FUNNELS
216
Addition / Hirsch
Graduated Addition Funnels with Pressure Equalizing Line and Glass Stopcock Plug • Cylindrical funnels have a pressure equalizing line, a glass stopcock, and a lower drip tip • Graduations to the stopcock are numbered both up and down • The 299251 and 299250 series are supplied with an 850400 glass hex-head stopper; the others are supplied without a stopper • Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements
Constant Addition Funnels Precision-type for setting flow rates from 1 to 160 drops per minute of water at 25 °C.
•
Shut-off seal is made by lowering the PTFE shoulder into a specially formed glass seat
• Design is based on the Mariotte principle and assures the drop rate regardless of the liquid level • Internal delivery scale is graduated to allow accurate resetting on successive runs • Constructed of glass, PTFE, and CTFE • 634630 series is steam jacketed; hose connections on jacket allow the introduction of steam to heat funnel contents • Probe FKM o-ring is size 110 • Suitable for use under moderate vacuum • Standard Taper 19/22 refill valve/stopper has a special bore to permit initial equilibration of the apparatus when it is used under vacuum • Graduated and numbered both up and down • Supplied with operating instructions • Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements Part Number Capacity (mL) Overall Height (mm)
Capacity; Graduation Intervals (mL)
Part Number
Height (mm) Case Qty
299251-0010 299251-0025 634500-0025 299250-0050 634500-0050 634500-0125 634500-0250 634500-0500
10; 0.2 25; 0.5
190 215 250 230 275 345
1 1 1 1 1 1 1 1
25; 1 50; 1 50; 1
125; 1 250; 5 500; 5
Case Qty
299350-0030 634620-0060 634620-0125 634630-0125 634620-0250 634630-0500
30 60
258 308 308 300 340 390
1 1 1 1 1 1
Replacement Parts
125 125 250 500
Part Number
Description
Case Qty
Size 2 Straight Bore Stopcock Plug, PTFE, 11/25
821001-0002
1
Replacement Parts
Addition Funnels with Threaded Valves This cylindrical funnel has a threaded, grease-free extended tip PTFE valve for semi-needle action and a pressure equalizing arm.
Part Number 299351-0060
Description
Case Qty
Funnel Probe Only, 60mL
1
19/22 Stopper for 299350 Series Constant Addition Funnel Addition Funnel Probe, for 500mL
634623-0000
1
634621-0500
1
•
Graduated
• Top and bottom Standard Taper joints are the same size • Funnels with 14/20 and 19/22 joints are supplied complete with a stopper • Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements
Hirsch Funnels The conical funnel shape of the Hirsch filter directs filtrate through a reduced area frit to concentrate crystal residue for rewashing.
Capacity; Graduation Intervals (mL)
Standard Taper Joints
Case Qty
Part Number
634100-0050 634120-0060 634100-0125 634100-0250 634110-0250 634100-0500
50; 1 60; 1
14/20 24/40 24/40 24/40 29/26 24/40
1 1 1 1 1 1
•
Available in three porosities: Fine (4-5.5 microns), Medium (10-15 microns) and Coarse (40-60 microns)
125; 1 250; 5 250; 5 500; 5
•
Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements
Overall Height x Disc Diameter (mm)
Porosity (microns)
Part Number
Case Qty
955250-5026 955250-5044 955250-5023 955250-7526 955250-7544 955250-7523 955250-3523
115 x 20 115 x 20 115 x 20 145 x 30 145 x 30 145 x 30 180 x 10
4-5.5 10-15 40-60 4-5.5 10-15 40-60 40-60
1 1 1 1 1 1 1
Replacement Parts
Part Number
Description
Case Qty
14/20 Hollow Glass Hex Head Stopper, Medium Length, for 634100-0050 29/26 Hollow Glass Hex Head Stopper, Medium Length, for 634110-0250 Size 2 Threaded Plug, PTFE, for 125 mL and smaller Size 4 Threaded Plug, PTFE, for 250 mL and larger
850400-1420
1
850400-2926
1
826411-0002
1
826411-0004
1
Powered by FlippingBook