High Vacuum Stopcocks – Straight Bore

Our straight bore high vacuum stopcocks feature a direct, in-line flow path where the bore runs parallel to the plug handle. When fully open, the straight bore offers an unobstructed, clear passage, making it ideal for applications requiring maximum flow rate, easy cleaning, or visual alignment of the bore position.

Key Features

Straight Bore Design: Unobstructed in-line flow for high throughput and easy cleaning with a pipe cleaner.
Hollow Glass Plug: Lightweight construction reduces rotational force and stress on glass joints.
Visual Flow Indicator: Handle position directly indicates bore orientation (parallel = open, perpendicular = closed).
Borosilicate Glass: High chemical resistance and thermal shock endurance.
High Vacuum Rated: Leak-tight performance up to 10⁻⁶ Torr with minimal grease.

Typical Applications

High-flow gas/vacuum manifolds
Schlenk lines requiring rapid evacuation or backfill
Distillation bridges and condensers
Reactors needing drain valves for viscous fluids

Available Specifications

Parameter
Options

Bore Size (ID)
2mm, 4mm, 6mm, 8mm, 10mm, 12mm

Plug Type
Hollow plug (standard), Hollow plug with PTFE locking ring

Connection Ends
Glass tube ends, Standard Taper joints

Material
3.3 Borosilicate Glass

Need a custom bore size or joint configuration? Contact us for a quote.