DIN 11832-1
DIN 11832-1 Farm and livestock husbandry equipment; shut-off valves for slurry pipes; gate valves for static pressure of max. 1 bar
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/1990
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/1990