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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 – 15 of 202 results
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™ 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
4

Pyrex™ Borosilicate Glass Stopcock with Key

Manufactured from Pyrex™ borosilicate glass with PTFE key, for superior chemical resistance. Pyrex™ Borosilicate Glass Stopcock with Key are made to a taper of 1:10 giving a combination of performance and ease of operation.

Includes PTFE key, Plastic screw thread retaining device
Material Borosilicate Glass
6

Masterflex™ 4-way Stopcock

Use these stopcocks for a variety of applications. Cole-Parmer™ 4-way Stopcocks feature a PC body and an HDPE stem.

Outlet Port Male Luer Lock or A Male Luer Slip
Type Stopcock
Plug Material Polycarbonate and HDPE
Material Polycarbonate,HDPE
7

Thermo Scientific™ Nalgene™ Stopcocks

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
8

BRAND™ PTFE/ Polypropylene T-bore Stopcock

PTFE construction with polypropylene valve lever. Provides outstanding chemical resistance. Includes integrated hose nozzles.

Includes Integrated hose nozzle
Plug Material Polypropylene
Material PTFE
9

Pyrex™ Plain Arms, Straight Bore Stopcock

Externally operated valve to regulate the flow of a liquid.

Type Straight Bore Stopcock
Material Borosilicate Glass
10

BRAND™ Straight-Bore PTFE Stopcocks

PTFE construction with polypropylene valve lever. Provides outstanding chemical resistance. Includes integrated hose nozzles.

Includes Integrated hose nozzle
Plug Material Polypropylene
Material PTFE
11

DWK Life Sciences DURAN™ Single way Stopcock, complete with hollow key with glass handle

To be used for higher tightness requirements.

Material Borosilicate Glass (3.3)
For Use With (Application) When working with temperature changes and higher tightness requirements; Installation in glass apparatus and devices
Autoclavable Autoclavable
12

Kartell™ Plastilab™ Straight-Bored Stopcocks

Designed for liquids and gases under low pressure or low vacuum.

EDGE
Material Polypropylene,HDPE
13

Buerkle™ Hose Tubing Stop-Cock

Hose tubing stop-cock – Simple reflux nozzle with two-sided hose nozzle.

Type Hose Tubing Stopcock
Material HDPE
Width (Metric) 7 mm
Pressure 0.3 bar
14

GPE Scientific™ J Young Straight Through Taps, Fine Thread Type

GPE Scientific™ J Young Straight Through Taps, Fine Thread Type are made in various stopcock sizes.

Type Straight through tap, fine thread type
15

Bohlender™ PTFE and PP 3-Way Stopcocks with Hose Connectors

For distributing liquids and gases and the quick and easy disconnection of flow.