our company is manufacturer which produce all kinds of ball valve ,check valve,butterfly vlave,stop valve,gate valve,etc. which include flanged connection,female connection,male connection,welded connection,etc. since our company established in 1988,our main ideal is to make our products more and more perfect and good price to keep long business relationship with customer around the world. if have any information you want to get from us,pls don't hesitate to email or contact me.