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Stopcocks

Stopcocks work as valves, serving to regulate, interrupt or completely stop the flow of a gas or liquid through piping, tubing or a faucet, with tubes attached to the stopcock’s female joint easily separated or connected by a turn of the stopcock. Stopcocks may be held in place by vacuum, rubber rings or clips. Glass stopcocks need stopcock grease for lubricating and sealing the plug and shell. Glass stopcocks with plastic plugs are sealed without grease but are less effective for high vacuum. Plastic plug glass stopcocks, however, work well for low vacuum applications.
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Autoclavable

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16 – 30 of 421 results
16

Synthware™ Replacement T-Bore Stopcock
GREENER_CHOICE SDP

Plug has a T-shaped bore to connect any two or all three stems.

Type T-Bore Stopcock
For Use With (Equipment) T-Bore Tap
Plug Material PTFE
Material PTFE
For Use With (Application) Organic Synthesis
17

Synthware™ Replacement Double Oblique Bore Stopcock
GREENER_CHOICE SDP

Double Oblique Bore Stopcock has diagonal, parallel bores to allow connection of single stem to both stems on the opposite side.

Type Double Oblique Stopcock
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
18

Synthware™ Straight Bore High Vacuum Glass Stopcock
GREENER_CHOICE SDP

Plug is precision ground and hand lapped with corresponding numbers on barrel and plug.

Type Straight Bore - High Vacuum
Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
19

Synthware™ Replacement 120° Bore Stopcock
GREENER_CHOICE SDP

Stopcock has bores to allow connection of any two arms at once.

20

Synthware™ Straight Bore Stopcock
GREENER_CHOICE SDP

Straight Bore Stopcock with a threaded pressure nut. Stopcock barrels are polished to prevent leakage due to uneven surfaces.

Type Straight Bore Stopcock
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
Autoclavable Autoclavable
21

Thermo Scientific™ Nalgene Stopcock Assembly for Acrylic Burets
GREENER_CHOICE

For use with 25 mL Acrylic Nalgene Break-Resistant Burets.

EDGE
22

DWK Life Sciences Kimble™ Straight Bore Stopcock without plug, 4mm
SDP

Straight-bore, sandblasted stopcock with a 1:5 taper.

23

DWK Life Sciences Kimble™ KIMAX™ Burets with Threaded Closures Replacement PTFE Stopcock Assembly
SDP

Replacement stopcock for educational buret 17121H.

24

Corning™ PYREX™ Plain Bore Rotaflo™ Stopcock

Combined PTFE and borosilicate glass forms a leak- and freeze-resistant seal

Type High Vacuum Stopcock
Temperature (English) -4°F to 392°F
Temperature (Metric) -20°C to 200°C
No. per Case 1/Cs.
Material Glass
No. per Pack 1/Pk.
25

DWK Life Sciences Kimble™ Kontes™ PTFE Plug for Straight Bore Stopcocks, Size 2
SDP

PTFE Stopcock Plug size 11/25 for 2mm bore size

26

Synthware™ T-Bore Stopcock, Glass
GREENER_CHOICE SDP

T-shaped bore connects any two or all three stems.

Type T-Bore Stopcock
Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
27

Synthware™ Replacement Metering Stopcock
GREENER_CHOICE SDP

Stopcock comes with a threaded PTFE needle valve for the fine control of flow through the bore of the stopcock plug.

Type Metering Stopcock
For Use With (Equipment) Metering Valve
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
28

Synthware™ 90° High Vacuum Hollow Plug Stopcock
GREENER_CHOICE SDP

Precision ground with corresponding numbers on the barrel and plug.

Type 90° Glass High Vacuum Valve
Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
29

Synthware™ High Volume Double Oblique Bore Glass Stopcock with Constant Pressure Retention
GREENER_CHOICE SDP

Barrel and plug are precision ground, handlapped with corresponding numbers on the barrel and plug.

30

Synthware™ T-Bore Stopcock, PTFE
GREENER_CHOICE SDP

T-shaped bore connects any two or all three stems.

Type T-Bore Stopcock
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis