PUN-H-8X1,25-BL Festo Plastic Tubing

Technical Overview

The Festo PUN-H-8X1,25-BL is a high-quality polyurethane (TPE-U) plastic tubing designed for flexible pneumatic connections. This ether-based material offers excellent hydrolysis resistance, making it suitable for both compressed air and water applications. It is specifically engineered to be compatible with energy chains and supports a wide temperature-dependent operating pressure range. The tubing's construction ensures suitability for diverse industrial environments, including food processing and lithium-ion battery production.

Key Features

Suitable for energy chains
Hydrolysis resistant ether-based material
Suitable for the production of Li-ion batteries (F1a)
RoHS-compliant
TÜV approved
Compatible with push-in connectors and barbed fittings

Technical Specification Matrix

Parameter	Value
Outside diameter	8 mm
Inside diameter	5.7 mm
Flow-relevant bending radius	37 mm
Min. bending radius	21 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	0.0287 kg/m
Pneumatic connection (Push-in)	For push-in connector O.D. 8 mm
Pneumatic connection (Push-in alternative)	For push-in connector outside diameter of 5/16"
Pneumatic connection (Barbed)	For barbed fitting inside diameter of 6 mm with union nut
Colour	Blue
Shore hardness	D 52 +/-3
Note on materials	RoHS-compliant
Material tubing	TPE-U(PU)

Industrial Applications

1. Lithium-ion Battery Cell Assembly Automation

Routing compressed air to automated pneumatic actuators and grippers handling sensitive battery cells on a high-speed assembly line.

Problem Solved

Standard pneumatic tubing introduces heavy metal contamination risks and fatigues quickly in moving tracks. This tubing eliminates copper, zinc, and nickel contamination risks while surviving high-cycle flexing in robotic energy chains.

Reduced Cu/Zn/Ni values (F1a)Suitable for energy chainsMin. bending radius 21 mmTemperature-dependent operating pressure -0.95 bar ... 10 barTPE-U(PU)

2. Food Packaging Washdown Equipment

Supplying compressed air and cooling water to pneumatic machinery in food processing and packaging zones subjected to frequent washdowns and high humidity.

Problem Solved

Conventional ester-based polyurethane tubing degrades and cracks when exposed to water due to hydrolysis. This ether-based tubing resists hydrolysis, safely delivers both compressed air and water, and meets food industry safety guidelines.

TPE-U Ether basedWater (liquid, ice-free)Suitable for use with foodMax 0.3 MPa water pressure at 0-60 °CColour Blue

3. Dynamic End-of-Arm Tooling in Cold Storage Robotics

Providing a continuous, flexible pneumatic connection to robotic end-effectors used for automated palletizing and material handling inside freezer and cold storage warehouses.

Problem Solved

Standard plastic tubing becomes rigid, brittle, and prone to snapping or kinking in freezing environments. This tubing maintains its flexibility and flow integrity in moving cable tracks at extreme sub-zero conditions.

Ambient temperature -35 °C ... 60 °CFlow-relevant bending radius 37 mmSuitable for energy chainsShore hardness D 52 +/-30.0287 kg/m lightweight