You are using an unsupported browser.
Some features of this site may not function properly. For optimal user experience, please view this site in Chrome, Firefox, Safari, or Edge.

SpectraPor® Tubing Closures

Available in three functional types, SpectraPor® Tubing Closures are intended for use with Regenerated Cellulose (RC) dialysis tubing to ensure a leak-proof seal. These closures are not recommended for use with Cellulose Ester (CE).

SpectraPor® Tubing Closures

SpectraPor® Closures are designed with tight-gripping seal ridges that provide a reliable leak-proof seal for thin-walled and more flexible dialysis tubing. These closures should be used only with RC and low MWCO (=< 20 kD) CE dialysis tubing.  For best results, select a pair of closures that has a sealing width 4 to 10 mm longer than the flat width of the dialysis tubing to ensure a proper seal.

Made from polypropylene (PP) material, the compatibility of SpectraPor® Closures with specific solvents should be confirmed on the Repligen Chemical Compatibility table.

SpectraPor® Closures are available in three functional types for improved dialysis efficiency: Standard, Weighted and Magnetic.

Standard type closure

SpectraPor® Standard Closures float and aid in sample buoyancy when applied to the top-end of the dialysis tubing; autoclavable and available in a variety of colors for easy sample identification.

Product Specifications
Functional Benefit: Sample buoyancy & vertical orientation
Membrane Types: Standard RC only
6 Sealing Widths: 12, 23, 35, 55, 75 & 90  mm
4 Colors: Orange, white, green, blue
Quantity: 10/pkg
Material: Polypropylene
Temperature: 0 - 121°C (autoclavable)

Weighted Type Closure

SpectraPor® Weighted Closures have an encased stainless-steel bar for additional weight. When applied to the end of the dialysis tubing, the end turns downward to ensure a vertical orientation while providing a leak-proof seal.

Product Specifications
Functional Benefit: Weighted for vertical sample orientation
Membrane Types: Standard RC, Biotech RC & low MWCO Biotech CE (=< 20 kD),   Not recommended for use with high MWCO Biotech CE (> 20 kD)
6 Sealing Widths: 12, 23, 35, 55, 75 & 90  mm
1 Color: White
Quantity: 10/pkg
Material: Polypropylene
Temperature: 0 - 121 °C (autoclavable)

Paired (Standard and Weighted) Closures

SpectraPor® Paired Closures combines 10 standard and 10 weighted closures for dialysis convenience. Optimal sample buoyancy and vertical orientation can be achieved by applying both a Standard and a Weighted closure to opposite ends of the same dialysis tubing.  

Product Specifications
Functional Benefit: Buoyancy and vertical orientation
Membrane Types: Standard RC, Biotech RC & low MWCO Biotech CE (=< 20 kD),   Not recommended for use with high MWCO Biotech CE (> 20 kD)
6 Sealing Widths: 12, 23, 35, 55, 75 & 90  mm
2 Colors: Orange (standard) and White (weighted)
Quantity: 10 standard & weighted pairs/pkg
Material: Polypropylene
Temperature: 0 - 121 °C (autoclavable)

Magnetic Type Closure

SpectraPor® Magnetic-Weighted Closures contain a magnetic fluorocarbon coated stainless steel bar, eliminating the need for conventional stir bars. Applied to the bottom end of the dialysis tubing, this closure provides complete sample submersion and rotation on a stir plate.

Product Specifications
Functional Benefit: Vertical orientation and rotation
Membrane Types: Standard RC, Biotech RC & low MWCO Biotech CE (=< 20 kD),   Not recommended for use with high MWCO Biotech CE (> 20 kD)
4 Sealing Widths: 23 mm, 35 mm, 55 mm, 75 mm
1 Color: Red
Quantity: 2/pkg
Material: Polypropylene (PP), fluorocarbon-coated magnetic SS bar
Temperature: 0 - 121 °C (autoclavable)

Part Numbers

Expand All
Closure Type Color Sealing Width Qty
12 mm 23 mm 35 mm 55 mm 75 mm 90 mm
Standard Orange
White
Green
Blue
132734
142734
142834
142934
132735
142735
142835
142935
132736
142736
142837
142936
132737
142737
142837
142937
132738
142738
142838
142938
132739
142739
142839
142939
10/pkg
Weighted White 132742 132743 132744 132745 132746 132747 10/pkg
Paired Orange/White 132749 132750 132751 132752 132753 132748 10 pairs
Magnetic Red - 132760 132762 132764 132766 - 2/pkg

 

Resources

Expand All

Frequently Asked Questions | Dialysis