Quick-open, valve-type stopcock with glass barrel, PTFE plug, and FETFE o-rings

Unique design allows introduction of particulates or capsules into a system using a rod or plunger. Because the barrel is angled with respect to the side arms and the plug has a corresponding angled end, a 180° turn not only changes the angle of the plug with respect to the pathway, but this rotation in the threaded barrel provides a “lifting” action that nearly retracts the plug from the pathway; additional turn removes it completely. Resulting unobstructed, quick-open pathway offers many advantages not found in conventional PTFE or glass stopcocks. Size of stopcock refers to I.D. of side arms. Plugs and barrels are not interchangeable. Not recommended for high vacuum.