Stopcocks

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  • Image of Scienceware® Bobbitt Valves

    Scienceware® Bobbitt Valves

    On/off valve for insertion in tubing line to control liquid flow Finger pressure on body of valve controls flow, from one drop to a continuous stream Inner parts coated with fluorocarbon plastic; valve ball is glass Serrated polypropylene end couplings take 1/4” i.d. tubing. Overall length...
  • Image of Double Vacuum/Gas Manifolds With PTFE Valves

    Double Vacuum/Gas Manifolds With PTFE Valves

    For connecting inert gas and vacuum sources Grease-free, fine control is provided by 4 mm PTFE HI-VAC® valves. Sample contacts only PTFE and borosilicate glass. Beams are 1/2” (12.7 mm) O.D. with upper left and lower right ends open. Delivery ports are 9 mm O.D and the distance between...
  • Image of Labeled Bench Service Stopcocks

    Labeled Bench Service Stopcocks

    Of chrome-plated brass Spring-loaded ground key stopcock with index labeled gas, air or vacuum Maximum recommended gas line pressure 10 psi (69 kPa) Have 3/8” i.p.t. male thread and serrated outlet 48 mm long, which tapers from 13 mm to 6 mm. Outlet bore 3 mm without flange.
  • Image of Leash

    Leash

    Item #: 8685L79
    For securing stoppers to neck of vessel or stopcock plugs to shell Rubber strip, 100 mm long x 5 mm wide, has hole 10 mm diameter at each end, expandable to 28 mm
  • Image of Nalgene Polypropylene Straight Bore Stopcocks

    Nalgene Polypropylene Straight Bore Stopcocks

    Polypropylene with Teflon® TFE plug No lubrication required Offered in 2 mm and 4 mm bore sizes Arms are five-mm bore, serrated to take 1/4 to 7/16 inch rubber tubing
  • Image of Needle Valves, V-Point

    Needle Valves, V-Point

    With forged brass body, sharp stainless steel needle and small opening at the seat for accurate control of small flow of gases at inlet pressures up to 3000 psig at 70°F (20.7 MPa at 21.1°C) Maximum temperature rating: 450°F (232°C) Useful also for water, compressed air and vacuum....
  • Image of One-Or-Two Place Air: Gas: Vacuum Stopcocks

    One-Or-Two Place Air: Gas: Vacuum Stopcocks

    Pedestal-style single or double cock for mounting on top or on splash shield of bench Maximum recommended line pressure 69 kPa (10 psig) Chrome-plated brass Spring-loaded stopcocks take included snap-in buttons labeled GAS, AIR or VACUUM (specify when ordering) Serrated outlets are 48 mm long,...
  • Image of PYREX Brand Stopcocks

    PYREX Brand Stopcocks

    Valves, In-Line, Rotaflo® For vacuum or pressure work Borosilicate glass, with Teflon® stem providing chemically inert seal Require no lubrication Permit precide control of liquid or gas flow at temperatures from -40°C to +200°C Maximum vacuum 10 -8 torr (10 -6 Pa) Plastic control...
  • Image of Stopcock Assembly

    Stopcock Assembly

    Phase interface visible down to stopcock. Polypropylene funnel and screw closure are chemically inert, translucent, autoclavable and have no known solvents at room temperature. Susceptible to softening and swelling from strong oxidizers and aggressive solvents. TFE stopcock assembly has excellent...
  • Placeholder Image for Stopcock Assy 25ml

    Stopcock Assy 25ml

    Item #: 1228A62
    Pack of 2 Stopcock Assemblies, 25 mL
  • Image of Stopcock, 2 mm

    Stopcock, 2 mm

    Item #: 8675F44
    As supplied with 1983J70 and J76 Kimble Economy Burets Plug bore two mm Also for replacement on Kimble 17800 and 17810 series Chromatography Columns and Kimble 29050-H and 29060-H series Separatory Funnels.
  • Image of Stopcock, 4 mm, w/o Plug

    Stopcock, 4 mm, w/o Plug

    Item #: 8655J59
    Without Teflon plug Offered in 4 mm bore size; see 8682B34 for stopcock
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