PUN-H-6X1-BL Festo Plastic Tubing

Technical Overview

The Festo PUN-H-6X1-BL is a high-performance plastic tubing manufactured from hydrolysis-resistant TPE-U (Polyurethane). Designed for versatility, it is suitable for both compressed air and water mediums, offering excellent resistance to environmental factors. Its ether-based construction makes it ideal for use in energy chains and food industry applications. This blue-colored tubing is also characterized by its suitability for Li-ion battery production and compliance with RoHS standards, ensuring reliability in demanding automation environments.

Key Features

Hydrolysis resistant ether-based material
Suitable for use in energy chains
Suitable for food industry applications
Suitable for Li-ion battery production (F1a)
German Technical Control Board (TÜV) approved
RoHS-compliant material
Compatible with push-in connectors and barbed fittings

Technical Specification Matrix

Parameter	Value
Outside diameter	6 mm
Flow-relevant bending radius	26 mm
Inside diameter	4 mm
Min. bending radius	10 mm
Instructions on use	TPE-U Ether based
Tubing characteristics	Suitable for energy chains
Operating pressure complete temperature range (MPa)	-0.095 MPa ... 0.6 MPa
Operating pressure complete temperature range (bar)	-0.95 bar ... 6 bar
Operating pressure complete temperature range (psi)	-13.775 psi ... 87 psi
Temperature-dependent operating pressure (MPa)	-0.095 MPa ... 1 MPa
Temperature-dependent operating pressure (bar)	-0.95 bar ... 10 bar
Temperature-dependent operating pressure (psi)	-13.775 psi ... 145 psi
Note on operating pressure	Water: temperature-dependent operating pressure, see diagram, max. 0.3 MPa at 0–60 °C
Approval	German Technical Control Board (TÜV)
Certificate issuing authority	B 013277 0527 00
Operating medium	Compressed air to ISO 8573-1:2010 [7:-:-]; Water (liquid, ice-free)
Fire test material	UL94 HB
LABS (PWIS) conformity	VDMA24364-B2-L
Suitability for the production of Li-ion batteries	Suitable for battery production with reduced Cu/Zn/Ni values (F1a)
Cleanroom suitability	Element installed statically, no meaningful evaluation possible according to ISO 14644-1
Suitable for use with food	See supplementary material information
Ambient temperature	-35 °C ... 60 °C
Product weight according to length	0.0183 kg/m
Pneumatic connection	For push-in connector O.D. 6 mm; For barbed fitting I.D. 4 mm with union nut
Colour	Blue
Shore hardness	D 52 +/-3
Note on materials	RoHS-compliant
Material tubing	TPE-U(PU)

Industrial Applications

1. Dynamic Pneumatic Routing in Li-ion Battery Cell Assembly

Utilizing the PUN-H tubing within the continuous-flex energy chains of high-speed pick-and-place robots. It supplies compressed air to pneumatic vacuum grippers that transport delicate battery electrodes and separator sheets.

Problem Solved

Standard pneumatic tubing materials can shed trace heavy metal particles, but this tubing's F1a suitability ensures reduced Cu/Zn/Ni values, preventing internal short circuits in battery cells. Its 10 mm minimum bending radius prevents kinking during tight, repetitive robotic energy chain movements.

Suitable for battery production (F1a)Suitable for energy chainsMin. bending radius 10 mmOperating pressure -0.95 bar ... 10 bar

2. Pneumatic Control for Automotive Paint Spray Cells

Supplying precise compressed air to pneumatic actuators, valves, and positioning cylinders inside a commercial automotive painting and drying cell, which experiences ambient temperatures up to 60 °C.

Problem Solved

Silicone and other contaminants from standard plastics can cause fisheyes and craters in fresh automotive paint. The tubing's VDMA24364-B2-L LABS (PWIS) conformity guarantees it is completely free of paint-wetting impairment substances, eliminating costly paint finish rework.

LABS (PWIS) conformity VDMA24364-B2-LAmbient temperature -35 °C ... 60 °CCompressed air to ISO 8573-1:2010TPE-U(PU) material

3. Washdown-Resistant Actuation in Food Packaging Machinery

Routing compressed air for packaging line diverters and low-pressure water for localized washdown mechanisms in a highly humid food processing environment, effectively standardizing on a single tubing type for multiple media.

Problem Solved

Traditional ester-based polyurethane tubing degrades quickly via hydrolysis when exposed to constant moisture and water washdowns. This ether-based TPE-U tubing resists hydrolysis and microbes, safely handling water up to 0.3 MPa at 60 °C while maintaining food-safe compliance.

TPE-U Ether basedWater (liquid, ice-free)max. 0.3 MPa at 0-60 °CSuitable for use with food