Bellows-sealed, With visual position indicator, Normally closed (n. c.), Service life, 3 million operating cycles
Spindle drive with ergonomic handwheel for continuous opening, Bellows-sealed, With visual indication of open and closed positions, Service life, 20000 operating cycles
Bellows-sealed, With visual position indicator, Normally closed (n. c.), Service life, 1 million operating cycles
Don't worry we won't leave you in a vacuum