited very little.
| Sealing method | Consulting customer service | Valve standards | National standard |
| Valve end form | Consulting customer service | Number of valve discs | Consulting customer service |
| Driving method | Manual | structural style | vertical |
| Mode of action | Consulting customer service | Type (channel position) | Binary equation |
| Lining material | Consulting customer service | sealing material | Consulting customer service |
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