Butterfly valve 1) Material: WCB, WCC 2) Precess: casting and precision maching 3) Usage: butterfly valve part OEM Butterfly valve Details:1) This product is among our casting parts. Our annual export for only this part reaches 100,00 pieces which equals to about 35 ton of casting. 2) Our skills for producing this kind of casting are very mature, including material control, quality inspection. We ...