B2 - Schoonover, Inc.

Safety Valves
Vacuum Valves
Safety Valves
Vacuum Safety Valves
♦ Fast-closing high vacuum isolation valve for separating the vacuum
chamber from the backing pump
♦ Venting valve for roughing pumps
♦ Immediate closing action upon power failure
♦ Opening action only after the intake line has been evacuated
Technical Data
Vacuum connection DN 16 ISO-KF DN 25 ISO-KF DN 40 ISO-KF DN 63 ISO-KF DN 100 ISO-KF
Type VSM016-A VSM025-A VSM040-A VSM063-A VSM100-A
Ordering Information
200 Ð 230 V AC 250-754 250-764 250-774 250-784 250-794
100 Ð 115 V AC 250-752 250-762 250-772 250-782 250-792
24 V DC 250-750 250-760 250-770 250-780 250-790
230 V AC Eex e II T4, incl. 5 m cable 250-756 250-766 250-776 250-786 250-796
24 V DC Eex e II T4, incl. 5 m cable 250-755 250-765 250-775 250-785 250-795
Tightness mbar l/s 1 x 10 -9 1 x 10 -9 1 x 10 -9 1 x 10 -9 1 x 10 -9
Conductance for molecular flow l/s 2.8 11 30.5 126 400
Can be opened to a pressure difference of mbar 700 700 700 700 700
Bakeout temperature
Housing, actuator ¡C 80 80 80 80 80
Mounting orientation any any any any any
Housing aluminum aluminum aluminum aluminum aluminum
Seal FPM FPM FPM FPM FPM
Weight kg 0.42 0.8 1.3 2.85 4.8
Spare parts
Seal set 215-036 215-086 215-156 215-256 215-276
B8
DN A B C
DN 16 ISO-KF 154 40 36
DN 25 ISO-KF 152 50 60
DN 40 ISO-KF 173 65 80
DN A B C
DN 63 ISO-K 226 88 128
DN 100 ISO-K 265 108 172
B8.31