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  8. Masterflex I/P Tubing Options

Masterflex I/P Tubing Options

Achieve top performance from your Masterflex I/P pump heads when you use precision-extruded tubing. Tubing is manufactured to tight tolerances that match our I/P pump heads. Choose from precision tubing or high-performance precision tubing. High-performance precision tubing has a thicker wall that improves pressure generation, suction lift, ability to pump viscous fluids, and tubing life. Choose from over a dozen different formulations.

Precision Tubing Specifications

Tubing size I/P 26 I/P 73 I/P 82
Inside diameter (nominal) 0.25" (6.4 mm) 0.37" (9.5 mm) 0.5" (12.7 mm)
Hose barb size (nominal) 1/4" (6.4 mm) 3/8" (9.5 mm) 1/2" (12.7 mm)
Flow range (approximate) with 20 to 650 rpm drive 0.12 to 4 L/min
(0.03 to 1.1 GPM)		 0.2 to 8 L/min
(0.05 to 2.1 GPM)		 0.4 to 13 L/min
(0.1 to 3.5 GPM)
Maximum pressure, continuous** 25 psig (1.7 bar) 10 psig (0.7 bar)
Maximum pressure, intermittent** 40 psig (2.7 bar) 20 psig (1.4 bar)
Maximum vacuum** 26" Hg (660 mm Hg) 20" Hg (510 mm Hg)
Suction lift 29 ft H2O (8.8 m H2O) 23 ft H2O (7.0 m H2O)

High-Performance Precision Tubing Specifications

Tubing size I/P 70 I/P 88 I/P 89
Inside diameter (nominal) 0.37" (6.4 mm) 0.5" (12.7 mm) 0.62"
(15.88 mm)
Hose barb size (nominal) 3/8" (9.5 mm) 1/2" (12.7 mm) 5/8" (15.88 mm)
Flow range (approximate) with 20 to 650 rpm drive 0.24 to 8 L/min
(0.06 to 10 GPM)		 0.5 to 15 L/min
(0.05 to 2.1 GPM)		 0.52 to 17 L/min
(0.14 to 4.5 GPM)
Maximum pressure, continuous** 25 psig (1.7 bar) 20 psig (1.4 bar) 15 psig (1.0 bar)
Maximum pressure, intermittent** 40 psig (2.7 bar) 35 psig (1.4 bar) 25 psig (1.4 bar)
Maximum vacuum** 26" Hg (660 mm Hg) 24" Hg (610 mm Hg)
Suction lift 29 ft H2O (8.8 m H2O) 27 ft H2O (8.2 m H2O)

**Actual performance varies depending on tubing formulation—values shown are for firm tubing.

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