Does the weather turn cold and your water meter is "warm"?

China National Instrument Network Science and Technology Co., Ltd. Sees that it is necessary to start the winter season. Every winter season, the water meters of many residents' homes are frozen, causing people to worry and worry. On November 3, the reporter learned from the water company of Sha

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Two minutes let you know the cast steel globe valve

Globe valve, also known as the cut-off valve, is a forced-sealed valve, so the valve is closed, the pressure must be applied to the valve flap to force the sealing surface does not leak. When the medium from below the valve into the valve, the operating force needed to overcome the resistance is t

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