This high-vacuum valve is for use in vacuum applications up to 5×10^-7 Torr.

• Similar to KT826510 series but without tip o-ring exposure
• Designed with a precision external thread for fine control
• Can be used as a bleed up to ¹/₂ turn
• Full open position is at 1¹/₂ turns
• Primary seal is made with a FKM o-ring on a tapered seat
• Non-rotating PTFE shaft can be used continuously at system temperatures of 230 °C or intermittently at 275 °C

Manufactured from 33 expansion, low extractable borosilicate glass.