The LoPro™ LPV1-40-IK-CLVS Inline Vacuum Valve with an inline body configuration, ISO-KF NW40 flanges, Viton seals has pneumatic actuation and a limit switch.   It has a small footprint that fits easily into existing, and new, vacuum systems. A formed stainless steel bellows prevents outgassing, virtual leaks, and particle entrapment between bellows convolutions that extends the valves life cycle over a conventional O-ring shaft sealed valve.