LoPro™ Low-profile, Single-stage, Bellows-sealed Poppet Valves are available on www.mks.com
Poppet Valve, Bellows-sealed, NW40 ISO-KF, Inline Ports, Viton, Pneumatic

The LoPro™ LPV1-40-IK-CNVS Inline Vacuum Valve with an inline body configuration, ISO-KF NW40 flanges, and Viton seals has pneumatic actuation. 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.
Specifications
- TypeBellows-sealed Poppet Valve
- ConfigurationInline Ports
- Flange TypeISO-KF
- Flange SizeNW40
- Port SizeNW40
- Vacuum Range10-9 Torr to Atmosphere
- Valve ActuationPneumatic
- Actuation TimeOpening: 0.27 sec
Closing: 0.53 sec - Seal MaterialViton
- Limit SwitchNo
- Cylinder Volume2.2 cubic in.
- Cylinder Air Pressure90 psig ± 30 psig
- Maximum Internal Spring Closing Pressure60 psia
- Maximum Bakeout Temperature150°C
- Typical Life1,000,000 cycles
- Weight3.1 lbs.
