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Ace pressure tubes with plunger valves and thermowells

capacity ~120 mL

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PTFE cap
borosilicate glass tube
cap (Front-Seal Plunger Valve)
clear tube
round bottom
screw top cap (plugseal)
white cap




graduations: no
internal thread


pack of 1 ea


Ace Glass 8648-170

L × O.D.

20.3 cm × 38.1 mm


~120 mL


38.1 mm

binding type

non-treated surface

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General description

Glass plunger valve has a 5 mm I.D. thermowell for a thermocouple wire or sheathed probe up to 1/8 in. (3.2 mm) diam. Overall length of plunger valve is 190 mm. The thermowell length is 70 mm. Plunger has a hole on the side that, when positioned in relation to the O-ring seal, allows tube to be open or closed to the atmosphere (i.e. pull to close, push to open).

Complete item consists of tube with #15 Ace-Thred, PTFE bushing with FETFE® O-ring, and plunger valve with thermowell.

Replacement FETFE O-rings:

Ace-Thred #Front SealBack Seal
7 Z504661 Z504742
15 Z504858 Z505021
25 Z505056 Z505110

CAUTION: This glassware is not guaranteed against breakage caused by pressure or vacuum. These tubes should never be used if scratched or otherwise damaged.

Legal Information

FETFE is a registered trademark of Ace Glass, Inc.

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