This standard specifies acceptance specifications and requirements for liquid ring vacuum pumps. The absolute pressure at the entry of such liquid ring vacuum pumps shall exceed a value of 1 mbar.
DIN 28431:1987 history
2019DIN 28431:2019-03 Vacuum technology - acceptance specifications for liquid ring vacuum pumps
2019DIN 28431:2019 Vacuum technology - acceptance specifications for liquid ring vacuum pumps
1970DIN 28431 E:2018-05 Vacuum technology; acceptance specifications for liquid ring vacuum pumps
2018DIN 28431 E:2018 Draft Document - Vacuum technology - acceptance specifications for liquid ring vacuum pumps
1987DIN 28431:1987 Vacuum technology; acceptance specifications for liquid ring vacuum pumps