Diba Custom ►Tubing Assemblies Specifications Guide

Diba Industries manufacturers over 5,000 unique tubing assembly part numbers annually; each designed per customer’s specification. These tubing assemblies generally fall into two categories: Precision, Chemically Inert Tubing Assemblies for the sample side of an instrument, and Soft Tubing Assemblies for the wash & waste side of an instrument.
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These tubing assemblies usually carry multiple sample and reagent fluids. In most cases, precision tubing assemblies must be chemically inert, and properly designed to avoid “dead volume” areas in the flow path. Dead volume leads to “carry-over”, due to residual material in the flow path that carries over to the next test sample. Any carry-over reduces the accuracy of the proceeding test samples.

Precision tubing assemblies are usually washed and rinsed after every test sample, and therefore should be replaced periodically to maintain chemical inertness and test accuracy. 

Precision, Chemically Inert Tubing Assemblies

Tubing: FEP, PFA, PTFE, ETFE, PEEK, PP, PE, THV, Ultem, EVA
Fittings: PP, PEEK, POM, PC, St. Stl.
Threads: #6-40, #10-32, M6, ¼-28, 5/16-24
Style: Click-N-Seal®, Omnilok®, Torque-Right™, Headless, Standard
Connections: Flare, Ferrule, Gripper
Diameter’s: IDs from .003” up to .250”
Pressures: Up to 7,000 psi
Labels: Heat Shrink & Laser Etched onto tubing
Thermoformed Shapes & Coils
Volume Reduction- “Drawn Down”
Bundled
Color Coded
Kitted 

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Soft Tubing Assemblies (Pump, Wash, Rinse & Waste Applications)

These are tubing assemblies that carry the same fluid.  A soft tubing assembly usually does not carry sample fluids and therefore does not require the same level of chemically inertness as precision tubing assemblies. 

Since soft tubing assemblies are not designed to be chemically inert residue material can build-up in the tubing and reduce the flow path, and therefore should be replaced periodically to maintain a consistent flow path. 

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MicroBarb™ Tubing Assemblies

MicroBarb™ tubing assemblies provide a low-carryover connection between flexible soft tubing and semi rigid tubing. The chemically inert PEEK connector is designed to grip the soft tubing ID & OD. 

The MicroBarb™ Accommodates: 

All soft tubing materials 

Tubing IDs from 0.010” to 0.060” 

Tubing ODs from 0.062” to 0.156” 

Flat bottom ¼-28 & M6 fittings 

Use the design guide below to determine the proper MicroBarb™ for your application. 

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Thermoforming

Tight spaces in analytical instruments can often make it difficult to maintain consistent fluid paths in regular tubing. Thermoformed tubing assemblies from Diba Industries can be custom designed with bends and coils that fit neatly into instruments, preventing kinking and improper installation for problem-free processing. 

Sample, reagent, wash, waste and other fluids pass smoothly through the precision bends and coils of thermoformed tubing, minimizing blockages and maintaining desired flow rate. The tubing design creates a one way fit, ensuring that assemblies can only be installed in the correct direction. The ends of the thermoformed fluoropolymer tubing are flared using Diba’s proprietary thermal forming technique and backed with a washer and threaded bottom seal fitting to create a leak tight seal. 

Thermoformed tubing can be configured in any shape needed. Available tubing materials include FEP, PTFE, PFA, ETFE, PVC, LDPE, PVDF, TPU, and PEEK. With the ability to maintain tight tolerances, Diba offers inside diameters from .010” to .875” and outside diameter of 1.00”. Assemblies can be custom labeled and packaged, with nine distinct fitting colors available, to speed instrument build cycle and field service times. Diba’s technical staff is available to assist in specifying configurations suited to any application.