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.
阀体、阀盖、阀杆：碳钢或不锈钢 密封件：丁腈橡胶、氟橡胶。
Body, bonnet and stem: carbon steel or stainless steel Sealing element: NBR, Viton
