First, no negative pressure control valve The main role is to compensate for the rise in the tank air expiration, water is full, the water level inside the tank to reduce the vacuum suppressor open, inhalation of the atmosphere, to prevent the formation of a vacuum. Its function is full of water with pressure for the relay state, in short supply for the water level decline for the compensation state. Second, the characteristics of non-negative pressure control valve 1, all made of stainless steel, improve equipment grades, the use of embedded structure design, small size, easy installation. 2, the use of flexible lip double seal, equipped with filtration devices, effectively intercepting the impact of bacterial dust on water quality.
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