It's suitable in all neutral liquid or the gas medium pipeline makes the cut-off to use.the main use includes district connection heating,water supply and natural gas, transmission pipeline ETC.. SKYPE:Idealwang588 ICQ锛?09210947 Email: sales3@hoastar-valve.com MSN:hoastaridealwang@hotmail.com TEL: +86-577-56666967 Cell Phone: +86-13567785037 Contact person: Mrs Ideal Wang