Structure type: swing type Applicable industry: building nominal diameter (DN): DN32, DN15, DN20, DN50, DN40, DN65, DN100, DN80, DN25 valve body material: brass flow direction: one-way connection type: thread temperature environment: normal temperature shape: diaphragm type action mode: single-acting valve action: check sealing material: brass lining material: copper alloy pressure environment: atmospheric pressure applicable medium: water brand: Kawerner valve disc form: lifting valve plate use: check valve standard: national standard can be equipped with accessories: valve body sealing mode: hard sealing type: swing valve disc quantity: single disc structure Function: slow-closing type specification and model: DN15 4 points light-80g, DN20 6 points light-100g, DN25 1 inch light-145g, DN15 4 points medium-thick-105g, DN20 6 points medium-thick-140g, DN25 1 inch medium-thick-190g, DN32 1.2 inches medium-thick-285g, DN40 1.5 inches medium-thick-410g, DN50 2 inches medium-thick-595g, DN65 2.5 inches medium-thick-1550g, DN80 3 inches medium-thick-2100g, DN100 4 inches medium-thick-3700g, DN15 4 points thickened-130g, DN20 6 points thickened-210g, DN25 1 inch Thickened - 305g, DN32 1.2-inch thickened - 430g, DN40 1.5-inch thickening - 590g, DN50 2-inch thickening - 860g type (channel position): straight-through drive mode: manual