Traditional Culture Encyclopedia - Weather forecast - What should I pay attention to when operating low temperature valve, normal temperature valve and high temperature valve?

What should I pay attention to when operating low temperature valve, normal temperature valve and high temperature valve?

(1) high temperature butterfly valve. Butterfly valve with t > 450c (2) Medium temperature butterfly valve. 120c < t < 450c butterfly valve (3) normal temperature butterfly valve. 1.40℃ < 1℃.

2. When the weather is cold, if the water valve is closed for a long time, the accumulated water behind the valve should be excluded. After the steam valve stops, the condensed water should also be removed. The bottom of the valve is like a plug, which can open the drain.

3, nonmetallic valves, some hard and brittle, some low strength, operation, the opening and closing force can not be too big, especially can not make it strong. Also pay attention to avoid object collision.

4. When the new valve is used, the packing should not be pressed too tightly to avoid leakage, so as to avoid excessive stress on the valve stem, accelerating wear and opening and closing difficulties. Butterfly valve 120 C (4) low temperature butterfly valve. A butterfly valve100 < t < 40 c (e) ultra-low temperature butterfly valve. T <100 c butterfly valve