Globe-Retarding chamber H
https://thiendang.net/thidaco/catalog-pccc/thiet-bi/van-chua-chay/alarm-check-valve/Globe-Retarding chamber H.pdf
https://thiendang.net/thidaco/catalog-pccc/thiet-bi/van-chua-chay/alarm-check-valve/Globe-Retarding chamber H.pdf