The QSB quarter swing valves are compact, quick acting, high conductance isolation valves. The QSB valves have a polished, stainless steel, ISO flanged body with fluoroelastomer ‘O’ ring sealed valve plate and shaft. The valve plate ‘O’ ring groove is vented to help maintain a stable high vacuum. The valve shaft ‘O’ rings and bearings are lubricated with Fomblin® grease to prevent gas bursts from behind the shaft seals.
This valve is supplied with a trapped ‘O’ ring.
|Valve plate material||AISI 304 stainless steel|
|Operating pressure range||10-9 - 3000 mbar|
|8 x 10-10 - 2250 Torr|
|Maximum pressure differential||1000 mbar / 750 Torr|
|Operating temperature range||5 - 40 °C|
|Maximum baking temperature||200 °C (without actuator)|
|Leak rate||< 10-9 mbar l s-1|
|8 x 10-10 Torr l s-1|
|Conductance *||13000 l s-1|
|Operating Torque||19.5 Nm|
* Conductance of equivalent tube length