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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

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

Heavy-duty nylon

Promotions are available
2

Bel-Art™ SP Scienceware™ Stopcocks

With a removable, leak-proof plug made of chemical-resistant, non-stick PTFE with barbed tubulations that accept 1/4 to 3/8 in. I.D. tubing

Autoclavable Autoclavable
3

Thermo Scientific™ Nalgene™ Stopcocks

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

EDGE
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

Thermo Scientific™ Nalgene™ Three-way Stopcock

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.

EDGE
Outlet Port Tubulated
Type Stopcock
Plug Material Polypropylene
Material Polypropylene
5

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
6

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
7

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
8

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
9

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
10

Thermo Scientific™ Nalgene Stopcock Assembly for Acrylic Burets

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

11

DWK Life Sciences Kimble™ KIMAX™ Buret PTFE Stopcock Assemblies
SDP

For 03-700-12 Series burets.

Promotions are available
12

DWK Life Sciences Kimble™ 2 mm Varibor Metering Value Stopcock Plug
SDP

Allows delivery of preset volumes of gases or liquids to reactions using the needle value

Promotions are available
13

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
14

Bel-Art™ SP Scienceware™ Replacement Stopcocks

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

15

DWK Life Sciences Kimble™ Replacement Stopcock
SDP

Replacement for 17062F Series Burets

Promotions are available