Biomedical Cross Fittings

Biomedical cross fittings include tubing connection and flow-control components used in laboratory, technical, and biomedical instrumentation setups. The range supports common commercial tasks such as joining compatible tubing runs, creating branches, adapting between tubing sizes, connecting and separating vacuum lines, and helping control or prevent reverse flow in liquid or gas assemblies.

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Helpful Buying Guide

Choose tubing fittings and flow controls for your assembly

Start with the job the component must perform: join, branch, reduce, disconnect, stop flow, or help prevent backflow. Then compare tubing inside diameter, connection style, material, and application-specific details such as autoclavability, temperature, pressure, or direct-contact suitability where stated.

Visual Guide

Popular examples in this category

LDPE Check Valve for Vacuum LinesLDPE Check Valve for Vacuum LinesWBB3075752Polyethylene Quick Disconnect for 1/8 to 1/4 Inch TubingPolyethylene Quick Disconnect for 1/8 to 1/4 Inch TubingWBB3075857Polypropylene T Tubing Connector for 1/4-Inch Tubing, 12PkPolypropylene T Tubing Connector for 1/4-Inch Tubing, 12PkWBB3076264Polypropylene Wye Tubing Connector for 1/2-Inch TubingPolypropylene Wye Tubing Connector for 1/2-Inch TubingWBB3076114
Use Cases

Build, branch, and control tubing runs

Use straight connectors for inline tubing runs, T connectors for three-way junctions, wye connectors for branched lines, and stepped connectors when compatible tubing inner diameters differ. Check valves support one-way flow or backflow prevention, while pinch valves provide manual fluid control.

How to Choose

Match the fitting to tubing and operating needs

Confirm the compatible tubing inside diameter first. Compare barbed, tapered, stepped, or quick-disconnect connection styles, then review material and stated limits such as 20 psi for applicable check valves or 80°C for the listed polyethylene quick disconnect.

Applications

Support laboratory and technical assemblies

The represented components are used in vacuum lines, filter-flask connections, liquid or gas transfer setups, and flexible tubing lines. Certain polypropylene connectors are identified for direct contact with food, drugs, and cosmetics.

Additional Information

Review autoclavability and flow behavior

Several polypropylene connectors and check valves are autoclavable. The listed pinch valve supports steam autoclaving at 121°C (250°F), and the straight 5-in-1 connector can also be steam autoclaved at that temperature. Quick-disconnect options help separate assemblies, with one metal female coupling featuring automatic shutoff when disconnected.

1/8–1/4 in.Tapered check-valve range

The tapered polypropylene check valve supports connections in this stated range.

3–12 mmQuick-disconnect tubing range

The listed polyethylene quick-disconnect connector accommodates compatible tubing inside diameters in this range.

20 psiStated check-valve limit

One LDPE check valve lists a 20 PSI maximum, and one polypropylene check valve lists 20 psi as a recommended maximum.

121°CSteam autoclave temperature

The listed pinch valve and 5-in-1 straight connector can be steam autoclaved at 121°C (250°F).

Comparison Guide

Compare common fitting and valve types

Use configuration and function to narrow the choices represented in this category.

Product typeBest suited forSelection details
Straight, T, wye, and stepped connectorsJoining, branching, or adapting compatible tubingMatch the tubing inside diameter and choose inline, three-way, branch, or reducing configuration.
Check valvesVacuum lines and filter-flask setups where reverse flow is a concernCompare tapered or other connection ends, stated pressure guidance, and autoclavability where needed.
Quick disconnects and pinch valvesAssemblies that need separation or hands-on flow controlCompare tubing range, barbed ends, shutoff function, locking style, and manual pinch operation.
Planning Guide

Plan the right fit before choosing

Connection configuration

Select the route your tubing needs to follow

Connector shape determines how compatible tubing is arranged in an assembly.

  • Straight connectors join two same-size tubing lengths inline.
  • T connectors create a three-way junction for compatible 1/4-inch inside-diameter tubing.
  • Wye connectors create a branch between compatible 1/2-inch inner-diameter tubing lengths.
  • Stepped and reducing connectors help join compatible tubing with different inner diameters.
Flow management

Choose valves based on the type of control required

Different valve styles address directional flow, manual flow control, and disconnectable connections.

  • Check valves help prevent reverse flow when pressure is interrupted or line direction changes.
  • A pinch valve opens when its silicone body is squeezed and suspends flow when released.
  • Quick disconnects allow compatible tubing assemblies to be connected and separated as needed.
  • The metal female quick-disconnect coupling includes an automatic shutoff valve that stops flow when disconnected.
Material and process considerations

Compare stated material and processing features

Material and processing needs can narrow the selection for liquid, gas, vacuum, and laboratory setups.

  • Polypropylene connectors are described as chemically resistant for a wide range of liquids or gases.
  • Multiple polypropylene products are autoclavable.
  • The pinch valve includes PTFE, stainless steel, and polypropylene components and is described as chemical resistant.
  • The metal quick-disconnect coupling has a chrome-plated brass body and Buna-N O-ring seal.
FAQ

Common questions before buying

What is the difference between a T connector and a wye connector?

A T connector creates a three-way junction, while a wye connector creates a branch connection. The listed T connector fits 1/4-inch inside-diameter tubing, and the listed wye connector fits 1/2-inch inner-diameter tubing.

Which components help prevent backflow?

The listed check valves help stop reverse flow or liquid backup when pressure is interrupted. One LDPE check valve is intended for one-way directional flow in vacuum lines.

Can these components be autoclaved?

Several listed polypropylene connectors and check valves are autoclavable. The pinch valve and 5-in-1 straight connector are stated to support steam autoclaving at 121°C (250°F).

How do I choose a quick disconnect?

Match the connector to your compatible tubing size and compare the connection style. The listed polyethylene options have barbed ends and support disconnectable assemblies; the metal female coupling accepts flexible 1/4-inch tubing and includes automatic shutoff when disconnected.

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