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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 49 results
1

DWK Life Sciences DURAN™ Single way Stopcock, complete with DURAN™ key with groove

Ground shut-off taps without tap plug.On-and-off taps with DURAN™ grooved tap plugs.

Material Borosilicate Glass (3.3)
For Use With (Application) Installation in glass apparatus and devices
Autoclavable Autoclavable
2

DWK Life Sciences DURAN™ Straight Valve, GU

Globe valve as a low-cost alternative.

Material Borosilicate Glass (3.3), PTFE
No. per Pack 10/Pk.
For Use With (Application) GU valve valves are suitable for lower leakage rate requirements, e.g. for flow control of liquids or gases.; Ideal for dosing and controlling gases and liquids
Autoclavable Autoclavable
Width (Metric) 1.5 mm
3

DWK Life Sciences DURAN™ Straight Valve, PRODURAN™

The perfect solution for dosing and controlling gases and liquids as a through put variant.

Material Borosilicate Glass (3.3), PTFE
No. per Pack 10/Pk.
For Use With (Application) Ideal for dosing and controlling gases and liquids; High vacuum suitability due to the thick-walled attachments; Suitable for installation in glass apparatus for vacuum applications, e.g. for the construction of steering lines (vacuum inert gas lines, nitrogen distribution rakes)
Autoclavable Autoclavable
4

DWK Life Sciences DURAN™ 90° Valve, GU

Angle valve as an inexpensive alternative.

Material Borosilicate Glass (3.3), PTFE
No. per Pack 10/Pk.
For Use With (Application) GU valve valves are suitable for lower leakage rate requirements, e.g. for flow control of liquids or gases.; Ideal for dosing and controlling gases and liquids
Autoclavable Autoclavable
Width (Metric) 1.5 mm
5

DWK Life Sciences DURAN™ 90° valve, PRODURAN™

The perfect solution for dosing and controlling gases and liquids as angle valve.

Material Borosilicate Glass (3.3), PTFE
No. per Pack 10/Pk.
For Use With (Application) Ideal for dosing and controlling gases and liquids; High vacuum suitability due to the thick-walled attachments; Suitable for installation in glass apparatus for vacuum applications, e.g. for the construction of steering lines (vacuum inert gas lines, nitrogen distribution rakes)
Autoclavable Autoclavable
6

DWK Life Sciences DURAN™ Single way Stopcock, complete with PTFE key

Shut-off with PTFE plug for grease free operation.

Material Borosilicate Glass (3.3), PTFE
For Use With (Application) Installation in glass apparatus and devices
Autoclavable Autoclavable
7

DWK Life Sciences DURAN™ Single way Stopcock, ground, without key

Ground shut-off taps without tap plug.

Material Borosilicate Glass (3.3)
For Use With (Application) Coarse dosing of liquids; Installation in glass apparatus and devices
Autoclavable Autoclavable
8

DWK Life Sciences DURAN™ Single way Stopcock, complete with SBW-J-key

Shut-off taps with threaded plug.

Material Borosilicate Glass (3.3), SBW-J, Polypropylene
For Use With (Application) Installation in glass apparatus and devices
Autoclavable Not Autoclavable
Width (Metric) 1.5 mm
11

DWK Life Sciences DURAN™ Separating Funnel stopcock Gilson, complete with PTFE key

For attaching to DURAN™ separating funnel raw bodies.

Material Borosilicate Glass (3.3), PTFE
No. per Pack 25/Pk.
For Use With (Application) For attachment to DURAN™ separating funnel raw bodies; For the production of separating funnels according to Gilson
Width (Metric) 1.8 mm
12

DWK Life Sciences DURAN™ Three-way Stopcock, complete with PTFE key, T-bore

3-way tap with PTFE plug for grease free operation.

Material Borosilicate Glass (3.3), PTFE
No. per Pack 5/Pk.
For Use With (Application) Installation in glass apparatus and devices
Autoclavable Autoclavable
Width (Metric) 1.5 mm
14

DWK Life Sciences DURAN™ Capillary-Single way Stopcock, complete with PTFE key

Shut-off with PTFE plug for grease free operation.

Material Borosilicate Glass (3.3), PTFE
No. per Pack 50/Pk.
For Use With (Application) Installation in glass apparatus and devices
Autoclavable Autoclavable
15

DWK Life Sciences DURAN™ Single way Stopcock, ground and polished, without key

Ground and polished shut-off taps without plug for grease free operation.

Material Borosilicate Glass (3.3)
For Use With (Application) Coarse dosing of liquids; Installation in glass apparatus and devices
Autoclavable Autoclavable