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 Co-Seal.
| Edwards Vacuum | |
|---|---|
| Product Category | Vacuum Valves |
| Product Number | QSB250 |
| Product Name | Quarter Swing Butterfly Valve |
| Type | Butterfly |
| Port OD | ? to 10 inch (? to 254 mm) |
| Vacuum / Pressure Range | (UHV, < 10-8 torr); Elevated or positive pressures (>> 760 torr) |
| Temperature Range | ? to 32 F (? to 0.0 C) |
| Port Flange & Seal Type | ISO flange; ISO250 |
