GI high vacuum butterfly valve is used to put through or cut off the airflow in vacuum pipeline. Applicable medium can be pure air and noncorrosive gases.
閥體、閥蓋、閥桿：碳鋼或不銹鋼 密封件：丁腈橡膠、氟橡膠。
Body, bonnet and stem: carbon steel or stainless steel Sealing element: NBR, Viton
