	Main Valve	ByPass Valve
Vacuum Range	Atmosphere to below 10^-9 Torr	Atmosphere to below 10^-9 Torr
Helium Leak Rate	Less than 1.0 x 10^-9 std cc/sec	Less than 1.0 x 10^-9 std cc/sec
Cylinder Air Pressure	60-100 psig	60-120 psig
Limit Switch Rating, Single Pole, Double Through	5A, 250VAC/5A, 30VDC	n/a
Pneumatic Cylinder Displacement Volume	n/a	0.25 in.³ (4.1 cm³)
Approximate Pneumatic Closing Time	n/a	100 msec
Blow-By Pressure	n/a	47 psia
Maximum Internal Spring Closing Pressure	n/a	40 psia

Port Size	Actuator Cylinder Volume	Actuation Opening/Closing Time	Blow By Pressure	Maximium Internal Spring Closing Pressure
2.0 in. (NW50)	13.3 in.³(218 cm³)	1,000/2,000 msec	45 psia	38 psia
3.0 in. (NW80)	27.6 in.³(453 cm³)	2,000/2,000 msec	38 psia	40 psia
4.0 in. (NW100)	27.6 in.³(453 cm³)	2,000/2,000 msec	30 psia	30 psia

Port Size	Actuator Cylinder Volume	Actuation Opening/Closing Time at 100 psi	Blow By Pressure	Maximium Internal Spring Closing Pressure
1.0 in. (NW25)	1.2 in.³(20 cm³)	40/90 msec	80 psia	43 psia
1.5 in. (NW40)	2.2 in.³(36 cm³)	60/90 msec	50 psia	60 psia
2.0 in. (NW50)	6.4 in.³(105 cm³)	160/220 msec	45 psia	38 psia

Jalapeño Heated Vacuum Isolation Valves

Model: heated-isolation-valves