Stopcocks

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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1 – 30 of 173 results
1

Thermo Scientific™ Nalgene™ Three-way Stopcock
GSA_VA

Experience in-house fluid transfer system flexibility with this three-way stopcock, arranged in a T-shape to simply any two — or all three — arms of the stopcock with ease.

Outlet Port Tubulated
Type Stopcock
Plug Material Polypropylene
No. per Case 4
Material Polypropylene
No. per Pack 1
2

Thermo Scientific™ Nalgene Stopcock Assembly for Acrylic Burets

3

Thermo Scientific™ Nalgene™ Stopcocks
GSA_VA

Develop in-house fluid transfer systems for accurate filling or dispensing. These stopcocks provide reliable, accurate liquid flow control.

Type Stopcock
For Use With (Equipment) In-House Fluid Transfer System
Plug Material Polypropylene
No. per Case 6
Material Polypropylene
No. per Pack 1
4

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.
5

DWK Life Sciences Kimble™ Replacement Stopcock

Replacement for 17062F Series Burets

Promotions are available
6

DWK Life Sciences Kimble™ Stopcock Plugs

Parts: PTFE nut, rubber washer and PTFE washer

Promotions are available
7

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

Replacement stopcock for educational buret 17121H.

Promotions are available
8

DWK Life Sciences Kimble™ KIMAX™ Buret PTFE Stopcock Assemblies

For 03-700-12 Series burets.

Promotions are available
9

DWK Life Sciences Kimble™ Kontes™ FlexColumn™ Three-way Luer Stopcock

Heavy-duty nylon

Promotions are available
10

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

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

Promotions are available
11

Bel-Art™ SP Scienceware™ Replacement Stopcocks

Polypropylene body has Teflon™ PTFE plug, washer and bright red handle

12

Synthware™ 90° High Vacuum Hollow Plug Stopcock
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
13

Synthware™ Straight Bore Glass Stopcock
SDP

Plugs and barrels are ground to be interchangable.

Type Straight Bore
Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
14

Synthware™ Double Oblique Bore Glass Stopcock
SDP

Double Oblique Bore Stopcock has diagonal, parallel bores to allow connection of single stem to both stems on the opposite side. Hollow glass plug option is precision ground with corresponding numbers on the barrel and the plug

15

Synthware™ Straight Bore High Vacuum Glass Stopcock
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
16

Synthware™ Oblique Bore Hollow Plug High Vacuum Stopcock
SDP

Stem OD: 10 or 16 mm, with hollow plug, Precision ground with corresponding numbers on the barrel and the plug.

Type Oblique, Hollow, High Vacuum
Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
17

Synthware™ Replacement for Straight Bore Glass Stopcock, Plug Only
SDP

Glass plug ONLY.

Type Replacement Stockcock
For Use With (Equipment) S69 Series
Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
Autoclavable Autoclavable
18

Synthware™ Offset High Vacuum Hollow Plug Stopcock
SDP

Stem OD: 8, 10 or 12 mm available, with hollow glass plug, Precision ground with corresponding numbers on the barrel and the plug.

Type Offset Glass High Vacuum Valve
Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
19

Synthware™ Straight Bore Stopcock
SDP

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

Type Straight Bore
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
Autoclavable Autoclavable
20

Synthware™ Replacement Straight Bore Stopcock
SDP

Supplied with PTFE plug, one PTFE washer and one O-ring.

Includes PTFE plug, One PTFE washer, One o-ring
Type Straight Bore
For Use With (Equipment) Straight Bore Tap
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
21

Bel-Art™ SP Scienceware™ Two-Piece Stopcocks

Two-piece design snaps together forming a tight seal, and the free-turning key needs no lubrication

Connectors Barbed
Type 2-piece
For Use With (Equipment) Flexible plastic or rubber tubing
Material Polyethylene
Fits Tubing ID 12.7 mm
Pressure 7 psi
22

Synthware™ Replacement Metering Stopcock
SDP

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

Type Metering
For Use With (Equipment) Metering Valve
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
23

Synthware™ Replacement 120° Bore Stopcock
SDP

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

24

Synthware™ Double Oblique Bore PTFE Stopcocks
SDP

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

Type Double Oblique
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
25

Synthware™ 120° Bore Stopcock
SDP

Bored to allow connection of any two arms at once.

26

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

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

27

Synthware™ Replacement for T-Bore Glass Stopcock, Plug ONLY
SDP

Glass plug ONLY.

Plug Material Glass
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
28

Synthware™ Replacement Double Oblique Bore Stopcock
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
Plug Material PTFE
Material Borosilicate Glass
For Use With (Application) Organic Synthesis
29

Synthware™ Replacement T-Bore Stopcock
SDP

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

Type T-Bore
For Use With (Equipment) T-Bore Tap
Plug Material PTFE
Material PTFE
For Use With (Application) Organic Synthesis
30