Overview
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.
Technology
The pneumatic operation valves each have microswitches to indicate when the valve is open or closed. The QSB250P valve has a single acting actuator to open the valve and a spring to close the valve. The actuator link of all pneumatic operation valves is enclosed by a safety cover. Electropneumatic control valves are available as optional.
Use 5-port control valves for the double acting actuator on the QSB63P, QSB100P and QSB160P valves and use 3-port control valves for the single acting actuator on the QSB250P valve.