Pneumatic and fluid transfer systems rely on tubing that can handle pressure, temperature changes, and demanding conditions without failure. Alkon DuraLink™ industrial tubing is built for these environments, maintaining leak-free performance and consistent results over time.

Manufactured in North America, DuraLink™ industrial tubing follows ISO 9001:2015-certified processes and undergoes 100% testing. Paired with Alkon fittings, the tubing creates reliable connections that help maintain uptime, efficiency, and safety.

The Right Tubing for Your System

Choose the tubing material that best fits your application requirements

AP Series – Polyethylene Tubing

Lightweight and flexible, this tubing is well suited for FDA applications. It is also resistant to solvents and chemicals.

PUR Series – Polyurethane Tubing

Offers high flexibility and strong resistance to kinks, abrasion, and chemicals. It is ideal for vacuum, fuel line, and robotics applications.

NY Series – Nylon 12 Tubing

Provides greater durability for high-pressure applications. Well suited for pneumatics, chemicals, lubricants, and low-pressure hydraulics.

MNY Series – Metric Nylon 12 Tubing

Same core characteristics as NY series tubing, available in metric sizes.

Design Specifications

Abbreviation Tubing Type/Material Temperature Pressure Range @ 75°F Design Information
AP Polyethylene -40°F
to 150°F		 135 PSI
to 305 PSI		 Resistant to solvents & chemicals;
Natural: FDA approved;
Lightweight and more flexible
PUR Polyurethane -40°F
to 165°F		 170 PSI
to 265 PSI		 Resistant to kinks, abrasions, and chemicals;
Applications include vacuum, fuel lines, robotics;
Highly flexible tubing
NY Nylon -60°F
to 200°F		 240 PSI
to 350 PSI		 Applications include air, chemicals,
lubricants, and low-pressure hydraulics
MNY Metric Nylon -60°F
to 200°F		 150 PSI
to 350 PSI

Part Number Guide

Part numbers follow the format: Material/Size – Color – Length (Example: AP22-BL-100).

Color Code Color Color Code Color
BL Black Y Yellow
BR Brown O Orange
GR Gray W White
R Red N Natural
GN Green S Silver
B Blue P Purple

Tubing Part Numbers

POLYETHYLENE TUBING
Material/Size Tube O.D. Tube I.D. Wall
Thickness		 Min. Bend
Radius		 Working Pressure @ 75°F Working Pressure @ 150°F Colors (See key above) Lengths (feet)
AP22 1/8 .062 .031 1/2 305 PSI 120 PSI BL/GR/R/GN/B/Y/O/N 100/500/1000
AP5/32 5/32 .106 .025 1 175 PSI 70 PSI BL/R/GN/B/Y/N 100/500/1000
AP44 1/4 .170 .040 1-1/4 200 PSI 80 PSI BL/GR/R/GN/B/Y/O/N/P 100/500/1000
AP55 5/16 .187 .062 1-1/2 230 PSI 90 PSI BL/GN/B/Y/N 100/500
AP66 3/8 .250 .062 2 190 PSI 75 PSI BL/GR/R/GN/B/Y/O/N 100/500
AP88 1/2 .375 .062 2-1/2 135 PSI 55 PSI BL/R/GN/B/Y/O/N 100/250/500
POLYURETHANE TUBING
Material/Size Tube O.D. Tube I.D. Wall
Thickness		 Min. Bend
Radius		 Working Pressure @ 75°F Working Pressure @ 150°F Colors (See key above) Lengths (feet)
PUR22 1/8 .066 .030 1/4 255 PSI 100 PSI BL/GR/R/GN/B/Y/W/N/P 500/1000
PUR5/32 5/32 .094 .031 3/8 210 PSI 85 PSI BL/BR/GR/R/GN/B/Y/O/N/P/W 100/500/1000
PUR33 3/16 .107 .040 3/8 220 PSI 90 PSI B/Y/N 100/1000
PUR44 1/4 .160 .045 1/2 175 PSI 70 PSI BL/GR/R/GN/B/Y/W/N/P 100/500/1000
PUR44H 1/4 .125 .063 1/2 265 PSI 105 PSI BL/GR/R/GN/B/Y/O/N/W 100/500/1000
PUR66 3/8 .245 .065 7/8 170 PSI 70 PSI BL/GR/R/GN/B/Y/O/N/W 100/500
PUR88 1/2 .320 .090 1-1/8 175 PSI 70 PSI
BL/R/B/Y/N/W
BL/R/GN/B/Y/N/W
50
250
NYLON 12 TUBING
Material/Size Tube O.D. Tube I.D. Wall
Thickness		 Min. Bend
Radius		 Working Pressure @ 75°F Working Pressure @ 150°F Colors (See key above) Lengths (feet)
NY22 1/8 .093 .016 1/2 270 PSI 160 PSI BL/R/GN/B/Y/N 100/500/1000
NY5/32 5/32 .106 .025 1/2 350 PSI 210 PSI BL/S/R/GN/B/Y/O/N 100/500/1000
NY33 3/16 .138 .025 5/8 260 PSI 160 PSI BL/R/B/N 100/500
NY44 1/4 .180 .035 1 290 PSI 170 PSI BL/R/GN/B/Y/O/N 100/500/1000
NY55 5/16 .232 .040 1-1/2 240 PSI 140 PSI BL/R/GN/B/Y/N 100/500
NY66 3/8 .275 .050 1-1/2 250 PSI 150 PSI BL/R/GN/B/Y/O/N 100/500
NY88 1/2 .375 .062 2-1/4 240 PSI 140 PSI BL/R/GN/B/Y/N 100/250/500
METRIC NYLON 12 TUBING
Material/Size Tube O.D. Tube I.D. Wall
Thickness		 Min. Bend
Radius		 Working Pressure @ 75°F Working Pressure @ 150°F Colors (See key above) Lengths (feet)
MNY4 4 mm 2.7 mm .65 mm 12.7 mm 350 PSI 210 PSI BL/S/R/GN/B/Y/O/N 100/500/1000
MNY6 6 mm 4 mm 1.0 mm 17 mm 340 PSI 200 PSI BL/R/GN/B/Y/O/N 100/500/1000
MNY8 8 mm 6 mm 1.0 mm 38 mm 250 PSI 150 PSI BL/R/GN/B/Y/N 100/500
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