the types of the ball valve according to the different function

　　According to the different functions of the ball valve, we can divide the ppr pipe made in china into four types, do you know the specifically name of what they are? The professionalppr pipe made in china manufacturer will give you a detailed explain in the next paragraph:

　　1,the bypass valve:this kind of the ppr pipe made in china is aways turn on when it is in the water, so when you install the bypass valve, you should filled it with water, then install the bypass valve.

　　2.the air ball valve: when put some water into the air ball valve, the switch of the air float bowl is turn off, so when we filled this kind of the ppr pipe made in china with water, we should turn off the switch of the air float bowl.

　　3.The pressure relief ball valve: to protect of the cover of the ball valve, when we draining water from the sealed cap, when we turn off and turn on the valve.

　　4.The pollution discharge ball valve: this kind of the ppr pipe made in china is used to draining the pollution water which in the low part of the sheel.