Dialysis Tubing Closures

Using resealable closures is the preferred method for sealing dialysis tubing without the risk of leaking. Tied knots are nearly impossible to open & re-seal and often result in damaged, leaking membranes. Spectrum offers two classes of Dialysis Tubing Closures, Universal Closures for use with all membrane types and specialized Spectra/Por® Closures with additional functional benefits for use only with Standard Grade tubing.

Spectra/Por Closures for Standard RC Membrane Only

Spectrum offers 3 different functional closure types (Standard, Weighted & Magnetic Weighted) as well as a functional combination pair of closures (Standard & Weighted).

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. This assures a proper seal without membrane tearing.

Standard Closure Type
Since Spectra/Por Standard Closures float, they aid in buoyancy and vertical orientation when applied to the tubing top end. 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
Qty:
10/pkg
Material:
Polypropylene
Temperature:
0 - 121°C (autoclavable)
Part Number Color Closure Seal Width Quantity Price
132734 Orange 12 mm 10/pkg
132735 Orange 23 mm 10/pkg
132736 Orange 35 mm 10/pkg
132737 Orange 55 mm 10/pkg
132738 Orange 75 mm 10/pkg
132739 Orange 90 mm 10/pkg
142734 White 12 mm 10/pkg
142735 White 23 mm 10/pkg
142736 White 35 mm 10/pkg
142737 White 55 mm 10/pkg
142738 White 75 mm 10/pkg
142739 White 90 mm 10/pkg
142834 Green 12 mm 10/pkg
142835 Green 23 mm 10/pkg
142836 Green 35 mm 10/pkg
142837 Green 55 mm 10/pkg
142838 Green 75 mm 10/pkg
142839 Green 90 mm 10/pkg
142934 Blue 12 mm 10/pkg
142935 Blue 23 mm 10/pkg
142936 Blue 35 mm 10/pkg
142937 Blue 55 mm 10/pkg
142938 Blue 75 mm 10/pkg
142939 Blue 90 mm 10/pkg

Weighted Closure Type
Autoclavable, Spectra/Por Weighted Closures encase an acid- washed, fluorocarbon coated, stainless steel bar. When applied to bottom end of the dialysis tubing, the Weighted Closure acts like an anchor to maintain a vertical orientation of the sample.

Product Specifications
Functional Benefit:
Weighted for vertical sample orientation
Membrane Types:
Standard RC only
6 Sealing Widths:
12, 23, 35, 55, 75 & 90 mm
1 Colors:
White
Qty:
10/pkg
Material:
Polypropylene
Temperature:
0 - 121°C (autoclavable)
Part Number Color Closure Seal Width Quantity Price
132742 White 12 mm 10/pkg
132743 White 23 mm 10/pkg
132744 White 35 mm 10/pkg
132745 White 55 mm 10/pkg
132746 White 75 mm 10/pkg
132747 White 90 mm 10/pkg

Magnetic Closure Type
Autoclavable Spectra/Por 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 submersion and gentle rotation of the sample on a stir plate.

Product Specifications
Functional Benefit:
Weighted & magnetic for submersion & stirring
Membrane Types:
Standard RC only
4 Sealing Widths:
23, 35, 55, 75 mm
1 Colors:
Red
Qty:
2/pkg
Material:
Polypropylene
Temperature:
0 - 121 °C (autoclavable)
Part Number Color Closure Seal Width Quantity Price
132760 Red 23 mm 2/pkg
132762 Red 35 mm 2/pkg
132764 Red 55 mm 2/pkg
132766 Red 75 mm 2/pkg

Paired Standard & Weighted Closures
The ultimate sample buoyancy and vertical orientation can be achieved by applying both a Standard and a Weighted Spectra/Por Closure to opposite ends of the same dialysis tubing. The Paired Closures are autoclavable.

Product Specifications
Functional Benefit:
Buoyancy and vertical orientation
Membrane Types:
Standard RC only
6 Sealing Widths:
12, 23, 35, 55, 75 & 90 mm
2 Colors:
Orange (standard) and White (weighted)
Qty:
10 standard & weighted pairs/pkg
Material:
Polypropylene
Temperature:
0 - 121 °C (autoclavable)
Part Number Color Closure Seal Width Quantity Price
132749 Orange/White 12 mm 10 pairs/pkg
132750 Orange/White 23 mm 10 pairs/pkg
132751 Orange/White 35 mm 10 pairs/pkg
132752 Orange/White 55 mm 10 pairs/pkg
132753 Orange/White 75 mm 10 pairs/pkg
132748 Orange/White 90 mm 10 pairs/pkg
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