For vacuum applications up to 5x10-7torr

The shaft is non-rotating and the primary seal is made with a Viton® O-ring on a tapered seat. PTFE shaft can be used continuously at system temperatures of 230°C (446°F) or intermittently at 275°C (527°F).

Designed with a precision external thread for fine control. Valve can be used as a bleed up to ¹/₂ turn. Full open is at 1¹/₂ turns.