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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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361 – 375 of 447 results
361

Ace Glass, Inc. 0-15MM BARREL (GB)
SDP

0-15MM BARREL (GB)

ENCOMPASS_PREFERRED
362

Ace Glass, Inc. 4MM HI VAC S/C HLW (GLASSBLOWER)
SDP

4MM HI VAC S/C HLW (GLASSBLOWER)

ENCOMPASS_PREFERRED
363

Ace Glass, Inc. Flask, reaction/storage, 500mL, no 15 O-ring joint, 4mm glass stopcock side arm, No-Air, Schlenk
SDP

Flask, reaction/storage, 500mL, no 15 O-ring joint, 4mm glass stopcock side arm, No-Air, Schlenk

ENCOMPASS_PREFERRED
364

Chemglass Life Sciences Stopcock, Double Oblique, Glass Plug, High Vacuum, 4mm Bore, 16.2/56 Plug Size, 10mm OD Sidearms
SDP

Solid glass high vacuum stopcock with the Chemglass constant pressure retention device. This retaining system incorporates a glass plug having an extended snelling which accepts a stainless steel spring and clip. The spring keeps constant tension on the plug at all times and is easily removed and attached. Similar to CG-458, but with two parallel oblique bores. Plug is precision ground and hand-lapped with corresponding numbers on the barrel and plug. Each stopcock is supplied complete with a stainless steel spring and clip. Replacement retention kit consists of one spring and clip for the plug size listed.

ENCOMPASS_PREFERRED
365

Ace Glass, Inc. 0-3mm vacuum stopcock needle valve
SDP

0-3MM VAC STOPCOCK (GLASSBLOWER)

ENCOMPASS_PREFERRED
366

Ace Glass, Inc. 0-3mm vacuum stopcock with UHDPE handle PTFE plug
SDP

0-3MM VAC STOPCOCK (GLASSBLOWER)

ENCOMPASS_PREFERRED
367

Ace Glass, Inc. 2MM STOPCOCK (GB)
SDP

2mm Newman type stopcock is used with a distilling head to enable the operator to determine reflux ratios and take-offs. Process is described in Industrial and Engineering Chemistry, Volume 14, No. 11, Page 902, Nov. 15, 1942.

ENCOMPASS_PREFERRED
368

Ace Glass, Inc. 4mm hi vacuum stopcock HLW double oblique
SDP

4mm precision-grade, hi vacuum stopcock, with double oblique bore hollow plug. Plug has a hole to permit evacuation of the lower chamber, and prevents leakage through the bottom.

ENCOMPASS_PREFERRED
369

Ace Glass, Inc. 0-3MM 3-WAY S/C (GB)
SDP

0-3MM 3-WAY S/C (GB)

ENCOMPASS_PREFERRED
370

Grainger ROUND BELT SOLID 4MM POLYURETH

502758876 ROUND BELT SOLID 4MM POLYURETH

ENCOMPASS_PREFERRED
371

Chemglass Life Sciences Stopcock, Straight Bore, Glass Plug, 1-Arm Larger, 4mm Bore, 17/40 Plug Size, 10mm & 12mm OD Sidearms, #4 Clip Size
SDP

Stopcock, Straight Bore, Glass Plug, 1-Arm Larger, 4mm Bore, 17/40 Plug Size, 10mm & 12mm OD Sidearms, #4 Clip Size. Similar to CG-400, but with one arm of the stopcock being of a larger diameter. Larger arm facilitates construction of stronger apparatus such as separatory funnels and burets. Supplied complete with the listed size metal retaining clip CG-423.

ENCOMPASS_PREFERRED
372

Teledyne ISCO, Inc P/Pv Assy, Pk, 3-Way

P/PV ASSY, PK, 3-WAY

ENCOMPASS
373

McKesson General Medical MCKESSON MEDICAL SURGICAL

NC3906321 3-WAY STOPCOCK STD BORE 50/CS

ENCOMPASS_PREFERRED
374

Ace Glass, Inc. 0-14MM HI VAC S/C (GLASSBLOWER)
SDP

0-14MM HI VAC S/C (GLASSBLOWER)

ENCOMPASS_PREFERRED
375

Ace Glass, Inc. Stopcock 4mm bore w/plug w/threaded extension
SDP

Stopcock 4mm bore w/plug w/threaded extension

ENCOMPASS_PREFERRED