HVAC ventilation pipe valve selection

HVAC pipe valve selection design 1, chilled water unit, cooling water import and export design butterfly valve; 2, before the pump butterfly valve, filter, pump check valve, butterfly valve; Differential bypass valve; 4, set, diverter into, back to the butterfly valve 5, the level of the butter

Several factors that make meter accurate

The instrument that measures the amount of water used by the user is a water meter, which is the basis for the user to pay the water fee. Urban water supply requires the use of a large number of water meters. The operating profit of the water supply company is