Coolant compatibility
Glycol blends, dielectric fluids and additives behave differently with elastomers. Confirm the actual coolant and concentration before selecting the tube.
Application · Liquid Cooling
Liquid Cooling Lines
A cooling loop is a chemical system, not just a hose. Coolant compatibility, permeation, bend radius and fitting torque decide whether the line lasts - and the protective layer around it decides whether the rest of the assembly survives a leak.
Application challenges
Where cooling loops fail
Permeation and aging
Thin walls permeate more and harden faster. Balance wall thickness against bend radius and pressure drop.
Bend radius and fittings
Tight bends kink the line and load the fitting. Define the minimum radius and fitting type before cut length is fixed.
Leak containment
A protective sleeve around the line keeps a small leak from reaching electronics, and adds abrasion protection at pass-throughs.
Recommended materials
Tube and protection by position
PTFE tube
Chemically inert, low friction bore, -200 to 260 °C, for aggressive media and clean loops.
View detailsSilicone hose
Flexible, high-purity tubing for coolant and steam lines with custom ID / OD.
View detailsCorrugated tube
Outer routing protection with high crush resistance at chassis and cabinet pass-throughs.
View detailsSelf-wrapping sleeve
Wrap-around abrasion and leak-containment layer for installed lines.
View detailsPTFE heat shrink tubing
Chemical-resistant protection at fittings and sensor transitions.
View detailsSelection checklist
Confirm before quoting
Coolant: Chemistry, concentration, additives and operating temperature
Pressure: Working and burst pressure, pressure drop budget
Dimensions: ID, OD, wall thickness and cut length
Routing: Minimum bend radius, fittings, vibration
Cleanliness: Particle, extractable or cleanliness class requirement
Documents: RoHS / REACH, material declaration, USP Class VI on request
Catalogue values describe the product direction we can supply. Confirm final drawing, grade, tolerance and test method before mass production.
FAQ
Common questions
PTFE or silicone for a coolant loop?
PTFE is chemically inert and has the widest media tolerance; silicone is more flexible and easier to route. For glycol loops with tight bends, silicone often wins on assembly; for aggressive or high-purity media, PTFE is safer.
Can you supply custom diameters?
Yes. ID, OD, wall thickness, colour and length can be specified; tooling and minimum quantity depend on the size.
Do you provide material declarations?
RoHS and REACH declarations are available by grade. Food or medical grades with USP Class VI documentation can be quoted on request.
How do you handle permeation concerns?
Permeation scales with wall thickness and temperature. Send the coolant and the acceptable loss rate and we will propose wall thickness and an outer barrier if needed.
Quote and samples
Send the coolant, pressure and routing conditions
Coolant chemistry, working temperature and pressure, ID / OD, bend radius and fitting type are enough for a tube and protection proposal.